The AD7682/AD7689 are 4-channel/8-channel, 16-bit, charge redistribution successive approximation register (SAR) analog-to-digital converters (ADCs) that operate from a single power supply, VDD. The AD7682/AD7689 contain all components for use in a multichannel, low power data acquisition system, including a true 16-bit SAR ADC with no missing codes; a 4-channel (AD7682) or 8-channel (AD7689) low crosstalk multiplexer that is useful for configuring the inputs as single-ended (with or without ground sense), differential, or bipolar; an internal low drift reference (selectable 2.5 V or 4.096 V) and buffer; a temperature sensor; a selectable one-pole filter; and a sequencer that is useful when channels are continuously scanned in order. The AD7682/AD7689 use a simple serial port interface (SPI) for writing to the configuration register and receiving conversion results. The SPI interface uses a separate supply, VIO, which is set to the host logic level. Power dissipation scales with throughput. The AD7682/AD7689 are housed in a tiny 20-lead lead frame chip scale package (LFCSP) and 20-lead wafer level chip scale package (WLCSP) with operation specified from −40°C to +85°C. The AD7689 includes an extended temperature range model with specifications guaranteed to a maximum temperature (TMAX) of +125°C. APPLICATIONS * Multichannel system monitoring * Battery-powered equipment * Medical instruments: ECG/EKG * Mobile communications: GPS * Power line monitoring * Data acquisition * Seismic data acquisition systems * Instrumentation * Process control * 16-bit resolution with no missing codes * 4-channel (AD7682)/8-channel (AD7689) multiplexer with choice of inputs * Unipolar single-ended * Differential (GND sense) * Pseudobipolar * Throughput: 250 kSPS * INL: ±0.4 LSB typical, ±1.5 LSB maximum (±23 ppm or FSR) * Dynamic range: 93.8 dB * SINAD: 92.5 dB at 20 kHz * THD: −100 dB at 20 kHz * Analog input range: 0 V to VREF with VREF up to VDD * Multiple reference types * Internal selectable 2.5 V or 4.096 V * External buffered (up to 4.096 V) * External (up to VDD) https://elecena.pl/product/757114/16-bit-4-channel-250-ksps-pulsar-adc 2008-11-17 https://elecena.pl/product/757114/16-bit-4-channel-250-ksps-pulsar-adc 2015-03-28 https://elecena.pl/product/757114/16-bit-4-channel-250-ksps-pulsar-adc 2025-01-21