-

+

1/2

LMP2022

0.1 PF

-

+

1/2

LMP2022

0.1 PF

5.1 k:

0.1%

5.1 k:

0.1%

200:

200:

280:

VA

VA

+

-

VA

LMP2021

ADC161S626

+

VR = 1/2 VA

-

1 k:

1 k:

R3

R4

R1

R2

VA

EMI

180:

470 pF

VA = 5V

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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.

LMP2021, LMP2022

SNOSAY9G – SEPTEMBER 2008 – REVISED FEBRUARY 2016

LMP202x Zero-Drift, Low-Noise, EMI-Hardened Amplifiers

1

1 Features

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

•

CMRR 139 dB

•

PSRR 130 dB

•

Supply Voltage Range 2.2 V to 5.5 V

•

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 VSSOP and 8-Pin SOIC

Packages

2 Applications

•

Precision Instrumentation Amplifiers

•

Battery Powered Instrumentation

•

Thermocouple Amplifiers

•

Bridge Amplifiers

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.

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.

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.

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.

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.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LMP2021

SOIC (8)

4.90 mm x 3.91 mm

SOT-23 (5)

2.90 mm x 1.60 mm

LMP2022

SOIC (8)

4.90 mm x 3.91 mm

VSSOP (8)

3.00 mm x 3.00 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Bridge Amplifier

The LMP202x support systems with up to 24 bits of accuracy.