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參數(shù)資料
| 型號： | OPA2338 |
| 英文描述： | MicroSIZE, Single-Supply CMOS OPERATIONAL AMPLIFIERS MicroAmplifier ⑩ Series |
| 中文描述： | MicroSIZE，單電源CMOS運算放大器MicroAmplifier⑩系列 |
| 文件頁數(shù)： | 8/9頁 |
| 文件大小： | 179K |
| 代理商： | OPA2338 |
8
OPA337, OPA2337
OPA338, OPA2338
Figure 4 shows a compensation technique using an inverting
configuration. The low frequency gain is set by the resistor
ratio while the high frequency gain is set by the capacitor
ratio. As with the noninverting circuit, for frequencies above
f
C
the gain must be greater than the recommended minimum
stable gain for the op amp.
The capacitor values shown are the nearest standard values.
Capacitor values may need to be adjusted slightly to opti-
mize performance. For more detailed information, consult
the OPA686 product data sheet.
Figure 5 shows the large-signal transient response using the
circuit given in Figure 4. As shown, the OPA338 is stable in
low gain applications and provides improved slew rate
performance when compared to the OPA337.
FIGURE 4. Inverting Compensation Circuit of OPA338 for
Low Gain.
5
OPA338
2
μ
s/div
FIGURE 5. G = 2, Slew-Rate Comparison of OPA338 and
OPA337.
OPA337
Resistors R
1
and R
2
are chosen to set the desired dc signal
gain. Then the value for C
2
is determined as follows:
C
2
= 1/(2
π
f
C
R
2
)
C
1
is determined from the desired high frequency gain (G
H
):
C
1
= (G
H
– 1) C
2
For a desired dc gain of 2 and high frequency gain of 10, the
following resistor and capacitor values result:
R
1
= 10k
R
2
= 5k
C
1
= 150pF
C
2
= 15pF
TYPICAL APPLICATION
Figure 6 shows the OPA2337 in a typical application. The
ADS7822 is a 12-bit, micro-power sampling analog-to-
digital converter available in the tiny MSOP-8 package. As
with the OPA2337, it operates with a supply voltage as
low as +2.7V. When used with the miniature SOT23-8
package of the OPA2337, the circuit is ideal for space-
limited and low power applications. In addition, OPA2337’s
high input impedance allows large value resistors to be
used which results in small physical capacitors, further
reducing circuit size. For further information, consult the
ADS7822 product data sheet.
C
2
= 2
1
= (G
H
–1) C
2
π
f
C
R
2
1
C
150pF
OPA338
V
IN
V
OUT
R
1
5k
R
2
10k
Where G
H
is the high frequency gain,
G
H
= 1 + C
1
/C
2
Improved slew rate versus OPA337
(see Figure 5).
C
15pF
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| OPA2338UA | RECTIFIER BRIDGE 25A 50V 300A-ifsm 1.1V-vf 5uA-ir GBPC 100/TRAY |
| OPA2338EA | MicroSIZE, Single-Supply CMOS OPERATIONAL AMPLIFIERS MicroAmplifier ⑩ Series |
| OPA2340 | SINGLE-SUPPLY, RAIL-TO-RAIL OPERATIONAL AMPLIFIERS MicroAmplifier ⑩ Series |
| OPA340 | SINGLE-SUPPLY, RAIL-TO-RAIL OPERATIONAL AMPLIFIERS MicroAmplifier ⑩ Series |
| OPA340NA | SINGLE-SUPPLY, RAIL-TO-RAIL OPERATIONAL AMPLIFIERS MicroAmplifier ⑩ Series |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA2338EA | 制造商:BB 制造商全稱:BB 功能描述:MicroSIZE, Single-Supply CMOS OPERATIONAL AMPLIFIERS MicroAmplifier ⑩ Series |
| OPA2338EA/250 | 功能描述:運算放大器 - 運放 MicroSIZE Single-Supply CMOS 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 |
| OPA2338EA/250G4 | 功能描述:運算放大器 - 運放 MicroSIZE Single-Supply CMOS 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 |
| OPA2338EA/3K | 功能描述:運算放大器 - 運放 MicroSIZE Single-Supply CMOS 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 |
| OPA2338EA/3KG4 | 功能描述:運算放大器 - 運放 MicroSIZE Single-Supply CMOS 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 |
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