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參數資料
| 型號： | OP490E |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 運動控制電子 |
| 英文描述： | Low Voltage Micropower Quad Operational Amplifier |
| 中文描述： | 低電壓，微功耗四運算放大器 |
| 文件頁數： | 11/16頁 |
| 文件大小： | 206K |
| 代理商： | OP490E |
REV. C
OP490
–11–
10
21
12
27
5
8
1/4
OP490E
A
+5V
R1
100k
11
4
2
V
REF
A
1
V
OUT
A
DAC A
1/4
DAC8408
1/4
OP490E
B
R2
100k
6
7
V
OUT
B
DAC B
1/4
DAC8408
V
REF
B
1/4
OP490E
C
R3
100k
13
14
V
OUT
C
DAC C
1/4
DAC8408
V
REF
C
1/4
OP490E
D
R4
100k
9
8
V
OUT
D
DAC D
1/4
DAC8408
V
REF
D
I
OUT2A/2B
I
OUT1A
I
OUT2C/2D
I
OUT1B
I
OUT1C
DAC DATA BUS
PIN9(LSB) – 16(MSB)
2
2
REFERENCE
VOLTAGE
1.5V
21
25
5
4
6
24
23
I
OUT1D
OP490EY
DAC8408ET
A/B
17
R/
W
18
DS1
19
20
DS2
DIGITAL
CONTROL
SIGNALS
28
DGND
Figure 6. Micropower Single-Supply Quad Voltage Output 8-Bit DAC
Micropower Single-Supply Quad Voltage-Output 8-Bit DAC
The circuit of Figure 6 uses the DAC8408 CMOS quad 8-bit
DAC, and the OP490 to form a single-supply quad voltage-output
DAC with a supply drain of only 140
m
A. The DAC8408 is used
in voltage switching mode and each DAC has an output resistance
(
a
10 k
W
) independent of the digital input code. The output
amplifiers act as buffers to avoid loading the DACs. The 100 k
W
resistors ensure that the OP490 outputs will swing below 0.8 V
when required.
相關PDF資料 |
PDF描述 |
|---|---|
| OP490F | Low Voltage Micropower Quad Operational Amplifier |
| op490 | Low Voltage Micropower Quad Operational Amplifier(低電壓微功率四運放) |
| op492 | Quad OP AMP(四運算放大器) |
| op292 | Dual OP AMP(雙運算放大器) |
| OP492 | DUAL/QUAD SINGLE SUPPLY OPERATIONAL AMPLIFIER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| OP490EY | 制造商:Rochester Electronics LLC 功能描述:MICROPOWER QUAD OP AMP IC - Bulk 制造商:Analog Devices 功能描述: |
| OP490F | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Voltage Micropower Quad Operational Amplifier |
| OP490FY | 制造商:Rochester Electronics LLC 功能描述:MICROPOWER QUAD OP AMP IC - Bulk 制造商:Analog Devices 功能描述: |
| OP490G | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Voltage Micropower Quad Operational Amplifier |
| OP490GBC | 制造商:Analog Devices 功能描述: |
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