LTC1290DC datasheet, PDF - EEWORLD Datasheet

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LTC1290DC: Description8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20; Categorysemiconductor logic; File Size304KB，28 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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LTC1290DC Overview

8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20

LTC1290DC Parametric

Parameter Name	Attribute value
Number of functions	1
Number of terminals	20
Maximum operating temperature	85 Cel
Minimum operating temperature	-40 Cel
Rated supply voltage	5 V
Maximum conversion time	13 uS
Maximum linear error	0.0122 %
Maximum limit analog input voltage	5.05 V
Minimum limit analog input voltage	-5.05 V
Processing package description	0.300 INCH, PLASTIC, DIP-20
state	ACTIVE
Craftsmanship	CMOS
packaging shape	RECTANGULAR
Package Size	IN-LINE
Terminal form	THROUGH-HOLE
Terminal spacing	2.54 mm
terminal coating	TIN LEAD
Terminal location	DUAL
Packaging Materials	PLASTIC/EPOXY
Temperature level	INDUSTRIAL
Rated negative supply voltage	-5 V
Sampling Rate	0.0500 MHz
Output format	SERIAL
Type of converter	SUCCESSIVE APPROXIMATION
Number of digits	12
Output bit encoding	2S COMPLEMENT BINARY
Number of analog channels	8
Sample and hold and track and hold	SAMPLE

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LTC1290

Single Chip 12-Bit Data

Acquisition System

FEATURES

DESCRIPTIO

Software Programmable Features

– Unipolar/Bipolar Conversion

– Four Differential/Eight Single-Ended Inputs

– MSB- or LSB-First Data Sequence

– Variable Data Word Length

– Power Shutdown

Built-In Sample-and-Hold

Single Supply 5V or

±5V

Operation

Direct Four-Wire Interface to Most MPU Serial Ports

and All MPU Parallel Ports

50kHz Maximum Throughput Rate

The LTC

1290 is a data acquisition component which

contains a serial I/O successive approximation A/D con-

verter. It uses LTCMOS

switched capacitor technology

to perform either 12-bit unipolar or 11-bit plus sign bipolar

A/D conversions. The 8-channel input multiplexer can be

configured for either single-ended or differential inputs (or

combinations thereof). An on-chip sample-and-hold is

included for all single-ended input channels. When the

LTC1290 is idle it can be powered down with a serial word

in applications where low power consumption is desired.

The serial I/O is designed to be compatible with industry

standard full duplex serial interfaces. It allows either MSB-

or LSB-first data and automatically provides 2's comple-

ment output coding in the bipolar mode. The output data

word can be programmed for a length of 8, 12 or 16 bits.

This allows easy interface to shift registers and a variety of

processors.

, LTC and LT are registered trademarks of Linear Technology Corporation.

LTCMOS is a trademark of Linear Technology Corporation.

KEY SPECIFICATIO S

Resolution: 12 Bits

Fast Conversion Time: 13µs Max Over Temp

Low Supply Current: 6.0mA

TYPICAL APPLICATI

SINGLE-ENDED INPUT

0V TO 5V OR

±5V

±15V

OVERVOLTAGE RANGE*

12-Bit 8-Channel Sampling Data Acquisition System

CH0

CH1

CH2

CH3

DIFFERENTIAL INPUT (+)

±5V

COMMON MODE RANGE (–)

