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ADC12130CIN Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza ADC12130CIN
Descripción Electrónicos  Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold
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ADC12130CIN Datasheet(HTML) 1 Page - National Semiconductor (TI)

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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.
COPSmicrocontrollers, HPCand MICROWIREare trademarks of National Semiconductor Corporation.
DS012079-1
March 2000
© 2000 National Semiconductor Corporation
DS012079
www.national.com


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