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LM4040AI-4.1 Datasheet

  • LM4040AI-4.1

  • Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters ...

  • 41頁(yè)

  • NSC

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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
July 1999
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
The ADC12030, and ADC12H030 families are 12-bit plus
sign successive approximation A/D converters with serial I/O
and configurable input multiplexers. The ADC12032/
ADC12H032, ADC12034/ADC12H034 and ADC12038/
ADC12H038 have 2, 4 and 8 channel multiplexers, respec-
tively. 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 multi-
plexer with the multiplexer outputs and A/D 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 A/Ds go through a self calibration
process that adjusts linearity, zero and full-scale errors to
less than
鹵
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 MICROWIRE
鈩?/div>
. For voltage references see the
LM4040 or LM4041.
Features
Serial I/O (MICROWIRE Compatible)
2, 4, or 8 channel 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
n
No Missing Codes over temperature
n
n
n
n
n
n
n
n
n
n
Key Specifications
n
Resolution
n
12-bit plus sign conversion time
鈥?ADC12H030 family
鈥?ADC12030 family
n
12-bit plus sign throughput time
鈥?ADC12H030 family
鈥?ADC12030 family
n
Integral linearity error
n
Single supply
n
Power dissipation
鈥?Power down
12-bit plus sign
5.5 碌s (max)
8.8 碌s (max)
8.6 碌s (max)
14 碌s (max)
鹵
1 LSB (max)
5V
鹵
10%
33 mW (max)
100 碌W (typ)
Applications
n
Medical instruments
n
Process control systems
n
Test equipment
TRI-STATE
廬
is a registered trademark of National Semiconductor Corporation.
COPS
鈩?/div>
microcontrollers, HPC
鈩?/div>
and MICROWIRE
鈩?/div>
are trademarks of National Semiconductor Corporation.
漏 1999 National Semiconductor Corporation
DS011354
www.national.com

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