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AD8303AN

更新时间： 2024-11-23 22:29:15
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亚德诺 - ADI /
页数 文件大小 规格书
16页 416K
描述
+3 V, Dual, Serial Input Complete 12-Bit DAC

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AD8303AN 数据手册

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+3 V, Dual, Serial Input  
Complete 12-Bit DAC  
a
AD8303  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
Complete Dual 12-Bit DAC  
V
DD  
Pretrimmed Internal Voltage Reference  
Single +3 V Operation  
0.5 mV/Bit with 2.0475 V Full Scale  
Low Power: 9.6 mW  
3-Wire Serial SPI Compatible Interface  
Power Shutdown IDD < 1 ␮A  
Compact SO-14, 1.75 mm Height Package  
R
E
OP  
V
DAC A  
R
AMP  
A
OUTA  
D
A
C
En  
G
I
S
T
E
R
CS  
CLK  
A
D
REF  
BUF  
B
E
F
R
E
G
I
S
T
E
R
SDI  
(DATA)  
P
R
A
N
D
G
A
P
S
H
I
F
T
E
R
E
N
C
E
V
REF  
APPLICATIONS  
R
E
G
I
S
T
E
R
REF  
BUF  
Portable Communications  
Digitally Controlled Calibration  
Servo Controls  
D
D
A
C
LDA  
LDB  
B
PC Peripherals  
OP  
AMP  
B
DAC B  
V
OUTB  
P
R
AD8303  
RS  
SHDN  
DGND  
MSB  
AGND  
GENERAL DESCRIPTION  
A double buffered serial data interface offers high speed, three-  
wire, DSP and SPI microcontroller compatible inputs using  
data in (SDI), clock (CLK) and load strobe (LDA + LDB)  
pins. A chip-select (CS) pin simplifies connection of multiple  
DAC packages by enabling the clock input when active low.  
Additionally, an RS input sets the output to zero scale or to 1/2  
scale based on the level applied to the MSB pin. A power  
shutdown feature reduces power dissipation to less than 3 µW.  
The AD8303 is a complete (includes internal reference) dual,  
12-bit, voltage output digital-to-analog converter designed to  
operate from a single +3 volt supply. Built using a CBCMOS  
process, this monolithic DAC offers the user low cost and ease-  
of-use in single-supply +3 volt systems. Operation is guaranteed  
over the supply voltage range of +2.7 V to +5.5 V making this  
device ideal for battery operated applications.  
The 2.0475 V full-scale voltage output is laser-trimmed to  
maintain accuracy over the operating temperature range of the  
device. The binary input data format provides an easy-to-use  
one-half millivolt-per-bit software programmability. The voltage  
outputs are capable of sourcing 3 mA.  
The AD8303 is specified over the extended industrial (–40°C to  
+85°C) temperature range. AD8303s are available in plastic  
DIP and low profile 1.75 mm height SO-14 surface mount  
packages. For single-channel DAC applications, see the  
AD8300 which is offered in the 8-lead DIP and SO-8 packages.  
1.0  
2
V
= +5V  
V
= +5V  
DD  
= –40°C, +25°C, +85°C  
DD  
0.8  
0.6  
T
A
1.5  
1
–40°C  
0.4  
+25°C  
0.5  
0
0.2  
0
–0.2  
–0.4  
–0.6  
–0.8  
–1.0  
–0.5  
–1  
+85°C  
–1.5  
–2  
0
1024  
2048  
3072  
4096  
0
1024  
2048  
3072  
4096  
DIGITAL INPUT CODE – Decimal  
DIGITAL INPUT CODE – Decimal  
Figure 2. Linearity Error vs. Digital Code and Temperature  
Figure 1. Differential Nonlinearity Error vs. Code  
REV. 0  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, nor for any infringements of patents or other rights of third parties  
which may result from its use. No license is granted by implication or  
otherwise under any patent or patent rights of Analog Devices.  
© Analog Devices, Inc., 1996  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 617/329-4700  
Fax: 617/326-8703  
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