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參數(shù)資料
| 型號： | OPA2277UA |
| 英文描述： | Voltage-Feedback Operational Amplifier |
| 中文描述： | 電壓反饋運(yùn)算放大器 |
| 文件頁數(shù)： | 10/11頁 |
| 文件大小： | 159K |
| 代理商： | OPA2277UA |
10
OPA237, 2237, 4237
APPLICATIONS INFORMATION
OPA237 series op amps are unity-gain stable and suitable
for a wide range of general-purpose applications. Power
supply pins should be bypassed with 10nF ceramic capaci-
tors.
OPERATING VOLTAGE
OPA237 series op amps operate from single (+2.7V to
+36V) or dual (
±
1.35V to
±
18V) supplies with excellent
performance. Most behavior remains unchanged through-
out the full operating voltage range. Parameters which
vary significantly with operating voltage are shown in
typical performance curves. Specifications are production
tested with +2.7V, +5V, and
±
15V supplies.
OUTPUT CURRENT AND STABILITY
OPA237 series op amps can drive large capacitive loads.
However, under certain limited output conditions any op
amp may become unstable. Figure 1 shows the region
where the OPA237 has a potential for instability. These
load conditions are rarely encountered, especially for single
supply applications. For example, take the case when a
+5V supply with a 10k
load to V
S
/2 is used. OPA237
series op amps remain stable with capacitive loads up to
4,000pF, if sinking current and up to 10,000pF, if sourcing
current. Furthermore, in single supply applications where
the load is connected to ground, the op amp is only
sourcing current, and as shown in Figure 1, can drive
10,000pF with output currents up to 1.5mA.
FIGURE 1. Stability-Capacitive Load vs Output Current.
FIGURE 2. Low and High-Side Battery Current Sensing.
R
L
10
A1
OPA237
+
R
1
38.3k
R
3
38.3k
R
5
383k
R
6
10k
R
7
9.09k
R
4
20k
R
2
19.1k
A2
OPA237
R
8
100k
R
H
10
I
H
V+
V–
V+
V–
2.7V to ±15V
V+ for A
1
, A
2
–In
+In
–In
+In
V
O
= 10 I
H
R
H
To Load
To Load
V
O
= 10 I
L
R
L
Common-mode range of A2
extends to V– for low-side sensing.
Optional for I
B
Cancellation
(R
7
= R
6
II R
8
)
R
and R
divide down the
common-mode input to A1.
Low-Side
Current Sense
High-Side
Current Sense
Out
Out
NOTE: Low and high-side sensing circuits can be used independently.
V– for A
1
, A
2
I
L
2
0.5
1
1.5
Output Current (mA)
–2
–1.5
–1
–0.5
0
100k
10k
1k
100
10
C
V
S
= +2.7V
V
S
= +5V, ±15V
OPERATION NOT
RECOMMENDED
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| OPA237NA-250 | Voltage-Feedback Operational Amplifier |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA2277UA | 制造商:BURR-BROWN 功能描述:OP AMP DUAL PRECISION SMD 2277 制造商:Texas Instruments 功能描述:Operational Amplifier (Op-Amp) IC |
| OPA2277UA | 制造商:Texas Instruments 功能描述:OP AMP DUAL PRECISION SMD 2277 |
| OPA2277UA/2K5 | 功能描述:運(yùn)算放大器 - 運(yùn)放 High Precision Oper Amplifier RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA2277UA/2K5E4 | 功能描述:運(yùn)算放大器 - 運(yùn)放 High Precision Oper Amplifier RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA2277UA-2K5 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:High Precision OPERATIONAL AMPLIFIERS |
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