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参数资料
| 型号： | OPA237UA |
| 元件分类： | 运算放大器 |
| 英文描述： | DIODE ZENER SINGLE 300mW 39Vz 2mA-Izt 0.0513 0.1uA-Ir 27.3 SOT-23 3K/REEL |
| 中文描述： | 单电源运算放大器MicroAmplifier⑩系列 |
| 文件页数： | 2/10页 |
| 文件大小： | 217K |
| 代理商： | OPA237UA |
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, A2
–In
+In
–In
+In
V
O = 10 IH RH
To Load
V
O = 10 IL RL
Common-mode range of A2
extends to V– for low-side sensing.
Optional for I
B Cancellation
(R
7 = R6 II R8)
R
2 and R4 divide down the
common-mode input to A1.
Low-Side
Current Sense
High-Side
Current Sense
Out
NOTE: Low and high-side sensing circuits can be used independently.
V– for A
1, A2
I
L
2
0.5
1
1.5
Output Current (mA)
–2
–1.5
–1
–0.5
0
100k
10k
1k
100
10
Capacitive
Load
(pF)
V
S = +2.7V
V
S = +5V, ±15V
OPERATION NOT
RECOMMENDED
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相关代理商/技术参数 |
参数描述 |
|---|---|
| OPA237UA | 制造商:Texas Instruments 功能描述:OPERATIONAL AMPLIFIER (OP-AMP) IC 制造商:Texas Instruments 功能描述:IC, OP-AMP, 1.5MHZ, 0.5V/ us, SOIC-8 |
| OPA237UA/2K5 | 功能描述:运算放大器 - 运放 Single-Supply RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| OPA237UA/2K5G4 | 功能描述:运算放大器 - 运放 Single-Supply RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| OPA237UA2K5 | 制造商:BB 制造商全称:BB 功能描述:SINGLE-SUPPLY OPERATIONAL AMPLIFIERS MicroAmplifier⑩ Series |
| OPA237UA2K5G4 | 制造商:BB 制造商全称:BB 功能描述:SINGLE-SUPPLY OPERATIONAL AMPLIFIERS MicroAmplifier⑩ Series |
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