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ADC10738CIWM Fiches technique(PDF) 1 Page - National Semiconductor (TI) |
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ADC10738CIWM Fiches technique(HTML) 1 Page - National Semiconductor (TI) |
1 / 27 page ADC10731/ADC10732/ADC10734/ADC10738 10-Bit Plus Sign Serial I/O A/D Converters with Mux, Sample/Hold and Reference General Description This series of CMOS 10-bit plus sign successive approxima- tion A/D converters features versatile analog input multiplex- ers, sample/hold and a 2.5V band-gap reference. The 1-, 2-, 4-, or 8-channel multiplexers can be software configured for single-ended or differential mode of operation. An input sample/hold is implemented by a capacitive refer- ence ladder and sampled-data comparator. This allows the analog input to vary during the A/D conversion cycle. In the differential mode, valid outputs are obtained even when the negative inputs are greater than the positive be- cause of the 10-bit plus sign output data format. The serial I/O is configured to comply with the NSC MI- CROWIRE™ serial data exchange standard for easy inter- face to the COPS™ and HPC™ families of controllers, and can easily interface with standard shift registers and micro- processors. Features n 0V to 5V analog input range with single 5V power supply n Serial I/O (MICROWIRE compatible) n 1-, 2-, 4-, or 8-channel differential or single-ended multiplexer n Software or hardware power down n Analog input sample/hold function n Ratiometric or absolute voltage referencing n No zero or full scale adjustment required n No missing codes over temperature n TTL/CMOS input/output compatible n Standard DIP and SO packages Key Specifications n Resolution 10 bits plus sign n Single supply 5V n Power dissipation 37 mW (Max) n In powerdown mode 18 µW n Conversion time 5µs (Max) n Sampling rate 74 kHz (Max) n Band-gap reference 2.5V ±2% (Max) Applications n Medical instruments n Portable and remote instrumentation n Test equipment ADC10738 Simplified Block Diagram COPS™, HPC™ and MICROWIRE™ are trademarks of National Semiconductor Corporation. DS011390-1 May 1999 © 1999 National Semiconductor Corporation DS011390 www.national.com |
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