ADC12030
器件描述：Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold
器件厂商：NSC [National Semiconductor]
文件大小：1036.01KB，共41页
Sponsor by e络盟器件资料摘要：
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 witha5MHz
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-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™. For voltage references see the
LM4040 or LM4041.
Features
n Serial I/O (MICROWIRE Compatible)
n 2, 4, or 8 channel differential or single-ended multiplexer
n Analog input sample/hold function
n Power down mode
n Variable resolution and conversion rate
n Programmable acquisition time
n Variable digital output word length and format
n No zero or full scale adjustment required
n Fully tested and guaranteed with a 4.096V reference
n 0V to 5V analog input range with single 5V power
supply
n No Missing Codes over temperature
Key Specifications
n Resolution 12-bit plus sign
n 12-bit plus sign conversion time
— ADC12H030 family 5.5 µs (max)
— ADC12030 family 8.8 µs (max)
n 12-bit plus sign throughput time
— ADC12H030 family 8.6 µs (max)
— ADC12030 family 14 µs (max)
n Integral linearity error ±1 LSB (max)
n Single supply 5V ±10%
n Power dissipation 33 mW (max)
— Power down 100 µW (typ)
Applications
n Medical instruments
n Process control systems
n Test equipment
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
COPS™ microcontrollers, HPC™ and MICROWIRE™ are trademarks of National Semiconductor Corporation.
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
© 1999 National Semiconductor Corporation DS011354 www.national.com
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 witha5MHz
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-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™. For voltage references see the
LM4040 or LM4041.
Features
n Serial I/O (MICROWIRE Compatible)
n 2, 4, or 8 channel differential or single-ended multiplexer
n Analog input sample/hold function
n Power down mode
n Variable resolution and conversion rate
n Programmable acquisition time
n Variable digital output word length and format
n No zero or full scale adjustment required
n Fully tested and guaranteed with a 4.096V reference
n 0V to 5V analog input range with single 5V power
supply
n No Missing Codes over temperature
Key Specifications
n Resolution 12-bit plus sign
n 12-bit plus sign conversion time
— ADC12H030 family 5.5 µs (max)
— ADC12030 family 8.8 µs (max)
n 12-bit plus sign throughput time
— ADC12H030 family 8.6 µs (max)
— ADC12030 family 14 µs (max)
n Integral linearity error ±1 LSB (max)
n Single supply 5V ±10%
n Power dissipation 33 mW (max)
— Power down 100 µW (typ)
Applications
n Medical instruments
n Process control systems
n Test equipment
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
COPS™ microcontrollers, HPC™ and MICROWIRE™ are trademarks of National Semiconductor Corporation.
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
© 1999 National Semiconductor Corporation DS011354 www.national.com