AD7992 Datasheet | Analog Devices

FEATURES 12-bit ADC with fast conversion time: 2 µs typ 2 single-ended analog input channels Specified for VDD of 2.7 V to 5.5 V Low power consumption Fast throughput rate: up to 188 k SPS Sequencer operation Temperature range: - 40 °C to 125 °C Automatic cycle mode I2C®-patible serial interface supports standard, fast, and high speed modes Out-of-range indicator/alert function Pin-selectable addressing via AS 2 versions allow 5 I2C addresses Shutdown mode: 1 µA max 10-lead MSOP package FUNCTIONAL BLOCK DIAGRAM GND CONVST VIN1 VIN2/REFIN VDD I/P MUX VIN2/REFIN SOFTWARE CONTROL HYSTERESIS REGISTER CH0 DATAHIGH LIMIT REGISTER CH1 DATALOW LIMIT REGISTER CH1 DATAHIGH LIMIT REGISTER CH2 HYSTERESIS REGISTER CH1 DATALOW LIMIT REGISTER CH2 AS I2C INTERFACE GND CONVERSION RESULT REGISTER CONFIGURATION REGISTER ALERT STATUS REGISTER CYCLE TIMER REGISTER SCL SDA 03263-0-001 T/H 12-BIT SUCCESSIVE APPROXIMATION ADC CONTROL LOGIC ALERT GENERAL DESCRIPTION The AD7992 is a 12-bit, low power, successive approximation ADC with an I2C-patible interface. The part operates from a single 2.7 V to 5.5 V power supply and features a 2 µs conversion time. The part contains a 2-channel multiplexer and trackand-hold amplifier that can handle input frequencies up to 11 MHz. The AD7992 provides a 2-wire serial interface patible with I2C interfaces. The part es in two versions, the AD7992-0 and the AD7992-1, and each version allows for at least two different I2C addresses. The AD7992-0 supports standard and fast I2C interface modes, and the AD7992-1 supports standard, fast, and high speed I2C interface modes. The AD7992 normally remains in a shutdown state while not converting, and powers up only for conversions. The conversion process can be controlled using the CONVST pin, by a mand mode where conversions occur across I2C write operations, or an automatic conversion interval mode selected through software control. The AD7992 requires an external reference in the range of 1.2 V to...