LTC2410

1

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

The LTC

differential

∆Σ analog to digital converter with an inte-

grated oscillator, 2ppm INL and 0.16ppm RMS noise. It

uses delta-sigma technology and provides single cycle

settling time for multiplexed applications. Through a

single pin, the LTC2410 can be configured for better than

110dB input differential mode rejection at 50Hz or 60Hz

±2%, or it can be driven by an external oscillator for a user

defined rejection frequency. The internal oscillator re-

quires no external frequency setting components.

The converter accepts any external differential reference

remote sensing measurement configurations. The full-

LTC2410. The DC common mode input rejection is better

than 140dB.

The LTC2410 communicates through a flexible 3-wire

digital interface which is compatible with SPI and

MICROWIRE

s

Direct Sensor Digitizer

s

Weight Scales

s

Direct Temperature Measurement

s

Gas Analyzers

s

Strain-Gage Transducers

s

Instrumentation

s

Data Acquisition

s

Industrial Process Control

s

6-Digit DVMs

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

s

Differential Input and Differential Reference with

s

2ppm INL, No Missing Codes

s

2.5ppm Full-Scale Error

s

0.1ppm Offset

s

0.16ppm Noise

s

Single Conversion Settling Time for Multiplexed

Applications

s

Internal Oscillator—No External Components

Required

s

110dB Min, 50Hz/60Hz Notch Filter

s

24-Bit ADC in Narrow SSOP-16 Package

(SO-8 Footprint)

s

Single Supply 2.7V to 5.5V Operation

s

Low Supply Current (200

µA) and Auto Shutdown

s

Fully Differential Version of LTC2400

APPLICATIO S

FEATURES

DESCRIPTIO

24-Bit No Latency

with Differential Input and

Differential Reference

April 2000

Final Electrical Specifications

No Latency

∆Σ is a trademark of Linear Technology Corporation.

MICROWIRE is a trademark of National Semiconductor Corporation.

SCK

SDO

GND

CS

214

3

4

13

5

6

12

1, 7, 8, 9, 10, 15, 16

11

REFERENCE

VOLTAGE

ANALOG INPUT RANGE

= INTERNAL OSC/50Hz REJECTION

= EXTERNAL CLOCK SOURCE

= INTERNAL OSC/60Hz REJECTION

3-WIRE

SPI INTERFACE

1

µF

2.7V TO 5.5V

LTC2410

2410 TA01

LTC2410

GND

1

µF

SDO

3-WIRE

SPI INTERFACE

SCK

2410 TA02

CS

12

3

2

1, 7, 8

9, 10,

15, 16

14

5

6

4

13

11

BRIDGE

IMPEDANCE

100

Ω TO10k

TYPICAL APPLICATIO S