Linear Technology LTC2433-1CMS, 16-Bit Differential ADC in MS10 Package (req DC590) DC745A DC745A Scheda Tecnica

LTC2433-1

1

24331fa

The LTC

®

2433-1 is a differential input micropower 16-bit

No Latency 

∆Σ

TM

 analog-to-digital converter with an inte-

grated oscillator. It provides 0.12LSB INL and 1.45

µ

V

RMS noise independent of V

REF

. It uses delta-sigma

technology and provides single conversion settling of the
digital filter. Through a single pin, the LTC2433-1 can be
configured for better than 87dB input differential mode
rejection at 50Hz and 60Hz 

±

2%, or it can be driven by an

external oscillator for a user defined rejection frequency.
The internal oscillator requires no external frequency
setting components.

The converter accepts any external differential reference
voltage from 0.1V to V

CC

 for flexible ratiometric and

remote sensing measurement configurations. The full-
scale differential input range is from – 0.5 •␣ V

REF

 to 0.5 •

V

REF

. The reference common mode voltage, V

REFCM

, and

the input common mode voltage, V

INCM

, may be indepen-

dently set anywhere between GND and V

CC

. The DC

common mode input rejection is better than 140dB.

The LTC2433-1 communicates through a flexible 3-wire
digital interface which is compatible with SPI and
MICROWIRE

TM

 protocols.

■

Direct Sensor Digitizer

■

Weight Scales

■

Direct Temperature Measurement

■

Gas Analyzers

■

Strain-Gage Transducers

■

Instrumentation

■

Data Acquisition

■

Industrial Process Control

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

■

■

µ

µ

■

■

■

µ

■

µ

■

■

Operates with a Reference as Low as 100mV with
16-Bit Resolution

■

Internal Oscillator—No External Components
Required

■

87dB Min, Simultaneous 50Hz and 60Hz Notch Filter

■

Single Supply 2.7V to 5.5V Operation

■

Pin Compatible with the 20/24-Bit LTC2431/LTC2411

■

Available in 10-Lead MSOP Package

Differential Input

16-Bit No Latency 

∆Σ

 ADC

No Latency 

∆Σ

 is a trademark of Linear Technology Corporation.

MICROWIRE is a trademark of National Semiconductor Corporation.

V

CC

REF

+

F

O

IN

+

IN

–

SCK

REF

–

SDO

GND

CS

1

10

4

9

3

5

6

8

7

24331 TA01

2

= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/SIMULTANEOUS 
   50Hz/60Hz REJECTION

3-WIRE
SPI INTERFACE

1

µ

F

(100mV)

4.9k

100

Ω

5V REF

LTC2433-1

V

REF

 (V)

0

*FOR V

REF

 

≥

 0.5V THE RESOLUTION 

  IS LIMITED BY STEP SIZE

0

MINIMUM RESOLVABLE SIGNAL (

µ

V)*

10

30

40

50

2

4

5

90

24331 TA02

20

1

3

60

70

80