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參數(shù)資料
| 型號(hào)： | LMC272 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | CMOS Dual Low Cost Rail to Rail Output Operational Amplifier |
| 中文描述： | CMOS雙低成本軌至軌輸出運(yùn)算放大器 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 458K |
| 代理商： | LMC272 |
Typical Performance Characteristics
(V
S
= +5V, single supply, T
A
= 25C, and R
L
to ground unless
otherwise specified) (Continued)
Application Information
It is generally difficult to find already existing solutions in the
market which are single supply and low noise. The circuit
above is a low noise single supply preamp using the
LMC272. It utilizes the feature of input common mode volt-
age range to ground to achieve zero-volt-in zero-volt-out
performance and uses the RR output swing to achieve maxi-
mum dynamic range. By introducing a differential pair oper-
ating at high bias current as the front end, the equivalent in-
put noise voltage, e
n
, is reduced. The gain is 1 + R5/R6
which is a 1000 in this case. There is an inherent trade off
between noise voltage and power consumption, input bias
current, and input noise current. Input equivalent noise cur-
rent is inconsequential if the source impedance is small. R1
can be adjusted to vary bias current. To avoid saturation, R3
and R4 should be set such that Q1 and Q3 collector voltages
do not exceed 0.5V. Table 1 shows typical noise data for two
different R1 settings:
Stability vs Capacitive Load
DS012867-36
Stability vs Capacitive Load
DS012867-37
Low Noise Single Supply Preamp
DS012867-2
www.national.com
12
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMC272CM | CMOS Dual Low Cost Rail to Rail Output Operational Amplifier |
| LMC272CMM | CMOS Dual Low Cost Rail to Rail Output Operational Amplifier |
| LMC272CMMX | CMOS Dual Low Cost Rail to Rail Output Operational Amplifier |
| LMC272CMX | CMOS Dual Low Cost Rail to Rail Output Operational Amplifier |
| LMC272CN | CMOS Dual Low Cost Rail to Rail Output Operational Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMC272BJE WAF | 制造商:Texas Instruments 功能描述: |
| LMC272CM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:CMOS Dual Low Cost Rail to Rail Output Operational Amplifier |
| LMC272CMM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:CMOS Dual Low Cost Rail to Rail Output Operational Amplifier |
| LMC272CMMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:CMOS Dual Low Cost Rail to Rail Output Operational Amplifier |
| LMC272CMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:CMOS Dual Low Cost Rail to Rail Output Operational Amplifier |
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