1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

FEATURES

5 V supply voltage

Gain controlled wide band VIF-amplifier (AC-coupled)

True synchronous demodulation with active carrier
regeneration (very linear demodulation,
good intermodulation figures, reduced harmonics,
excellent pulse response)

Separate video amplifier for sound trap buffering with
high video bandwidth

VIF AGC detector for gain control, operating as peak
sync detector for B/G

Tuner AGC with adjustable takeover point (TOP)

AFC detector without extra reference circuit

AC-coupled limiter amplifier for sound intercarrier signal

Alignment-free FM-PLL demodulator with high linearity,
switchable de-emphasis for FM

Stabilizer circuit for ripple rejection and to achieve
constant output signals.

GENERAL DESCRIPTION

The TDA9806 is an integrated circuit for multistandard
vision IF signal processing and FM sound demodulation in
TV and VCR sets.

ORDERING INFORMATION

TYPE NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

TDA9806

SDIP32

plastic shrink dual in-line package; 32 leads (400 mil)

SOT232-1

1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

supply voltage

4.5

5.5

supply current

110

i VIF(rms)

vision IF input signal voltage sensitivity
(RMS value)

1 dB video at output

100

o CVBS (p-p)

CVBS output signal voltage
(peak-to-peak value)

1.7

2.0

2.3

3 dB video bandwidth on pin CVBS

B/G standard; C

20 pF;

1 k

; AC load

MHz

S/N (W)

weighted signal-to-noise ratio for video

1.1

intermodulation attenuation at `blue'

f = 1.1 MHz

3.3

intermodulation attenuation at `blue'

f = 3.3 MHz

H(sup)

suppression of harmonics in video
signal

o(rms)

audio output signal voltage for FM
(RMS value)

B/G standard;
54% modulation

0.5

THD

total harmonic distortion for FM

54% modulation

0.15

0.5

S/N (W)

weighted signal-to-noise ratio for FM

54% modulation

1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

PINNING

SYMBOL

PIN

DESCRIPTION

i VIF1

VIF differential input signal voltage 1

i VIF2

VIF differential input signal voltage 2

n.c.

not connected

n.c.

not connected

n.c.

not connected

TADJ

tuner AGC takeover adjust (TOP)

PLL

PLL loop filter

n.c.

not connected

n.c.

not connected

o CVBS

CVBS output signal voltage

n.c.

not connected

o AF

audio voltage frequency output

DEEM

de-emphasis input

DEEM

de-emphasis output

DEC

decoupling capacitor

n.c.

not connected

i FM

sound intercarrier input voltage

n.c.

not connected

TAGC

tuner AGC output

o(int)

sound intercarrier output voltage

o(vid)

composite video output voltage

i(vid)

video buffer input voltage

AFC

AFC output

VCO1

VCO1 reference circuit for 2f

VCO2

VCO2 reference circuit for 2f

ref

reference capacitor

GND

ground

VAGC

VIF AGC capacitor

supply voltage

n.c.

not connected

n.c.

not connected

n.c.

not connected

Fig.2 Pin configuration.

handbook, halfpage

TDA9806

MHA053

TADJ

n.c.

GND

n.c.

VCO2

VCO1

AFC

TAGC

n.c.

o AF

DEEM I

DEEM O

C DEC

o CVBS

PLL

i VIF2

i VIF1

VAGC

ref

Vi FM

o(int)

o(vid)

i(vid)

1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

FUNCTIONAL DESCRIPTION

Vision IF amplifier

The vision IF amplifier consists of three AC-coupled
differential amplifier stages. Each differential stage
comprises a feedback network controlled by emitter
degeneration.

Tuner and VIF AGC

The AGC capacitor voltage is transferred to an internal IF
control signal, and is fed to the tuner AGC to generate the
tuner AGC output current (open-collector output). The
tuner AGC takeover point can be adjusted. This allows the
tuner and the SWIF filter to be matched to achieve the
optimum IF input level.

The AGC detector charges/discharges the AGC capacitor
to the required voltage for setting of VIF and tuner gain in
order to keep the video signal at a constant level.
Therefore for negative video modulation the sync level of
the video signal is detected.

Frequency Phase Locked Loop detector (FPLL)

The VIF-amplifier output signal is fed into a frequency
detector and into a phase detector via a limiting amplifier.
During acquisition the frequency detector produces a DC
current proportional to the frequency difference between
the input and the VCO signal. After frequency lock-in the
phase detector produces a DC current proportional to the
phase difference between the VCO and the input signal.
The DC current of either frequency detector or phase
detector is converted into a DC voltage via the loop filter,
which controls the VCO frequency.

