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DAC8803

更新时间： 2024-09-14 21:55:03
品牌 Logo 应用领域
德州仪器 - TI 转换器
页数 文件大小 规格书
30页 254K
描述
Quad, Current Output, Serial Input 14-Bit Multiplying Digital-to-Analog Converter

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DAC8803 数据手册

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DAC8803  
www.ti.com  
SBAS340A–JANUARY 2005–REVISED APRIL 2005  
Quad, Current Output, Serial Input 14-Bit Multiplying Digital-to-Analog Converter  
FEATURES  
DESCRIPTION  
•
•
•
Relative Accuracy: 1 LSB Max  
The DAC8803 is a quad, 14-bit, current-output digi-  
tal-to-analog converter (DAC) designed to operate  
from a single 2.7 V to 5-V supply.  
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  
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.  
•
•
•
Four Separate 4-Quadrant Multiplying  
Reference Inputs  
A
doubled buffered serial data interface offers  
•
•
•
•
•
•
•
•
Reference Bandwidth: 10 MHz  
Reference Dynamics: -105 dB THD  
50-MHz SPI™-Compatible 3-Wire Interface  
Double Buffered Registers Enable  
Simultaneous Multichannel Update  
Internal Power On Reset  
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.  
Compact SSOP-28 Package  
Industry-Standard Pin Configuration  
APPLICATIONS  
•
•
•
Automatic Test Equipment  
Instrumentation  
The DAC8803 is packaged in a 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  
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
C
FB  
A1  
Input  
Register  
DAC C  
Register  
I
C
OUT  
SDI  
CS  
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.  
All trademarks are the property of their respective owners.  
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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