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LTC2412

更新时间： 2023-12-20 18:44:49
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亚德诺 - ADI /
页数 文件大小 规格书
38页 553K
描述
2 通道、差分输入、 24 位、无延迟增量累加 ΔΣ ADC

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中文翻译

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LTC2412 数据手册

 浏览型号LTC2412的Datasheet PDF文件第2页浏览型号LTC2412的Datasheet PDF文件第3页浏览型号LTC2412的Datasheet PDF文件第4页浏览型号LTC2412的Datasheet PDF文件第5页浏览型号LTC2412的Datasheet PDF文件第6页浏览型号LTC2412的Datasheet PDF文件第7页 
LTC2412  
2-Channel Differential Input  
24-Bit No Latency ∆Σ ADC  
FEATURES  
DESCRIPTION  
TheLTC®2412isa2-channeldifferentialinputmicropower  
24-bitNoLatency∆Σ™analog-to-digitalconverterwithan  
integrated oscillator. It provides 2ppm INL and 0.16ppm  
RMS noise over the entire supply range. The two differ-  
ential 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 2ꢀ, or it can be driven by an  
external oscillator for a user defined rejection frequency.  
The internal oscillator requires no external frequency set-  
ting components.  
n
2-Channel Differential Input with Automatic Chan-  
nel Selection (Ping-Pong)  
n
Low Supply Current: 200µA, 4µA in Autosleep  
n
Differential Input and Differential Reference with  
GND to V Common Mode Range  
CC  
n
n
n
n
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 Re-  
quired  
n
n
n
n
110dB Min, 50Hz or 60Hz Notch Filter  
Narrow SSOP-16 Package  
Single Supply 2.7V to 5.5V Operation  
The converter accepts any external differential reference  
voltage from 0.1V to V for flexible ratiometric and re-  
CC  
mote sensing measurementconfigurations. The full-scale  
APPLICATIONS  
differential input range is from –0.5V  
to 0.5V . The  
REFCM  
, may be independently set  
REF  
REF  
reference common mode voltage, V  
, and the input  
n
Direct Sensor Digitizer  
common mode voltage, V  
INCM  
n
Weight Scales  
anywhere within the GND to V . The DC common mode  
CC  
n
Direct Temperature Measurement  
Gas Analyzers  
Strain-Gage Transducers  
Instrumentation  
Data Acquisition  
Industrial Process Control  
6-Digit DVMs  
input rejection is better than 140dB.  
n
n
TheLTC2412communicatesthroughaflexible3-wiredigi-  
talinterfacewhichiscompatiblewithSPIandMICROWIRE  
protocols.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
No Latency ∆Σ is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners.  
n
n
n
n
TYPICAL APPLICATION  
Total Unadjusted Error vs Input  
2.7V TO 5.5V  
1.5  
V
CC  
1µF  
= INTERNAL OSC/50Hz REJECTION  
1
14  
= EXTERNAL CLOCK SOURCE  
= INTERNAL OSC/60Hz REJECTION  
1.0  
V
F
O
CC  
2
4
+
+
REF  
0.5  
0
CH0  
LTC2412  
5
3
13  
12  
11  
–
SCK  
SDO  
CS  
CH0  
THERMOCOUPLE  
T
T
= 90°C  
= 25°C  
A
A
3-WIRE  
SPI INTERFACE  
–
V
= 5V  
CC  
REF  
–0.5  
–1.0  
–1.5  
+
REF = 5V  
6
7
–
+
REF = GND  
CH1  
CH1  
T
= –45°C  
A
V
V
= 5V  
INCM  
= GND  
REF  
–
= 2.5V  
8, 9, 10, 15, 16  
F
O
GND  
2412 TA01  
–2.5 –2 –1.5 –1 –0.5  
V
0
0.5  
1
1.5  
2
2.5  
(V)  
2412 TA02  
IN  
2412fa  
1
For more information www.linear.com/LTC2412  
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