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參數(shù)資料
| 型號(hào)： | OPA241 |
| 英文描述： | Single-Supply， microPower Operational Amplifiers |
| 中文描述： | 單電源，微功耗運(yùn)算放大器 |
| 文件頁數(shù)： | 9/11頁 |
| 文件大小： | 243K |
| 代理商： | OPA241 |
9
OPA241, 251
APPLICATIONS INFORMATION
The OPA241 and OPA251 are unity-gain stable and suitable
for a wide range of general purpose applications. Power supply
pins should be bypassed with 0.01
μ
F ceramic capacitors.
OPERATING VOLTAGE
OPA241 is laser-trimmed for low offset voltage and drift at
low supply voltage (V
S
= +5V). OPA251 is trimmed for
±
15V operation. Both products operate over the full voltage
range (+2.7V to +36V or
±
1.35V to
±
18V) with some
compromises in offset voltage and drift performance. How-
ever, all other parameters have the same performance. Key
parameters are guaranteed over the specified temperature
range, –40
°
C to +85
°
C. Most behavior remains unchanged
throughout the full operating voltage range. Parameters
which vary significantly with operating voltage or tempera-
ture are shown in typical performance curves.
INPUT VOLTAGE
The input common-mode range of the OPA241 and OPA251
extends from 200mV below the negative rail to 1V from the
positive rail. For normal operation, inputs should be limited
to this range. Input terminals are diode-clamped to the power
supply rails for ESD protection. If the input voltage can
exceed the supplies by 500mV, the input current should be
limited to 5mA (or less). This is easily accomplished with an
input resistor as shown in Figure 1. Many input signals are
inherently current-limited, therefore, a limiting resistor may
not be required.
R
IN
OPA241
5mA max
V+
V–
V
IN
V
OUT
I
OVERLOAD
FIGURE 1. Input Current Protection for Voltage Exceeding
the Supply Voltage.
voltage as shown in Figure 2. For example, an application
with a total power supply voltage of +5V should limit input
signal current to less than 2.5mA. Again, this precaution is
only required if the input voltage can swing more than
0.5V below the V– supply rail. Figure 3 shows the output
waveform when the input (V
IN
=
±
20V) is greater than the
supplies (V
S
=
±
15V) for the configuration shown in
Figure 1 with R
IN
= 1k
.
In non-inverting circuits, some op amps produce a phase
reversal of the output when the input signal exceeds the
amplifier’s linear common-mode range. Under most condi-
tions, the OPA241 will not produce phase reversal. If,
however, the input signal can swing more than 0.5V below
ground (or V–) and the signal source can supply sufficient
current, output inversion could occur. The signal input
current that can cause inversion varies with the supply
FIGURE 2. Output Phase Reversal is a Function of Input
Current and Supply Voltage.
Total Supply Voltage, V
S
(V)
I
12
10
8
6
4
2
0
0
5
10
15
20
25
30
35
40
Operation above dashed
line is not recommended.
Damage can occur if input
current exceeds 5mA.
V
IN
= (V–) –0.5V
FIGURE 3. No Phase Inversion with Inputs Greater than the
Power Supply Voltage.
5
2ms/div
V
S
=
±
15V, V
IN
=
±
20V, R
IN
= 1k
V
OUT
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| OPA241PA | Voltage-Feedback Operational Amplifier |
| OPA244 | 256K, 32K X 8, 1.8V SER EE, -40C to +85C, 8-MSOP, TUBE |
| OPA244NA | 256K, 32K X 8, 1.8V SER EE IND, -40C to +85C, 8-SOIC 150mil, TUBE |
| OPA244PA | 256K, 32K X 8, 1.8V SER EE, -40C to +85C, 8-DFN, T/R |
| OPA251PA | 256K, 32K X 8 1.8V SER EE, -40C to +85C, 8-SOIC 150mil, T/R |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA241PA | 功能描述:運(yùn)算放大器 - 運(yùn)放 Single-Supply MicroPower Oper Amp 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 |
| OPA241PA | 制造商:BURR-BROWN 功能描述:IC OP-AMP MICROPOWER |
| OPA241PAG4 | 功能描述:運(yùn)算放大器 - 運(yùn)放 Single-Supply MicroPower Oper Amp 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 |
| OPA241UA | 功能描述:運(yùn)算放大器 - 運(yùn)放 Single-Supply MicroPower Oper Amp 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 |
| OPA241UA | 制造商:BURR-BROWN 功能描述:IC SM OP-AMP MICROPOWER 制造商:Texas Instruments 功能描述:IC OP AMP 制造商:Texas Instruments 功能描述:IC, OP AMP |
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