ROHM Audio Sound Controller BH3857AFV Product Data Sheet Manual
Summary
The BH3857AFV is a powerful signal-processing IC engineered for advanced audio control in stereo systems, including Mini-components, car audios, and CD radio players. It provides low-distortion functionality to precisely manage volume, bass, treble, and surround sound using serial data input. This comprehensive manual acts as a developer's guide, covering detailed electrical specifications, operational timing charts, application examples, and integration details necessary for building robust, high-fidelity audio electronics.
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Audio sound controller BH3857AFV The BH3857AFV is a signal-processing IC for controlling audio quality in CD radio-cassette players and mini-component stereo systems. Three-line serial control is available making it easy to adjust tone and volume using a microprocessor.
Applications Mini-component stereo systems, CD radio cassette play- ers, car audio systems and TVs.
Features
1) Volume (main volume) and tone (bass and treble) 4) The IC includes a stable reference voltage source control possible by direct serial link to a microproces- and input buffer to reduce external component re- sor. DC control is also possible. quirements, and comes in a compact 40-pin SSOP 2) Volume control is done with a low-distortion, low- package that is perfect for compact designs. noise VCA, and step noise is suppressed. 5) Four open-collector outputs are provided to make 3) The gain of the input amplifier can be adjusted, and logic control possible.
two surround matrixes are available to expand the sound.
Absolute maximum ratings (Ta = 25C)
Recommended operating conditions (Ta = 25C)
Page Summary Contents For ROHM Audio Sound Controller BH3857AFV Product Data Sheet Manual
Manual Details
| Brand | Audio |
|---|---|
| Pages | 15 |
| File Size | 239.15 KB |
| Published | May 15, 2026 |
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Frequently Asked Questions
What steps are needed when first powering up the IC?
It is necessary to input data at least once while the set mute circuit is on.
Are the digital and analog power supplies separate during use?
Yes, the digital and analog power supplies and grounds must be completely separated in actual use.
What are the impedance requirements for DC control?
The VC, TC, and BC terminals have a 10kΩ internal impedance, while the SC terminal has 200kΩ.
If I am using external components (like input buffers), what is the maximum output voltage recommended?
You must not apply more than 15V to the output ports (Pins 1 to 4).