Analog Devices Inc. AD7991YRJZ-0500RL7

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.
Each AD7991/AD7995/AD7999 provides a 2-wire serial interface compatible with I²C interfaces. The AD7991 and AD7995 come in two versions, and each version has an individual I²C address. This allows two of the same devices to be connected to the same I²C bus. Both versions support standard, fast, and high-speed I²C interface modes. The AD7999 comes in one version.
The AD7991/AD7995/AD7999 normally remain in a shutdown state, powering up only for conversions. The conversion process is controlled by a command mode, during which each I²C read operation initiates a conversion and returns the result over the I²C bus.
When four channels are used as analog inputs, the reference for the part is taken from Voo; this allows the widest dynamic input range to the ADC. Therefore, the analog input range to the ADC is 0 V to Voo. An external reference, applied through the Vise/Vase input, can also be used with this part.

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 Voo of 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