AD7691BRMZ

AD7691 is an 18bit, charge redistribution, successive approximation, analogue to digital converter (ADC) that operates from a single power supply, VDD, between 2.3V and 5V. It contains a low power, high speed, 18bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. On the CNV rising edge, it samples the voltage difference between the IN+ and IN− pins. The voltages on these pins swing in opposite phases between 0V and REF. The reference voltage, REF, is applied externally and can be set up to the supply voltage. The part’s power scales linearly with throughput. Typical application includes battery-powered equipment, data acquisition, seismic data acquisition systems, DVMs, instrumentation and medical instruments.

• 18bit resolution with no missing codes
• Throughput: 250KSPS and INL: ±0.75LSB typical, ±1.5LSB maximum (±6 ppm of FSR)
• Dynamic range: 102dB typical at VREF = 5V and oversampled dynamic range: 125dB at 1KSPS
• Noise-free code resolution: 20bits at 1KSPS and effective resolution: 22.7bits at 1KSPS
• SINAD: 101.5dB typical at 1KHz, THD: -1185dB typical at 1KHz and no pipeline delay
• Proprietary serial interface: SPI/QSPI/MICROWIRE™/DSP compatible
• Ability to daisy-chain multiple ADCs and optional busy indicator feature
• Power dissipation: 1.35mW at 2.5V/100KSPS, 4mW at 5V/100KSPS, 1.4µW at 2.5V/100SPS
• 10-lead MSOP package
• Operating temperature range from -40°C to +85°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party