1.
General description
The TEF6721HL is a single chip car radio tuner for AM, FM standard, FM In-Band
On-Channel Digital Audio Broadcast (IBOC DAB) and weather band providing combined
AM and FM gain controlled differential Intermediate Frequency (IF) output for the
SAF7730H including the following functions:
AM up-conversion tuner to an IF frequency of 10.7 MHz for Long Wave (LW)/Medium
Wave (MW)/Short Wave (SW) (31 m, 41 m and 49 m bands)
FM single conversion tuner to an IF frequency of 10.7 MHz with integrated image
rejection for US FM, Europe FM, Japan FM, East Europe FM and weather band
reception; all bands can be selected using high side or low side Local Oscillator (LO)
injection
Tuning system includes Voltage-Controlled Oscillator (VCO), crystal oscillator and
Phase-Locked Loop (PLL) synthesizer on one chip.
2.
Features
s
FM mixer for conversion of FM Radio Frequency (RF) (64 MHz to 108 MHz and US
weather band) to an IF of 10.7 MHz; the mixer provides inherent image rejection and
can be switched from low injection to high injection Local Oscillator (LO) via the
I
2
C-bus; two different mixer conversion gains can be selected via the I
2
C-bus
s
Automatic Gain Control (AGC) PIN diode drive circuit for FM RF AGC; AGC detection
at FM mixer input and IF AGC amplifier input; AGC threshold for detection at FM mixer
input is a programmable and keyed function switchable via the I
2
C-bus; the AGC PIN
diode drive can be activated via the I
2
C-bus as a local function for search tuning; in
AM mode the AGC PIN diode drive can be activated via the I
2
C-bus if required
s
Digital alignment circuit for bus controlled matching of oscillator tuning voltage to FM
antenna tank circuit tuning voltage
s
Buffer output for weather band flag
s
Combined AM and FM IF AGC amplifier with high dynamic input range; one of the four
gain settings is selected automatically via two control signals from IF Digital Signal
Processor (DSP); combined differential AM and FM IF output signal to
analog-to-digital converter of IF DSP
s
AM mixer for conversion of AM RF to AM IF 10.7 MHz
s
AM RF PIN diode drive circuit and RF Junction Field Effect Transistor (JFET)
conductance control by AGC cascode drive circuit; AGC threshold detection at AM
mixer and IF AGC input; threshold for detection at AM mixer is programmable via the
I
2
C-bus
s
AM and FM RF AGC monitor output intended for gain control of active antennas
TEF6721HL
Car radio tuner front-end for digital IF
Rev. 03 -- 19 July 2005
Product data sheet
9397 750 15042
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 -- 19 July 2005
2 of 45
Philips Semiconductors
TEF6721HL
Car radio tuner front-end for digital IF
s
Inductor Capacitor (LC) tuner oscillator providing mixer frequencies for FM and AM
mixers
s
Crystal oscillator providing reference frequencies for synthesizer PLL and timing for
Alternative Frequency (AF) updating
s
Optional crystal oscillator frequency pulling possibility via I
2
C-bus
s
Fast synthesizer PLL tuning system with local control for inaudible AF updating
s
Timing function for AF updating algorithm and control signal output for interfacing with
IF DSP
s
Three hardware programmable I
2
C-bus addresses; pin BUSENABLE; two software
controlled flag outputs
s
Several test modes for fast Integrated Circuit (IC) tests.
3.
Quick reference data
Table 1:
Quick reference data
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
V
DDA(n)
analog supply voltages
1 to 5
8
8.5
9
V
V
DDA6
analog supply voltage 6
4.75
5
5.25
V
V
DDD
digital supply voltage
4.75
5
5.25
V
I
DDA(n)
sum of analog supply
currents 1 to 5
FM Japan mode
35
44
55
mA
AM mode
28
38
48
mA
I
DDA6
analog supply current 6 FM Japan mode
2.2
3.2
4.3
mA
AM mode
10
14
18
mA
I
DDD
digital supply current
FM Japan mode
23
30
39
mA
AM mode
17
23
30
mA
f
AM(ant)
AM input frequency
LW
0.144 -
0.288
MHz
MW
0.522 -
1.710
MHz
SW
5.73
-
9.99
MHz
f
FM(ant)
FM input frequency
64
-
108
MHz
f
FM(WB)(ant)
FM weather band input
frequency
162.4 -
162.55 MHz
T
amb
ambient temperature
-
40
-
+85
C
AM overall system parameters (based on 15 pF/60 pF dummy aerial; m = 0.3; 2.5 kHz audio
bandwidth in IF DSP; voltages in RMS value at input of dummy aerial); see
Figure 9
V
i(RF)(IFAGC)
RF input voltage for
start of IF AGC
first step
-
5.5
-
mV
second step
-
11
-
mV
third step
-
22
-
mV
V
i(RF)(RFAGC)
RF input voltage for
start of RF AGC
in-band; m = 0
-
31
-
mV
wideband; m = 0
AGC[1:0] = 00
-
92
-
mV
AGC[1:0] = 01
-
126
-
mV
AGC[1:0] = 10
-
168
-
mV
AGC[1:0] = 11
-
210
-
mV
26dB
sensitivity
f = 990 kHz
-
42
-
V
9397 750 15042
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 -- 19 July 2005
3 of 45
Philips Semiconductors
TEF6721HL
Car radio tuner front-end for digital IF
4.
