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參數資料
| 型號： | OPA4342 |
| 英文描述： | Low Cost, Low Power, Rail-to-Rail OPERATIONAL AMPLIFIERS MicroAmplifier ⑩ Series |
| 中文描述： | 低成本，低功耗，軌至軌運算放大器MicroAmplifier⑩系列 |
| 文件頁數： | 8/10頁 |
| 文件大小： | 234K |
| 代理商： | OPA4342 |
8
OPA342, 2342, 4342
APPLICATIONS INFORMATION
OPA342 series op amps are unity gain stable and can operate
on a single supply, making them highly versatile and easy to
use.
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 OPA342 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
OPA342 series op amps are fully specified and guaranteed
from +2.7V to +5.5V. In addition, many specifications 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 OPA342
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 differen-
tial 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 re-
gion, typically (V+) – 1.5V to (V+) – 1.1V, in which both
pairs are on. This 400mV transition region can 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 degraded 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
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相關代理商/技術參數 |
參數描述 |
|---|---|
| OPA4342EA | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| OPA4342EA/250 | 功能描述:運算放大器 - 運放 Low Cost Lo-Power Rail-to-Rail RoHS:否 制造商:STMicroelectronics 通道數量: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 |
| OPA4342EA/250G4 | 功能描述:運算放大器 - 運放 Low Cost Lo-Power Rail-to-Rail RoHS:否 制造商:STMicroelectronics 通道數量: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 |
| OPA4342EA/2K5 | 功能描述:IC OPAMP GP R-R 1MHZ 14TSSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:MicroAmplifier™ 產品變化通告:Discontinuation 18/May/2012 標準包裝:2,000 系列:- 放大器類型:通用 電路數:4 輸出類型:滿擺幅 轉換速率:0.42 V/µs 增益帶寬積:1.5MHz -3db帶寬:- 電流 - 輸入偏壓:15nA 電壓 - 輸入偏移:1000µV 電流 - 電源:116µA 電流 - 輸出 / 通道:100mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5 V，±0.9 V ~ 2.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:14-TSSOP 包裝:帶卷 (TR) 產品目錄頁面:851 (CN2011-ZH PDF) 其它名稱:296-20930-2 |
| OPA4342EA250 | 制造商:BB 制造商全稱:BB 功能描述:Low-Cost, Low-Power, Rail-to-Rail OPERATIONAL AMPLIFIERS MicroAmplifier ⑩ Series |
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