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LTC2439-1 PDF预览

LTC2439-1

更新时间： 2024-11-14 14:58:19
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
30页 569K
描述
8 通道 / 16 通道、16 位、无延迟增量累加 ΔΣ ADC

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中文翻译

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LTC2439-1 数据手册

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LTC2439-1  
8-/16-Channel  
16-Bit No Latency ∆Σ™ ADC  
FEATURES  
DESCRIPTION  
TheLTC®2439-1isa16-channel(8-differential)micropower  
16-bit∆Σanalog-to-digitalconverter.Itoperatesfrom2.7V  
to 5.5V and includes an integrated oscillator, 0.12LSB  
INL and 1µV RMS noise. It uses delta-sigma technology  
and provides single cycle settling time for multiplexed  
applications. Through a single pin, the LTC2439-1 can be  
configuredforbetterthan87dBdifferentialmoderejection  
at 50Hz and 60Hz 2ꢀ, or it can be driven by an external  
oscillator for a user-defined rejection frequency. The  
internal oscillator requires no external frequency setting  
components.  
n
16-Channel Single-Ended or 8-Channel Differential  
Inputs  
n
Low Supply Current (200µA, 4µA in Autosleep)  
n
Rail-to-Rail Differential Input/Reference  
n
16-Bit No Missing Codes  
1µV RMS Noise, 16-ENOBS Independent of V  
Very Low Transition Noise: Less Than 0.02LSB  
Operates with a Reference as Low as 100mV with  
1.5µV LSB Step Size  
n
REF  
n
n
n
Guaranteed Modulator Stability and Lock-Up  
Immunity for Any Input and Reference Conditions  
Single Supply 2.7V to 5.5V Operation  
Internal Oscillator—No External Components  
Required  
87dB Min, 50Hz and 60Hz Simultaneous Notch Filter  
Pin Compatible with the 24-Bit LTC2418  
28-Lead SSOP Packag  
n
n
The LTC2439-1 accepts any external differential reference  
voltagefrom0.1VtoV forflexibleratiometricandremote  
CC  
sensing measurement applications. It can be configured  
n
n
n
to take 8 differential channels or 16 single-ended chan-  
nels. The full-scale bipolar input range is from –0.5V  
REF  
to0.5V . Thereferencecommonmodevoltage, V  
,
REF  
REFCM  
and the input common mode voltage, V  
, may be in-  
INCM  
APPLICATIONS  
dependently set between GND and V . The DC common  
CC  
n
Direct Sensor Digitizer  
mode input rejection is better than 140dB.  
n
Weight Scales  
The LTC2439-1 communicates through a flexible  
4-wire digital interface that is compatible with SPI and  
MICROWIRE 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
Direct Temperature Measurement  
Gas Analyzers  
Strain Gauge Transducers  
Instrumentation  
Data Acquisition  
Industrial Process Control  
n
n
n
n
n
TYPICAL APPLICATION  
Minimum Resolvable  
Signal vs VREF  
2.7V TO 5.5V  
11  
90  
1µF  
9
80  
70  
60  
50  
40  
30  
20  
10  
+
REF  
V
CC  
21 CH0  
22 CH1  
19  
F
= EXTERNAL OSCILLATOR  
= 50Hz and 60Hz REJECTION  
O
•
•
•
20  
28 CH7  
1
SDI  
SCK  
SDO  
CS  
16-CHANNEL  
MUX  
18  
17  
16  
CH8  
+
–
DIFFERENTIAL  
16-BIT ∆Σ ADC  
4-WIRE  
SPI INTERFACE  
THERMOCOUPLE  
•
•
•
8
CH15  
10 COM  
–
0
12 REF  
0
4
5
1
2
3
(V)  
15  
GND  
LTC2439-1  
V
24361 TA02  
REF  
*FOR V  
REF  
= 0.4V RESOLUTION IS LIMITED BY STEP SIZE  
241418 TA01a  
24391fb  
1
For more information www.linear.com/LTC2439-1  
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