4 Channel/ 16-Bit Sampling CMOS A/D Converter
®
ADS
782
5
ADS7825
782 5
ADS
www.burr-brown.com/databook/ADS7825.html
4 Channel, 16-Bit Sampling CMOS A/D Conver...
Description
®
ADS
782
5
ADS7825
782 5
ADS
www.burr-brown.com/databook/ADS7825.html
4 Channel, 16-Bit Sampling CMOS A/D Converter
FEATURES
q 25µs max SAMPLING AND CONVERSION q SINGLE +5V SUPPLY OPERATION q PIN-COMPATIBLE WITH 12-BIT ADS7824 q PARALLEL AND SERIAL DATA OUTPUT q 28-PIN 0.3" PLASTIC DIP AND SOIC q ±2.0 LSB max INL q 50mW max POWER DISSIPATION q 50µW POWER DOWN MODE q ±10V INPUT RANGE, FOUR CHANNEL MULTIPLEXER q CONTINUOUS CONVERSION MODE
DESCRIPTION
The ADS7825 can acquire and convert 16 bits to within ±2.0 LSB in 25µs max while consuming only 50mW max. Laser-trimmed scaling resistors provide the standard industrial ±10V input range and channelto-channel matching of ±0.1%. The ADS7825 is a low-power 16-bit sampling A/D with a four channel input multiplexer, S/H, clock, reference, and a parallel/serial microprocessor interface. It can be configured in a continuous conversion mode to sequentially digitize all four channels. The 28-pin ADS7825 is available in a plastic 0.3" DIP and in a SOIC, both fully specified for operation over the industrial –40°C to +85°C range.
Continuous Conversion 40kΩ AIN0 Clock 20kΩ 40kΩ AIN1 20kΩ 40kΩ AIN2 20kΩ 40kΩ AIN3 20kΩ 8kΩ CAP 6kΩ REF 8kΩ 8kΩ 8kΩ CDAC CONTC
Channel A0 A1 R/C CS PWRD
Successive Approximation Register and Control Logic
BUSY Serial Comparator Data Out or Parallel Data Out Buffer Internal +2.5V Ref 8 D7-D0 BYTE SDATA DATACLK
International Airport Industrial Park Mailing Address: PO Box 11400, Tucson, AZ 85734 Stre...
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