ADS7821 Datasheet | Burr-Brown

FEATURES q 100k Hz min SAMPLING RATE q 0 to +5V INPUT RANGE q 86d B min SINAD WITH 20k Hz INPUT q DNL: 16-bits “No Missing Codes” q SINGLE +5V SUPPLY OPERATION q PIN-PATIBLE WITH 12-BIT ADS7820 q USES INTERNAL OR EXTERNAL REFERENCE q FULL PARALLEL DATA OUTPUT q 100m W max POWER DISSIPATION q 28-PIN 0.3" PLASTIC DIP AND SOIC DESCRIPTION The ADS7821 is a plete 16-bit sampling A/D using state-of-the-art CMOS structures. It contains a plete 16-bit, capacitor-based, SAR A/D with S/H, reference, clock, interface for microprocessor use, and three-state output drivers. The ADS7821 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 ADS7821 is available in a plastic 0.3" DIP and in an SOIC, both fully specified for operation over the - 25°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 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-1323A Printed in U.S.A. June, 1996 SPECIFICATIONS ELECTRICAL TA = - 25°C to +85°C, f S = 100k Hz, VDIG = VANA = VD = +5V, using external reference, unless otherwise specified. ADS7821P, U PARAMETER RESOLUTION ANALOG INPUT Voltage Range Impedance Capacitance THROUGHPUT SPEED Conversion Cycle Throughput Rate DC ACCURACY Integral Linearity Error No Missing Codes Transition Noise(2) Full Scale Error(3,4) Full Scale Error Drift Full Scale Error(3,4) Full Scale...