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LMP2021

更新时间: 2024-11-23 11:11:59
品牌 Logo 应用领域
德州仪器 - TI 放大器
页数 文件大小 规格书
41页 1693K
描述
零漂移、低噪声、抗 EMI 单通道放大器

LMP2021 数据手册

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LMP2021, LMP2022  
SNOSAY9G SEPTEMBER 2008REVISED FEBRUARY 2016  
LMP202x Zero-Drift, Low-Noise, EMI-Hardened Amplifiers  
1 Features  
3 Description  
The LMP2021 and LMP2022 are single and dual  
precision operational amplifiers offering ultra low input  
offset voltage, near zero input offset voltage drift, very  
low input voltage noise and very high open loop gain.  
They are part of the LMP™ precision family and are  
ideal for instrumentation and sensor interfaces.  
1
(Typical Values, TA = 25°C, VS = 5 V)  
Input Offset Voltage (Typical) 0.4 µV  
Input Offset Voltage (Max) ±5 µV  
Input Offset Voltage Drift (Typical) –0.004 µV/°C  
Input Offset Voltage Drift (Max) ±0.02 µV/°C  
Input Voltage Noise, AV = 1000 11 nV/Hz  
Open Loop Gain 160 dB  
The LMP202x has only 0.004 µV/°C of input offset  
voltage drift, and 0.4 µV of input offset voltage. These  
attributes provide great precision in high accuracy  
applications.  
CMRR 139 dB  
PSRR 130 dB  
The proprietary continuous auto zero correction  
circuitry ensures impressive CMRR and PSRR,  
removes the 1/f noise component, and eliminates the  
need for calibration in many circuits.  
Supply Voltage Range 2.2 V to 5.5 V  
Supply Current (per Amplifier) 1.1 mA  
Input Bias Current ±25 pA  
With only 260 nVPP (0.1 Hz to 10 Hz) of input voltage  
noise and no 1/f noise component, the LMP202x are  
suitable for low frequency applications such as  
industrial precision weigh scales. The extremely high  
open loop gain of 160 dB drastically reduces gain  
error in high gain applications. With ultra precision  
DC specifications and very low noise, the LMP202x  
are ideal for position sensors, bridge sensors,  
pressure sensors, medical equipment and other high  
accuracy applications with very low error budgets.  
GBW 5 MHz  
Slew Rate 2.6 V/µs  
Operating Temperature Range 40°C to 125°C  
5-Pin SOT-23, 8-Pin VSSOP and 8-Pin SOIC  
Packages  
2 Applications  
Precision Instrumentation Amplifiers  
Battery Powered Instrumentation  
Thermocouple Amplifiers  
The LMP2021 is offered in 5-Pin SOT-23 and 8-Pin  
SOIC packages. The LMP2022 is offered in 8-Pin  
VSSOP and 8-Pin SOIC packages.  
Bridge Amplifiers  
Device Information(1)  
PART NUMBER  
PACKAGE  
BODY SIZE (NOM)  
4.90 mm x 3.91 mm  
2.90 mm x 1.60 mm  
4.90 mm x 3.91 mm  
3.00 mm x 3.00 mm  
SOIC (8)  
LMP2021  
SOT-23 (5)  
SOIC (8)  
LMP2022  
VSSOP (8)  
(1) For all available packages, see the orderable addendum at  
the end of the datasheet.  
Bridge Amplifier  
V
A
VA = 5V  
+
200W  
1 kW  
1/2  
LMP2022  
-
EMI  
V
A
5.1 kW  
0.1%  
V
A
0.1 mF  
470 pF  
R
1
R
4
180W  
-
+
LMP2021  
ADC161S626  
280W  
-
+
R
2
R
3
V
A
5.1 kW  
0.1%  
0.1 mF  
-
1/2  
V
R
= 1/2 V  
A
LMP2022  
+
1 kW  
200W  
The LMP202x support systems with up to 24 bits of accuracy.  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 

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