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ICs for FM/AM Tuner
AN7293NFBQ
FM-IF, NC, MPX IC for Car Radio
I Overview
The AN7293NFBQ is an IC having FM-IF, NC and MPX function for car radio. A tuner block of car radio can be constructed by this IC and the AN7289NFBQ/NSC.
24 17 25 16
Unit: mm
0.3+0.10 -0.05
7.00.3 0.6250.100
I Features
* A less number of external components is required (8 components reduction compared with our conventional IC) * Neighbering-station interference characteristics improvement by band-ATC function * Band-mute on/off function * DIL package product (the AN7293NSC) is also available
32 9
0.8
0.15+0.10 -0.05 0.6250.100
1
8
0.10.1
7.00.3
(0.55)
I Applications
* Car radios
9.20.4
LQFP032-P-0707
I Block Diagram
ST-Ind. Mono: high 18 Stereo: low Mute-Adj.
21 AFC
22 V CC
24
23
20
SD-Adj.
19
GND VREF
25 26 27 IF det. VREF IF limiter Mute PNL Noise det. Band-det. SD IF-counter
17
16 15 14 13 12 Level det. Multipath det. VCO PLL Demod. Pilot det. 11 10 9 VBAND
IF-In 28 29 VS Out 30 31 32
1
2
3
4
5
6
7
Forced mono
ATC-Adj.
SEP-Adj.
R-Out
L-Out
8
1.40.2
9.20.4
1
AN7293NFBQ
I Pin Description
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Description ASC adjustment/forced monaural ATC adjustment Separation adjustment ATC low-pass filter R-ch. output L-ch. output Mute voltage Pilot detection low-pass filter PLL low-pass filter PLL low-pass filter VCO Pilot cancel control low-pass filter Band signal output/band mute SW PNL low-pass filter PNL AGC PNL 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 Detection output PNL output hold SD/FM-IF counter output/stereo indicator SD sensitivity adjustment AFC voltage VCC FM detection Soft mute adjustment GND VREF IF bypass IF input Control voltage adjustment Control voltage Multi-path noise input Multi-path detection
I Absolute Maximum Ratings
Parameter Supply voltage Supply current Power dissipation
*2 *1
Symbol VCC ICC PD Topr Tstg
Rating 9.1 45 343.3 -30 to +80 -55 to +125
Unit V mA mW C C
Operating ambient temperature Storage temperature
*1
Note) *1: Except for the power dissipation, operating ambient temperature, and storage temperature, all ratings are for Ta = 25C. *2: Ta = 80C
I Recommended Operating Range
Parameter Supply voltage Symbol VCC Range 7.2 to 9.0 Unit V
2
ICs for FM/AM Tuner
I Electrical Characteristics at Ta = 25C
Unless otherwise specified, VCC = 8V, VIN1 is f = 10.70 MHz, Mod. = 1 kHz, 30% FM modulation stereo input is L + R = 90% VP = 10%
AN7293NFBQ
Parameter Control voltage (1) Control voltage (2) Control voltage (3) Control voltage (4) Control voltage (5) Control voltage (6) Output level L-channel Output level R-channel Channel balance Residual pilot voltage Stereo lamp light up level Separation L-channel Separation R-channel Capture range Counter output level (1) Counter output level (2) Monaural THD (L) Monaural THD (R) Stereo THD (L) Stereo THD (R) PNL-AGC voltage (1) PNL-AGC voltage (2) Residual noise voltage
Symbol VC1 VC2 VC3 VC4 VC5 VC6 VOL VOR CB VPC
Conditions Without signal input, pin 30 DC voltage VIN1 = 40 dB, pin 30 DC voltage VIN1 = 70 dB, pin 30 DC voltage VIN1 = 100 dB, pin 30 DC voltage VC5 = VC3 - VC2 VC6 = VC4 - VC3 VIN1 = 70 dB, pin 6 AC voltage VIN1 = 70 dB, pin 5 AC voltage CB = 20*log (VOL/VOR) VP = 10% modulation, VIN1 = 70 dB, pin 18 output voltage
Min 0.0 0.6 2.4 4.5 1.8 1.85 85 85 -1.0 1.3 25 25 0.4 135 0 1.2 0.1 0.0
Typ 0.3 1.3 3.1 5.3 2.0 2.05 105 105 0 4 4.0 33 33 0.7 155 2 0.1 0.1 0.1 0.1 1.4 0.35 0.2
Max 0.9 1.6 3.8 5.8 2.2 2.25 125 125 1.0 14 6.3 175 5 0.3 0.3 0.3 0.3 1.7 0.60 0.7
Unit V V V V V V mV[rms] mV[rms] dB mV[rms] % dB dB % mV[rms] mV[rms] % % % % V V mV[rms]
LAMPON 19 kHz modulation, Modulation factor at which pin 19 becomes under 1 V SepL SepR CR VIF1 VIF2 THDL THDR THDSTL THDSTR VAGC1 VAGC2 VNR L+R = 90%, VP = 10% Larger separation value after changing over pin 3 external resistor Modulation at VP = 6.5% Referred to 19 kHz VIN1 = 100 dB, V20 = 2 V pin 19 output voltage VIN1 = 100 dB, V20 = 5 V pin 19 output voltage VIN2 monaural input, 500 mV[0-p] 1 kHz, L-ch. output distortion factor VIN2 monaural input, 500 mV[0-p] 1 kHz, R-ch. output distortion factor VIN2 stereo input, 500 mV[0-p] 1 kHz, L-ch. output distortion factor VIN2 stereo input, 500 mV[0-p] 1 kHz, R-ch. output distortion factor VIN2 = Without input pin 15 DC voltage VIN2 = 100 mV, f = 100 kHz input Difference from VAGC1 VIN2 = (pulse width 10 s, 1 V[p-p] 1 kHz) L-ch. output
