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ADS7844EG4 Datasheet(PDF) 1 Page - Texas Instruments |
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ADS7844EG4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 22 page ADS7844 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 200kHz CONVERSION RATE q ±1 LSB MAX INL AND DNL q NO MISSING CODES q 72dB SINAD q SERIAL INTERFACE q 20-LEAD QSOP AND 20-LEAD SSOP PACKAGES q ALTERNATE SOURCE FOR MAX147 DESCRIPTION The ADS7844 is an 8-channel, 12-bit sampling analog-to- digital converter (ADC) with a synchronous serial interface. Typical power dissipation is 3mW at a 200kHz throughput rate and a +5V supply. The reference voltage (VREF) can be varied between 100mV and VCC, providing a corresponding input voltage range of 0V to VREF. The device includes a shutdown mode that reduces power dissipation to under 1 µW. 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. APPLICATIONS q DATA ACQUISITION q TEST AND MEASUREMENT q INDUSTRIAL PROCESS CONTROL q PERSONAL DIGITAL ASSISTANTS q BATTERY-POWERED SYSTEMS CDAC SAR Comparator Eight Channel Multiplexer Serial Interface and Control CH4 CH5 CH6 CH7 COM V REF CH0 CH1 CH2 CH3 CS SHDN DIN DOUT BUSY DCLK ADS7 844 ADS7844 SBAS100A – JANUARY 1998 – REVISED OCTOBER 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 © 1998-2003, 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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