ADS7844 Datasheet | Burr-Brown

ADS7844 ADS7844 SBAS100A - JANUARY 1998 - REVISED OCTOBER 2003 12-Bit, 8-Channel Serial Output Sampling ANALOG-TO-DIGITAL CONVERTER Features q SINGLE SUPPLY: 2.7V to 5V q 8-CHANNEL SINGLE-ENDED OR 4-CHANNEL DIFFERENTIAL INPUT q UP TO 200k Hz CONVERSION RATE q ±1 LSB MAX INL AND DNL q NO MISSING CODES q 72d B SINAD q SERIAL INTERFACE q 20-LEAD QSOP AND 20-LEAD SSOP PACKAGES q ALTERNATE SOURCE FOR MAX147 APPLICATIONS q DATA ACQUISITION q TEST AND MEASUREMENT q INDUSTRIAL PROCESS CONTROL q PERSONAL DIGITAL ASSISTANTS q BATTERY-POWERED SYSTEMS DESCRIPTION The ADS7844 is an 8-channel, 12-bit sampling analog-todigital converter (ADC) with a synchronous serial interface. Typical power dissipation is 3m W at a 200k Hz throughput rate and a +5V supply. The reference voltage (VREF) can be varied between 100m V and VCC, providing a corresponding input voltage range of 0V to VREF. The device includes a shutdown mode that reduces power dissipation to under 1µW. The ADS7844 is ensured down to 2.7V operation. Low power, high speed, and onboard multiplexer make the ADS7844 ideal for battery-operated systems such as personal digital assistants, portable multichannel data loggers, and measurement equipment. The serial interface also provides low-cost isolation for remote data acquisition. The ADS7844 is available in a 20-lead QSOP package and the MAX147 equivalent 20-lead SSOP package and is ensured over the - 40°C to +85°C temperature range. CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 VREF Eight Channel Multiplexer CDAC parator Serial Interface and Control DCLK CS SHDN DIN DOUT BUSY 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. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the...