GENERAL DESCRIPTION

The AD7991/AD7995/AD7999 are 12-/10-/8-bit, low power, successive approximation ADCs with an I2C®-compatible interface. Each part operates from a single 2.7 V to 5.5 V power supply and features a 1 μs conversion time. The track-and-hold amplifier allows each part to handle input frequencies of up to 14 MHz, and a multiplexer allows taking samples from four channels.

FEATURES

12-/10-/8-bit ADCs with fast conversion time: 1 μs typical

4 analog input channels/3 analog input channels with reference input

Specified for VDDof 2.7 V to 5.5 V

Sequencer operation

Temperature range: −40°C to +125°C

I2C-compatible serial interface supports standard, fast, and high speed modes

2 versions allow 2 I2C addresses

Low power consumption

Shutdown mode: 1 μA maximum

8-lead SOT-23 package

APPLICATIONS

System monitoring

Battery-powered systems

Data acquisition

Medical instruments