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參數(shù)資料
| 型號(hào)： | OPA2345EA |
| 英文描述： | LOW POWER, SINGLE-SUPPLY, RAIL-TO-RAIL OPERATIONAL AMPLIFIERS MicroAmplifier ⑩ Series |
| 中文描述： | 低功耗，單電源，軌到軌運(yùn)算放大器MicroAmplifier⑩系列 |
| 文件頁數(shù)： | 9/11頁 |
| 文件大?。?/td> | 243K |
| 代理商： | OPA2345EA |
9
OPA344, 2344, 4344
OPA345, 2345, 4345
APPLICATIONS INFORMATION
OPA344 series op amps are unity gain stable and can operate
on a single supply, making them highly versatile and easy to
use. OPA345 series op amps are optimized for applications
requiring higher speeds with gains of 5 or greater.
Rail-to-rail input and output swing significantly increases
dynamic range, especially in low supply applications. Figure
1 shows the input and output waveforms for the OPA344 in
unity-gain configuration. Operation is from V
S
= +5V with
a 10k
load connected to V
S
/2. The input is a 5Vp-p
sinusoid. Output voltage is approximately 4.997Vp-p.
Power supply pins should be by passed with 0.01pF ceramic
capacitors.
OPERATING VOLTAGE
OPA344 and OPA345 series op amps are fully specified and
guaranteed from +2.7V to +5.5V. In addition, many specifi-
cations apply from –40oC to +85oC. Parameters that vary
significantly with operating voltages or temperature are
shown in the Typical Performance Curves.
RAIL-TO-RAIL INPUT
The input common-mode voltage range of the OPA344 and
OPA345 series extends 300mV beyond the supply rails.
This is achieved with a complementary input stage—an N-
channel input differential pair in parallel with a P-channel
differential pair (see Figure 2). The N-channel pair is active
for input voltages close to the positive rail, typically (V+) –
1.3V to 300mV above the positive supply, while the P-
channel pair is on for inputs from 300mV below the negative
supply to approximately (V+) –1.3V. There is a small
transition region, typically (V+) – 1.5V to (V+) – 1.1V, in
vary 300mV with process variation. Thus, the transition
region (both stages on) can range from (V+) – 1.8V to (V+)
– 1.4V on the low end, up to (V+) – 1.2V to (V+) – 0.8V on
the high end. Within the 400mV transition region PSRR,
CMRR, offset voltage, offset drift, and THD may be de-
graded compared to operation outside this region. For more
information on designing with rail-to-rail input op amps, see
Figure 3 “Design Optimization with Rail-to-Rail Input Op
Amps.”
FIGURE 2. Simplified Schematic.
V
BIAS1
V
BIAS2
V
IN
+
V
IN
–
Class AB
Control
Circuitry
V
O
V–
(Ground)
V+
Reference
Current
FIGURE 1. Rail-to-Rail Input and Output.
5
μ
s/div
1
Output (inverted on scope)
Input
G = +1, V
S
= +5V
5V
0V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| OPA4345EA | LOW POWER, SINGLE-SUPPLY, RAIL-TO-RAIL OPERATIONAL AMPLIFIERS MicroAmplifier ⑩ Series |
| OPA4345UA | LOW POWER, SINGLE-SUPPLY, RAIL-TO-RAIL OPERATIONAL AMPLIFIERS MicroAmplifier ⑩ Series |
| OPA344 | LOW POWER, SINGLE-SUPPLY, RAIL-TO-RAIL OPERATIONAL AMPLIFIERS MicroAmplifier ⑩ Series |
| OPA344NA | LOW POWER, SINGLE-SUPPLY, RAIL-TO-RAIL OPERATIONAL AMPLIFIERS MicroAmplifier ⑩ Series |
| OPA2344 | LOW POWER, 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 |
|---|---|
| OPA2345EA/250 | 功能描述:運(yùn)算放大器 - 運(yùn)放 Lo Pwr Single-Sply 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 |
| OPA2345EA/250G4 | 功能描述:運(yùn)算放大器 - 運(yùn)放 Lo Pwr Single-Sply 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 |
| OPA2345EA/2K5 | 功能描述:運(yùn)算放大器 - 運(yùn)放 Lo Pwr Single-Sply 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 |
| OPA2345EA/2K5G4 | 功能描述:運(yùn)算放大器 - 運(yùn)放 Lo Pwr Single-Sply 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 |
| OPA2345EA250 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW POWER, SINGLE-SUPPLY,RAIL-TO-RAIL OPERATIONAL AMPLIFIERS |
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