Product Details
●The AD7699 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.
●The AD7699 contains all components for use in a multichannel, low power data acquisition system, including a true 16-bit SAR ADC with no missing codes; an 8-channel low crosstalk multiplexer useful for configuring the inputs as single-ended (with or without ground sense), differential, or bipolar; an internal 4.096 V low drift reference and buffer; a temperature sensor; a selectable one-pole filter; and a sequencer that is useful when channels are continuously scanned in order.
●The AD7699 uses 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 AD7699 is housed in a tiny 20-lead LFCSP and a 20-ball WLCSP with operation specified from −40°C to +85°C.
●Applications
● Battery-powered equipment
● Medical instruments: ECG/EKG
● Mobile communications: GPS
● Personal digital assistants
● Power line monitoring
● Data acquisition
● Seismic data acquisition systems
● Instrumentation
● Process control
●### Features and Benefits
● 16-bit resolution with no missing codes
● 8-channel multiplexer with choice of inputs
● Unipolar single-ended
● Differential (GND sense)
● Pseudo bipolar
● Throughput: 500 kSPS
● INL: ±0.5 LSB typical, ±1.5 LSB maximum (±23 ppm or FSR)
● Dynamic range: 93.3 dB
● SINAD: 91.5 dB at 20 kHz
● THD: −97 dB at 20 kHz
● Analog input range: 0 V to VREF with VREF up to VDD
● Multiple reference types
● Internal 4.096 V
● External buffered (up to 4.096 V)
● External (up to VDD)
● Internal temperature sensor
● Channel sequencer, selectable 1-pole filter, busy indicator
● No pipeline delay, SAR architecture
● Single-supply 5 V operation with 1.8 V to 5 V logic interface
● Serial interface compatible with SPI, MICROWIRE, QSPI, and DSP
● Power dissipation
● 26 mW at 500 kSPS
● 5.2 μW at 100 SPS
● Standby current: 50 nA
● 20-lead 4 mm × 4 mm LFCSP package
● 20-lead 2.4 mm × 2.4 mm WLCSP package
