CXA1665AM/AM-S

E95826A63-ST

All Band TV Tuner IC (VHF-CATV-UHF)

Description

The CXA1665AM/AM-S is a single chip TV tuner

IC which performs as an oscillator, mixer for

VHF/CATV and UHF bands. An IF amplifier is also

provided.

This IC adopts a 16-pin SOP package in response

to the trend toward miniaturizing the tuner and

automatic IC mounting. This IC achieves a large

reduction of external parts in addition to

miniaturizing the tuner and increasing manufacturing

productivity, reliability and design efficiency.

Features

· On-chip oscillator and mixer for UHF band

· Low noise figure

· Reduced spurious interference

· Superior cross modulation distortion

· Stable oscillating characteristics

Absolute Maximum Ratings (Ta = 25°C)

· Supply voltage

· Storage temperature

Tstg 65 to +150 °C

· Allowable power dissipation P

980

(When mounted on a board)

Block Diagram and Pin Configuration (Top View)

Structure

Bipolar silicon monolithic IC

Applications

· CTV tuner

· CATV UP-DOWN converter

· FM detector for 2nd IF satellite broadcasts

Operation Conditions

· Supply voltage

9.0 ± 0.9

· Operating temperature

Topr 20 to +75

°C

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

16 pin SOP (Plastic)

UHF OSC

UHF MIX

VHF MIX

AMP

VHF OSC

VOSC C

UOSC B2

UOSC E2

UOSC E1

UOSC B1/SW

REG

UHF IN2

UHF IN1

VOSC B

GND

MIX OUT1

MIX OUT2

IF OUT

VHF IN1

VHF IN2

REG

CXA1665AM/AM-S

VHF IN1

VHF IN2

3.2

3.3

3.2

3.3

VHF input; normally a
decoupling capacitor is
connected at Pin 7 to
GND and Pin 8 is used
for input.

UHF IN1

UHF IN2

3.3

3.2

3.3

3.2

UHF input.
The balanced input to
Pins 9 and 10, or a
decoupling capacitor is
connected at Pin 10 to
GND and Pin 9 is used
for input.

REG

UOSC
B1/SW

UOSC E1

UOSC E2

UOSC B2

3.2

3.7

3.4

2.6

3.4

Regulator output.

UHF oscillator.
Pin 12 is used for both
U/V switches.

40k

20k

Pin
No.

Symbol

Typical

voltage (V)

Equivalent circuit

Description

CXA1665AM/AM-S

Electrical Characteristics

(See Electrical Characteristics Measurement Circuit. Ta = 25°C, V

= 9V)

Measured value for untuned inputs.

Noise figure is uncorrected for image.

Desired signal (f

) input level is 33dBm.

undesired signal (f

) is 100kHz at 30% AM.

The measurement value is undesired signal level, it measured with a spectrum analyzer at S/I = 46dB.

Design guaranteed items.

Condition

VHF operation; no signal

UHF operation; no signal

VHF operation; f

= 55MHz;

Input level 40dBm

VHF operation; f

= 360MHz;

Input level 40dBm

UHF operation; f

= 360MHz;

Input level 40dBm

UHF operation; f

= 800MHz;

Input level 40dBm

VHF operation; f

= 55MHz

VHF operation; f

= 360MHz

UHF operation; f

= 360MHz

UHF operation; f

= 800MHz

VHF operation; f

= 55MHz, f

= ±12MHz

VHF operation; f

= 360MHz, f

= ±12MHz

UHF operation; f

= 360MHz, f

= ±12MHz

UHF operation; f

= 800MHz, f

= ±12MHz

load

VHF operation; f

OSC

= 100MHz

frequency drift for the time from 3s to
3min after switch ON

VHF operation; f

OSC

= 405MHz

frequency drift for the time from 3s to
3min after switch ON

UHF operation; f

OSC

= 405MHz

frequency drift for the time from 3s to
3min after switch ON

UHF operation; f

OSC

= 845MHz

frequency drift for the time from 3s to
3min after switch ON

VHF operation; f

OSC

= 100MHz

frequency shift when V

+ 9V changes ±5%

VHF operation; f

OSC

= 405MHz

frequency shift when V

+ 9V changes ±5%

UHF operation; f

OSC

= 405MHz

frequency shift when V

+ 9V changes ±5%

UHF operation; f

OSC

= 845MHz

frequency shift when V

+ 9V changes ±5%

Min.

Typ.

100

+11

Max.

±300

±500

±200

±250

Unit

dBµ

dBm

kHz

Item

Circuit current

Conversion
gain

Noise
figure

1% cross
modulation

Max. output
power

Switch ON
drift

+B supply
voltage drift

Symbol

CG1

CG2

CG3

CG4

NF1

NF2

NF3

NF4

CM1

CM2

CM3

CM4

Pomax
(sat)

fsw1

fsw2

fsw3

fsw4

fst1

fst2

fst3

fst4

CXA1665AM/AM-S

Electrical Characteristics Measurement Circuit

VOSC C

UOSC B2

UOSC E2

UOSC E1

UOSC B1/SW

REG

UHF IN2

UHF IN1

VOSC B

GND

MIX OUT1

MIX OUT2

IF OUT

VHF IN1

VHF IN2

4.7n

51k

68p

(RH)

0.5p

(UK)

1T363

(UK)

51k

SW1

+9V

1T362

51k

16p

68p

10T

IF out

+9V

VHF in

UHF in

10k

20k

SW2

ON:UHF

OFF:VHF

0.5p

(UK)

1T363

51k

0.5p

(UK)

51k

27p

(RH)

51k

(SL)

27p

(RH)

Table 1. Inductance constant

Wire

diameter

0.5

+9V

Coil

diameter

3.2

3.8

Number

of windings

5.5T

2.5T

1.5T

CXA1665AM/AM-S

Description of Operation (See Electrical Characteristics Test Circuit.)

