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Description

The AD7951 is a 14-bit, charge redistribution, successive approximation register (SAR) architecture analog-to-digital converter (ADC) fabricated on Analog Devices, Inc.’s iCMOS high voltage process. The device is configured through hardware or via a dedicated write only serial configuration port for input range and operating mode. The IC contains a high speed 14-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and both serial and parallel system interface ports. A falling edge on CNVST samples the analog input on IN+ with respect to a ground sense, IN−. The device features four different analog input ranges and three different sampling modes: warp mode for the fastest throughput, normal mode for the fastest asynchronous throughput, and impulse mode where power is scaled with throughput. Operation is specified from −40°C to +85°C.

Features

1. Multiple pins/software programmable input ranges : 5 V, 10 V, ±5 V, ±10 V

2. Pins or serial SPI® compatible input ranges/mode selection 

3. Throughput
1 MSPS (warp mode)
800 kSPS (normal mode)
670 kSPS (impulse mode)

4. 14-bit resolution with no missing codes
5. INL: ±0.3 LSB typ, ±1 LSB max (±61 ppm of FSR)
6. SNR: 85 dB @ 2 kHz
7. iCMOS process technology

Applications 

1. Process control
2. Medical instruments
3. High speed data acquisition
4. Digital signal processing
5. Instrumentation
6. Spectrum analysis