The AD7091R-5 is a 12-bit, multichannel, ultralow power, successive approximation analog-to-digital converter (ADC). The AD7091R-5 operates from a single 2.7 V to 5.25 V power supply and typically consumes only 24 µA at a 3 V supply in fast mode.
The AD7091R-5 provides a 2-wire serial interface compatible with I2C interfaces. The conversion process can be controlled by a sample mode via the CONVST pin, an autocycle mode selected through software control, or a command mode in which conversions occur across I2C write operations.
The device contains a wide bandwidth track-and-hold amplifier that can handle input frequencies up to 1.5 MHz. The AD7091R-5 also features an on-chip conversion clock, an on-chip accurate 2.5 V reference, and a programmable out-of-bounds user alert function.
The AD7091R-5 offers four single-ended analog input channels with a channel sequencer that allows a preprogrammed selection of channels to be converted sequentially.
- I2C-compatible serial interface supports standard and fast modes
- Ultralow power: 90 ?W typical at 3 V in fast mode
- Specified for VDD of 2.7 V to 5.25 V
- On-chip accurate 2.5 V reference, 5 ppm/°C typical drift
- 4 single-ended analog input channels
- ALERT function
- BUSY function
- Autocycle mode
- Flexible power/throughput rate management
- No pipeline delays
- Temperature range: -40°C to +125°C
