14-Bit Programmable Input ADC
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14-Bit, 1 MSPS, Unipolar/Bipolar Programmable Input PulSAR® ADC AD7951
FEATURES
Multiple pins/softw...
Description
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14-Bit, 1 MSPS, Unipolar/Bipolar Programmable Input PulSAR® ADC AD7951
FEATURES
Multiple pins/software programmable input ranges: 5 V, 10 V, ±5 V, ±10 V Pins or serial SPI® compatible input ranges/mode selection Throughput 1 MSPS (warp mode) 800 kSPS (normal mode) 670 kSPS (impulse mode) 14-bit resolution with no missing codes INL: ±0.3 LSB typ, ±1 LSB max (±61 ppm of FSR) SNR: 85 dB @ 2 kHz iCMOS® 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-compatible Power dissipation: 10 mW @ 100 kSPS 235 mW @ 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
AD7951
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 PulSAR Selection
Type Pseudo Differential 100 kSPS to 250 kSPS AD7651 AD7660 AD7661 AD7610 AD7663 AD7675 500 kSPS to 570 kSPS AD7650 AD7652 AD7664 AD7666 AD7665 570 kSPS to 1000 kSPS AD7653 AD7667 >1000 kSPS
APPLICATIONS
Process control Medical instruments High speed data acquisition Digital signal processing Instrumentation Spectrum analysis ATE
True Bipolar
T...
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