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參數資料
| 型號： | OP490F |
| 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： | 12/16頁 |
| 文件大小： | 206K |
| 代理商： | OP490F |
REV. C
OP490
–12–
High Output Amplifier
The amplifier shown in Figure 7 is capable of driving 25 V p-p
into a 1 k
W
load. Design of the amplifier is based on a bridge
configuration. A amplifies the input signal and drives the load
with the help of B. Amplifier C is a unity-gain inverter which
drives the load with help from D. Gain of the high output amplifier
with the component values shown is 10, but can easily be changed
by varying R1 or R2.
Single-Supply Micropower Quad Programmable Gain Amplifier
The combination of quad OP490 and the DAC8408 quad 8-bit
CMOS DAC, creates a quad programmable-gain amplifier with
a quiescent supply drain of only 140
m
A. The digital code present
at the DAC, which is easily set by a microprocessor, determines
the ratio between the fixed DAC feedback resistor and the resis-
tance of the DAC ladder presents to the op amp feedback loop.
Gain of each amplifier is:
V
V
n
OUT
IN
= -
256
+15V
–15V
1/4
OP490E
B
1
R1
1k
V
IN
2
3
11
4
R2
9k
1/4
OP490E
B
7
6
5
R3
50
R4
50
R
L
R8
50
8
1/4
OP490E
C
13
12
9
10
1/4
OP490E
D
R6
5k
R7
50
R5
5k
14
Figure 7. High Output Amplifier
where
n
equals the decimal equivalent of the 8-bit digital code
present at the DAC. If the digital code present at the DAC
consists of all zeros, the feedback loop will be open causing the
op amp output to saturate. The 10 M
W
resistors placed in paral-
lel with the DAC feedback loop eliminates this problem with a
very small reduction in gain accuracy. The 2.5 V reference biases
the amplifiers to the center of the linear region providing maximum
output swing.
相關PDF資料 |
PDF描述 |
|---|---|
| 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 |
| OP492GBC | DUAL/QUAD SINGLE SUPPLY OPERATIONAL AMPLIFIER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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: |
| OP490GP | 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:OP AMP QUAD MICROPOWER DIP14 490 |
| OP490GPZ | 功能描述:IC OPAMP GP 20KHZ QUAD 14DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:2,500 系列:- 放大器類型:通用 電路數:4 輸出類型:- 轉換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
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