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ADS7821

Part Number	ADS7821
Manufacturer	Burr-Brown Corporation
Description	16-Bit 10ms Sampling CMOS ANALOG-to-DIGITAL CONVERTER
Published	Mar 23, 2005
Detailed Description	® ADS 782 1 ADS7821 782 1 ADS 16-Bit 10µs Sampling CMOS ANALOG-to-DIGITAL CONVERTER FEATURES q 100kHz min SAMPLING...
Datasheet	ADS7821 PDF File

Overview

® ADS 782 1 ADS7821 782 1 ADS 16-Bit 10µs Sampling CMOS ANALOG-to-DIGITAL CONVERTER FEATURES q 100kHz min SAMPLING RATE q 0 to +5V INPUT RANGE q 86dB min SINAD WITH 20kHz INPUT q DNL: 16-bits “No Missing Codes” q SINGLE +5V SUPPLY OPERATION q PIN-COMPATIBLE WITH 12-BIT ADS7820 q USES INTERNAL OR EXTERNAL REFERENCE q FULL PARALLEL DATA OUTPUT q 100mW max POWER DISSIPATION q 28-PIN 0.
3" PLASTIC DIP AND SOIC DESCRIPTION The ADS7821 is a complete 16-bit sampling A/D using state-of-the-art CMOS structures.
It contains a complete 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 100kHz sampling rate, and guaranteed over the full temperature range.
Lasertrimmed scaling resistors provide a 0 to +5V input range, with power dissipation under 100mW.
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 Comparator 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://www.
burr-brown.
com/ • 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 1 ADS7821 Printed in U.
S.
A.
June, 1996 SPECIFICATIONS ELECTRICAL TA = –25°C to +85°C, fS = 100kHz, 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 Miss...

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