AD7689
Description
The AD7682/AD7689 are 4-channel/8-channel, 16-bit, charge redistribution successive approximation register (SAR) analog-to-digital converters (ADCs) that operate from a single power supply, VDD. The AD7682/AD7689 contain all ponents for use in a multichannel, low power data acquisition system, including a true 16-bit SAR ADC with no missing codes; a 4-channel (AD7682) or 8-channel (AD7689) low crosstalk multiplexer that is useful for configuring the inputs as single-ended (with or without ground sense), differential, or bipolar; an internal low drift reference (selectable 2.5 V or 4.096 V) and buffer; a temperature sensor; a selectable one-pole filter; and a sequencer that is useful when channels are continuously scanned in order.
Key Features
- 16-bit resolution with no missing codes
- 4-channel (AD7682)/8-channel (AD7689) multiplexer with choice of inputs
- Unipolar single-ended
- Differential (GND sense)
- Pseudobipolar
- Throughput: 250 kSPS
- INL: ±0.4 LSB typical, ±1.5 LSB maximum (±23 ppm or FSR)
- Dynamic range: 93.8 dB
- SINAD: 92.5 dB at 20 kHz
- THD: -100 dB at 20 kHz
