BD3702FV Datasheet – Sound Processor for car audio – Rohm

Part Number: BD3702FV

Function : Sound Processor for car audio

Package: SSOP-B28 Type

Manufacturer: Rohm

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BD3702FV Sound Processor
Features

1. Reduce switching noise of input gain control, mute, main volume, fader volume, bass, middle, treble, loudness, mixing by using advanced switch circuit [Possible to control all steps]

2. Built-in ground isolation amplifier inputs, ideal for external stereo input.

3. Built-in differential input selector that can make various combination of single-ended / differential input.

4. Built-in input gain controller reduce switching noise for volume of a portable audio input.

5. Decrease the number of external components by built-in 3-band equalizer filter, LPF for subwoofer, loudness filter. And, possible to control Q, Gv, fo of 3-band equalizer and fc of LPF, fo, Gv of loudness by I2C BUS control freely.

6. It is possible for the bass, middle, treble to the gain adjustment quantity of ±20dB and 1 dB step gain adjustment.

7. It is equipped with output terminals of Subwoofer. Moreover, the stereo signal of the front and rear also can be output by the I2C BUS control.

8. Built-in mixing input and mixing attenuation.

 

Pinout

BD3702FV datasheet pinout

 

 

BD3702FV Datasheet


 

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TDA7421N Datasheet PDF – AM/FM Tuner for Car Radio – ST

Part Number: TDA7421N

Function: HIGH PERFORMANCE FRONT-END IC FOR AM/FM RECEIVER

Package: TQFP64

Manufacturer: STMicroelectronics

Image :

TDA7421N datasheet

 

Description

The TDA7421N is a high-performance tuner circuit which integrates AM and FM sections, PLL frequency sinthesizer and IF counter on a single chip.

Use of BICMOS technology allows the implementation of tuning functions with a minimum of external components.Value spread of external components can be fully compensated by means of on-chip electrical adjustment controlled by external µP.

Features

1. HIGH PERFORMANCE FRONT-END IC FOR AM/FM RECEIVERS
2. FULLY INTEGRATED HIGH-SPEED PLL FOR OPTIMIZED RDS Applications
3. FM MPX/AM AUDIO OUTPUT, 450kHz AM IF OUTPUT FOR STEREO AM Applications
4. AM DOUBLE CONVERSION ARCHITECTURE
5. AM/FM STATION DETECTOR AND DIGITAL IF-COUNTER

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AM Test Circuit

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Other data sheets are available within the file: TDA7421

TDA7421N Datasheet PDF Download

TDA7421N pdf