參數(shù)資料
型號(hào)： LTC2420
廠商： Linear Technology Corporation
英文描述： Micropower 20-bit ADC(微功耗，20位串行模數(shù)轉(zhuǎn)換器)
中文描述： 微功耗20位ADC（微功耗，20位串行模數(shù)轉(zhuǎn)換器）
文件頁數(shù)： 1/36頁
文件大?。?/td> 388K
代理商： LTC2420
1
LTC2420
20-Bit
μ
Power
No Latency
Σ
TM
ADC in SO-8
I
Weight Scales
I
Direct Temperature Measurement
I
Gas Analyzers
I
Strain Gauge Transducers
I
Instrumentation
I
Data Acquisition
I
Industrial Process Control
I
4-Digit DVMs
No Latency
Σ
is a trademark of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
Total Unadjusted Error (3V Supply)
, LTC and LT are registered trademarks of Linear Technology Corporation.
I
20-Bit ADC in SO-8 Package
I
8ppm INL, No Missing Codes at 20 Bits
I
4ppm Full-Scale Error
I
0.5ppm Offset
I
1.2ppm Noise
I
Digital Filter Settles in a Single Cycle. Each
Conversion Is Accurate, Even After an Input Step
I
Fast Mode: 16-Bit Noise, 12 Bits TUE at 100sps
I
Internal Oscillator—No External Components
Required
I
110dB Min, 50Hz/60Hz Notch Filter
I
Reference Input Voltage: 0.1V to V
CC
I
Live Zero—Extended Input Range Accommodates
12.5% Overrange and Underrange
I
Single Supply 2.7V to 5.5V Operation
I
Low Supply Current (200
μ
A) and Auto Shutdown
I
Pin Compatible with 24-Bit LTC2400
APPLICATIU
The LTC
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
±
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
–12.5% 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.
FEATURES
DESCRIPTIOU
TYPICAL APPLICATIO
U
V
CC
F
O
V
REF
SCK
V
IN
SDO
1
2
3
4
8
7
6
5
GND
CS
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG
INPUT RANGE
–0.12V
REF
TO 1.12V
REF
= INTERNAL OSC/50Hz REJECTION
= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/60Hz REJECTION
3-WIRE
SPI INTERFACE
1
μ
F
2.7V TO 5.5V
LTC2420
2420 TA01
V
CC
INPUT VOLTAGE (V)
0
E
2
6
10
2.0
2420 G01
–2
–6
0
4
8
–4
–8
–10
0.5
1.0
1.5
2.5
V
CC
= 3V
V
REF
= 2.5V
T
A
= –55
°
C, –45
°
C, 25
°
C, 90
°
C
相關(guān)PDF資料
PDF描述
LTC2435IGN 20-Bit No Latency ADCs with Differential Input and Differential Reference
LTC2435-1IGN 20-Bit No Latency ADCs with Differential Input and Differential Reference
LTC2435 20-Bit No Latency ADCs with Differential Input and Differential Reference
LTC2435-1 20-Bit No Latency ADCs with Differential Input and Differential Reference
LTC2435-1CGN 20-Bit No Latency ADCs with Differential Input and Differential Reference
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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