LTC2418CGNPBF Linear Technology Corporation, LTC2418CGNPBF Datasheet

LTC2418CGNPBF

Manufacturer Part Number

LTC2418CGNPBF

Description

SSOP28

Manufacturer

Linear Technology Corporation

Datasheets

1.LTC2418IGNPBF.pdf (48 pages)

2.LTC2418IGNPBF.pdf (48 pages)

Specifications of LTC2418CGNPBF

Date_code

08+

Current page: 1 of 48
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FEATURES

■

APPLICATIO S

TYPICAL APPLICATIO

THERMOCOUPLE

8-/16-Channel Single-Ended or 4-/8-Channel

Differential Inputs (LTC2414/LTC2418)

Low Supply Current (200µA, 4µA in Autosleep)

Differential Input and Differential Reference

with GND to V

2ppm INL, No Missing Codes

2.5ppm Full-Scale Error and 0.5ppm Offset

0.2ppm Noise

No Latency: Digital Filter Settles in a Single Cycle

Each Conversion Is Accurate, Even After a New

Channel is Selected

Single Supply 2.7V to 5.5V Operation

Internal Oscillator—No External Components

Required

110dB Min, 50Hz/60Hz Notch Filter

Direct Sensor Digitizer

Weight Scales

Direct Temperature Measurement

Gas Analyzers

Strain Gauge Transducers

Instrumentation

Data Acquisition

Industrial Process Control

CH0

CH1

CH7

CH8

CH15

COM

REF

GND

Common Mode Range

•

–

16-CHANNEL

MUX

–

24-BIT ∆Σ ADC

DIFFERENTIAL

REF

2.7V TO 5.5V

LTC2418

241418 TA01a

SDO

SCK

SDI

24-Bit No Latency ∆Σ

1µF

DESCRIPTIO

The LTC

ential) micropower 24-bit ∆Σ analog-to-digital convert-

ers. They operate from 2.7V to 5.5V and include an

integrated oscillator, 2ppm INL and 0.2ppm RMS noise.

They use delta-sigma technology and provide single cycle

settling time for multiplexed applications. Through a

single pin, the LTC2414/LTC2418 can be configured for

better than 110dB differential mode rejection at 50Hz or

60Hz ±2%, or they can be driven by an external oscillator

for a user-defined rejection frequency. The internal oscil-

lator requires no external frequency setting components.

The LTC2414/LTC2418 accept any external differential

reference voltage from 0.1V to V

and remote sensing measurement applications. They can

be configured to take 4/8 differential channels or

8/16 single-ended channels. The full-scale bipolar input

range is from – 0.5V

mode voltage, V

age, V

The DC common mode input rejection is better than 140dB.

The LTC2414/LTC2418 communicate through a flexible

4-wire digital interface that is compatible with SPI and

MICROWIRE

No Latency ∆Σ is a trademark of Linear Technology Corporation. All other trademarks are the

property of their respective owners.

4-WIRE

SPI INTERFACE

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

= 50Hz REJECTION

= EXTERNAL OSCILLATOR

= 60Hz REJECTION

INCM

2414/LTC2418 are 8-/16-channel (4-/8-differ-

, may be independently set within GND to V

protocols.

REFCM

REF

LTC2414/LTC2418

, and the input common mode volt-

to 0.5V

8-/16-Channel

–1

–2

–3

–2.5 –2

REF

INCM

Total Unadjusted Error

= GND

= 5V

–1.5

. The reference common

= V

vs Input Voltage

for flexible ratiometric

REFCM

–1

INPUT VOLTAGE (V)

–0.5

= 2.5V

0.5

ADCs

1.0

= –45°C

= 25°C

1.5

2414/18 TA01b

= 85°C

241418fa

2.0

2.5

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