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LTC2420IS8 Datasheet

  • LTC2420IS8

  • 20-Bit uPower No Latency ADC in SO-8

  • 12頁

  • LINER

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Final Electrical Specifications
LTC2420
20-Bit
碌Power
No Latency
鈭單?/div>
TM
ADC in SO-8
January 2000
FEATURES
s
s
s
s
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
20-Bit ADC in SO-8 Package
8ppm INL, No Missing Codes at 20 Bits
4ppm Full-Scale Error
0.5ppm Offset
1.2ppm Noise
Digital Filter Settles in a Single Cycle. Each
Conversion Is Accurate, Even After an Input Step.
Internal Oscillator鈥擭o External Components
Required
Fast Mode: 16-Bit Noise, 12 Bits TUE at 100sps
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
Single Supply 2.7V to 5.5V Operation
Low Supply Current (200碌A(chǔ)) and Auto Shutdown
Pin Compatible with 24-Bit LTC2400
The LTC
廬
2420 is a micropower 20-bit A/D converter with
an integrated oscillator, 8ppm INL and 1.2ppm RMS
noise that operates from 2.7V to 5.5V. It uses delta-sigma
technology and provides a digital filter that settles in a
single cycle for multiplexed applications. Through a single
pin, the LTC2420 can be configured for better than 110dB
rejection at 50Hz or 60Hz
鹵2%,
or it can be driven by an
external oscillator for a user-defined rejection frequency
in the range 1Hz to 800Hz. The internal oscillator requires
no external frequency setting components.
The converter accepts any external reference voltage from
0.1V to V
CC
. With its extended input conversion range of
鈥?2.5% V
REF
to 112.5% V
REF
, the LTC2420 smoothly
resolves the offset and overrange problems of preceding
sensors or signal conditioning circuits.
The LTC2420 communicates through a flexible 3-wire
digital interface which 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
s
Weight Scales
Direct Temperature Measurement
Gas Analyzers
Strain-Gage Transducers
Instrumentation
Data Acquisition
Industrial Process Control
4-Digit DVMs
TYPICAL APPLICATIO
2.7V TO 5.5V
1碌F
1
V
CC
LTC2420
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG
INPUT RANGE
鈥?.12V
REF
TO 1.12V
REF
2
V
REF
SCK
7
F
O
8
Total Unadjusted Error vs Output Code
10
TOTAL UNADJUSTED ERROR (ppm)
8
6
4
2
0
鈥?
鈥?
鈥?
鈥?
鈥?0
0
V
CC
= INTERNAL OSC/50Hz REJECTION
= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/60Hz REJECTION
3
4
V
IN
GND
SDO
CS
6
5
3-WIRE
SPI INTERFACE
2420 TA01
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.
U
V
CC
= 5V
V
REF
= 5V
T
A
= 25擄C
F
O
= LOW
524,288
OUTPUT CODE (DECIMAL)
1,048,575
2420 TA02
U
U
1

LTC2420IS8 產(chǎn)品屬性

  • LTC2420

  • 100

  • 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

  • 8-SOIC（0.154"，3.90mm 寬）

  • 8-SOIC

  • 管件

  • 1 個(gè)單端，單極

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