(1) VHF oscillator circuit

The differential oscillator circuit with an output at Pin 16 and an input at Pin 1.

Connect an LC resonance circuit comprising a varicap diode to Pin 16 through a coupling capacitor. The

positive feedback from the resonance circuit is applied to Pin 1 through a feedback capacitor to execute

oscillation. Note that if a parasitic capacitance across Pins 1 and 16 is too large, it may cause undesired

oscillation.

(2) VHF mixer circuit

This is a double-balanced mixer having small leakage of local oscillation signal. The RF signal is input to Pins

7 and 8. In normal use, the signal is input to one pin while the other pin is connected to GND by decoupling

capacitor. The RF signal is converted to IF with the signal supplied from oscillator. The converted RF is sent to

the IF amplifier and output to Pins 3 and 4 simultaneously.

(3) UHF oscillator circuit

UHF oscillator is formed from two collector-grounded Colpitts oscillator, and oscillation is provided at the

differential input through an LC resonator circuit including a varicap diode.

The Pin 12 also functions as UHF/VHF switch pin.

(4) UHF mixer circuit

This is the double-balanced mixer like the VHF mixer. The RF signal is input to Pins 9 and 10. There is a

balanced differential input from pre-stage double tune circuit, or an unbalanced input to Pin 9 with the capacitor

connected at Pin 10 to GND. Balanced input achieves better NF rather than unbalanced input.

Otherwise, the conditions and usage are the same as those for the VHF mixer circuit.

(5) IF amplifier circuit

The mixer output signal is amplified by the IF amplifier and output to Pin 5. The output impedance is about

(6) UHF/VHF switch circuit

UHF/VHF mode is selected by the DC voltage at Pin 12. UHF operation is chosen by inputting 9V through a

20k

resistor, and VHF operation by inputting 0V. If the UHF switch voltage is 12V not 9V, adjust the

resistance to approximately 30k

so that the DC voltage becomes almost equal between Pins 12 and 15. Be

sure to connect a resistor for discharging (approx. 10k

) if OPEN not 0V is chosen for the VHF switch voltage.

Note on Usage

Care should be taken such as grounding in placing external parts because high frequencies are present.

Adjust accordingly to prevent heat problems with special care such as the GND pattern for heat dissipation at

the portion for IC mount where heat dissipations accumulate.

CXA1665AM/AM-S

Example of Representative Characteristics

Conversion gain vs. Reception frequency (Untuned input)

CG -- Conversion gain [dB]

Reception frequency [MHz]

100

VHF

UHF

= 45MH

200 300 400 500 600 700 800 900

Noise figure vs. Reception frequency

(Untuned input, in DSB)

NF -- Noise figure [dB]

Reception frequency [MHz]

100

VHF

UHF

= 45MH

200 300 400 500 600 700 800 900

Circuit current vs. Supply voltage

-- Circuit current [mA]

-- Supply voltage [V]

VHF

UHF

I/O characteristics (Untuned input)

IF output level [dBm]

RF input level [dBm]

+10

= 45MH

= 100MH

(VHF)

CM -- Cross modulation [dBµ

]

120

Reception frequency [MHz]

100

200 300 400 500 600 700 800 900

= f

+ 12MH

= f

12MH

100

Next adjacent cross modulation vs. Reception frequency

(Untuned input)

= 45MHz

Interference signal: 100kHz 30% AM

CXA1665AM/AM-S

Package Outline

Unit: mm

CXA1665AM

PACKAGE STRUCTURE

PACKAGE MATERIAL

LEAD TREATMENT

LEAD MATERIAL

PACKAGE WEIGHT

SONY CODE

EIAJ CODE

JEDEC CODE

SOP-16P-L01

SOP016-P-0300-A

COPPER ALLOY

SOLDER PLATING

EPOXY RESIN

16PIN SOP (PLASTIC) 300mil

9.9 0.1

+ 0.4

1.27

0.45 ± 0.1

5.3 0.1

+ 0.3

7.9 ±

0.4

6.9

1.85 0.15

+ 0.4

0.5 ±

0.2

0.2 0.05

+ 0.1

0.1 0.05

+ 0.2

0.2g

0.15

± 0.12

CXA1665AM-S

SONY CODE

EIAJ CODE

JEDEC CODE

SOP-16P-L04

SOP016-P-0300

PACKAGE MATERIAL

LEAD TREATMENT

LEAD MATERIAL

PACKAGE WEIGHT

EPOXY RESIN

SOLDER/PALLADIUM

COPPER ALLOY

PACKAGE STRUCTURE

PLATING

0.1g

16PIN SOP(PLASTIC)

0.1

0° to 10°

DETAIL A

NOTE: "

" Dimensions do not include mold protrusion.

0.12 M

9.7 ± 0.1

5.6 ±

0.1

0.4 0.05

+ 0.1

1.27

0.15 0.02

+ 0.05

1.25 0.1

+ 0.2

0.5 ±

0.2

0.1 ± 0.1

7.6 ±

0.2

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