AD7982 Datasheet | Analog Devices

FEATURES FUNCTIONAL BLOCK DIAGRAM High performance 2.5V TO 5V 2.5V True differential analog input range: ±VREF 0 V to VREF with VREF between 2.5 V to 5 V Easy to drive with the ADA4941-1 or ADA4940-1 Throughput: 1 MSPS Zero latency architecture 18-bit resolution with no missing codes INL: ±1 LSB typical, ±2 LSB maximum ±10V, ±5V, .. ADA4940-1/ ADA4941-1 REF VDD VIO IN+ AD7982 SCK IN- GND SDO CNV 1.8V TO 5V 3- OR 4-WIRE INTERFACE (SPI, CS DAISY CHAIN) 06513-001 Dynamic range: 99 d B, VREF = 5 V SNR: 98 d B at f IN = 1 k Hz, VREF = 5 V THD: - 119 d B at f IN = 1 k Hz, VREF = 5 V Figure 1. GENERAL DESCRIPTION SINAD: 97 d B at f IN = 1 k Hz, VREF = 5 V The AD7982 is an 18-bit, successive approximation, analog-to- Low power dissipation digital converter (ADC) that operates from a single power supply, Single-supply 2.5 V operation with 1.8 V, 2.5 V, 3 V, and VDD. The AD7982 contains a low power, high speed, 18-bit 5 V logic interface sampling ADC and a versatile serial interface port. On the CNV 4 m W at 1 MSPS (VDD only) rising edge, the AD7982 samples the voltage difference between 7 m W at 1 MSPS (total) the IN+ and IN- pins. The voltages on these pins usually swing 70 μW at 10 k SPS Proprietary serial interface SPI-/QSPI™/ MICROWIRE™-/DSP-patible1 in opposite phases between 0 V and VREF. The reference voltage, VREF, is applied externally and can be set independent of the supply voltage, VDD. Its power scales linearly with throughput. Ability to daisy-chain multiple ADCs and busy indicator 10-lead MSOP and 3 mm × 3 mm 10-lead LFCSP Wide operating temperature range: - 40°C to +85°C The serial peripheral interface (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 APPLICATIONS busy indicator. The AD7982 is patible with 1.8 V, 2.5 V, 3 V, Automated test equipment and 5 V logic, using the separate VIO supply. Data acquisition systems Medical...