16-Bit, 8-Channel, 500 kSPS PulSAR ADC

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

* 16-bit resolution with no missing codes

* Throughput: 500 kSPS

* INL: ±0.5 LSB typical, ±1.5 LSB maximum (±23 ppm or FSR)

* Dynamic range: 93.3 dB