VCO, travelling wave divider and AFC

The VCO operates with a resonance circuit (with L and C
in parallel) at double the PC frequency. The VCO is
controlled by two integrated variable capacitors. The
control voltage required to tune the VCO from its
free-running frequency to actually double the PC
frequency is generated by the Frequency-Phase detector
and fed via the loop filter to the first variable capacitor
(FPLL). This control voltage is amplified and additionally
converted into a current which represents the AFC output
signal. At centre frequency the AFC output current is equal
to zero.

The oscillator signal is divided-by-two with a Travelling
Wave Divider (TWD) which generates two differential
output signals with a 90 degree phase difference
independent of the frequency.

Video demodulator and amplifier

The video demodulator is realized by a multiplier which is
designed for low distortion and large bandwidth. The vision
IF input signal is multiplied with the `in-phase' signal of the
travelling wave divider output.

The demodulator output signal is fed via an integrated
low-pass filter for attenuation of the carrier harmonics to
the video amplifier. The video amplifier is realized by an
operational amplifier with internal feedback and high
bandwidth. A low-pass filter is integrated to achieve an
attenuation of the carrier harmonics. The video output
signal is 1 V (p-p) for nominal vision IF modulation.

Video buffer

For an easy adaption of the sound traps an operational
amplifier with internal feedback is used. This amplifier is
featured with a high bandwidth and 7 dB gain. The input
impedance is adapted for operating in combination with
ceramic sound traps. The output stage delivers a nominal
2 V (p-p) positive video signal. Noise clipping is provided.

Intercarrier mixer

The intercarrier mixer is realized by a multiplier. The VIF
amplifier output signal is fed to the intercarrier mixer and
converted to intercarrier frequency by the regenerated
picture carrier (VCO). The mixer output signal is fed via a
high-pass for attenuation of the video signal components.

1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

FM detector

The FM detector consists of a limiter, an FM-PLL and an
AF amplifier. The limiter provides the amplification and
limitation of the FM sound intercarrier signal before
demodulation. The result is high sensitivity and AM
suppression. The amplifier consists of 7 stages which are
internally AC-coupled in order to minimize the DC offset
and to save pins for DC decoupling.

The FM-PLL consists of an integrated relaxation oscillator,
an integrated loop filter and a phase detector. The
oscillator is locked to the FM intercarrier signal, output
from the limiter. As a result of locking, the oscillator
frequency tracks with the modulation of the input signal
and the oscillator control voltage is superimposed by the
AF voltage. The FM-PLL operates as an FM-demodulator.

The AF amplifier consists of two parts:

1. The AF preamplifier for FM sound is an operational

amplifier with internal feedback, high gain and high
common mode rejection. The AF voltage from the PLL
demodulator, by principle a small output signal, is
amplified by approximately 33 dB. The low-pass
characteristic of the amplifier reduces the harmonics of
the intercarrier signal at the sound output terminal, at
which the de-emphasis network for FM sound is
applied. An additional DC control circuit is
implemented to keep the DC level constant,
independent of process spread.

2. The AF output amplifier (10 dB) provides the required

output level by a rail-to-rail output stage. This amplifier
makes use of an input selector for switching to FM
de-emphasis or mute state, controlled by the mute
switching voltage.

Internal voltage stabilizer and

-reference

The bandgap circuit internally generates a voltage of
approximately 1.25 V, independent of supply voltage and
temperature. A voltage regulator circuit, connected to this
voltage, produces a constant voltage of 3.6 V which is
used as an internal reference voltage.

For all audio output signals the constant reference voltage
cannot be used because large output signals are required.
Therefore these signals refer to half the supply voltage to
achieve a symmetrical headroom, especially for the
rail-to-rail output stage. For ripple and noise attenuation
the

voltage has to be filtered via a low-pass filter by

using an external capacitor together with an integrated
resistor (f

= 5 Hz). For a fast setting to

an internal

start-up circuit is added.

