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DAC8814

更新时间： 2024-09-12 21:55:31
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德州仪器 - TI 转换器
页数 文件大小 规格书
31页 257K
描述
Quad, Serial Input 16-Bit Multiplying Digital-to-Analog Converter

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DAC8814  
www.ti.com  
SBAS338–JANUARY 2005  
Quad, Serial Input 16-Bit Multiplying Digital-to-Analog Converter  
FEATURES  
DESCRIPTION  
•
•
•
Relative Accuracy: 1 LSB Max  
Differential Nonlinearity: 1 LSB Max  
2-mA Full-Scale Current ±20%,  
with VREF = ±10 V  
0.5 µs Settling Time  
Midscale or Zero-Scale Reset  
Four Separate 4Q Multiplying Reference  
Inputs  
The DAC8814 is a quad, 16-bit, current-output digi-  
tal-to-analog converter (DAC) designed to operate  
from a single +2.7 V to 5.0 V supply.  
The applied external reference input voltage VREF  
determines the full-scale output current. An internal  
feedback resistor (RFB) provides temperature tracking  
for the full-scale output when combined with an  
external I-to-V precision amplifier.  
•
•
•
A
doubled buffered serial data interface offers  
•
•
•
Reference Bandwidth: 10 MHz  
high-speed, 3-wire, SPI and microcontroller compat-  
ible inputs using serial data in (SDI), clock (CLK), and  
a chip-select (CS). In addition, a serial data out pin  
(SDO) allows for daisy-chaining when multiple pack-  
ages are used. A common level-sensitive load DAC  
strobe (LDAC) input allows simultaneous update of all  
DAC outputs from previously loaded input registers.  
Additionally, an internal power on reset forces the  
output voltage to zero at system turn on. An MSB pin  
allows system reset assertion (RS) to force all regis-  
ters to zero code when MSB = 0, or to half-scale  
code when MSB = 1.  
Reference Dynamics: -105 dB THD  
SPI™-Compatible 3-Wire Interface:  
50 MHz  
Double Buffered Registers Enable  
Simultaneous Multichannel Change  
Internal Power On Reset  
•
•
•
•
Industry-standard Pin Configuration  
APPLICATIONS  
•
•
•
Automatic Test Equipment  
Instrumentation  
The DAC8814 is available in an SSOP package.  
Digitally Controlled Calibration  
A
B C D  
V
REF  
D0  
D1  
R A  
FB  
SDO  
D2  
D3  
D4  
D5  
D6  
D7  
D8  
D9  
D10  
D11  
D12  
D13  
D14  
D15  
A0  
Input  
Register  
DAC A  
Register  
DAC A  
DAC B  
DAC C  
DAC D  
I
A
OUT  
R
R
R
R
R
R
A
A
GND  
R
B
FB  
Input  
Register  
DAC B  
Register  
16  
I
C
OUT  
A
B
GND  
R
I
C
FB  
Input  
Register  
DAC C  
Register  
C
OUT  
SDI  
CS  
A1  
A
C
GND  
R
D
FB  
CLK  
EN  
Input  
Register  
DAC D  
Register  
I
D
OUT  
R
R
A
DAC  
B
C
D
A
D
GND  
2:4  
Power-on  
Reset  
A
F
GND  
Decode  
DGND  
RS  
MSB  
LDAC  
V
SS  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
SPI is a trademark of Motorola, Inc.  
PRODUCT PREVIEW information concerns products in the forma-  
tive or design phase of development. Characteristic data and other  
specifications are design goals. Texas Instruments reserves the  
right to change or discontinue these products without notice.  
Copyright © 2005, Texas Instruments Incorporated  
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DAC8814 替代型号

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