8ADC

The AD7689 is an 8-channel, 16-bit, charge redistribution successive approximation register (SAR) analog to-digital converter that operates from a single power supply, VDD.

Key Features

• 16-bit resolution with no missing codes
• 8-channel multiplexer with choice of inputs
• Simple SPI interface uses a separate supply, VIO, which is set to the host logic level
• 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
• Analog input range: 0 V to VREF with VREF up to VDD
• Internal low drift reference (selectable 2.5 V or 4.096 V) and buffer
• Temperature sensor
• Extended temperature range from -40 °C to +85 °C.