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LTC2640AITS8-LM12

更新时间： 2024-11-08 05:43:51
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
24页 340K
描述
Single 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference

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中文翻译

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LTC2640AITS8-LM12 数据手册

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LTC2640  
Single 12-/10-/8-Bit SPI  
V DACs with  
OUT  
10ppm/°C Reference  
FEATURES  
DESCRIPTION  
n
Integrated Precision Reference  
The LTC®2640 is a family of 12-, 10-, and 8-bit voltage-  
output DACs with an integrated, high-accuracy, low-drift  
referenceinan8-leadTSOT-23package.Ithasarail-to-rail  
output buffer that is guaranteed monotonic.  
2.5V Full-Scale 10ppm/°C (LTC2640-L)  
4.096V Full-Scale 10ppm/°C (LTC2640-H)  
n
Maximum INL Error: 1LSB (LTC2640A-12)  
n
Bidirectional Reference: Input or 10ppm/°C Output  
TheLTC2640-Lhasafull-scaleoutputof2.5V,andoperates  
from a single 2.7V to 5.5V supply. The LTC2640-H has a  
full-scale output of 4.096V, and operates from a 4.5V to  
5.5V supply. A 10ppm/°C reference output is available at  
the REF pin.  
n
Low Noise (0.7mVpp, 0.1Hz to 200kHz)  
n
Guaranteed Monotonic Over Temperature  
n
2.7V to 5.5V Supply Range (LTC2640-L)  
n
Low Power Operation: 180μA at 3V  
n
Power Down to 1.8μA Maximum (C and I Grades)  
n
n
n
n
n
Each DAC can also operate in External Reference mode,  
in which a voltage supplied to the REF pin sets the full-  
scale output.  
Asynchronous DAC Clear Pin (LTC2640-Z)  
Power-On Reset to Zero or Mid-Scale options  
Double-Buffered Data Latches  
Guaranteed Operation from –40°C to 125°C (H-Grade)  
8-Lead TSOT-23 (ThinSOT™) Package  
The LTC2640 DACs use a SPI/MICROWIRE™ compatible  
3-wire serial interface which operates at clock rates up  
to 50MHz.  
APPLICATIONS  
The LTC2640 incorporates a power-on reset circuit. Op-  
tions are available for Reset to Zero-Scale or Reset to  
Mid-Scale after power-up.  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property  
of their respective owners. Protected by U.S. Patents including 5396245, 5859606, 6891433,  
6937178 and 7414561.  
n
Mobile Communications  
n
Process Control and Industrial Automation  
n
Automatic Test Equipment  
n
Portable Equipment  
n
Automotive  
n
Optical Networking  
(LTC2640-Z)  
BLOCK DIAGRAM  
V
CC  
REF  
Integral Nonlinearity (LTC2640A-LZ12)  
1.0  
V
V
= 3V  
= 2.5V  
INTERNAL  
REFERENCE  
CC  
FS  
SWITCH  
SDI  
0.5  
0
CONTROL  
DECODE LOGIC  
RESISTOR  
DIVIDER  
24-BIT  
SHIFT  
REGISTER  
SCK  
DACREF  
DAC  
–0.5  
–1.0  
CS/LD  
V
OUT  
INPUT  
REGISTER  
DAC  
REGISTER  
2048  
3072  
0
4095  
1024  
CODE  
GND  
CLR  
2640 TA01b  
2640 TA01  
2640fb  
1
1234567...24

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