AD7631

www.DataSheet4U.com Preliminary Technical Data FEATURES Multiple pins/software programmable input ranges: ±10V, ±5V, 10V, 5V iCMOS™ process technology Pins or serial SPI input ranges/mode selection Throughput: 670kSPS (AD7634) 250kSPS (AD7631) INL: ± 1.75 LSB (7± ppm of full scale) DNL: +2/-1 LSB 18-bit resolution with no missing codes Dynamic range: 102.5 dB typical SNR: 101 dB typical THD: -122 dB typical 5V internal reference: typical drift 7ppm/°C; TEMP output No pipeline delay (SAR architecture) Parallel (18, 16- or 8-bit bus) and serial 5 V/3.3 V interface SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible Power dissipation: 190 mW @ 670kSPS 75 mW @ 250kSPS Pb-free 48-lead LQFP and LFCSP (7x7mm) packages Pin compatible with other PulSAR ADCs 18-Bit 250/670 kSPS PulSAR® Bipolar Programmable Inputs ADC AD7631/AD7634 FUNCTIONAL BLOCK DIAGRAM TEMP REFBUFIN REF REFGND VCC VEE AGND AVDD REF REF AMP IN+ INSWITCHED CAP DAC DVDD DGND AD7631/ AD7634 SERIAL PROGRAMMABLE PORT SERIAL DATA PORT OVDD OGND SPPEN SPPCLK SPPDATA HW/SW 18 D[17:0] BUSY PDREF PDBUF PD RESET CLOCK CONTROL LOGIC AND CALIBRATION CIRCUITRY PARALLEL INTERFACE RD CS D0/OB/2C CNVST WARP IMPULSE MODE0 MODE1 Figure 1. Table 1. PulSAR® Selection Type/kSPS Pseudo Differential 100 to 250 AD7651, AD7660 AD7661 AD7610, AD7663 AD7675 500 to 570 AD7650 AD7652 AD7664 AD7666 AD7665 AD7676 650 to 1000 AD7653 AD7667 >1000 True Bipolar True Differential 18-Bit Multichannel/ Simultaneous APPLICATIONS Process control High spe...