3
AN7293NFBQ
I Electrical Characteristics at Ta = 25C (continued)
Unless otherwise specified, VCC = 8V, VIN1 is f = 10.70 MHz, Mod. = 1 kHz, 30% FM modulation stereo input is L + R = 90% VP = 10%
ICs for FM/AM Tuner
Parameter SD sensitivity SD bandwidth Supply current Limiting sensitivity ATC Gate pulse width
Symbol SDS SDW ITOT VLIM VATC PW
Conditions VIN1 when V20 = 2 V, V19 > 2 V VIN bandwidth when V24 = 2 V, and V19 > 2 V, VIN1 = 100 dB Without input VIN1 input level when pin 5 AC voltage drops by 3 dB L-ch. output ratio when V2 = 2 V and 0 V VIN2 = (pulse width 1 s, 0.3 V[p-p] 1 kHz) pin 18 output pulse width
Min 70 100 30 24 7 16
Typ 80 130 37 32 11 23
Max 90 160 44 38 15 30
Unit dB kHz mA dB dB s
* Design reference data
Note) The following characteristics are the reference values for design and not guaranteed values.
Parameter Stereo lamp turn off level
Symbol
Conditions
Min 2.0
Typ 6.0
Max 10.0
Unit dB
LAMPOFF Ratio between the modulation factor when pin 19 becomes 2 V or more and LAMPON VAFC Without signal input, DC potential difference between pin 21 and pin 26.
AFC offset voltage
- 0.1
0.0
0.1
V
4
ICs for FM/AM Tuner
I Application circuit Example
ST-Ind. Mono: high Stereo: low
AN7293NFBQ
AFC
0.01 F
SD-Adj.
IF-Counter SD 470 pF VCC 100 F
50 k
100 k
0.1F 10 k
Mute-Adj.
100 k
Seek/Lamp ST-Lamp: high (4.5 V or more) Seek: Open
VCC
2.2 k
18 0.01 F
180 pF
680 pF
0.1 F 0.1 F 16
24
23
22
21
20
19
GND 25 VREF 0.1 F 27 IF-In Ms 3 Ms 3 0.022 F 28 IF limiter Band-det. SD IF-counter 26 IF det. VREF Mute PNL Noise det.
17
330 k 15 14 13 12 0.47 F 0.047 F VBAND 1 F 912kHz
VS Out
50 k 29 VS-Adj. 0.01 F 30
330 k
100 k
Level det. Multipath det.
VCO PLL Demod. Pilot det.
11
31 32
10 0.1 F 9 10 k 0.1 F
1000pF 0.1 F
1
2
0.1 F 3 10 k 4
5
6
7 0.1 F
8 0.1 F
0.022 F
0.01 F
50 k
ASC-Adj.
ATC-Adj.
Forced mono
SEP-Adj.
R-Out
L-Out
0.022 F
50 k
5
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(1) An export permit needs to be obtained from the competent authorities of the Japanese Government if any of the products or technologies described in this material and controlled under the "Foreign Exchange and Foreign Trade Law" is to be exported or taken out of Japan. (2) The technical information described in this material is limited to showing representative characteristics and applied circuit examples of the products. It does not constitute the warranting of industrial property, the granting of relative rights, or the granting of any license. (3) The products described in this material are intended to be used for standard applications or general electronic equipment (such as office equipment, communications equipment, measuring instruments and household appliances). Consult our sales staff in advance for information on the following applications: * Special applications (such as for airplanes, aerospace, automobiles, traffic control equipment, combustion equipment, life support systems and safety devices) in which exceptional quality and reliability are required, or if the failure or malfunction of the products may directly jeopardize life or harm the human body. * Any applications other than the standard applications intended. (4) The products and product specifications described in this material are subject to change without notice for reasons of modification and/or improvement. At the final stage of your design, purchasing, or use of the products, therefore, ask for the most up-to-date Product Standards in advance to make sure that the latest specifications satisfy your requirements. (5) When designing your equipment, comply with the guaranteed values, in particular those of maximum rating, the range of operating power supply voltage and heat radiation characteristics. Otherwise, we will not be liable for any defect which may arise later in your equipment. Even when the products are used within the guaranteed values, redundant design is recommended, so that such equipment may not violate relevant laws or regulations because of the function of our products. (6) When using products for which dry packing is required, observe the conditions (including shelf life and after-unpacking standby time) agreed upon when specification sheets are individually exchanged. (7) No part of this material may be reprinted or reproduced by any means without written permission from our company.
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2001 MAR

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