ADC12030_07 Datasheet, PDF (1/44 Pages) National Semiconductor (TI) – Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold

April 2007
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
Some device/package combinations are obsolete and
shown for reference only.
The ADC12030, and ADC12H030 families are 12-bit plus sign
successive approximation A/D converters with serial I/O and
configurable input multiplexers. The ADC12034/ADC12H034
and ADC12038/ADC12H038 have 4 and 8 channel multiplex-
ers, respectively. 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 multiplexer with the multiplexer outputs and A/D in-
puts 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 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-differ-
ential 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 be-
cause 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.
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 guaranteed 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 conversion time
– ADC12H30 family
– ADC12030 family
■ 12-bit plus sign throughput time
– ADC12H30 family
– ADC12030 family
■ Integral Linearity Error
■ Single Supply
■ Power consumption
– Power down
12-bit plus sign
5.5 µs (max)
8.8 µs (max)
8.6 µs (max)
14 µs (max)
±1 LSB (max)
5V ±10%
33 mW (max)
100 µW (typ)
Applications
■ ^{Medical instruments}
■ ^{Process control systems}
■ ^{Test equipment}
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