ADS7820 Datasheet | Burr-Brown

FEATURES q 100k Hz min SAMPLING RATE q 0 to +5V INPUT RANGE q 72d B min SINAD WITH 45k Hz INPUT q ±1/2 LSB max INL AND DNL q SINGLE +5V SUPPLY OPERATION q PIN-PATIBLE WITH 16-BIT ADS7821 q USES INTERNAL OR EXTERNAL REFERENCE q PLETE WITH S/H, REF, CLOCK, ETC. q FULL PARALLEL DATA OUTPUT q 100m W max POWER DISSIPATION q 28-PIN 0.3" PLASTIC DIP AND SOIC DESCRIPTION The ADS7820 is a plete 12-bit sampling A/D using state-of-the-art CMOS structures. It contains a plete 12-bit, capacitor-based SAR A/D with S/H, reference, clock, interface for microprocessor use, and three-state output drivers. The ADS7820 is specified at a 100k Hz sampling rate, and guaranteed over the full temperature range. Lasertrimmed scaling resistors provide a 0 to +5V input range, with power dissipation under 100m W. The 28-pin ADS7820 is available in a plastic 0.3" DIP and in an SOIC, both fully specified for operation over the industrial - 40°C to +85°C range. Clock Successive Approximation Register and Control Logic R/C CS BYTE BUSY CDAC 5kΩ 0 to +5V Input 6.66kΩ 20kΩ parator CAP Buffer 4kΩ REF Internal +2.5V Ref Output Latches and Three State Drivers Three State Parallel Data Bus 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 - Cable: BBRCORP - Telex: 066-6491 - FAX: (520) 889-1510 - Immediate Product Info: (800) 548-6132 ® © 1996 Burr-Brown Corporation 1 PDS-1322 Printed in U.S.A. June, 1996 ADS7820 SPECIFICATIONS ELECTRICAL TA = - 40°C to +85 °C, f S = 100k Hz, VDIG = VANA = +5V, using internal reference, unless otherwise specified. ADS7820P/U PARAMETER RESOLUTION ANALOG INPUT Voltage Ranges Impedance Capacitance THROUGHPUT SPEED Conversion Time plete Cycle Throughput Rate DC ACCURACY Integral Linearity Error Differential Linearity Error No Missing Codes Transition Noise(2) Full Scale Error(3,4) Full Scale Error Drift Full Scale Error(3,4) Full Scale...