Ordering information
IP3
3rd-order input
intercept point
f
undesired
= 50 kHz
-
130
-
dB
V
f
undesired
= 300 kHz
-
135
-
dB
V
IP2
2nd-order input
intercept point
-
140
-
dB
V
FM overall system parameters (based on 75
dummy aerial;
f = 22.5 kHz; de-emphasis is
50
s in IF DSP; voltages in RMS value at input of dummy aerial); see
Figure 9
V
i(RF)(IFAGC)
RF input voltage for
start of IF AGC
first step
-
0.57
-
mV
second step
-
1.1
-
mV
third step
-
2.3
-
mV
V
i(RF)(RFAGC)
RF input voltage for
start of wideband AGC
in-band
-
4.5
-
mV
wideband
AGC[1:0] = 11
-
8
-
mV
AGC[1:0] = 10
-
12
-
mV
AGC[1:0] = 01
-
17
-
mV
AGC[1:0] = 00
-
21
-
mV
26dB
sensitivity
f = 97 MHz
-
1.4
-
V
IP3
3rd-order input
intercept point
f
undesired
= 400 kHz
-
117
-
dB
V
Table 1:
Quick reference data
...continued
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Table 2:
Ordering information
Type number
Package
Name
Description
Version
TEF6721HL
LQFP64
plastic low profile quad flat package; 64 leads;
body 10
10
1.4 mm
SOT314-2
9397 750 15042
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 -- 19 July 2005
4 of 45
Philips Semiconductors
TEF6721HL
Car radio tuner front-end for digital IF
5.
Block diagram
Fig 1.
Block diagram of TEF6721HL
AM
MIXER
AM
AGC
IF
AGC
FM
AGC
FM
I/Q MIXER
WX
BUFFER
XTAL
OSC
POWER
SUPPLY
I
2
C-
BUS
90
:1 / :2 / :3
N1
:5 / :10
N2
RF AGC
MONITOR
VCO
18
17
16
15
11
13
9
12
10
14
7
6
5
4
3
2
19
20
21
22
23
24
28
26
32
33
27
29
30
31
41
42
43
44
45
46
49
50
53
54
55
56
61
57
58
59
CRYSTAL
DAA
60
51
52
63
64
1, 8,
25, 62
TEF6721HL
mdb410
SEQUENTIAL
CIRCUIT FOR
AF UPDATING
TUNING
SYSTEM
ANTENNA
DAA
37
36
34
35
47
48
38
39
40
IFOUT2
VAMCAS
VAMCASFB
IAMAGC
TAFAMAGC
TRFAMAGC
AGCBUF
FMMIXOUT1
FMMIXOUT2
VREFFMMIX
FMMIXIN1
RFGND
IFMAGC
FMMIXIN2
TFMAGC
KAGC
DAAOUT
KAGCADJ
IFOUT1
IFAGCMSB
IFAGCLSB
XTALGND
XTAL2
XTAL1
VCOGND
OSCFDB
OSCTNK
V
DDA4
IREF
V
DDA6
GND
V
DDA5
VDAC
SWPORT1
i.c.
AMMIXDEC
AMMIXOUT2
WBFLAG
IFGND
FMIFIN
V
DDA1
AMMIXOUT1
IFAGCBIAS
IFDEC
AMIFIN
V
DDA2
AMMIXIN
DAATD
AFSAMPLE
VTUNE
V
DDA3
V
DDD
BUSENABLE
DAAIN
AFHOLD
CPOUT
ADDRSEL
DGND
SWPORT2
SCL
SDA
9397 750 15042
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 -- 19 July 2005
5 of 45
Philips Semiconductors
TEF6721HL
Car radio tuner front-end for digital IF
6.
Pinning information
6.1 Pinning
6.2 Pin description
Fig 2.
Pin configuration for LQFP64
TEF6721HL
i.c.
AFHOLD
V
DDA1
AFSAMPLE
AMIFIN
BUSENABLE
FMIFIN
ADDRSEL
IFDEC
V
DDA4
IFGND
OSCTNK
IFAGCBIAS
OSCFDB
i.c.
VCOGND
FMMIXOUT1
V
DDD
AMMIXOUT1
DGND
FMMIXOUT2
V
DDA3
AMMIXOUT2
CPOUT
V
DDA2
VTUNE
SWPORT1
DAAIN
AMMIXDEC
DAATD
AMMIXIN
KAGC
VAMCAS
IFOUT2
VAMCASFB
IFOUT1
IAMAGC
i.c.
TAFAMAGC
IREF
TRFAMAGC
VDAC
VREFFMMIX
XTALGND
FMMIXIN1
XTAL2
RFGND
XTAL1
i.c.
V
DD
A6
FMMIXIN2
GND
WBFLAG
V
DD
A5
IFMAGC
SWPORT2
AGCBUF
IFAGCMSB
DAAOUT
IFAGCLSB
KAGCADJ
SCL
TFMAGC
SDA
001aac646
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
Table 3:
Pin description
Symbol
Pin
Description
i.c.
1
internally connected for test purposes; leave open-circuit
V
DDA1
2
analog supply voltage 1 (8.5 V) for IF AGC amplifier
AMIFIN
3
IF AGC amplifier AM input (10.7 MHz)
FMIFIN
4
IF AGC amplifier FM input (10.7 MHz)
IFDEC
5
IF AGC amplifier AM and FM decoupling
IFGND
6
IF AGC amplifier ground
IFAGCBIAS
7
bias voltage for IF AGC amplifier decoupling
i.c.
8
internally connected for test purposes; connect to ground
FMMIXOUT1
9
FM mixer IF output 1 (10.7 MHz)
AMMIXOUT1
10
AM mixer IF output 1 (10.7 MHz)
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