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ADS7803

Part Number	ADS7803
Manufacturer	Burr-Brown Corporation
Description	Autocalibrating/ 4-Channel/ 12-Bit ANALOG-TO-DIGITAL CONVERTER
Published	Mar 23, 2005
Detailed Description	® ADS7803 Autocalibrating, 4-Channel, 12-Bit ANALOG-TO-DIGITAL CONVERTER FEATURES q LOW POWER: 10mW plus Power Down q ...
Datasheet	ADS7803 PDF File

Overview

® ADS7803 Autocalibrating, 4-Channel, 12-Bit ANALOG-TO-DIGITAL CONVERTER FEATURES q LOW POWER: 10mW plus Power Down q SIGNAL-TO-(NOISE + DISTORTION) RATIO OVER TEMPERATURE: 69dB min with fIN = 1kHz 66dB min with fIN = 50kHz q FAST CONVERSION TIME: 8.
5µs Including Acquisition (117kHz Sampling Rate) q DC PERFORMANCE OVER TEMPERATURE: ±3/4 LSB max Total Error ±1/4 LSB max Channel Mismatch q FOUR-CHANNEL INPUT MULTIPLEXER q SINGLE SUPPLY: +5V q PIN COMPATIBLE WITH ADC7802 DESCRIPTION The ADS7803 is a monolithic CMOS 12-bit analogto-digital converter with internal sample/hold and fourchannel multiplexer.
It is designed and tested for full dynamic performance with input signals to 50kHz.
An autocalibration cycle guarantees a total unadjusted error within ±3/4LSB over the specified temperature range, eliminating the need for offset or gain adjustment.
The 5V single-supply requirements and standard CS, RD, and WR control signals make the part easy to use in microprocessor applications.
Conversion results are available in two bytes through an 8-bit three-state output bus.
The ADS7803 is available in a 28-pin plastic DIP and 28-lead PLCC, fully specified for operation over the industrial –40°C to +85°C temperature range.
A0 A1 Address Latch and Decoder Calibration Microcontroller and Memory Clock Control Logic CS RD WR SFR AIN0 AIN1 AIN2 AIN3 Analog Multiplexer Capacitor Array Sampling ADC Three-State Input/Output BUSY 8-Bit Data Bus VREF+ VREF– International Airport Industrial Park • Mailing Address: PO Box 11400 Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP • © • Tucson, AZ 85734 • Street Address: 6730 S.
Tucson Blvd.
• Tucson, AZ 85706 Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132 PDS-1126A Printed in U.
S.
A.
August, 1993 1991 Burr-Brown Corporation SPECIFICATIONS ELECTRICAL VA = VD = VREF+ = 5V ±5%; VREF– = AGND = DGND = 0V; CLK = 2MHz external, TA = –40°C to +85°C, after calibration at any temperature, unless ...

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