AD7689BCPZ 16-Bit 8-Channel 250 kS/s Analog to Digital Converter Integrated Circuit Chip LFCSP-20

AD7689 is an 8-channel, 16-bit, charge redistribution successive approximation register (SAR) analog-to-digital converter (ADC) that operates from a single power supply, VDD. This device contains all components required for multichannel, low power data acquisition systems, including a true 16-bit SAR ADC with no missing codes, an 8-channel low crosstalk multiplexer for configuring inputs as single-ended (with or without ground sense), differential, or bipolar, an internal low drift reference (selectable 2.5V or 4.096V) and buffer, a temperature sensor, a selectable one-pole filter, and a sequencer for continuous channel scanning.

• 16-bit resolution with no missing codes
• 8-channel 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 temperature sensor (TEMP)
• Channel sequencer, selectable 1-pole filter, busy indicator
• No pipeline delay, SAR architecture
• Single-supply 2.3 V to 5.5 V operation with 1.8 V to 5.5 V logic interface
• Serial interface compatible with SPI, MICROWIRE, QSPI, and DSP
• Power dissipation: 3.5 mW at 2.5 V/200 kSPS, 12.5 mW at 5 V/250 kSPS
• Standby current: 50 nA
• 20-lead 4 mm × 4 mm LFCSP package

• 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