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參數(shù)資料
| 型號： | ISL28138 |
| 廠商： | Intersil Corporation |
| 英文描述： | 4.5MHz, Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Op Amps with Very Low Input Bias Current(具有極低輸入偏流的4.5MHz, 單/雙精度軌對軌輸入-輸出(RRIO)運(yùn)放) |
| 中文描述： | 4.5MHz，單和雙精密軌至軌輸入，輸出（RRIO）運(yùn)算放大器，極低的輸入偏置電流（具有極低輸入偏流的4.5MHz，單/雙精度軌對軌輸入-輸出（RRIO）運(yùn)放） |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 861K |
| 代理商： | ISL28138 |
11
FN6336.1
June 28, 2007
Applications Information
Introduction
The ISL28138 and ISL28238 are single and dual channel
CMOS rail-to-rail input, output (RRIO) micropower precision
operational amplifiers. The parts are designed to operate
from single supply (2.4V to 5.5V) or dual supply (±1.2V to
±2.75V). The parts have an input common mode range that
extends 0.25V above the positive rail and 100mV below the
the negative supply rail. The output operation can swing
within about 3mV of the supply rails with a 100k
Ω
load.
Rail-to-Rail Input
Many rail-to-rail input stages use two differential input pairs,
a long-tail PNP (or PFET) and an NPN (or NFET). Severe
penalties have to be paid for this circuit topology. As the
input signal moves from one supply rail to another, the
operational amplifier switches from one input pair to the
other causing drastic changes in input offset voltage and an
undesired change in magnitude and polarity of input offset
current.
The ISL28138 and ISL28238 achieve input rail-to-rail
operation without sacrificing important precision
specifications and degrading distortion performance. The
devices’ input offset voltage exhibits a smooth behavior
throughout the entire common-mode input range. The input
bias current versus the common-mode voltage range gives
us an undistorted behavior from typically 100mV below the
negative rail and 0.25V higher than the V+ rail.
Pin Descriptions
ISL28138
(6 Ld SOT-23)
ISL28138
(8 Ld SO)
ISL28238
(8 Ld SO)
(8 Ld MSOP)
PIN NAME
FUNCTION
EQUIVALENT CIRCUIT
1, 5
NC
Not connected
4
2
2
6
IN-
IN-_A
IN-_B
inverting input
Circuit 1
3
3
3
5
IN+
IN+_A
IN+_B
Non-inverting
input
(See circuit 1)
2
4
4
V-
Negative supply
Circuit 2
1
6
1
7
OUT
OUT_A
OUT_B
Output
Circuit 3
6
7
8
V+
Positive supply
(See circuit 2)
5
8
EN
Chip enable
Circuit 4
IN-
V+
V-
IN+
V+
V-
CAPACITIVELY
COUPLED
ESD CLAMP
V+
V-
OUT
V+
V-
EN
ISL28138, ISL28238
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL28238 | 4.5MHz, Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Op Amps with Very Low Input Bias Current(具有極低輸入偏流的4.5MHz, 單/雙精密軌對軌輸入-輸出(RRIO)運(yùn)放) |
| ISL28158 | 34μA Micro-power Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Low Input Bias Current Op Amps(34μA，微功率單/雙精度軌對軌輸入-輸出(RRIO)，低輸入偏流運(yùn)放) |
| ISL28258 | 34μA Micro-power Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Low Input Bias Current Op Amps(34μA，微功率單/雙精度軌對軌輸入-輸出(RRIO)，低輸入偏流運(yùn)放) |
| ISL28476 | Dual and Quad Micropower Single Supply Rail-to-Rail Input and Output (RRIO) Precision Op Amp(雙/四通道，微功率，單電源，軌對軌輸入/輸出(RRIO)精密運(yùn)放) |
| ISL28276 | Dual and Quad Micropower Single Supply Rail-to-Rail Input and Output (RRIO) Precision Op Amp(雙/四通道，微功率，單電源，軌對軌輸入/輸出(RRIO)精密運(yùn)放) |
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