參數(shù)資料
型號(hào): DAC8143FP
廠商: Analog Devices Inc
文件頁數(shù): 12/12頁
文件大?。?/td> 0K
描述: IC DAC 12BIT DAISY-CHAIN 16-DIP
產(chǎn)品培訓(xùn)模塊: Data Converter Fundamentals
DAC Architectures
產(chǎn)品變化通告: Product Discontinuance 27/Oct/2011
標(biāo)準(zhǔn)包裝: 25
設(shè)置時(shí)間: 380ns
位數(shù): 12
數(shù)據(jù)接口: 串行
轉(zhuǎn)換器數(shù)目: 1
電壓電源: 單電源
功率耗散(最大): 500µW
工作溫度: -40°C ~ 85°C
安裝類型: 通孔
封裝/外殼: 16-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 16-PDIP
包裝: 管件
輸出數(shù)目和類型: 2 電流,單極;2 電流,雙極
采樣率(每秒): 2.63M
DAC8143
–9–
REV. C
Table I. Truth Table
DAC8143 Logic Inputs
Input Register/
Digital Output
Control Inputs
DAC Register
Control Inputs
STB4
STB
3
STB2
STB1
CLR
LD
2
LD
1
DAC8143 Operation
Notes
01
0
g
XX
X
01
g
0
X
Serial Data Bit Loaded from SRI
0
f
0
X
into Input Register and Digital Output
2, 3
g
1
0
X
(SRO Pin) after 12 Clocked Bits.
1X
X
0
X
No Operation (Input Register and SRO)
3
XX
1
X
XX
X
1
Reset DAC Register to Zero Code
0
X
(Code: 0000 0000 0000)
1, 3
(Asynchronous Operation)
1
X
No Operation (DAC Register and SRO)
3
1X
1
0
Load DAC Register with the Contents
3
of Input Register
NOTES
1
CLR = 0 asynchronously resets DAC Register to 0000 0000 0000, but has no effect on Input Register.
2Serial data is loaded into Input Register MSB first, on edges shown. g is positive edge, f is negative edge.
30 = Logic LOW, 1 = Logic HIGH, X = Don’t Care.
APPLICATIONS INFORMATION
UNIPOLAR OPERATION (2-QUADRANT)
The circuit shown in Figures 16 and 17 may be used with an ac
or dc reference voltage. The circuit’s output will range between
0 V and +10(4095/4096) V depending upon the digital input
code. The relationship between the digital input and the analog
output is shown in Table II. The VREF voltage range is the maxi-
mum input voltage range of the op amp or
±25 V, whichever is
lowest.
Table II. Unipolar Code Table
Digital Input
Nominal Analog Output
(VOUT as Shown
MSB
LSB
in Figures 16 and 17)
1 1 1 1 1 1 1 1 1 1 1 1
–VREF
4095
4096
1 0 0 0 0 0 0 0 0 0 0 1
–VREF
2049
4096
1 0 0 0 0 0 0 0 0 0 0 0
–VREF
2048
4096
= –
VREF
2
0 1 1 1 1 1 1 1 1 1 1 1
–VREF
2047
4096
0 0 0 0 0 0 0 0 0 0 0 1
–VREF
1
4096
0 0 0 0 0 0 0 0 0 0 0 0
–VREF
0
4096
= 0
NOTES
1Nominal full scale for the circuits of Figures 16 and 17 is given by
FS = –VREF
4095
4096
.
2Nominal LSB magnitude for the circuits of Figures 16 and 17 is given by
LSB = VREF
1
4096
or VREF(2
–n).
OP-77
+5V
VREF
VDD
RFEEDBACK
IOUT1
IOUT2
AGND
DGND
SRO
(BUFFERED
DIGITAL
DATA OUT)
15pF
+15V
–15V
VOUT
7
6
4
3
2
15
14
13
4, 5
8–11
7
1
2
3
6
12
DAC8143
CONTROL
INPUTS
SRI
(SERIAL
DATA IN)
VREF
–10V
CLR
Figure 16. Unipolar Operation with High Accuracy Op
Amp (2-Quadrant)
OP-42
+5V
VREF
VDD
RFEEDBACK
IOUT1
IOUT2
AGND
DGND
SRO
(BUFFERED
DIGITAL
DATA OUT)
15pF
+15V
–15V
VOUT
7
6
4
3
2
15
14
13
4, 5
8–11
7
1
2
3
6
12
DAC8143
CONTROL
INPUTS
SRI
(SERIAL
DATA IN)
VREF
–10V
R2
50
R1
100
CLR
Figure 17. Unipolar Operation with Fast Op Amp and
Gain Error Trimming (2-Quadrant)
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