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MAX545

更新时间： 2024-11-10 22:55:19
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
12页 265K
描述
+5V, Serial-Input, Voltage-Output, 14-Bit DACs

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MAX545 数据手册

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19-1088; Rev 3; 12/99  
+5V, Serial-Input, Voltage-Output, 14-Bit DACs  
General Description  
Features  
The MAX544/MAX545 are serial-input, voltage-output,  
14-bit digital-to-analog converters (DACs) that operate  
from a single +5V supply. They provide 14-bit perfor-  
mance (±±.5ꢀLS ꢁIꢀ and ±±.0ꢀLS DIꢀ) over tempera-  
ture without any adjustments. The DAC output is  
unbuffered, resulting in a low supply current of ±.3mA  
and a low offset error of ±.6mV.  
ꢀ Full 14-Bit Performance Without Adjustments  
ꢀ +5V Single-Supply Operation  
ꢀ Low Power: 1.5mW  
ꢀ 1µs Settling Time  
ꢀ Unbuffered Voltage Output Directly Drives 60kΩ  
Loads  
The DAC output range is ±V to V  
For bipolar opera-  
REF.  
ꢀ SPI/QSPI/MICROWIRE-Compatible Serial Interface  
tion, matched scaling resistors are provided in the  
MAX545 for use with an external precision op amp  
(such as the MAX4±±), generating a ±V  
ꢀ Power-On Reset Circuit Clears DAC Output to 0V  
output  
REF  
(unipolar mode)  
swing. The MAX545 also includes Kelvin-sense con-  
nections for the reference and analog ground pins to  
reduce layout sensitivity.  
ꢀ Schmitt-Trigger Inputs for Direct Optocoupler  
Interface  
ꢀ Pin-Compatible 16-Bit Upgrades  
A 16-bit serial word is used to load data into the DAC  
latch. The 1±MHz, 3-wire serial interface is compatible  
with LPꢁ™/QLPꢁ™/MꢁCROWꢁRE™, and it also interfaces  
directly with optocouplers for applications requiring isola-  
tion. A power-on reset circuit clears the DAC output to ±V  
(unipolar mode) when power is initially applied.  
(MAX541/MAX542)  
Ordering Information  
INL  
PART  
TEMP. RANGE PIN-PACKAGE  
The MAX544 is available in 8-pin plastic DꢁP and LO  
packages. The MAX545 is available in 14-pin plastic  
DꢁP and LO packages.  
(LSB)  
±1/ꢂ  
±1  
MAX544ACPA  
MAX544SCPA  
MAX544ACLA  
MAX544SCLA  
±°C to +7±°C  
±°C to +7±°C  
±°C to +7±°C  
±°C to +7±°C  
8 Plastic DꢁP  
8 Plastic DꢁP  
8 LO  
±1/ꢂ  
±1  
Applications  
Digital Offset and Gain Adjustment  
ꢁnstrumentation  
8 LO  
Ordering Information continued at end of data sheet.  
ꢁndustrial Process Control  
Automated Test Equipment  
Data-Acquisition Lystems  
Functional Diagrams  
V
DD  
Pin Configurations  
RFB  
INV  
TOP VIEW  
MAX545  
R
FB  
R
INV  
REFF  
REFS  
V
14  
RFB  
OUT  
1
2
3
4
5
6
7
DD  
14-BIT DAC  
OUT  
13 INV  
AGNDF  
AGNDS  
MAX545  
AGNDF  
AGNDS  
REFS  
REFF  
12 DGND  
1
2
3
4
8
7
6
5
V
DD  
OUT  
AGND  
REF  
DATA LATCH  
CS  
LDAC  
SCLK  
DIN  
11  
10  
9
LDAC  
DIN  
DGND  
DIN  
CONTROL  
LOGIC  
MAX544  
SERIAL INPUT REGISTER  
N.C.  
CS  
SCLK  
CS  
8
SCLK  
DGND  
DIP/SO  
DIP/SO  
Functional Diagrams continued at end of data sheet.  
SPI and QSPI are trademarks of Motorola, Inc.  
MICROWIRE is a trademark of National Semiconductor Corp.  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.  
For small orders, phone 1-800-835-8769.  
1234567...12

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