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參數(shù)資料
| 型號： | OPA343OPA2343OPA4343 |
| 英文描述： | OPA343 OPA2343 OPA4343 - SINGLE-SUPPLY. RAIL-TO-RAIL OPERATIONAL AMPLIFIERS MicroAmplifier Series |
| 中文描述： | OPA343 OPA2343 OPA4343 -單電源。軌至軌運(yùn)算放大器MicroAmplifier系列 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大小： | 255K |
| 代理商： | OPA343OPA2343OPA4343 |
OPA343, 2343, 4343
8
APPLICATIONS INFORMATION
OPA343 series op amps are fabricated on a state-of-the-art
0.6 micron CMOS process. They are unity-gain stable and
suitable for a wide range of general purpose applications.
Rail-to-rail input/output make them ideal for driving sam-
pling A/D converters. In addition, excellent ac performance
makes them well-suited for audio applications. The class AB
output stage is capable of driving 600
loads connected to
any point between V+ and ground.
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
OPA343 in unity-gain configuration. Operation is from a
single +5V supply with a 10k
load connected to V
S
/2.
The input is a 5Vp-p sinusoid. Output voltage is approxi-
mately 4.98Vp-p.
Power supply pins should be bypassed with 0.01
μ
F ceramic
capacitors.
OPERATING VOLTAGE
OPA343 series op amps are fully specified from +2.7V to
+5V. However, supply voltage may range from +2.5V to
+5.5V. Parameters are guaranteed over the specified supply
range—a unique feature of the OPA343 series. In addition,
many specifications apply from –40
°
C to +85
°
C. Most
behavior remains virtually unchanged throughout the full
operating voltage range. Parameters which vary signifi-
cantly with operating voltages or temperature are shown in
the typical performance curves.
RAIL-TO-RAIL INPUT
The input common-mode voltage range of the OPA343
series extends 500mV 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
500mV above the positive supply. The P-channel pair is on
for inputs from 500mV below the negative supply to ap-
proximately (V+) –1.3V.
There is a small transition region, typically (V+) –1.5V to
(V+) –1.1V, in which both input 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.
FIGURE 2. Simplified Schematic.
V
S
= +5, G = +1, R
L
= 10k
V
IN
2
FIGURE 1. Rail-to-Rail Input and Output.
V
BIAS1
V
BIAS2
V
IN
+
V
IN
–
Class AB
Control
Circuitry
V
O
V–
(Ground)
V+
Reference
Current
5
5
0
V
OUT
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA343UA | 功能描述:運(yùn)算放大器 - 運(yùn)放 Single-Supply 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(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 |
| OPA343UA | 制造商:BURR-BROWN 功能描述:IC SM OP-AMP CMOS RRI/O |
| OPA343UA | 制造商:Texas Instruments 功能描述:Operational Amplifier IC Leaded Process |
| OPA343UA/2K5 | 功能描述:運(yùn)算放大器 - 運(yùn)放 Single-Supply 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(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 |
| OPA343UA/2K5G4 | 功能描述:運(yùn)算放大器 - 運(yùn)放 Single-Supply 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(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 |
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