ADS7825 Datasheet | Burr-Brown

FEATURES q 25µs max SAMPLING AND CONVERSION q SINGLE +5V SUPPLY OPERATION q PIN-PATIBLE WITH 12-BIT ADS7824 q PARALLEL AND SERIAL DATA OUTPUT q 28-PIN 0.3" PLASTIC DIP AND SOIC q ±2.0 LSB max INL q 50m W max POWER DISSIPATION q 50µW POWER DOWN MODE q ±10V INPUT RANGE, FOUR CHANNEL MULTIPLEXER q CONTINUOUS CONVERSION MODE DESCRIPTION The ADS7825 can acquire and convert 16 bits to within ±2.0 LSB in 25µs max while consuming only 50m W max. Laser-trimmed scaling resistors provide the standard industrial ±10V input range and channelto-channel matching of ±0.1%. The ADS7825 is a low-power 16-bit sampling A/D with a four channel input multiplexer, S/H, clock, reference, and a parallel/serial microprocessor interface. It can be configured in a continuous conversion mode to sequentially digitize all four channels. The 28-pin ADS7825 is available in a plastic 0.3" DIP and in a SOIC, both fully specified for operation over the industrial - 40°C to +85°C range. Continuous Conversion 40kΩ AIN0 Clock 20kΩ 40kΩ AIN1 20kΩ 40kΩ AIN2 20kΩ 40kΩ AIN3 20kΩ 8kΩ CAP 6kΩ REF 8kΩ 8kΩ 8kΩ CDAC CONTC Channel A0 A1 R/C CS PWRD Successive Approximation Register and Control Logic BUSY Serial parator Data Out or Parallel Data Out Buffer Internal +2.5V Ref 8 D7-D0 BYTE SDATA DATACLK International Airport Industrial Park - Mailing Address: PO Box 11400, Tucson, AZ 85734 - Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 - Tel: (520) 746-1111 - Twx: 910-952-1111 Internet: http://.burr-brown./ - FAXLine: (800) 548-6133 (US/Canada Only) - Cable: BBRCORP - Telex: 066-6491 - FAX: (520) 889-1510 - Immediate Product Info: (800) 548-6132 ® © 1996 Burr-Brown Corporation PDS-1304B 1 Printed in U.S.A. October, 1997 ADS7825 SPECIFICATIONS ELECTRICAL At TA = - 40°C to +85°C, f S = 40k Hz, VS1 = VS2 = VS = +5V ±5%, using external reference, CONTC = 0V, unless otherwise specified. ADS7825P, U PARAMETER RESOLUTION ANALOG INPUT Voltage Range Impedance Capacitance THROUGHPUT SPEED Conversion Time...