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ADC12130CIN Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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ADC12130CIN Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 41 page ADC12130/ADC12132/ADC12138 Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold General Description The ADC12130, ADC12132 and ADC12138 are 12-bit plus sign successive approximation A/D converters with serial I/O and configurable input multiplexer. The ADC12132 and ADC12138 have a 2 and an 8 channel multiplexer, respec- tively. The differential multiplexer outputs and A/D inputs are available on the MUXOUT1, MUXOUT2, A/DIN1 and A/DIN2 pins. The ADC12130 has a two channel multiplexer with the multiplexer outputs and A/D inputs internally connected. The ADC12130 family is tested with a 5 MHz clock. On request, these A/Ds go through a self calibration process that adjusts linearity, zero and full-scale errors to typically 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. Features n Serial I/O (MICROWIRE, SPI and QSPI Compatible) n 2 or 8 channel differential or single-ended multiplexer n Analog input sample/hold function n Power down mode n Programmable acquisition time n Variable digital output word length and format n No zero or full scale adjustment required n 0V to 5V analog input range with single 5V power supply Key Specifications n Resolution: 12-bit plus sign n 12-bit plus sign conversion time: 8.8 µs (max) n 12-bit plus sign throughput time: 14 µs (max) n Integral linearity error: ±2 LSB (max) n Single supply: 3.3V or 5V ±10% n Power consumption — 3.3V 15 mW (max) — 3.3V power down 40 µW (typ) — 5V 33 mW (max) — 5V power down 100 µW (typ) Applications n Pen-based computers n Digitizers n Global positioning systems ADC12138 Simplified Block Diagram TRI-STATE® is a registered trademark of National Semiconductor Corporation. COPS™ microcontrollers, HPC™ and MICROWIRE™ are trademarks of National Semiconductor Corporation. DS012079-1 March 2000 © 2000 National Semiconductor Corporation DS012079 www.national.com |
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