AD7982

www.DataSheet4U.com 18-bit, 1 MSPS PulSAR™ ADC in MSOP/QFN Preliminary Technical Data 18-bit resolution with no missing codes Throughput: 1MSPS Low Power dissipation: 7.5 mW @ 1MSPS, 75 μW @ 10kSPS INL: ±1 LSB typ, ±2.5 LSB max Dynamic range: 99 dB True differential analog input range: ±VREF 0 V to VREF with VREF between 2.5V to 5.0V Any input range and easy to drive with the ADA4941 No pipeline delay Single-supply 2.5V operation with 1.8 V/2.5 V/3 V/5 V logic interface Serial interface SPI®/QSPI™/MICROWIRE™/DSP-compatible Daisy-chain multiple ADCs and BUSY indicator 10-lead package: MSOP (MSOP-8 size) and QFN (LFCSP), 3 mm × 3 mm same space as SOT-23 2.5 TO 5V 2.5V AD7982 APPLICATION DIAGRAM EXAMPLE IN+ REF VDD VIO SDI SCK SDO GND CNV 1.8 TO 5V 3- OR 4-WIRE INTERFACE (SPI, , CS DAISY CHAIN) ±10V, ±5V, .. ADA4941 AD7982 IN– Figure 1. GENERAL DESCRIPTION The AD7982 is a 18-bit, successive approximation, analog-todigital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, it samples the voltage difference between IN+ and IN− pins. The voltages on these pins usually swing in opposite phase between 0 V and REF. The reference voltage, REF, is applied externally and can be set independently of the supply voltage, VDD. Its power scales linearly with throughput. The SPI-compatible serial interface also features the ability, using the SDI input, t...