AD7980 Datasheet | Analog Devices

Data Sheet 16-Bit, 1 MSPS, Pul SAR ADC in MSOP/LFCSP AD7980 Features High performance Pseudo differential analog input range 0 V to VREF with VREF between 2.5 V to 5 V Throughput: 1 MSPS Zero latency architecture 16-bit resolution with no missing codes INL: ±0.6 LSB typical, ±1.25 LSB maximum Dynamic range: 92 d B, VREF = 5 V SNR: 91.5 d B at f IN = 10 k Hz, VREF = 5 V THD: - 114 d B at f IN = 10 k Hz, VREF = 5 V SINAD: 91 d B at f IN = 10 k Hz, VREF = 5 V Low power dissipation Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface 4 m W at 1 MSPS (VDD only) 7 m W at 1 MSPS (total) 70 µW at 10 k SPS Proprietary serial interface SPI/QSPI/MICROWIRE™/DSP patible Daisy-chain multiple ADCs and busy indicator 10-lead MSOP, 10-lead, 3 mm × 3 mm LFCSP Wide operating temperature range: - 40°C to +125°C APPLICATIONS Automated test equipment Data acquisition systems Medical instruments Machine automation TYPICAL APPLICATION CIRCUIT 2.5V TO 5V 2.5V 0 TO VREF REF VDD VIO IN+ AD7980 SCK IN- 1.8V TO 5.0V 3- OR 4-WIRE INTERFACE (SPI, DAISY CHAIN, CS) 06392-001 Figure 1. GENERAL DESCRIPTION The AD79801 is a 16-bit, successive approximation, analog-todigital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 16-bit sampling ADC and a versatile serial interface port. 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 independent of the supply voltage, VDD. Its power scales linearly with throughput. The SPI-patible serial interface also Features the ability, using the SDI input, to daisy-chain several ADCs on a single, 3-wire bus and provides an optional busy indicator. It is patible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate supply VIO. The AD7980 is housed in a 10-lead MSOP or a 10-lead LFCSP with operation specified from - 40°C to +125°C. 1 Protected by...