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ADC12038CIWM Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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ADC12038CIWM Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 41 page  ADC12H030/ADC12H032/ADC12H034/ADC12H038, ADC12030/ADC12032/ADC12034/ADC12038 Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold General Description The ADC12030, and ADC12H030 families are 12-bit plus sign successive approximation A/D converters with serial I/O and configurable input multiplexers. The ADC12032/ ADC12H032, ADC12034/ADC12H034 and ADC12038/ ADC12H038 have 2, 4 and 8 channel multiplexers, respec- tively. The differential multiplexer outputs and A/D inputs are available on the MUXOUT1, MUXOUT2, A/DIN1 and A/DIN2 pins. The ADC12030/ADC12H030 has a two channel multi- plexer with the multiplexer outputs and A/D inputs internally connected. The ADC12030 family is tested witha5MHz clock, while the ADC12H030 family is tested with an 8 MHz clock. On request, these A/Ds go through a self calibration process that adjusts linearity, zero and full-scale errors to less than ±1 LSB each. The analog inputs can be configured to operate in various combinations of single-ended, differential, or pseudo-differential modes. A fully differential unipolar analog input range (0V to +5V) can be accommodated with a single +5V supply. In the differential modes, valid outputs are ob- tained even when the negative inputs are greater than the positive because of the 12-bit plus sign output data format. The serial I/O is configured to comply with the NSC MI- CROWIRE. For voltage references see the LM4040 or LM4041. Applications n Medical instruments n Process control systems n Test equipment Features n Serial I/O (MICROWIRE Compatible) n 2, 4, or 8 channel differential or single-ended multiplexer n Analog input sample/hold function n Power down mode n Variable resolution and conversion rate n Programmable acquisition time n Variable digital output word length and format n No zero or full scale adjustment required n Fully tested and guaranteed with a 4.096V reference n 0V to 5V analog input range with single 5V power supply n No Missing Codes over temperature Key Specifications j Resolution 12-bit plus sign j 12-bit plus sign conversion time – ADC12H30 family 5.5 µs (max) – ADC12030 family 8.8 µs (max) j 12-bit plus sign throughput time – ADC12H30 family 8.6 µs (max) – ADC12030 family 14 µs (max) j Integral linearity error ±1 LSB (max) j single supply 5V ±10% j Power consumption 33 mW (max) – Power down 100 µW (typ) June 2002 © 2002 National Semiconductor Corporation DS011354 www.national.com |
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