ADS7832

® ADS 783 2 ADS7832 ADS 7832 Autocalibrating, 4-Channel, 12-Bit ANALOG-TO-DIGITAL CONVERTER FEATURES q PIN COMPATIBLE TO ADC7802 AND ADS7803 q SINGLE SUPPLY: +5V OR +3.3V q LOW POWER: 14mW 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 FOUR-CHANNEL INPUT MULTIPLEXER q AUTOCAL: No offset or Gain Adjust Required DESCRIPTION The ADS7832 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. 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 ADS7832 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, Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 Tel: (520) 746-1111 Twx: 910-952-1111 Internet...