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參數(shù)資料
| 型號： | OPA2365 |
| 英文描述： | 2.2V, 50MHz, Low-Noise, Single-Supply Rail-to-Rail OPERATIONAL AMPLIFIERS |
| 中文描述： | 2.2伏，50MHz的，低噪聲，單電源軌至軌運算放大器 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 301K |
| 代理商： | OPA2365 |
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SBOS365A JUNE 2006 REVISED JULY 2006
www.ti.com
8
Figure 2 shows a single-supply, electret microphone
application where V
CM
is provided by a resistive divider.
The divider also provides the bias voltage for the elec-
tret element.
INPUT AND ESD PROTECTION
The OPA365 incorporates internal electrostatic dis-
charge (ESD) protection circuits on all pins. In the case
of input and output pins, this protection primarily con-
sists of current steering diodes connected between the
input and power-supply pins. These ESD protection
diodes also provide in-circuit, input overdrive protec-
tion, provided that the current is limited to 10mA as
stated in the Absolute Maximum Ratings. Figure 3
shows how a series input resistor may be added to the
driven input to limit the input current. The added resistor
contributes thermal noise at the amplifier input and its
value should be kept to the minimum in noise-sensitive
applications.
RAILTORAIL INPUT
The OPA365 product family features true rail-to-rail in-
put operation, with supply voltages as low as
±
1.1V
(2.2V). A unique zer
-crossover input topology elimi-
nates the input offset transition region typical of many
rail-to-rail, complementary stage operational amplifiers.
This topology also allows the OPA365 to provide superi-
or commonmode performance over the entire input
range, which extends 100mV beyond both power-sup-
ply rails; see Figure 4. When driving ADCs, the highly
linear VCM range of the OPA365 assures that the op
amp/ADC system linearity performance is not compro-
mised.
3.3V
49k
V
OUT
OPA365
Clean 3.3V Supply
1
μ
F
4k
6k
Electret
Microphone
5k
Figure 2. Microphone Preamplifier
5k
OPA365
10mA max
V+
V
IN
V
OUT
I
OVERLOAD
Figure 3. Input Current Protection
OFFSET VOLTAGE vs COMMONMODE VOLTAGE
V
O
(
μ
V
200
150
100
50
0
50
150
100
200
2
3
CommonMode Voltage (V)
3
1
0
1
2
V
S
=
±
2.75V
OPA365
Competitors
Figure 4. OPA365 has Linear Offset Over the
Entire Common-Mode Range
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| OPA2369AIDCNTG4 | 1.8V, 1レA max, Zer┆-Crossover RAIL-TO-RAIL I/O OPERATIONAL AMPLIFIER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| OPA2365AID | 功能描述:運算放大器 - 運放 50MHz Single Supply Rail-to-Rail OP 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 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA2365AIDG4 | 功能描述:運算放大器 - 運放 50MHz Single Supply Rail-to-Rail OP 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 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA2365AIDR | 功能描述:運算放大器 - 運放 2.2V 50MHz Lo-Noise Sgl-Spy Rail-to-Rail 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 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA2365AIDRG4 | 功能描述:運算放大器 - 運放 2.2V 50MHz Lo-Noise Sgl-Spy Rail-to-Rail 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 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA2365AQDRQ1 | 功能描述:運算放大器 - 運放 2.2V,50MHz,Lo-Noise Sgl-Sply RR Op 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 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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