Featured Products

Ideal for sensing in battery-power devices

Ultra-Low Operating Current 160nA,
Low Offset Voltage High Accuracy
Op Amp
LMR1901YG-M© 2024 ROHM Co., Ltd.

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Overview: Ultra-Low Current Low Offset Voltage High Accuracy Op Amp
The LMR1901YG-M is an ultra-low current Op Amp ideal for battery operated equipment. Features include minimal variations inoperating current due to changes in power supply voltage and temperature along with superior input offset voltage characteristics despite being an ultra-low current product - making it suitable for a wide range of applications beyond sensing.

Features・Ultra-low current operation contributes to longer operation of battery-powered devices
Nano Energy

technology provides unmatched low current operation: 160nA (Typ) at 3.0V supply voltage

・Stable current characteristics support a wide range of applications

Minimal variation in operating current due to changes in power supply voltage and temperature supports rail-to-rail input/output

・Excellent input offset voltage characteristics facilitate compensation design

Guarantees a max. input offset voltage and temperature drift of 0.55mV and 7.0µV/°C, respectively, while achieving ultra-low
current consumption”Nano Energy ” and ”ComfySIL ” are trademarks or registered trademarks of ROHM Co., Ltd.

SSOP5
2.90×2.80×1.25mm© 2024 ROHM Co., Ltd.

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Ultra-low Current Operation Contributes to Longer Battery Life
Mechanism and Characteristics Required for Low Current Operation
Operating Current Comparison

The Role of Op Amps in Sensing Applications
Sensor Output Signal

Op Amp Output Signal[nA]
800700600(Of Ultra-Low Current Products with a Current
Consumption of 500nA or less)

Achieves an unparalleled level ofperformance vs general ultra-lowcurrent products

500Op AmpMCU

300200Light・ Temperature ・ Pressure ・Acceleration Sensors

Amplifies weak signals output from sensors
and transmits them to the MCU

Often used in battery-driven sets or equipment inconstant operation

450

400

270260GeneralProduct BGeneral
Product C

1601000

New Product General
LMR1901YG-M Product A

Low current Op Amp enables long-term sensing operation© 2024 ROHM Co., Ltd.

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Stable Current Characteristics Support a Variety of Applications
The operating environment has little effect on battery life
Operating Current vs Ambient Temperature

Operating Current vs Supply Voltage

250

Minimal change in operating
current with changes insupply voltage
200

Supply Current IDD [nA]

Supply Current IDD [nA]250

Ta=−40°C
Ta=+25°C

150
Ta=+105°C
100

1234Supply Voltage VS [V]56

Small change in operating
current with respect totemperature change
200

V S =5.0V

150

100-50VS=1.7V-250

VS=3.0V

2550

75100125

Ambient Temperature Ta [°C]Stable, low-current operation reduces battery drain in automotive systems*and other applications exposed to harsh environments*AEC-Q100 (Grade 2) Qualified© 2024 ROHM Co., Ltd.

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Excellent Input Offset Voltage Characteristics Facilitate Compensation DesignAchieves outstanding 0.55mV (Max) for ultra-low current products of 500nA or less
Input Offset Voltage Comparison

9870.6Provides superior offset voltage
characteristics vs general ultra-lowcurrent types

64.55432
10

1.30.55
New Product
LMR1901YG-MGeneral
Product AGeneral
Product B

1.0General
Product C

Input Offset Voltage VIO [mV]

Input Offset Voltage VIO [mV]10Input Offset vs Ambient Temperature(Of ultra-Low Current Products with aCurrent Consumption of 500nA or less)

0.4

Minimal temperature variation of theinput offset voltage: 7.0µV/°C (Max)0.2
0.0-0.2

Vs=1.7V

Vs=3.0V

Vs=5.0V-0.4-0.6-50-25025

5075

100125

Ambient Temperature Ta [°C]

Excellent input offset voltage characteristics facilitatecompensation design, even with ultra-low current products© 2024 ROHM Co., Ltd.

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Key Specifications
Part No.

chSupplyVoltage [V]LMR1901YG-M11.7 to 5.5Circuit
Current(Typ)
[nA]
160

Input Equivalent
Input Offset
ComfySIL
InputAutomotive
OperatingNoiseVoltage
Offset Voltage
GradeTemperature Package Functional safety
Temperature Drift Voltage Density(Max) [mV]
Category(AEC-Q100)[°C](Max) [μV/°C](Typ) [nV/√Hz]
0.55

7.0740−40 to +105

SSOP5FS supportive*Grade 2* FS supportive: ICs developed for automotive use that can support safety analysis related to functional safety.
Click on theApplication Examples

icon to access the product page andThe Effects of Nano Energy
Technology on ROHM’s New Products
Nano Energy Technology
Overview

Various sensing applications such as
drive recorders and anti-theft devices
that operate even when parked
AEC-Q100 (Grade 2) qualified

Optimized for battery-operated sensing
applications such as monitoring equipment andportable devices

to view the datasheet on ROHM’s website.

High performance reference voltage
Circuit Design circuitachieves both ultra-low current
consumption and superior response

LayoutProcesses

Low current consumption throughthe development of high-density,
high-resistance elements
Promotes low noise with highaccuracy by coordinating
circuits and elements

Nano Energy refers to ultra-low
current consumption technology
achieved by combining analog
circuit design, layout, and processes
leveraging ROHM’s verticallyintegrated production system.
The LMR1901YG-M utilizes a newly
developed reference current source
based on this technology to achieve
an operating current of just 160nA
by thoroughly suppressing current
increase due to temperature.

”Nano Energy ” and ”ComfySIL ” are trademarks or registered trademarks of ROHM Co., Ltd.
© 2024 ROHM Co., Ltd.

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Notice The information contained in this document is intended to introduce ROHM Group (hereafter referred to as ROHM)
products. When using ROHM products, please verify the latest specifications or datasheets before use.
 ROHM does not warrant that the information contained herein is error-free. ROHM shall not be in any way responsible
or liable for any damages, expenses, or losses incurred by you or third parties resulting from errors contained in thisdocument.
 The information and data described in this document, including typical application circuits, are examples only and arenot intended to guarantee to be free from infringement of third parties intellectual property or other rights. ROHM does
not grant any license, express or implied, to implement, use, or exploit any intellectual property or other rights owned
or controlled by ROHM or any third parties with respect to the information and data contained herein.
 When exporting ROHM products or technologies described in this document to other countries, you must abide by theprocedures and provisions stipulated in all applicable export laws and regulations, such as the Foreign Exchange andForeign Trade Act and the US Export Administration Regulations, and follow the necessary procedures in accordancewith these provisions.
 No part of this document may be reprinted or reproduced in any form by any means without the prior written consent ofROHM.
 The information contained in this document is current as of February 2024 and is subject to change without notice.

【O_187】Catalog No.66OP7378E 02.2024 PDF © 2024 ROHM Co., Ltd.