AD7980

Data Sheet 16-Bit, 1 MSPS, PulSAR 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 dB, VREF = 5 V SNR: 91.5 dB at fIN = 10 kHz, VREF = 5 V THD: −114 dB at fIN = 10 kHz, VREF = 5 V SINAD: 91 dB at fIN = 10 kHz, 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 mW at 1 MSPS (VDD only) 7 mW at 1 MSPS (total) 70 µW at 10 kSPS Proprietary serial interface SPI/QSPI/MICROWIRE™/DSP compatible 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 SDI IN+ AD7980 SCK IN– SDO GND CNV 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 appl...