AD7694

www.DataSheet4U.com 16-Bit, 250 kSPS PulSAR ADC in MSOP AD7694 FEATURES 16-bit resolution with no missing codes Throughput: 250 kSPS @ 5 V INL: ±4 LSB max S/(N + D): 92 dB @ 20 kHz THD: –106 dB @ 20 kHz Pseudo-differential analog input range: 0 V to VREF with VREF up to VDD No pipeline delay Single-supply operation: 2.7 V or 5 V Serial interface SPI®/QSPI™/MICROWIRE™/DSP-compatible Supply Current: 540 µA @ 2.7 V/100 kSPS, 800 µA @ 5 V/100 kSPS Standby current: 1 nA 8-lead MSOP package Improved 2nd Source to LTC1864 and LTC1864L APPLICATION DIAGRAM 1V TO VDD 2.5V TO 5V 0 TO VREF IN+ IN– REF VDD SCK SDO CNV 3-WIRE SPI INTERFACE 05003-001 AD7694 GND Figure 1. Table 1. MSOP, QFN (LFCSP)/SOT-23, 16-Bit PulSAR ADC Type True Differential Pseudo Differential/Unipolar Unipolar 100 kSPS AD7684 AD7683 AD7680 250 kSPS AD7687 AD7685 AD7694 500 kSPS AD7688 AD7686 APPLICATIONS Battery-powered equipment Data acquisition Instrumentation Medical instruments Process control GENERAL DESCRIPTION The AD7694 is a 16-bit, charge redistribution, successive approximation, PulSAR™ analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.7 V to 5.25 V. It contains a low power, high speed, 16-bit sampling ADC with no missing codes (B grade), an internal conversion clock, and a serial, SPI-compatible interface port. The part also contains a low noise, wide bandwidth, short aperture delay track-and-hold circuit. On the CNV rising edge, it samples an analog input,...