LTC1291CMJ8 datasheet, PDF - EEWORLD Datasheet

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LTC1291CMJ8: Description2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8; CategoryAnalog mixed-signal IC converter; File Size302KB，20 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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LTC1291CMJ8 Overview

2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8

LTC1291CMJ8 Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	Linear ( ADI )
Parts packaging code	DIP
package instruction	DIP, DIP8,.3
Contacts	8
Reach Compliance Code	compli
ECCN code	EAR99
Maximum analog input voltage	5.05 V
Minimum analog input voltage	-0.05 V
Maximum conversion time	12 µs
Converter type	ADC, SUCCESSIVE APPROXIMATION
JESD-30 code	R-GDIP-T8
JESD-609 code	e0
Maximum linear error (EL)	0.0122%
Number of analog input channels	2
Number of digits	12
Number of functions	1
Number of terminals	8
Maximum operating temperature	125 °C
Minimum operating temperature	-55 °C
Output bit code	BINARY
Output format	SERIAL
Package body material	CERAMIC, GLASS-SEALED
encapsulated code	DIP
Encapsulate equivalent code	DIP8,.3
Package shape	RECTANGULAR
Package form	IN-LINE
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
power supply	5 V
Certification status	Not Qualified
Sample and hold/Track and hold	SAMPLE
Maximum seat height	5.08 mm
Nominal supply voltage	5 V
surface mount	NO
technology	CMOS
Temperature level	MILITARY
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	THROUGH-HOLE
Terminal pitch	2.54 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	7.62 mm

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LTC1291

Single Chip 12-Bit

Data Acquisition System

FEATURES

DESCRIPTIO

Built-In Sample-and-Hold

Single Supply 5V Operation

Power Shutdown

Direct 3- or 4-Wire Interface to Most MPU Serial

Ports and All MPU Parallel Ports

Two-Channel Analog Multiplexer

Analog Inputs Common Mode to Supply Rails

8-Pin DIP Package

KEY SPECIFICATIO S

The LTC1291 is a data acquisition system that contains a

serial I/O successive approximation A/D converter. It uses

LTCMOS

switched capacitor technology to perform a

12-bit unipolar A/D conversion. The input multiplexer can

be configured for either single-ended or differential in-

puts. An on-chip sample-and-hold is included on the “+”

input. When the LTC1291 is idle, it can be powered down

in applications where low power consumption is desired.

An external reference is not required because the LTC1291

takes its reference from the power supply (V

). All these

features are packaged in an 8-pin DIP.

The serial I/O is designed to communicate without external

hardware to most MPU serial ports and all MPU parallel

I/O ports allowing data to be transmitted over three or four

wires. Given the accuracy, ease of use and small package

size, this device is well suited for digitizing analog signals

in remote applications where minimum number of inter-

connects, small physical size, and low power consump-

tion are important.

LTCMOS

is a trademark of Linear Technology Corporation

Resolution: 12 Bits

Fast Conversion Time: 12µs Max Over Temp.

Low Supply Current:

6.0mA (Typ) Active Mode

10µA (Max) Shutdown Mode

TYPICAL APPLICATI

2-Channel 12-Bit Data Acquisition System

22µF

TANTALUM

+5V

0.5

0.4

0.3

CH0

2-CHANNEL

MUX*

CH1

GND

DELTA (LSB)

REF

)

0.1µF

CLK

LTC1291

OUT

SCK

MC68HC11

MISO

MOSI

1291 TA01

*FOR OVERVOLTAGE PROTECTION LIMIT THE INPUT CURRENT TO 15mA

PER PIN OR CLAMP THE INPUTS TO V

AND GND WITH 1N4148 DIODES.

CONVERSION RESULTS ARE NOT VALID WHEN THE SELECTED CHANNEL OR

THE OTHER CHANNEL IS OVERVOLTAGED (V

< GND OR V

> V

). SEE

SECTION ON OVERVOLTAGE PROTECTION IN THE APPLICATIONS INFORMATION.

Channel-to-Channel

INL Matching

0.2

0.1

–0.1

–0.2

–0.3

–0.4

–0.5

512 1024 1536 2048 2560 3072 3584 4096

CODE

1291 TA02

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