Features (Typical Values, TA = 25°C, VS = 5V) 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 CMRR 139 dB PSRR 130 dB Supply voltage range 2.2V to 5.5V Supply current (per amplifier) 1.1 mA Input bias current ±25 pA GBW 5 MHz Slew rate 2.6 V/µs Operating temperature range −40°C to 125°C 5-Pin SOT-23, 8-Pin MSOP and 8-Pin SOIC Packages Description The LMP2021/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. The LMP2021/LMP2022 have 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. The proprietary continuous correction circuitry guarantees impressive CMRR and PSRR, removes the 1/f noise component, and eliminates the need for calibration in many circuits. With only 260 nVPP (0.1 Hz to 10 Hz) of input voltage noise and no 1/f noise component, the LMP2021/LMP2022 are suitable for low frequency applications such as industrial precision weigh scales. The low input bias current of 23 pA makes these excellent choices for high source impedance circuits such as non-invasive medical instrumentation as well as test and measurement equipment. 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 LMP2021/LMP2022 are ideal for position sensors, bridge sensors, pressure sensors, medical equipment and other high accuracy applications with very low error budgets. The LMP2021 is offered in 5-Pin SOT-23 and 8-Pin SOIC packages. The LMP2022 is offered in 8-Pin MSOP and 8-Pin SOIC packages. Applications Precision instrumentation amplifiers Battery powered instrumentation Thermocouple amplifiers Bridge amplifiers

Also Recommended LMP2022▲ Dual Channel Version

Typical Application *click for larger image	Connection Diagram *click for larger image
Typical Performance *click for larger image

Parameters / Values	LMP2021	LMP2022
Offset Voltage max, 25C	0.005 mV	0.005 mV
TcVos	0.004 uV/degC	0.004 uV/degC
CMRR	139 dB	139 dB
PSRR	139 dB	139 dB
Avol	160 dB	160 dB
Voltage Noise	11 nV/root(Hz)	11 nV/root(Hz)
Max Input Bias Current	0.025 nA	0.025 nA
Gain Bandwidth	5 MHz	5 MHz
Supply Current Per Channel	1.1 mA	1.1 mA
PowerWise Rating 2	220 uA/MHz	220 uA/MHz
Slew Rate	2.6 Volts/usec	2.6 Volts/usec
Channels	1 Channels	2 Channels
Supply Min	2.2 Volt	2.2 Volt
Supply Max	5.5 Volt	5.5 Volt
Input OutputType	Vcm to V-, R-R Out	Vcm to V-, R-R Out
Output Current	50 mA	50 mA
Shut down	No	No
Special Features	Low Noise, EMI Hardened	Low Noise, EMI Hardened
Temperature Min	-40 deg C	-40 deg C
Temperature Max	125 deg C	125 deg C
Function	Op Amp	Op Amp
Automotive	Yes	Yes
PowerWise	No	No

Datasheets

Title		Size	Date	Other Language
	LMP2021 Zero Drift, Low Noise, EMI Hardened Amplifier	688 Kbytes	23-Jul-09	日本語

Application Notes

Title		Size	Date	Other Language
	AN-1932: Application Note 1932 LMP2021MAEVAL - Bridge Sensor Instrumentation Amplifier Evaluation Board User Guide	176 Kbytes	10-Dec-08

Other Technical Documents

Title		Type	Date
	Noise in Chopper-Stabilized Amplifier Applications	External Article	2009-04-01
	Don’t Let EMI Disrupt the Signal Path in Your Medical Diagnostic Equipment (Discusses EMI-Hardened Op Amps)	External Article	2010-09-15

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LMP2021MA/NOPB RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 185 DIGI-KEY Worldwide 12001 FARNELL Europe and Asia 167 NEWARK Americas 167	$1.25 each at 1K+ pcs	rail of 95
LMP2021MAX/NOPB RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 2500 DIGI-KEY Worldwide 0	$1.25 each at 1K+ pcs	reel of 2500
LMP2021MF/NOPB RoHS Status	SOT-23	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$1.25 each at 1K+ pcs	reel of 1000
LMP2021MFE/NOPB RoHS Status	SOT-23	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 88 AVNET-EM Worldwide 404 DIGI-KEY Worldwide 67 FARNELL Europe and Asia 222 NEWARK Americas 222 TAYLOR Americas 188	$1.25 each at 1K+ pcs	reel of 250
LMP2021MFX/NOPB RoHS Status	SOT-23	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$1.25 each at 1K+ pcs	reel of 3000

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMP2021.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMP2021 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LMP2021MAEVAL	LMP2021MA Bridge Sensor Instrumentation Amplifier Evaluation Board	Full production	Distributor Region Qty DIGI-KEY Worldwide 0	$100.00 each	1
Description: The LMP2021MAEVAL Instrumentation Amplifier Evaluation Board is configured as a differential-in, differential-out amplifier using the LMP2021. Also included is a precision reference and buffer to drive a bridge sensor. The board is set up to be used with the ADC141S626 Evaluation Board (Part Number: ADC141S626EB). Contents: LMP2021MA Evaluation Board LMP2021 Datasheet AN-1932

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LMP2021MA/NOPB	69.761	SOIC NARROW	8	1	260	Detail	Download	spice file	NSZXTT LMP20 21MA
LMP2021MAX/NOPB	69.761	SOIC NARROW	8	1	260	Detail	Download	spice file	NSZXTT LMP20 21MA
LMP2021MF/NOPB	14.696	SOT-23	5	1	260	Detail	Download	spice file	AF5A XTT
LMP2021MFE/NOPB	14.696	SOT-23	5	1	260	Detail	Download	spice file	AF5A XTT
LMP2021MFX/NOPB	14.696	SOT-23	5	1	260	Detail	Download	spice file	AF5A XTT

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMP2021.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMP2021 is located at RoHS Status.

CAD Symbols and Models Download LMP2021 CAD Symbols

Models spice file

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LMP2021MA	VIP50CLZ3	0	5670	0	0	945000	4	268146330
LMP2021MAX	VIP50CLZ3	0	5670	0	0	945000	4	268146330
LMP2021MF	VIP50CLZ3	0	5670	0	0	945000	4	268146330
LMP2021MFE	VIP50CLZ3	0	5670	0	0	945000	4	268146330
LMP2021MFX	VIP50CLZ3	0	5670	0	0	945000	4	268146330

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMP2021.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMP2021 is located at RoHS Status.

Zero Drift Amplifiers for Sensor Interface Applications Loading video... EMI-Hardened Op Amp Demo Loading video... Data Acquisition In Factory Automation Loading video... Weigh an Eyelash--Build a Microgram Scale with Precision Amps Loading video... Factory Automation Overview Loading video... Sensing Solutions In Factory Automation Loading video... Finding the Right Precision Op Amp - A Graphical Approach Loading video...

Zero Drift Amplifiers for Sensor Interface Applications Date: 2009-02-03 Length: 00:48:09 EMI-Hardened Op Amp Demo Date: 2010-04-14 Length: 0:2:06 Data Acquisition In Factory Automation Date: 2009-08-24 Length: 0:31:29 Weigh an Eyelash--Build a Microgram Scale with Precision Amps Date: 2010-03-02 Length: 0:03:16 Factory Automation Overview Date: 2009-08-04 Length: 0:32:30 Sensing Solutions In Factory Automation Date: 2009-07-10 Length: 0:50:00 Finding the Right Precision Op Amp - A Graphical Approach Date: 2009-10-22 Length: 00:10:40