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ADS7812UBG4 Datasheet(PDF) 1 Page - Texas Instruments |
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ADS7812UBG4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 25 page Low-Power, Serial 12-Bit Sampling ANALOG-TO-DIGITAL CONVERTER DESCRIPTION The ADS7812 is a low-power, single +5V supply, 12-bit sampling analog-to-digital converter. It contains a complete 12-bit capacitor-based SAR A/D with a sample/hold, clock, reference, and serial data interface. The converter can be configured for a variety of input ranges including ±10V, ±5V, 0V to 10V, and 0.5V to 4.5V. A high impedance 0.3V to 2.8V input range is also available (input impedance > 10M Ω). For most input ranges, the input voltage can swing to +16.5V or –16.5V without damage to the converter. A flexible SPI compatible serial interface allows data to be synchronized to an internal or external clock. The ADS7812 is specified at a 40kHz sampling rate over the –40 °C to +85 °C temperature range. It is available in a 0.3" DIP-16 or an SO-16 package. FEATURES q 20 µs max CONVERSION TIME q SINGLE +5V SUPPLY OPERATION q PIN-COMPATIBLE WITH 16-BIT ADS7813 q EASY-TO-USE SERIAL INTERFACE q 0.3" DIP-16 AND SO-16 q ±0.5LSB max INL AND DNL q 72dB min SINAD q USES INTERNAL OR EXTERNAL REFERENCE q MULTIPLE INPUT RANGES q 35mW max POWER DISSIPATION q NO MISSING CODES q 50 µW POWER DOWN MODE ADS7812 ADS7 812 8k Ω(1) CDAC 4k Ω(1) 40k Ω(1) 20k Ω(1) Internal +2.5V Ref Clock EXT/INT DATACLK DATA Successive Approximation Register and Control Logic Serial Data Out Comparator Buffer BUSY PWRD CONV R1 IN R3 IN REF BUF CAP CS R2 IN NOTE: (1) Actual value may vary ±30%. APPLICATIONS q DATA ACQUISITION SYSTEMS q INDUSTRIAL CONTROL q TEST EQUIPMENT q DIGITAL SIGNAL PROCESSING ADS7812 SBAS042A – MARCH 1997 – REVISED SEPTEMBER 2003 www.ti.com PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 1997-2003, Texas Instruments Incorporated Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. |
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