ADC12138

更新时间： 2024-11-18 22:53:35

品牌	Logo	应用领域
美国国家半导体 - NSC		转换器
页数	文件大小	规格书
41页	1086K
描述
Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold

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ADC12138 数据手册

March 2000

ADC12130/ADC12132/ADC12138

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

Converters with MUX and Sample/Hold

General Description

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

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

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

linearity, zero and full-scale errors to typically less than

LSB each.

Key Specifications

The analog inputs can be configured to operate in various

combinations of single-ended, differential, or

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)

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.

n Integral linearity error:

2 LSB (max)

n Single supply: 3.3V or 5V 10%

n Power consumption

— 3.3V

15 mW (max)

40 µW (typ)

33 mW (max)

100 µW (typ)

The serial I/O is configured to comply with the NSC MI-

— 3.3V power down

— 5V

— 5V power down

™

CROWIRE . For voltage references, see the LM4040 or

LM4041.

Applications

n Pen-based computers

n Digitizers

n Global positioning systems

ADC12138 Simplified Block Diagram

DS012079-1

TRI-STATE^®is a registered trademark of National Semiconductor Corporation.

™

COPS microcontrollers, HPC and MICROWIRE are trademarks of National Semiconductor Corporation.

DS012079

www.national.com

12 3 4 5 6 7...41

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与ADC12138相关器件

型号	品牌	获取价格	描述	数据表
ADC12138CIMSA	NSC	获取价格	Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold
ADC12138CIMSA	TI	获取价格	ADC12130/ADC12132/ADC12138 Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters wit
ADC12138CIMSAX	TI	获取价格	ADC12130/ADC12132/ADC12138 Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters wit
ADC12138CIMSAX/NOPB	TI	获取价格	Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converter with MUX and Sample/Hold 28-SSO
ADC12138CIN	NSC	获取价格	Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold
ADC12138CIWM	NSC	获取价格	Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold
ADC12138CIWM	TI	获取价格	Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converter with MUX and Sample/Hold 28-SOI
ADC12138CIWM/NOPB	NSC	获取价格	IC 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO28, SSOP-28, Analog to Dig
ADC12138CIWM/NOPB	TI	获取价格	Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold
ADC12138CIWM/NOPB	ROCHESTER	获取价格	8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO28, SSOP-28

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