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LTC2411

更新时间： 2024-09-09 22:55:51
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
36页 409K
描述
2-Channel Differential Input 24-Bit No Latency DS ADC

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中文翻译

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LTC2411 数据手册

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LTC2412  
2-Channel Differential Input  
24-Bit No Latency ∆Σ ADC  
U
DESCRIPTIO  
FEATURES  
TheLTC®2412isa2-channeldifferentialinputmicropower  
24-bit No Latency ∆ΣTM analog-to-digital converter with  
anintegratedoscillator.Itprovides2ppmINLand0.16ppm  
RMS noise over the entire supply range. The two differen-  
tial channels are converted alternately with channel ID  
included in the conversion results. It uses delta-sigma  
technology and provides single conversion settling of the  
digital filter. Through a single pin, the LTC2412 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 requires no external frequency  
setting components.  
■
2-Channel Differential Input with Automatic  
Channel Selection (Ping-Pong)  
■
Low Supply Current: 200µA, 4µA in Autosleep  
■
Differential Input and Differential Reference with  
GND to VCC Common Mode Range  
2ppm INL, No Missing Codes  
■
■
2.5ppm Full-Scale Error and 0.1ppm Offset  
■
0.16ppm Noise, 22.5 Effective Number of Bits  
■
No Latency: Digital Filter Settles in a Single Cycle and  
Each Channel Conversion is Accurate  
■
Internal Oscillator—No External Components  
Required  
■
110dB Min, 50Hz or 60Hz Notch Filter  
■
Narrow SSOP-16 Package  
The converter accepts any external differential reference  
voltage from 0.1V to VCC for flexible ratiometric and  
remote sensing measurement configurations. The full-  
■
Single Supply 2.7V to 5.5V Operation  
U
APPLICATIO S  
scale differential input range is from –0.5VREF to 0.5VREF  
.
The reference common mode voltage, VREFCM, and the  
input common mode voltage, VINCM, may be indepen-  
dently set anywhere within the GND to VCC. The DC  
common mode input rejection is better than 140dB.  
■
Direct Sensor Digitizer  
■
Weight Scales  
■
Direct Temperature Measurement  
Gas Analyzers  
Strain-Gage Transducers  
Instrumentation  
Data Acquisition  
Industrial Process Control  
6-Digit DVMs  
■
■
The LTC2412 communicates through a flexible 3-wire  
digital interface which is compatible with SPI and  
MICROWIRETM protocols.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
No Latency ∆Σ is a trademark of Linear Technology Corporation.  
MICROWIRE is a trademark of National Semiconductor Corporation.  
■
■
■
■
U
TYPICAL APPLICATIO  
Total Unadjusted Error vs Input  
1.5  
2.7V TO 5.5V  
V
CC  
1µF  
1.0  
= INTERNAL OSC/50Hz REJECTION  
1
2
4
14  
= EXTERNAL CLOCK SOURCE  
= INTERNAL OSC/60Hz REJECTION  
V
F
O
CC  
+
+
0.5  
0
REF  
CH0  
LTC2412  
5
3
13  
12  
11  
–
T
T
= 90°C  
= 25°C  
CH0  
SCK  
SDO  
CS  
A
A
V
= 5V  
CC  
–0.5  
–1.0  
–1.5  
+
THERMOCOUPLE  
REF = 5V  
3-WIRE  
SPI INTERFACE  
–
–
REF  
REF = GND  
T
= –45°C  
A
6
7
V
V
= 5V  
INCM  
= GND  
+
REF  
CH1  
CH1  
= 2.5V  
–
F
O
8, 9, 10, 15, 16  
–2.5 –2 –1.5 –1 –0.5  
V
0
0.5  
1
1.5  
2
2.5  
GND  
2412 TA01  
(V)  
2412 TA02  
IN  
2412f  
1
1234567...36

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