1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

CHARACTERISTICS
V

= 5 V; T

amb

= 25

C; see Table 1 for input frequencies and level; input level V

i IF 1, 2

= 10 mV RMS value (sync-level

for B/G); video modulation DSB; residual carrier B/G: 10%; video signal in accordance with

"CCIR, line 17";

measurements taken in Fig.10; unless otherwise specified.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supply (pin 29)

supply voltage

note 1

4.5

5.5

supply current

110

Vision IF amplifier (pins 1 and 2)

i VIF(rms)

input signal voltage sensitivity
(RMS value)

B/G standard;

1 dB video at output

100

i max(rms)

maximum input signal voltage
(RMS value)

B/G standard;
+1 dB video at output

120

200

o(int)

internal IF amplitude difference
between picture and sound
carrier

within AGC range;
B/G standard;

f = 5.5 MHz

0.7

IFcr

IF gain control range

see Fig.3

i(diff)

differential input resistance

note 2

1.7

2.2

2.7

i(diff)

differential input capacitance

note 2

1.2

1.7

2.5

1,2

DC input voltage

3.4

True synchronous video demodulator; note 3

VCO(max)

maximum oscillator frequency
for carrier regeneration

f = 2f

125

130

MHz

osc

oscillator drift as a function of
temperature

oscillator is free-running;
I

AFC

= 0; note 4

ppm/K

0 ref(rms)

oscillator voltage swing at
pins 24 and 25 (RMS value)

B/G standard

100

130

pcCR

picture carrier capture range

B/G standard

1.5

2.0

MHz

acq

acquisition time

BL = 60 kHz; note 5

i VIF(rms)

VIF input signal voltage
sensitivity for PLL to be locked
(RMS value; pins 1 and 2)

maximum IF gain; note 6

FPLL(offset)

FPLL offset current at pin 7

note 7

4.5

1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

Composite video amplifier (pin 21; sound carrier off)

o video(p-p)

output signal voltage
(peak-to-peak value)

see Fig.7

0.88

1.0

1.12

21(sync)

sync voltage level

B/G standard

1.5

21(clu)

upper video clipping voltage
level

1.1

21(cll)

lower video clipping voltage
level

0.3

0.4

o,21

output resistance

note 2

int 21

internal DC bias current for
emitter-follower

1.6

2.0

21 max(sink)

maximum AC and DC output
sink current

1.0

21 max(source)

maximum AC and DC output
source current

2.0

1 dB video bandwidth

B/G standard; C

50 pF;

1 k

;

AC load

MHz

3 dB video bandwidth

B/G standard; C

50 pF;

1 k

;

AC load

MHz

suppression of video signal
harmonics

50 pF; R

1 k

;

AC load; note 8a

PSRR

power supply ripple rejection at
pin 21

video signal; grey level;
B/G standard; see Fig.8

CVBS buffer amplifier (only) and noise clipper (pins 10 and 22)

i,22

input resistance

note 2

2.6

3.3

4.0

i,22

input capacitance

note 2

1.4

3.0

I,22

DC input voltage

1.5

1.8

2.1

voltage gain

B/G standard; note 9

6.5

7.5

10(clu)

upper video clipping voltage
level

3.9

4.0

10(cll)

lower video clipping voltage
level

1.0

1.1

o,10

output resistance

note 2

int 10

DC internal bias current for
emitter-follower

2.0

2.5

o,10 max(sink)

maximum AC and DC output
sink current

1.4

o,10 max(source)

maximum AC and DC output
source current

2.4

1 dB video bandwidth

B/G standard; C

20 pF;

1 k

;

AC load

8.4

MHz

3 dB video bandwidth

B/G standard; C

20 pF;

1 k

;

AC load

MHz

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

Measurements from IF input to CVBS output (pin 10; 330

between pins 21 and 22, sound carrier off)

o CVBS(p-p)

CVBS output signal voltage
on pin 10 (peak-to-peak value)

note 9

1.7

2.0

2.3

o CVBS(sync)

sync voltage level

B/G standard

1.35

deviation of CVBS output
signal voltage at B/G

50 dB gain control

0.5

30 dB gain control

0.1

o(blBG)

black level tilt in B/G standard

gain variation; note 10

diff

differential gain

"CCIR, line 330"

diff

differential phase

"CCIR, line 330"

deg

1 dB video bandwidth

B/G standard; C

20 pF;

1 k

;

AC load

MHz

3 dB video bandwidth

B/G standard; C

20 pF;

1 k

;

AC load

MHz

S/N (W)

weighted signal-to-noise ratio

see Fig.4 and note 11

S/N

unweighted signal-to-noise
ratio

see Fig.4 and note 11

1.1

intermodulation attenuation at
`blue'

f = 1.1 MHz;
see Fig.5 and note 12

intermodulation attenuation at
`yellow'

f = 1.1 MHz;
see Fig.5 and note 12

3.3

intermodulation attenuation at
`blue'

f = 3.3 MHz;
see Fig.5 and note 12

intermodulation attenuation at
`yellow'

f = 3.3 MHz;
see Fig.5 and note 12

c(rms)

residual vision carrier
(RMS value)

