ADS7842

ADS7842 ADS7842 SBAS103C – SEPTEMBER 2000 – REVISED OCTOBER 2006 12-Bit, 4-Channel Parallel Output Sampling ANALOG-TO-DIGITAL CONVERTER FEATURES q SINGLE SUPPLY: 2.7V to 5V q 4-CHANNEL INPUT MULTIPLEXER q UP TO 200kHz SAMPLING RATE q FULL 12-BIT PARALLEL INTERFACE q ±1LSB INL AND DNL q NO MISSING CODES q 72dB SINAD q LOW POWER: 2mW q SSOP-28 PACKAGE APPLICATIONS q DATA ACQUISITION q TEST AND MEASUREMENT q INDUSTRIAL PROCESS CONTROL q MEDICAL INSTRUMENTS q LABORATORY EQUIPMENT DESCRIPTION The ADS7842 is a complete, 4-channel, 12-bit Analog-toDigital Converter (ADC). It contains a 12-bit, capacitorbased, Successive Approximation Register (SAR) ADC with a sample-and-hold amplifier, interface for microprocessor use, and parallel, 3-state output drivers. The ADS7842 is specified at a 200kHz sampling rate while dissipating only 2mW of power. The reference voltage can be varied from 100mV to VCC with a corresponding LSB resolution from 24µV to 1.22mV. The ADS7842 is tested down to 2.7V operation. Low power, high speed, and an onboard multiplexer make the ADS7842 ideal for battery-operated systems such as portable, multi-channel dataloggers and measurement equipment. The ADS7842 is available in an SSOP-28 package and is tested over the –40°C to +85°C temperature range. AIN0 AIN1 AIN2 AIN3 VREF A0 A1 4-Channel MUX SAR ADS7842 CDAC Comparator Output Latches and 3-State Drivers 3-State Parallel Data Bus CLK BUSY WR CS RD Please be aware that an important notice concerning avai...