AD7691

www.DataSheet4U.com 18-Bit, 1.5 LSB INL, 250 kSPS PulSAR® Differential ADC in MSOP/QFN AD7691 FEATURES 18-bit resolution with no missing codes Throughput: 250 kSPS INL: ±0.75 LSB typ, ±1.5 LSB max (±6 ppm of FSR) Dynamic range: 102 dB typ @ 250 kSPS Oversampled dynamic range: 125 dB @1 kSPS Noise-free code resolution: 20 bits @ 1 kSPS Effective resolution: 22.7 bits @ 1 kSPS SINAD: 101.5 dB typ @ 1 kHz THD: −125 dB typ @ 1 kHz True differential analog input range: ±VREF 0 V to VREF with VREF up to VDD on both inputs No pipeline delay Single-supply 2.3 V to 5 V 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 Power dissipation 5 mW @ 5 V/250 kSPS 50 μW @ 5 V/1 kSPS Standby current: 1 nA 10-lead package: MSOP (MSOP-8 size) and 3 mm × 3 mm QFN 1 (LFCSP) (SOT-23 size) Pin-for-pin compatible with the18-bit AD7690 and 16-bit AD7693, AD7688, and AD7687 APPLICATION DIAGRAM +2.3V TO VDD +2.3V TO +5V IN+ ±10V, ±5V, ... REF VDD VIO SDI SCK SDO GND CNV +1.8V TO VDD 3- OR 4-WIRE INTERFACE (SPI, DAISY CHAIN, CS) IN– ADA4941 AD7691 Figure 2. Table 1. MSOP, QFN (LFCSP)/SOT-23 14-/16-/18-Bit PulSAR ADC 100 kSPS 250 kSPS AD7691 AD7687 AD7685 AD7694 AD7942 400 kSPS to 500 kSPS AD7690 AD7688 AD7693 AD7686 ADC Driver ADA4941-1 ADA4841-x ADA4941-1 ADA4841-x ADA4841-x 1 Type 18-Bit 16-Bit True Differential 16-Bit Pseudo Differential/ Unipolar 14-Bit 1 AD7684 AD7683 AD7680 AD7940 AD7946...