ADS7821

® 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) ...