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LTC2422IMS Datasheet

  • LTC2422IMS

  • A/D CONVERTER

  • 32頁(yè)

  • ETC

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LTC2421/LTC2422
1-/2-Channel 20-Bit
碌Power
No Latency
鈭單?/div>
TM
ADCs in MSOP-10
FEATURES
s
s
s
s
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
s
20-Bit ADCs in Tiny MSOP-10 Packages
1- or 2-Channel Inputs
Single Supply 2.7V to 5.5V Operation
Low Supply Current (200碌A(chǔ)) and Auto Shutdown
Automatic Channel Selection (Ping-Pong) (LTC2422)
No Latency: Digital Filter Settles in a
Single Conversion Cycle
8ppm INL, No Missing Codes
4ppm Full-Scale Error
0.5ppm Offset
1.2ppm Noise
Zero Scale and Full Scale Set for Reference
and Ground Sensing
Internal Oscillator鈥擭o External Components Required
110dB Min, 50Hz/60Hz Notch Filter
Reference Input Voltage: 0.1V to V
CC
Live Zero鈥擡xtended Input Range Accommodates
12.5% Overrange and Underrange
Pin Compatible with LTC2401/LTC2402
The LTC
廬
2421/LTC2422 are 1- and 2-channel 2.7V to 5.5V
micropower 20-bit analog-to-digital converters with an
integrated oscillator, 8ppm INL and 1.2ppm RMS noise.
These ultrasmall devices use delta-sigma technology and
a new digital filter architecture that settles in a single cycle.
This eliminates the latency found in conventional
鈭單?/div>
converters and simplifies multiplexed applications.
Through a single pin, the LTC2421/LTC2422 can be
configured for better than 110dB rejection at 50Hz or
60Hz
鹵2%,
or can be driven by an external oscillator for
a user defined rejection frequency in the range 1Hz to
120Hz. The internal oscillator requires no external fre-
quency setting components.
These converters accept an external reference voltage
from 0.1V to V
CC
. With an extended input conversion
range of 鈥?2.5% V
REF
to 112.5% V
REF
(V
REF
= FS
SET
鈥?/div>
ZS
SET
), the LTC2421/LTC2422 smoothly resolve the off-
set and overrange problems of preceding sensors or
signal conditioning circuits.
The LTC2421/LTC2422 communicate through a 2- or
3-wire digital interface that is compatible with SPI and
MICROWIRE
TM
protocols.
, LTC and LT are registered trademarks of Linear Technology Corporation.
No Latency
鈭單?/div>
is a trademark of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
APPLICATIO S
s
s
s
s
s
s
s
Weight Scales
Direct Temperature Measurement
Gas Analyzers
Strain Gauge Transducers
Instrumentation
Data Acquisition
Industrial Process Control
TYPICAL APPLICATIO
2.7V TO 5.5V
1碌F
1
V
CC
LTC2422
REFERENCE VOLTAGE
ZS
SET
+ 0.1V TO V
CC
ANALOG INPUT RANGE
ZS
SET
鈥?0.12V
REF
TO
FS
SET
+ 0.12V
REF
(V
REF
= FS
SET
鈥?ZS
SET
)
0V TO FS
SET
鈥?100mV
2
3
4
5
FS
SET
CH1
CH0
ZS
SET
SCK
SDO
CS
GND
F
O
Pseudo Differential Bridge Digitizer
2.7V TO 5.5V
V
CC
10
= INTERNAL OSC/50Hz REJECTION
= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/60Hz REJECTION
9
8
7
3-WIRE
SPI INTERFACE
6
24212 TA01
U
1
2
4
3
5
V
CC
LTC2422
FS
SET
9
SCK
CH0
CH1
ZS
SET
GND
6
SDO
CS
F
O
8
7
10
INTERNAL OSCILLATOR
60Hz REJECTION
3-WIRE
SPI INTERFACE
24012TA02
U
U
24212f
1

LTC2422IMS 產(chǎn)品屬性

  • LTC2421/22

  • 50

  • 集成電路 (IC)

  • 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器

  • -

  • 20

  • 7.5

  • MICROWIRE?，串行，SPI?

  • 2

  • 1mW

  • 單電源

  • -40°C ~ 85°C

  • 表面貼裝

  • 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）

  • 10-MSOP

  • 管件

  • 2 個(gè)單端，單極；2 個(gè)偽差分，單極

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