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ICs for FM/AM Tuner
AN7289NFBQ
FM-FE+AM IC for car radio
s Overview
The AN7289NFBQ is an IC having FM-FE+AM functions for car radio. A tuner block of car radio can be constructed by using this IC and the AN7293NSC/NFBQ.
25
Unit : mm
24 17
16
0.3+0.10 -0.05
7.00.3 0.6250.100
* A less number of electrolytic capacitors is required (3 capacitors reduction compared with our conventional IC) * AM: Effective sensitivity is improved by 2 dB through ATC * AM: Strong-input characteristic is improved by 2-loopAGC function * The AN7289NSC of DIL package type is also available
32
0.10.1
0.15+0.10 -0.05 0.6250.100
1
8
0.8
s Features
9
7.00.3 9.20.4
(0.55)
LQFP032-P-0707
s Applications
* Car radios
s Block Diagram
FM-mix. in 21 FM-PIN D
24
23
22
20
19
18
VFOSC 25 VAOSC 26 GND2 27 28 Keyed-AGC in 29 AM-AFOUT 30 31 32
FM/AM SW FM AGC AM OSC FE OSC AM. S-meter AM ATC AM det. AM IF AGC AM SSC AM RF AGC AM IF amp. FM mix. FM IF amp. AM mix.
17
16 15 14 13 12 11 10 9
1
VCC 2
AM-IF count 3
AM-SD out 4
AM-S. meter 5
6
AM-IF out 7
GND1
8
1.40.2
9.20.4
1
AN7289NFBQ
s Pin Descriptions
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Description AM detection output VCC1 AM-IF counter output/DX/LO SW AM-SD output AM-signal meter output FM-IF output AM-IF output GND1 SSC AM-RF level detection AM-WAGC detection/DX setting AM-IF input AM-mix. output FM-IF input AM-RF gain control AM-mix. input Pin No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
ICs for FM/AM Tuner
Description FM-PIN diode driver AM-OSC coil pin FM-mix. output 2 FM-mix. output 1 FM-PIN diode driver FM-mix. input VCC2 /FM/AM SW FM-AGC output FM-OSC buffer output AM-OSC buffer output/FE-AGC sensitivity setting GND2 FM-OSC coil pin FM-keyed-AGC input AM-AM output/LO setting AM-ATC input AM-IF level detection
s Absolute Maximum Ratings
Parameter Supply voltage Supply current Power dissipation
*2 *1
Symbol VCC ICC PD Topr Tstg
Rating 9.1 56 343.3 -35 to +80 -55 to +125
Unit V mA mW C C
Operating ambient temperature Storage temperature
*1
Note) *1: Ta = 25C except power dissipation, operating ambient temperature and storage temperature. *2: Referring to "s Technical Information" for power dissipation at Ta = 80C, use the circuit under the conditions not exceeding the allowable limit value.
s Recommended Operating Range
Parameter Supply voltage Symbol VCC Range 7.2 to 9.0 Unit V
2
ICs for FM/AM Tuner
s Electrical Characteristics at Ta = 25C
* AM mode at VCC = 8.0 V, fIN2 = 1 MHz Parameter AM consumption current 1 AM consumption current 2 AM-AF output AM signal-to-noise ratio AM-AGC width AM-ATC operation Symbol amLT1 amLT2 amVO amSN amW Conditions Without input fIN2 = 1 MHz, VIN2 = 130 dB VIN2 = 74 dB, 400 Hz 30%, AM-AF output VIN2 = 74 dB, 400 Hz 30%, AM-AF output S/N VIN2 = 74 dB, 400 Hz 30%, AM-AF output -10 dB input change Min 28 33 105 48 56 3.5
AN7289NFBQ
Typ 36 41 135 52 60 6.5
