lmp2234bmtx National Semiconductor Corporation, lmp2234bmtx Datasheet

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lmp2234bmtx

Manufacturer Part Number
lmp2234bmtx
Description
Micropower, Precision, Rro Amplifier With Cmos Input
Manufacturer
National Semiconductor Corporation
Datasheet
© 2007 National Semiconductor Corporation
LMP2234 Quad
Micropower, Precision, RRO Amplifier with CMOS Input
General Description
The LMP2234 is a quad micropower precision amplifier de-
signed for battery powered applications. The 1.8 to 5.5V
operating voltage range and quiescent power consumption of
only 62 μW extend the battery life in portable systems. The
LMP2234 is part of the LMP
high impedance CMOS input makes it ideal for instrumenta-
tion and other sensor interface applications.
The LMP2234 has a maximum offset voltage of 150 μV and
0.3 μV/°C offset drift along with low bias current of only
±20 fA. These precise specifications make the LMP2234 a
great choice for maintaining system accuracy and long term
stability.
The LMP2234 has a rail-to-rail output that swings 15 mV from
the supply voltage, which increases system dynamic range.
The common mode input voltage range extends 200 mV be-
low the negative supply, thus the LMP2234 is ideal for ground
sensing in single supply applications.
The LMP2234 is offered in 14-Pin SOIC and TSSOP pack-
ages.
Typical Application
LMP
®
is a registered trademark of National Semiconductor Corporation.
®
precision amplifier family. The
202034
Strain Gauge Bridge Amplifier
Features
(For V
Applications
Supply current (per channel)
Low TCV
V
Input bias current
PSRR
CMRR
Open loop gain
Gain bandwidth product
Slew rate
Input voltage noise, f = 1 kHz
Temperature range
Rail-to-rail output
Precision instrumentation amplifiers
Battery powered medical instrumentation
High impedance sensors
Strain gauge bridge amplifier
Thermocouple amplifiers
OS
S
= 5V, Typical unless otherwise noted)
OS
±1.0 µV/°C (max)
20203468
September 2007
–40°C to 125°C
±150 µV (max)
www.national.com
60 nV/
130 kHz
58 V/ms
120 dB
120 dB
±20 fA
97 dB
9 µA
Hz

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lmp2234bmtx Summary of contents

Page 1

... LMP2234 is ideal for ground sensing in single supply applications. The LMP2234 is offered in 14-Pin SOIC and TSSOP pack- ages. Typical Application LMP ® registered trademark of National Semiconductor Corporation. © 2007 National Semiconductor Corporation Features (For V = 5V, Typical unless otherwise noted) S ■ ...

Page 2

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance(Note 2) Human Body Model Machine Model Differential Input Voltage Supply Voltage ( ...

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Symbol Parameter e Input-Referred Voltage Noise Density n Input-Referred Voltage Noise i Input-Referred Current Noise Density n THD+N Total Harmonic Distortion + Noise 3.3V DC Electrical Characteristics T = 25° 3.3V, V − ...

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DC Electrical Characteristics T = 25° 2.5V, V − Symbol Parameter V Input Offset Voltage OS TCV Input Offset Voltage Drift OS I Input Bias Current BIAS I Input Offset Current ...

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DC Electrical Characteristics T = 25° 2.0V 0V − Symbol Parameter V Input Offset Voltage OS TCV Input Offset Voltage Drift OS I Input Bias Current BIAS I Input ...

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... Part Number LMP2234AMA LMP2234AMAE LMP2234AMAX 14-Pin SOIC LMP2234BMA LMP2234BMAE LMP2234BMAX LMP2234AMT LMP2234AMTE LMP2234AMTX 14-Pin TSSOP LMP2234BMT LMP2234BMTE LMP2234BMTX Connection Diagram www.national.com , θ . The maximum allowable power dissipation at any ambient temperature is J(MAX) JA Temperature Package Marking Range LMP2234AMA LMP2234BMA -40°C to 125°C LMP2234AMT ...

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Typical Performance Characteristics − S Offset Voltage Distribution Offset Voltage Distribution Offset Voltage Distribution Unless otherwise Specified: T TCV 20203407 TCV 20203406 TCV 20203405 7 = 25° 5V /2, ...

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Offset Voltage Distribution Offset Voltage vs. V Offset Voltage vs. V www.national.com 20203403 CM 20203417 CM 20203465 8 TCV Distribution OS 20203408 Offset Voltage vs 20203464 Offset Voltage vs 20203418 ...

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Offset Voltage vs. Temperature 20203420 0 Voltage Noise 20203433 0 Voltage Noise 20203432 Offset Voltage vs. Supply Voltage 0 Voltage Noise 0 Voltage Noise ...

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Input Bias Current vs. V Input Bias Current vs. V Input Bias Current vs. V www.national.com Input Bias Current vs 20203455 Input Bias Current vs 20203457 Input Bias Current vs 20203459 10 CM 20203456 ...

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Input Bias Current vs 20203461 PSRR vs. Frequency 20203466 Sinking Current vs. Supply Voltage 20203413 Input Bias Current vs. V Supply Current vs. Supply Voltage (per channel) Sourcing Current vs. Supply Voltage 11 CM 20203462 20203412 20203414 www.national.com ...

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Output Swing High vs. Supply Voltage Open Loop Frequency Response Phase Margin vs. Capacitive Load www.national.com Output Swing Low vs. Supply Voltage 20203415 Open Loop Frequency Response 20203421 Slew Rate vs. Supply Voltage 20203463 12 20203416 20203422 20203430 ...

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THD+N vs. Amplitude 20203428 Large Signal Step Response 20203424 Large Signal Step Response 20203426 THD+N vs. Frequency Small Signal Step Response Small Signal Step Response 13 20203429 20203423 20203425 www.national.com ...

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CMRR vs. Frequency www.national.com Input Voltage Noise vs. Frequency 20203467 14 20203419 ...

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Application Information LMP2234 The LMP2234 is a quad CMOS precision amplifier that offers low offset voltage, low offset voltage drift, and high gain while consuming less than 10 μA of supply current per channel. The LMP2234 is a micropower op ...

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Figure 2 shows a schematic of this input voltage noise reduc- tion circuit using the LMP2234. Typical resistor values are: = 10Ω kΩ, and kΩ FIGURE 2. Noise Reduction Circuit ...

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SINGLE SUPPLY STRAIN GAUGE BRIDGE AMPLIFIER Strain gauges are popular electrical elements used to mea- sure force or pressure. Strain gauges are subjected to an unknown force which is measured as the deflection on a pre- viously calibrated scale. Pressure ...

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... Depending on the sensed gas and sensitivity of the sensor, the output current can be in the order of tens of microamperes to a few milliamperes. Gas sensor datasheets often specify a recommended load resistor value or they suggest a range of load resistors to choose from. Oxygen sensors are used when air quality or oxygen deliv- ered to a patient needs to be monitored ...

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Physical Dimensions inches (millimeters) unless otherwise noted 14-Pin SOIC NS Package Number M14A 14-Pin TSSOP NS Package Number MTC14 19 www.national.com ...

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... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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