LTC1090CJ Datasheet

IC型號(hào)：
LTC1090CJ
PDF描述：
Single Chip 10-Bit Data Acquisition System
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LTC1090

Single Chip 10-Bit Data

Acquisition System

FEATURES

鈻?/div>

DESCRIPTIO

鈻?/div>

Software Programmable Features:

Unipolar/Bipolar Conversions

4 Differential/8 Single Ended Inputs

MSB or LSB First Data Sequence

Variable Data Word Length

Built-In Sample and Hold

Single Supply 5V, 10V or

鹵5V

Operation

Direct 4 Wire Interface to Most MPU Serial Ports and

All MPU Parallel Ports

30kHz Maximum Throughput Rate

The LTC

廬

1090 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 10-bit unipolar, or 9-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.

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鈥檚

complement output coding in the bipolar mode. The

output data word can be programmed for a length of 8, 10,

12 or 16 bits. This allows easy interface to shift registers

and a variety of processors.

The LTC1090A is specified with total unadjusted error

(including the effects of offset, linearity and gain errors)

less than

鹵0.5LSB.

The LTC1090 is specified with offset and linearity less than

鹵0.5LSB

but with a gain error limit of

鹵2LSB

for

applications where gain is adjustable or less critical.

KEY SPECIFICATIO S

鈻?/div>

Resolution: 10 Bits

Total Unadjusted Error (LTC1090A):

鹵1/2LSB

Max

Conversion Time: 22碌s

Supply Current: 2.5mA Max, 1.0mA Typ

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

LTCMOS is a trademark of Linear Technology Corp.

TYPICAL APPLICATIO

LTC1090

DIFFERENTIAL

INPUT

BIPOLAR INPUT

鈥?V

OUT

UNIPOLAR

INPUTS

SCLK

FOR 8051 CODE SEE

APPLICATIONS INFORMATION

SECTION

MPU

(e.g., 8051)

1.0

0.5

ERROR (LSBs)

P1.1

P1.2

P1.3

P1.4

SERIAL DATA

LINK

0.0

鈥?0.5

鈥?.0

512

OUTPUT CODE

LTC1090 鈥?TA02

(+)

(鈥?

鈥?UNIPOLAR

INPUT

LTC1090 鈥?TA01

鈥?V

Linearity Plot

1024

1090fc

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