參數(shù)資料
型號(hào): ADC10732CIWM
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: ADC
英文描述: 10-Bit Plus Sign Serial I/O A/D Converters with Mux,
中文描述: 2-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
封裝: SOP-20
文件頁數(shù): 1/27頁
文件大小: 556K
代理商: ADC10732CIWM
ADC10731/ADC10732/ADC10734/ADC10738
10-Bit Plus Sign Serial I/O A/D Converters with Mux,
Sample/Hold and Reference
General Description
This series of CMOS 10-bit plus sign successive approxima-
tion A/D converters features versatile analog input multiplex-
ers, sample/hold and a 2.5V band-gap reference. The 1-, 2-,
4-, or 8-channel multiplexers can be software configured for
single-ended or differential mode of operation.
An input sample/hold is implemented by a capacitive refer-
ence ladder and sampled-data comparator. This allows the
analog input to vary during the A/D conversion cycle.
In the differential mode, valid outputs are obtained even
when the negative inputs are greater than the positive be-
cause of the 10-bit plus sign output data format.
The serial I/O is configured to comply with the NSC MI-
CROWIRE
serial data exchange standard for easy inter-
face to the COPS
and HPC
families of controllers, and
can easily interface with standard shift registers and micro-
processors.
Features
n
0V to 5V analog input range with single 5V power
supply
n
Serial I/O (MICROWIRE compatible)
n
1-, 2-, 4-, or 8-channel differential or single-ended
multiplexer
n
Software or hardware power down
n
Analog input sample/hold function
n
Ratiometric or absolute voltage referencing
n
No zero or full scale adjustment required
n
No missing codes over temperature
n
TTL/CMOS input/output compatible
n
Standard DIP and SO packages
Key Specifications
n
Resolution
n
Single supply
n
Power dissipation
n
In powerdown mode
n
Conversion time
n
Sampling rate
n
Band-gap reference
10 bits plus sign
5V
37 mW (Max)
18 μW
5μs (Max)
74 kHz (Max)
2.5V
±
2% (Max)
Applications
n
Medical instruments
n
Portable and remote instrumentation
n
Test equipment
ADC10738 Simplified Block Diagram
COPS
, HPC
and MICROWIRE
are trademarks of National Semiconductor Corporation.
DS011390-1
May 1999
A
S
1999 National Semiconductor Corporation
DS011390
www.national.com
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