ADS7861

ADS7861 ADS7861 ADS7861 SBAS110D – DECEMBER 1998 – REVISED AUGUST 2007 Dual, 500kSPS, 12-Bit, 2 + 2 Channel, Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER FEATURES q 4 INPUT CHANNELS q FULLY DIFFERENTIAL INPUTS q 2µs TOTAL THROUGHPUT PER CHANNEL q NO MISSING CODES q 1MHz EFFECTIVE SAMPLING RATE q LOW POWER: 40mW q SSI SERIAL INTERFACE q OPERATING TEMPERATURE RANGE: –40°C to +125°C APPLICATIONS q MOTOR CONTROL q MULTI-AXIS POSITIONING SYSTEMS q 3-PHASE POWER CONTROL CH A0+ CH A0– CH A1+ CH A1– REFIN REFOUT CH B0+ CH B0– DESCRIPTION The ADS7861 is a dual, 12-bit, 500kSPS, Analog-to-Digital (A/D) converter with four fully differential input channels grouped into two pairs for high speed, simultaneous signal acquisition. Inputs to the sample-and-hold amplifiers are fully differential and are maintained differential to the input of the A/D converter. This provides excellent common-mode rejection of 80dB at 50kHz which is important in high noise environments. The ADS7861 offers a high-speed, dual serial interface and control inputs to minimize software overhead. The output data for each channel is available as a 12-bit word. The ADS7861 is offered in both an SSOP-24 and a QFN-32 package and is fully specified over the –40°C to +125°C operating range. SHA CDAC SAR COMP Internal 2.5V Reference SHA CDAC COMP Serial Interface SERIAL DATA A SERIAL DATA B M0 M1 A0 CLOCK CS RD BUSY CONVST CH B1+ CH B1– SAR Please be aware that an important notice concerning availabilit...