CH4

CH5

LTC1290

ACLK

SCLK

OUT

REF

–

•

22µF

TANTALUM

1N5817

TO AND FROM

MICROPROCESSOR

•

CH6

CH7

COM

DGND

4.7µF

TANTALUM

–5V

1N5817

0.1µF

AGND

* FOR OVERVOLTAGE PROTECTION ON ONLY ONE CHANNEL LIMIT THE INPUT CURRENT TO 15mA. FOR OVERVOLTAGE PROTECTION

ON MORE THAN ONE CHANNEL LIMIT THE INPUT CURRENT TO 7mA PER CHANNEL AND 28mA FOR ALL CHANNELS. (SEE SECTION ON

OVERVOLTAGE PROTECTION IN THE APPLICATIONS INFORMATION SECTION.) CONVERSION RESULTS ARE NOT VALID WHEN THE SELECTED

OR ANY OTHER CHANNEL IS OVERVOLTAGED (V

< V

–

OR V

> V

1N4148

1027

8V TO 40V

1µF

1290 • TA01

LTC1290DC Related Products

	LTC1290DC	LTC1290DM	LTC1290DI	LTC1290CM	LTC1290CC	LTC1290BM	LTC1290BI	LTC1290CI	LTC1290BC
Description	8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20	8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20	8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20	8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20	8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20	8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20	8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20	8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20	8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20
Number of functions	1	1	1	1	1	1	1	1	1
Number of terminals	20	20	20	20	20	20	20	20	20
Maximum operating temperature	85 Cel	85 Cel	85 Cel	85 Cel	85 Cel	85 Cel	85 Cel	85 Cel	85 Cel
Minimum operating temperature	-40 Cel	-40 Cel	-40 Cel	-40 Cel	-40 Cel	-40 Cel	-40 Cel	-40 Cel	-40 Cel
Rated supply voltage	5 V	5 V	5 V	5 V	5 V	5 V	5 V	5 V	5 V
Maximum conversion time	13 uS	13 uS	13 uS	13 uS	13 uS	13 uS	13 uS	13 uS	13 uS
Maximum linear error	0.0122 %	0.0122 %	0.0122 %	0.0122 %	0.0122 %	0.0122 %	0.0122 %	0.0122 %	0.0122 %
Maximum limit analog input voltage	5.05 V	5.05 V	5.05 V	5.05 V	5.05 V	5.05 V	5.05 V	5.05 V	5.05 V
Minimum limit analog input voltage	-5.05 V	-5.05 V	-5.05 V	-5.05 V	-5.05 V	-5.05 V	-5.05 V	-5.05 V	-5.05 V
Processing package description	0.300 INCH, PLASTIC, DIP-20	0.300 INCH, PLASTIC, DIP-20	0.300 INCH, PLASTIC, DIP-20	0.300 INCH, PLASTIC, DIP-20	0.300 INCH, PLASTIC, DIP-20	0.300 INCH, PLASTIC, DIP-20	0.300 INCH, PLASTIC, DIP-20	0.300 INCH, PLASTIC, DIP-20	0.300 INCH, PLASTIC, DIP-20
state	ACTIVE	ACTIVE	ACTIVE	ACTIVE	ACTIVE	ACTIVE	ACTIVE	ACTIVE	ACTIVE
Craftsmanship	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
packaging shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package Size	IN-LINE	IN-LINE	IN-LINE	IN-LINE	IN-LINE	IN-LINE	IN-LINE	IN-LINE	IN-LINE
Terminal form	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE
Terminal spacing	2.54 mm	2.54 mm	2.54 mm	2.54 mm	2.54 mm	2.54 mm	2.54 mm	2.54 mm	2.54 mm
terminal coating	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
Packaging Materials	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Rated negative supply voltage	-5 V	-5 V	-5 V	-5 V	-5 V	-5 V	-5 V	-5 V	-5 V
Sampling Rate	0.0500 MHz	0.0500 MHz	0.0500 MHz	0.0500 MHz	0.0500 MHz	0.0500 MHz	0.0500 MHz	0.0500 MHz	0.0500 MHz
Output format	SERIAL	SERIAL	SERIAL	SERIAL	SERIAL	SERIAL	SERIAL	SERIAL	SERIAL
Type of converter	SUCCESSIVE APPROXIMATION	SUCCESSIVE APPROXIMATION	SUCCESSIVE APPROXIMATION	SUCCESSIVE APPROXIMATION	SUCCESSIVE APPROXIMATION	SUCCESSIVE APPROXIMATION	SUCCESSIVE APPROXIMATION	SUCCESSIVE APPROXIMATION	SUCCESSIVE APPROXIMATION
Number of digits	12	12	12	12	12	12	12	12	12
Output bit encoding	2S COMPLEMENT BINARY	2S COMPLEMENT BINARY	2S COMPLEMENT BINARY	2S COMPLEMENT BINARY	2S COMPLEMENT BINARY	2S COMPLEMENT BINARY	2S COMPLEMENT BINARY	2S COMPLEMENT BINARY	2S COMPLEMENT BINARY
Number of analog channels	8	8	8	8	8	8	8	8	8
Sample and hold and track and hold	SAMPLE	SAMPLE	SAMPLE	SAMPLE	SAMPLE	SAMPLE	SAMPLE	SAMPLE	SAMPLE

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