Max 44 49 160 58 64 9.5
Unit mA mA mV dB dB dB
amATC (Output ratio [dB] of 400 Hz and 3 kHz when VIN2 = 18 dB) - (output ratio [dB] of 400 Hz and 3 kHz when VIN2 = 74 dB) 80%Mod., AM-AFOUT output
AM-distortion rate 1 AM-distortion rate 2 AM wide band AGC on input
amT1 amT2 amVW
VIN2 = 74 dB, 400 Hz 80%, AM-AF output distortion VIN2 = 130 dB, 400 Hz 80%, AM-AF output distortion fIN2 = 1.4 MHz, input when pin 15 voltage becomes below 3 V Without input VIN2 = 40 dB Without input VIN2 = 40 dB Without input Without input, pin 5 voltage VIN2 = 30 dB, pin 5 voltage VIN2 = 130 dB, pin 5 voltage AM-IF count output is over 120 mV VIN2 when f becomes 450 kHz2 kHz AM-IF count output is over 120 mV VIN2 when f becomes 450 kHz2 kHz
0.01 0.01 96 160 150 4.5 0.0 1 0.8 4.1 23 43
0.5 0.5 102 210 210 4.9 0.2 50 1.05 4.8 29 49
1.5 1.5 108 260 270 10 5.1 0.5 200 1.3 5.1 35 55
% % dB mV mV mV V V mV V V dB dB
AM local oscillation buffer output amVOS AM-IF count output 1 AM-IF count output 2 AM-SD output 1 AM-SD output 2 AM signal meter output 1 AM signal meter output 2 AM signal meter output 3 AM search sensitivity DX AM search sensitivity LO amIF1 amIF2 amSD1 amSD2 amVS1 amVS2 amVS3 amDX amLO
Note) FM tuning condition: Adjust VATU voltage so that VAOSC output frequency becomes 1 450 kHz500 Hz
3
AN7289NFBQ
s Electrical Characteristics at Ta = 25C (continued)
* FM mode at VCC = 8.0 V, fIN1 = 98 MHz Parameter FM local oscillation buffer output FM-IF output level FM-AGC sensitivity High-level FM-AGC voltage Low-level FM-AGC voltage FM consumption current Symbol fmVOS fmIF fmAGC fmVAH fmVAL fmIT Conditions fOSC = 108.7 MHz, without input VIN1 = 71 dB VIN1 level when V24 becomes 3 V VIN1 = 70 dB VIN1 = 82 dB Without input
ICs for FM/AM Tuner
Min 140 40 60 6.0 26
Typ 200 75 64 6.4 0.05 35
Max 260 110 68 6.8 0.5 44
Unit mV mV dB V V mA
Note) FM tuning condition: Adjust VFTU voltage so that VFOSC output frequency becomes 108.7 MHz10 kHz.
s Technical Information
* PD Ta curves of LQFP032-P-0707 P D Ta
1.600
1.400 1.388
1.200
Power dissipation PD (W)
Mounted on standard board (grass epoxy : 50 mm x 50 mm x t0.8 mm) Rth(j-a) = 90.0C/W
1.000
0.800
0.613 0.600 Independent IC without heat shink Rth(j-a) = 203.7C/W
0.400
0.200
0.000
0
25
50
75
100
125
150
Ambient temperature Ta (C)
4
ICs for FM/AM Tuner
s Application Circuit Example
AN7289NFBQ
FM-mix. in
FM-PIN D
AM-ANT AM-VT 8.2 H 10 k 100 k
AM
0.22 F
FM
4 pF 0.047 F
22 21 20 19 18 17
0.01 F
1 pF
0.022 F
3 pF
5 k
33 pF 28
3 pF
13
SFPS-450H
FE-VT 5.6 k Keyed-AGC in 10 k 3.9 k AMAFOUT
0.1 F 10 k 50 k
29 30 31 32
1 510 k VCC 2 3 4 5 6 7 8
12 11 10 k 10 9 100 F 0.022 F
0.047 F
100 k
GND1
12 k
0.1 F
0.1 F
0.1 F 0.022 F VCC 0.1 F 100 F
0.01 F
510 k 0.22 F
100 k
Seek on LO 5V
off DX/LO DX
AM-SD out AM-S. meter AM-IF out
AM-IF count
2SK435
GND2 27
MS3 14
10
VAOSC
0.022 F
26
15
0.022 F 1 F
2SC828A
VFOSC
1000 pF
25
16
3 pF
24
23
5

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