B/G standard; fundamental
wave and harmonics

H(sup)

suppression of video signal
harmonics

note 8a

H(spur)

spurious elements

note 8b

PSRR

power supply ripple rejection at
pin 10

video signal; grey level;
B/G standard; see Fig.8

VIF-AFC detector (pin 28)

charging current

B/G standard; note 10

0.75

1.25

discharging current

B/G standard

resp

AGC response to an
increasing VIF step

B/G standard; note 13

0.05

0.1

ms/dB

AGC response to a decreasing
VIF step

B/G standard

2.2

3.5

ms/dB

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

Tuner AGC (pin 19)

i(rms)

IF input signal voltage for
minimum starting point of tuner
takeover (RMS value)

input at pins 1 and 2;
R

TOP

= 22 k

;

= 0.4 mA

IF input signal voltage for
maximum starting point of
tuner takeover (RMS value)

input at pins 1 and 2;
R

TOP

= 0

;

= 0.4 mA

100

o,19

permissible output voltage

from external source; note 2

13.2

sat,19

saturation voltage

= 1.5 mA

0.2

TOP,19

variation of takeover point by
temperature

= 0.4 mA

0.03

0.07

dB/K

19(sink)

sink current

no tuner gain reduction;
see Fig.3

= 12 V

2.5

= 13.2 V

maximum tuner gain
reduction

1.5

2.6

IF slip by automatic gain
control

tuner gain current from
20 to 80%

AFC circuit (pin 23); see Fig.6 and note 14

control steepness

note 15

0.5

0.72

1.0

A/kHz

frequency variation by
temperature

AFC

= 0; note 5

ppm/K

o,23

output voltage upper limit

see Fig.6

0.6

0.3

output voltage lower limit

see Fig.6

0.3

0.6

o,23(source)

output source current

150

200

250

o,23(sink)

output sink current

150

200

250

23(p-p)

residual video modulation
current (peak-to-peak value)

B/G standard

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

Intercarrier mixer (B/G standard; pin 20)

o(rms)

IF intercarrier level
(RMS value)

note 16

3 dB intercarrier bandwidth

upper limit

7.5

MHz

c(rms)

residual sound carrier
(RMS value)

fundamental wave and
harmonics

o,20

output resistance

note 2

O,20

DC output voltage

2.0

int 20

DC internal bias current for
emitter-follower

1.5

1.9

20 max(sink)

maximum AC and DC output
sink current

1.1

1.5

20 max(source)

maximum AC and DC output
source current

3.0

3.5

Limiter amplifier (pin 17); note 17

i FM(rms)

input signal voltage for lock-in
(RMS value)

100

i FM(rms)

input signal voltage
(RMS value)

300

400

allowed input signal voltage
(RMS value)

200

i,17

input resistance

note 2

480

600

720

I,17

DC input voltage

2.8

FM-PLL detector

i FM(catch)

catching range of PLL

upper limit

7.0

MHz

lower limit

4.0

MHz

i FM(hold)

holding range of PLL

upper limit

9.0

MHz

lower limit

3.5

MHz

acq

acquisition time

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

--------------

40 dB

1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

FM operation (B/G standard; pin 12); notes 17 and 17a

o AF12(rms)

AF output signal voltage
(RMS value)

without de-emphasis;
short-circuit from
pin 13 to pin 14; 27 kHz
(54% FM deviation);
see Fig.10 and note 18

= 470

200

250

300

= 0

400

500

600

o AF12(cl)

AF output clipping signal
voltage level

THD < 1.5%

1.3

1.4

frequency deviation

THD < 1.5%; note 18

kHz

temperature drift of AF output
signal voltage

dB/K

DC voltage at decoupling
capacitor

voltage dependent on VCO
frequency; note 19

1.2

3.0

output resistance

note 2

100

DC output voltage

tracked with supply voltage

12 max(sink)

maximum AC and DC output
sink current

1.1

12 max(source)

maximum AC and DC output
source current

1.1

3 dB video bandwidth

without de-emphasis;
short-circuit from
pin 13 to pin 14

100

125

kHz

THD

total harmonic distortion

0.15

0.5

S/N (W)

weighted signal-to-noise ratio

FM-PLL only; with 50

de-emphasis; 27 kHz
(54% FM deviation);
"CCIR 468-4"

c(rms)

residual sound carrier
(RMS value)

fundamental wave and
harmonics

AM suppression

s de-emphasis; AM:

f = 1 kHz; m = 0.3 refer to
27 kHz (54% FM deviation)

mute attenuation of AF signal

B/G standard

DC jump voltage of AF output
terminal for switching AF
output to mute state and vice
versa

FM-PLL in lock mode

150

PSRR

power supply ripple rejection at
pin 12

= 470

; see Fig.8

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

Notes

1. Values of video and sound parameters are decreased at V

= 4.5 V.

