LTC1090CSWPBF Linear Technology Corporation, LTC1090CSWPBF Datasheet

LTC1090CSWPBF

Manufacturer Part Number

LTC1090CSWPBF

Description

SOP20

Manufacturer

Linear Technology Corporation

Datasheet

1.LTC1090CSWPBF.pdf (28 pages)

Specifications of LTC1090CSWPBF

Date_code

07+

Current page: 1 of 28
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FEATURES

KEY SPECIFICATIO S

LTCMOS is a trademark of Linear Technology Corp.

TYPICAL APPLICATIO

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

Software Programmable Features:

Built-In Sample and Hold

Single Supply 5V, 10V or ±5V Operation

Direct 4 Wire Interface to Most MPU Serial Ports and

All MPU Parallel Ports

30kHz Maximum Throughput Rate

Resolution: 10 Bits

Total Unadjusted Error (LTC1090A): ±1/2LSB Max

Conversion Time: 22µs

Supply Current: 2.5mA Max, 1.0mA Typ

Unipolar/Bipolar Conversions

4 Differential/8 Single Ended Inputs

MSB or LSB First Data Sequence

Variable Data Word Length

–5V

(+)

(–)

BIPOLAR INPUT

DIFFERENTIAL

INPUT

UNIPOLAR

INPUTS

– UNIPOLAR

INPUT

LTC1090

SCLK

OUT

SERIAL DATA

LINK

APPLICATIONS INFORMATION

P1.1

P1.2

P1.3

P1.4

FOR 8051 CODE SEE

(e.g., 8051)

SECTION

MPU

LTC1090 • TA01

DESCRIPTIO

The LTC

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

verter. It uses LTCMOS

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’s

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 ±0.5LSB.

The LTC1090 is specified with offset and linearity less than

±0.5LSB but with a gain error limit of ±2LSB for

applications where gain is adjustable or less critical.

Single Chip 10-Bit Data

– 0.5

–1.0

1090 is a data acquisition component which

1.0

0.5

0.0

Acquisition System

Linearity Plot

OUTPUT CODE

switched capacitor technology

512

LTC1090

LTC1090 • TA02

1024

1090fc

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