ADI AD7694ARMZ

The AD7694 is a 16-bit, charge redistribution, successive approximation, PulSAR analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.7 V to 5.25 V. It contains a low power, high speed, 16-bit sampling ADC with no missing codes (B grade), an internal conversion clock, and a serial, SPI-compatible interface port. The part also contains a low noise, wide bandwidth, short aperture delay track-and-hold circuit. On the CNV rising edge, it samples an analog input, IN+ , between 0 V to REF with respect to a ground sense, IN−. The reference voltage, REF, is applied externally and can be set up to the supply voltage. Its power scales linearly with throughput. The AD7694 is housed in an 8-lead MSOP package with an operating temperature specified from -40 °C to +85 °C.

• 16-bit resolution with no missing codes
• Throughput: 250 kSPS at 5 V
• INL: ±4 LSB max
• S/(N+D): 92 dB at 20 kHz
• THD: –106 dB at 20 kHz
• Pseudo-differential analog input range: 0 V to VREF with VREF up to VDD
• No pipeline delay
• Single-supply operation: 2.7 V or 5 V
• Proprietary serial interface SPI-/QSPI-/MICROWIRE-/DSP-compatible
• Supply Current: 540 μA at 2.7 V/100 kSPS, 800 μA at 5 V/100 kSPS
• Standby current: 1 nA
• 8-lead MSOP package
• Improved second source to LTC1864 and LTC1864L

• Battery-powered equipment
• Data acquisition
• Instrumentation
• Medical instruments
• Process control