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參數(shù)資料
| 型號： | LMP8270 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運算放大器 |
| 英文描述： | High Common Mode, Gain of 20, Precision Voltage Difference Amplifiers |
| 中文描述： | OP-AMP, 1000 uV OFFSET-MAX, 0.08 MHz BAND WIDTH, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 3/5頁 |
| 文件大?。?/td> | 458K |
| 代理商： | LMP8270 |
5V Electrical Characteristics
(Note 7)
(Continued)
Unless otherwise specified, all limits guaranteed forT
A
= 25C, V
S
= 5V, GND = 0, -2V
≤
V
CM
≤
27V.
Boldface
limits apply at the
temperature extremes.
Symbol
Parameter
Conditions
Min
Typ
(Note
4)
TBD
TBD
Max
Units
Noise
0.1Hz ro 10Hz
Spectral Density
μVpp
nV/
√
Hz
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics Tables.
Note 2:
Human body model, 1.5 k
in series with 100 pF. Machine model: 0
in series with 200 pF.
Note 3:
The maximum power dissipation is a function of T
J(MAX)
,
θ
JA
, and T
A
. The maximum allowable power dissipation at any ambient temperature is
P
D
= (T
J(MAX)
- T
A
)/
θ
JA
. All numbers apply for packages soldered directly onto a PC board.
Note 4:
Typical values represent the most likely parametric norm.
Note 5:
Positive current corresponds to current flowing into the device.
Note 6:
Slew rate is the average of the rising and falling slew rates.
Note 7:
Electrical table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very limited self-heating of
the device.
Connection Diagram
8–Pin SOIC
20130703
Top View
Application Note
The LMP8270, LMP8275 are single supply amplifiers with a
fixed gain of 20 and an extended common mode voltage
range of -5V to 36V. The fixed gain is achieved in two
separate stages, a pre-amplifier with gain of +10 and a
second stage amplifier with gain of +2. A block diagram of
the LMP8270, LMP8275 is shown in Figure 1.
The overall offset of the LMP8270, LMP8275 is minimized by
trimming amplifier A1. This is done so that the output re-
ferred offset of A1 cancels the input referred offset of A2 or
10V
OS1
= -V
OS2
Because of this offset voltage relationship, the offset of each
individual amplifier stage maybe more than the limit speci-
fied for the overall system in the datasheet tables. Care must
be given when pin 3 and 4, A1 and A2, are connected to
each other. If the signal going from A1 to A2 is amplified or
attenuated (by use of amplifiers and resistors), the overall
LMP8270, LMP8275 offset will be affected as a result. Fil-
tering the signal betweenA1 andA2 or simply connecting the
two pins will not change the offset of the LMP8270,
LMP8275.
Referencing input referred offset voltages, the following re-
lationship holds:
If the signal on pin 3 is scaled, attenuated or amplified, by a
factor
X
, then the offset of the overall system will become:
20130701
FIGURE 1.
L
www.national.com
3
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| LMP8270MA/NOPB | 功能描述:IC AMP PREC DIFF 8-SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:LMP® 標準包裝:50 系列:LinCMOS™ 放大器類型:通用 電路數(shù):4 輸出類型:- 轉換速率:0.05 V/µs 增益帶寬積:110kHz -3db帶寬:- 電流 - 輸入偏壓:0.7pA 電壓 - 輸入偏移:210µV 電流 - 電源:57µA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):3 V ~ 16 V，±1.5 V ~ 8 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:14-SOIC 包裝:管件 產(chǎn)品目錄頁面:865 (CN2011-ZH PDF) 其它名稱:296-1834296-1834-5 |
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| LMP8270MAX/NOPB | 功能描述:IC AMP PREC VOLT DIFF 8-SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:LMP® 其它有關文件:Automotive Product Guide 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉換速率:3 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:1pA 電壓 - 輸入偏移:70µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設備封裝:SOT-6 包裝:Digi-Reel® 其它名稱:MAX4475AUT#TG16DKR |
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