ADC12138CIMSA National Semiconductor, ADC12138CIMSA Datasheet

ADC12138CIMSA

Manufacturer Part Number

ADC12138CIMSA

Description

Manufacturer

National Semiconductor

Datasheets

1.ADC12138CIMSA.pdf (42 pages)

2.ADC12138CIMSA.pdf (41 pages)

3.ADC12138CIMSA.pdf (41 pages)

Specifications of ADC12138CIMSA

Date_code

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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

NOTE: All versions of the ADC12132 are obsolete and

shown here for reference only.

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 and specified 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

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 obtained

even when the negative inputs are greater than the positive

because of the 12-bit plus sign output data format.

The ADC12132 is obsolete and described in this document

for reference only.

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

IRE

LM4041.

TRI-STATE

COPS

™

. For voltage references, see the LM4040, LM4050 or

microcontrollers, HPC

is a registered trademark of National Semiconductor Corporation.

1 LSB each.

™

and MICROWIRE

™

are trademarks of National Semiconductor Corporation.

DS012079

Features

n Serial I/O (MICROWIRE, SPI and QSPI Compatible)

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

Key Specifications

Applications

n Pen-based computers

n Digitizers

n Global positioning systems

Resolution

supply

12-Bit plus sign conversion time

12-Bit plus sign throughput time

Integral Linearity Error

Single Supply

Power Consumption

+3.3V

+3.3V power down

+5V

+5V power down

3.3V or 5V

12-bit plus sign

15 mW (max)

33 mW (max)

100 µW (typ)

8.8 µs (max)

2 LSB (max)

14 µs (max)

www.national.com

40 µW (typ)

April 2006

10%

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