描述 Description

NOTE: Some of these devices may be obsolete and are described and shown here for reference only. See our web site for product availability.The ADC12030, and ADC12H030 families are 12-bit plus sign successive approximation Analog-to-Digital Converters with serial I/O and configurable input multiplexers. The ADC12034/ADC12H034 and ADC12038/ADC12H038 have 4 and 8 channel multiplexers, respectively. The differential multiplexer outputs and ADC inputs are available on the MUXOUT1, MUXOUT2, A/DIN1 and A/DIN2 pins. The ADC12030/ADC12H030 has a two channel multiplexer with the multiplexer outputs and ADC inputs internally connected. The ADC12030 family is tested with a 5 MHz clock, while the ADC12H030 family is tested with an 8 MHz clock. On request, these ADCs 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 obtained 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 NSC MICROWIRE. For voltage references see the LM4040, LM4050 or LM4041.

特性 Features

·Serial I/O (MICROWIRE Compatible)
·2, 4, or 8 Chan Differential or Single-Ended Multiplexer
·Analog Input Sample/Hold Function
·Power Down Mode
·Variable Resolution and Conversion Rate
·Programmable Acquisition Time
·Variable Digital Output Word Length and Format
·No Zero or Full Scale Adjustment Required
·Fully Tested and Ensured with a 4.096V Reference
·0V to 5V Analog Input Range with Single 5V Power Supply
·No Missing Codes over Temperature
Key Specifications ·Resolution 12-bit plus sign
·12-bit plus sign conversion time· ADC12H30 family 5.5 μs (max)
·ADC12030 family 8.8 μs (max)
·12-bit plus sign throughput time·ADC12H30 family 8.6 μs (max)
·ADC12030 family 14 μs (max)
·Integral Linearity Error ±1 LSB (max)
·Single Supply 5V ±10%
·Power consumption 33 mW (max)· Power down 100 μW (typ)
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