2. This parameter is not tested during production and is only given as application information for designing the

television receiver.

3. Loop bandwidth BL = 60 kHz (natural frequency f

= 15 kHz; damping factor d = 2; calculated with sync level within

gain control range). Resonance circuit of VCO: Q

> 50; C

ext

= 8.2 pF

0.25 pF; C

int

8.5 pF (loop voltage

approximately 2.7 V).

4. Temperature coefficient of external LC-circuit is equal to zero.

5. V

i IF

= 10 mV (RMS);

f = 1 MHz (VCO frequency offset related to picture carrier frequency); white picture

video modulation.

6. V

i IF

signal for nominal video signal.

7. Offset current measured between pin 7 and half of supply voltage (V

= 2.5 V) under the following conditions: no

input signal at VIF input (pins 1 and 2) and VIF amplifier gain at minimum (V

= V

8. Measurements taken with SAW filter G1962 (sound shelf: 20 dB); loop bandwidth BL = 60 kHz:

a) modulation VSB; sound carrier off; f

video

> 0.5 MHz.

b) sound carrier on; f

video

= 10 kHz to 10 MHz.

9. The 7 dB buffer gain accounts for 1 dB loss in the sound trap. Buffer output signal is typical 2 V (p-p), in event of

CVBS video amplifier output typical 1 V (p-p). If no sound trap is applied a 330

resistor must be connected from

output to input (from pin 21 to pin 22).

10. The leakage current of the AGC capacitor should not exceed 1

A at B/G standard. Larger currents will increase

the tilt.

11. S/N is the ratio of black-to-white amplitude to the black level noise voltage (RMS value, pin 10). B = 5 MHz weighted

in accordance with

"CCIR 567".

12. The intermodulation figures are defined:

;

1.1

value at 1.1 MHz referenced to black/white signal;

;

3.3

value at 3.3 MHz referenced to colour carrier.

13. Response speed valid for a VIF input level range of 200

V up to 70 mV.

AF performance for FM operation (B/G standard); notes 20, 21 and 22; see Table 1

S/N (W)

weighted signal-to-noise ratio

PC/SC ratio at pins 1 and 2;
27 kHz (54% FM
deviation);

"CCIR 468-4"

black picture

white picture

6 kHz sine wave (black to
white modulation)

sound carrier
subharmonics;
f = 2.75 MHz

3 kHz

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

1.1

at 4.4 MHz

at 1.1 MHz

--------------------------------------

3.6dB

log

3.3

at 4.4 MHz

at 3.3 MHz

--------------------------------------

log

1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

14. To match the AFC output signal to different tuning systems a current source output is provided. The test circuit is

given in Fig.6. The AFC-steepness can be changed by the resistors at pin 23.

15. Depending on the ratio

C/C

of the LC resonant circuit of VCO (Q

> 50; see note 3; C

= C

int

+ C

ext

16. The intercarrier output signal at pin 20 can be calculated by the following formula taking into account the video output

signal at pin 21 (V

o video(p-p)

= 1 V typical) as a reference:

with

= correction term for RMS value,

= sound-to-picture carrier ratio at VIF input (pins 1 and 2) in dB,

6 dB = correction term of internal circuitry
and

3 dB = tolerance of video output and intercarrier output amplitude V

o(rms)

Example: SAW filter G1962 (sound shelf: 20 dB)

o(rms)

= 32 mV typical.

17. Input level for second IF from an external generator with 50

source impedance. AC-coupled with 10 nF capacitor,

mod

= 1 kHz, 27 kHz (54% FM deviation) of audio references. A VIF input signal is not permitted. Pin 28 has to be

connected to positive supply voltage for minimum IF gain. S/N and THD measurements are taken at 50

de-emphasis.

a) Second IF input level 10 mV RMS.

18. Measured with an FM deviation of 27 kHz the typical AF output signal is 500 mV (RMS) (R

= 0

; see Fig.10).

