深圳市中立信电子科技有限公司

DS4420N+T&R

I2C Programmable-Gain Amplifier  for Audio Applications

音频放大器 I2C Programmable Gain Amplifier

General Description

The DS4420N+T&R DS4420 is a fully differential, programmable-gain

amplifier for audio applications. It features a -35dB to

+25dB gain range controlled by an I2C interface and it

is optimized to drive loads as low as 50Ω. The gain is

adjustable in 3dB increments across the entire range.

Three address inputs, used to select the I2C slave

address, enable up to eight devices on a common bus.

The product operates from a single 5V supply over a

-20°C to +70°C temperature range. It is offered in a

3mm x 3mm TDFN package.

Features DS4420N+T&R

♦ Differential Inputs and Outputs

♦ -35dB to +25dB Adjustable Gain

♦ Low Output Noise

♦ Low-Distortion Driving into a 50Ω Load

♦ 3dB Gain Steps Programmed through I2C Interface

♦ 5V Single Supply

♦ 20kHz Bandwidth for All Gain Settings

♦ Small 3mm x 3mm x 0.8mm TDFN Package

♦ Up to Eight DS4420s can be Placed on the Same I2C Bus

Applications DS4420N+T&R

Telephone Headsets

Audio Volume Control

Microphone Gain Control