AD7951 Datasheet | Analog Devices

.. 14-Bit, 1 MSPS, Unipolar/Bipolar Programmable Input Pul SAR® ADC AD7951 Features Multiple pins/software programmable input ranges: 5 V, 10 V, ±5 V, ±10 V Pins or serial SPI® patible input ranges/mode selection Throughput 1 MSPS (warp mode) 800 k SPS (normal mode) 670 k SPS (impulse mode) 14-bit resolution with no missing codes INL: ±0.3 LSB typ, ±1 LSB max (±61 ppm of FSR) SNR: 85 d B @ 2 k Hz i CMOS® process technology 5 V internal reference: typical drift 3 ppm/°C; TEMP output No pipeline delay (SAR architecture) Parallel (14- or 8-bit bus) and serial 5 V/3.3 V interface SPI-/QSPI™-/MICROWIRE™-/DSP-patible Power dissipation: 10 m W @ 100 k SPS 235 m W @ 1 MSPS 48-lead LQFP and LFCSP (7 mm × 7 mm) packages FUNCTIONAL BLOCK DIAGRAM TEMP REFBUFIN REF REFGND VCC VEE DVDD AGND AVDD PDREF PDBUF IN+ IN- SWITCHED CAP DAC REF DGND OVDD OGND REF AMP SERIAL DATA PORT SERIAL CONFIGURATION 14 PORT D[13:0] SER/PAR BYTESWAP PARALLEL INTERFACE CNVST PD RESET CLOCK CONTROL LOGIC AND CALIBRATION CIRCUITRY OB/2C BUSY RD CS 06396-001 WARP IMPULSE BIPOLAR TEN Figure 1. Table 1. 48-Lead 14-/16-/18-Bit Pul SAR Selection Type Pseudo Differential 100 k SPS to 250 k SPS AD7651 AD7660 AD7661 AD7610 AD7663 AD7675 500 k SPS to 570 k SPS AD7650 AD7652 AD7664 AD7666 AD7665 570 k SPS to 1000 k SPS AD7653 AD7667 >1000 k SPS APPLICATIONS Process control Medical instruments High speed data acquisition Digital signal processing Instrumentation Spectrum analysis ATE True Bipolar True Differential 18-Bit, True Differential Multichannel/ Simultaneous AD7676 AD7951 AD7612 AD7671 AD7677 AD7678 AD7679 AD7654 AD7655 AD7674 GENERAL 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 i CMOS high voltage process. The device is configured through hardware or via a dedicated write only serial configuration port for input range and operating mode....