AD1991 is a digital audio power amplifier produced by Analog Devices.
The AD1991 is a Class D/1-bit audio power output stage designed for applications such as PC audio systems, automotive amplifiers, and home theater systems. It operates as a 2-channel Bridge-Tied Load (BTL) output or a 4-channel single-ended output, configurable via the MODE pin during reset. The device features turn-on and turn-off pop suppression, short-circuit protection, and overtemperature shutdown to protect both the IC and connected speakers.
The component operates with a power supply range from 8 V to 20 V and delivers up to 20 W per channel in stereo mode at 14.4 V or 40 W in mono mode at 20 V. It utilizes a 52-lead exposed pad TQFP package and is available in an industrial temperature range of -40°C to +85°C.
| Efficiency | > 85% @ Full Power |
|---|---|
| Supply Voltage Range | 8 V to 20 V |
| Operating Temperature Range | -40°C to +85°C |
| Package Type | 52-Lead Exposed Pad TQFP |
The AD1991 is configured during reset to be in either 2-channel mode or 4-channel mode.
Yes, it includes turn-on and turn-off pop suppression, short-circuit protection, and overtemperature shutdown.
The device can be operated over a power supply range from 8 V to 20 V.