The document describes the features and characteristics of an audio interface LSI named BU76310AGU. It has various functions including stereo 16-bit ΔΣCODEC, 2-input stereo selector, stereo microphone amplifier with ALC function, stereo line amplifier, BTL output speaker amplifier, etc.
The BU76310AGU is an audio interface LSI from ROHM that integrates a 16‑bit stereo CODEC, 2‑input selector, microphone amplifier with ALC, line amplifier, and a BTL speaker amplifier (400 mW @ 8 Ω). It supports PLL‑based and non‑PLL sampling rates from 8 kHz up to 48 kHz and offers a 64‑step electronic volume control.
The document details absolute maximum ratings, operating conditions, electrical characteristics, pin assignments, register maps, and design notes such as thermal protection, grounding, and handling precautions. It is intended for designers of audio, video, office‑automation, and consumer electronic equipment.
| Supply voltage (VDD) range | 0.3 V ~ 4.5 V |
|---|---|
| Input voltage (VIN) range | -0.3 V ~ VDD+0.3 V |
| Storage temperature range | -50 °C ~ 125 °C |
| Operating temperature range | -20 °C ~ 85 °C |
| Typical supply voltage (VDD) | 2.7736 V |
| Current consumption (play mode) | 8.4 mA ~ 16 mA |
| Signal‑to‑Noise Ratio (typical) | 78 dB ~ 88 dB |
| THD+N (typical) | 62 dB ~ 72 dB |
| Speaker amplifier output power | 400 mW @ 8 Ω |
The device operates with a supply voltage (VDD) from 0.3 V to 4.5 V.
The BTL speaker amplifier can deliver up to 400 mW into an 8 Ω load.
The device is rated for operation between –20 °C and +85 °C.