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ICs for TV
AN5285K
Sound level automatic gain control IC
s Overview
The AN5285K is a stereo automatic volume control IC for reducing a difference in volume between broadcasting stations and between programs. It is a kind of AGC circuit and reduces a sudden change in sound signal amplitude by using a proper time constant.
10
0.5 1.1 18.240.3
Unit: mm
s Features
* Sound level AGC function by VCA gain control * Prevention of S/N ratio degradation by reducing VCA gain at no signal (typ. 20 mV[rms] or less) * AGC function can be switched on and off externally. * Operating point of VCA gain lowering is adjustable by means of external resistor. * Usable for stereo sound system (also usable for monaural sound system) by two VCAs
6.00.3 (12.0)
1
0.25 -0.05 1.650.25 1.10.25
3.50.25
+0.1
1.778
SSIP010-P-0000
s Applications
* Televisions and video sets
4V CC
s Block Diagram
3 LOUT LIN 1 50 k CTL 7 VCA Level sensor 1 SW CTL Level sensor 1 RIN 10 50 k Level sensor 2 V/l reg. VCA
8 ROUT
LS2 9
LS1 2
VREF 5
GND 6
3.00.3
1
AN5285K
s Absolute Maximum Ratings
Parameter Supply voltage Supply current Power dissipation Operating ambient temperature * Storage temperature * Symbol VCC ICC PD Topr Tstg Rating 13.0 30 390 -20 to +75 -55 to +150
ICs for TV
Unit V mA mW C C
Note) * : Except for the operating ambient temperature, and storage temperature, all ratings are for Ta = 25C.
s Recommended Operating Range
Parameter Supply voltage Symbol VCC Range 8.5 to 12.5 Unit V
s Electrical Characteristics at VCC = 12 V, fIN = 1 kHz, Ta = 25C
Parameter Supply current * Input and output level 1 * Input and output level 2 * Input and output level 3 * Input and output level 4 * Input and output level 5 Input and output level 6 Total harmonic distortion * Noise level * Maximum input level
*
Symbol ICC V1 V2 V3 V4 V5 V6 THD Vn Vmax GT VSW CB
*
Conditions Without input signal VIN = 1 mV[rms] VIN = 50 mV[rms] VIN = 200 mV[rms] VIN = 1 V[rms] VIN = 100 mV[rms], Vctl = 2.5 V VIN = 300 mV[rms], Vctl = 4.5 V VIN = 200 mV[rms] No input signal (with IHF-A) Input level at THD = 1% VIN = 2 V[rms], AGC off VIN = 1 V[rms], Vctl = 1.2 V VIN = 200 mV[rms] VIN = 200 mV[rms] Level difference of fIN = 1 kHz/20 kHz VIN = 200 mV[rms], AGC off
Min 5 0.7 80 150 200 50 230 2.8 60 890 -1.0 -1.0 175
Typ 10 1.0 110 200 280 100 300 0.1
Max 15 1.4 140 250 360 150 370 0.5 100
Unit mA mV[rms] mV[rms] mV[rms] mV[rms] mV[rms] mV[rms] % V[rms] V[rms] dB
Crosstalk between channels AGC OFF voltage Channel balance
*
1 000 1 130 mV[rms] 0 0 200 1.0 1.0 225 dB dB mV[rms]
Frequency characteristics Input and output level 7
Note) * : Vctl = 3.5 V.
FC V7
2
ICs for TV
s Terminal Equivalent Circuits
Pin No. 1 Equivalent circuit Description LIN: Left side input pin
200
AN5285K
Voltage 6V
1
50 k 1/2 VCC
2
Level 1
Level 2
CTL
LSI: AGC level sensor 1 and 2
0.5 V to 1.5 V
430
20 k
2
3
143
LOUT: Left side output pin
6V
3
143
4 5
50 k 5 200
VCC : VCC pin VREF : Reference voltage stability
6V
50 k
6
GND: GND pin
3
AN5285K
s Terminal Equivalent Circuits (continued)
Pin No. 7
96 k 20 k 20 k 200 40 k 7
ICs for TV
Equivalent circuit
Description CTL: AGC on/off changeover AGC off at 1.2 V or lower
Voltage
8
143
ROUT: Right side output pin
6V
8
143
9
LS2: AGC level sensor 2
18 k 900 1/2 VCC 9
6V
250
10
RIN: Right side input pin
200 10 50 k
6V
1/2 VCC
4
ICs for TV
s Application Circuit Example
VCC
AN5285K
4
4.7 F LIN
3 1 VCA 50 k Level sensor 1 SW CTL Level sensor 1
4.7 F
LOUT
24 k 10 k
CTL 7
4.7 F RIN
10 50 k
VCA
8
4.7 F
ROUT
Level sensor 2 V/l Reg.
LS2 9
LS1 2
VREF 5
2.2 M
4.7 F
10 F
10 F
GND 6
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.
Please read the following notes before using the datasheets
A. These materials are intended as a reference to assist customers with the selection of Panasonic semiconductor products best suited to their applications. Due to modification or other reasons, any information contained in this material, such as available product types, technical data, and so on, is subject to change without notice. Customers are advised to contact our semiconductor sales office and obtain the latest information before starting precise technical research and/or purchasing activities. B. Panasonic is endeavoring to continually improve the quality and reliability of these materials but there is always the possibility that further rectifications will be required in the future. Therefore, Panasonic will not assume any liability for any damages arising from any errors etc. that may appear in this material. C. These materials are solely intended for a customer's individual use. Therefore, without the prior written approval of Panasonic, any other use such as reproducing, selling, or distributing this material to a third party, via the Internet or in any other way, is prohibited.
2001 MAR

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