ADC12130_06 Datasheet, PDF (1/42 Pages) National Semiconductor (TI) – Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold

April 2006
ADC12130/ADC12132/ADC12138
Self-Calibrating 12-Bit Plus Sign Serial I/O A/D
Converters with MUX and Sample/Hold
General Description
NOTE: All versions of the ADC12132 are obsolete and
shown here for reference only.
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 and specified 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 obtained
even when the negative inputs are greater than the positive
because of the 12-bit plus sign output data format.
The ADC12132 is obsolete and described in this document
for reference only.
The serial I/O is configured to comply with NSC MICROW-
IRE™. For voltage references, see the LM4040, LM4050 or
LM4041.
Features
n Serial I/O (MICROWIRE, SPI and QSPI Compatible)
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
Resolution
j 12-Bit plus sign conversion time
j 12-Bit plus sign throughput time
j Integral Linearity Error
j Single Supply
j Power Consumption
+3.3V
+3.3V power down
+5V
+5V power down
12-bit plus sign
8.8 µs (max)
14 µs (max)
±2 LSB (max)
3.3V or 5V ±10%
15 mW (max)
40 µW (typ)
33 mW (max)
100 µW (typ)
Applications
n Pen-based computers
n Digitizers
n Global positioning systems
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© 2006 National Semiconductor Corporation DS012079
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