By using R

= 470

the AF output signal is attenuated by 6 dB (250 mV RMS). For handling an FM deviation of

more than 53 kHz the AF output signal has to be reduced by using R

in order to avoid clipping (THD < 1.5%).

For an FM deviation up to 100 kHz an attenuation of 6 dB is recommended with R

= 470

19. The leakage current of the decoupling capacitor (2.2

F) should not exceed 1

20. For all S/N measurements the used vision IF modulator has to meet the following specifications:

a) Incidental phase modulation for black-to-white jump less than 0.5 degrees.

b) Picture-to-sound carrier ratio; PC/SC = 13 dB (transmitter).

c) Sound shelf of VIF SAW filter: minimum 20 dB.

21. Measurements taken with SAW filter K6256 (Siemens) for vision and sound IF (sound shelf: 20 dB). Input level

i SIF

= 10 mV (RMS), 27 kHz (54% FM deviation).

22. The PC/SC ratio at pins 1 and 2 is calculated as the addition of TV transmitter PC/SC ratio and SAW filter PC/SC

ratio. This PC/SC ratio is necessary to achieve the S/N (W) values as noted. A different PC/SC ratio will change
these values.

Table 1

Input frequencies and carrier ratios

DESCRIPTION

SYMBOL

B/G STANDARD

UNIT

Picture carrier

38.9

MHz

Sound carrier

33.4

MHz

Picture-to-sound carrier ratio

o rms

(

)

1 V p

(

)

2 2

-----------

iSC

iPC

------------ dB

(

)

6 dB

3 dB

---------------------------------------------------------------

2 2

-----------

iSC

iPC

------------ dB

(

)

iSC

iPC

------------

27 dB

1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

Fig.3 Typical VIF and tuner AGC characteristic.

andbook, full pagewidth

4.5

1.0

2.5

1.5

3.5

V28 (V)

MHA061

0.06

1.0

2.0

0.6

gain
(dB)

Ituner

(mA)

VIF input

(1,2)

(mV RMS)

(1)

(2)

(3)

(4)

(1) I

tuner

; R

TOP

= 22 k

(2) Gain.

(3) I

tuner

; R

TOP

= 11 k

(4) I

tuner

; R

TOP

= 0

Fig.4

Typical signal-to-noise ratio as a
function of IF input voltage.

handbook, halfpage

0.06

0.6

600

MED684

S/N

(dB)

Vi (VIF)(rms)(dB)

Vi (VIF)(rms)

(mV)

Fig.5 Input signal conditions.

handbook, halfpage

SC CC

BLUE

YELLOW

27 dB

13.2 dB

3.2 dB

27 dB

13.2 dB

10 dB

MED685 - 1

SC = sound carrier, with respect to sync level.

CC = chrominance carrier, with respect to sync level.

PC = picture carrier, with respect to sync level.

The sound carrier levels are taking into account
a sound shelf attenuation of 20 dB (SWIF G1962).

1995 Sep 05

Philips Semiconductors

Preliminary specification

Multistandard VIF-PLL and
FM-PLL demodulator

TDA9806

SOLDERING

Introduction

There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.

This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our

"IC Package Databook" (order code 9398 652 90011).

Soldering by dipping or by wave

The maximum permissible temperature of the solder is
260

C; solder at this temperature must not be in contact

with the joint for more than 5 seconds. The total contact
time of successive solder waves must not exceed
5 seconds.

The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (T

stg max

). If the

printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.

Repairing soldered joints

Apply a low voltage soldering iron (less than 24 V) to the
lead(s) of the package, below the seating plane or not
more than 2 mm above it. If the temperature of the
soldering iron bit is less than 300

C it may remain in

contact for up to 10 seconds. If the bit temperature is
between 300 and 400

C, contact may be up to 5 seconds.

DEFINITIONS

LIFE SUPPORT APPLICATIONS

These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.

Data sheet status

Objective specification

This data sheet contains target or goal specifications for product development.

Preliminary specification

This data sheet contains preliminary data; supplementary data may be published later.

Product specification

This data sheet contains final product specifications.

Limiting values

Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.

Application information

Where application information is given, it is advisory and does not form part of the specification.

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SCD41

All rights are reserved. Reproduction in whole or in part is prohibited without the
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The information presented in this document does not form part of any quotation
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other industrial or intellectual property rights.

Printed in The Netherlands

533061/1500/01/pp24

Date of release: 1995 Sep 05

Document order number:

9397 750 00307

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