LP211DRG4 Equivalent & Substitute Parts

Part Overview

The LP211DRG4 is a differential comparator IC manufactured by Texas Instruments in 8-SOIC surface mount packaging. This device features open-collector and open-emitter outputs suitable for general-purpose voltage comparison applications. The LP211DRG4 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Active alternatives from both Texas Instruments and Analog Devices Inc. provide functional equivalence with enhanced specifications and current product status.

Key Parameters

Parameter	LP211DRG4
Manufacturer	Texas Instruments
Type	Differential Comparator
Number of Elements	1
Output Type	Open-Collector, Open-Emitter
Voltage Supply Range (Single/Dual)	4.6V ~ 30V / ±1.75V ~ 15V
Input Offset Voltage (Max)	7.5mV @ ±15V
Input Bias Current (Max)	0.1µA @ ±15V
Quiescent Current (Max)	300µA
Operating Temperature Range	-25°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the LP211DRG4 is determined by the following critical parameters:

Electrical Compatibility Criteria:

Output type: Open-Collector configuration
Supply voltage range: Minimum 3V to 36V single supply or ±1.5V to ±18V dual supply
Package type: 8-SOIC surface mount form factor
Input offset voltage and bias current within acceptable design margins
Operating temperature range encompassing or exceeding -25°C ~ 85°C

Packaging Compatibility:

8-SOIC (0.154", 3.90mm Width) mechanical footprint
Surface mount mounting type
Moisture sensitivity level 1 (Unlimited)

Compliance Requirements:

ROHS3 compliance
REACH unaffected status

Substitute parts are grouped into two categories: direct parametric equivalents from Texas Instruments (LP211DR) and manufacturer-recommended alternatives from Analog Devices Inc. (LT1011 series variants). All listed substitutes maintain open-collector output architecture and 8-SOIC packaging, ensuring PCB-level compatibility without layout modifications.

Parameter Comparison

Parameter	LP211DRG4	LP211DR	LT1011AIS8#PBF	LT1011AIS8#TRPBF	LT1011CS8#PBF	LT1011CS8#TRPBF	LT1011IS8#PBF	LT1011IS8#TRPBF
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Type	Differential	Differential	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Output Type	Open-Collector, Open-Emitter	Open-Collector, Open-Emitter	Open-Collector	Open-Collector	Open-Collector	Open-Collector	Open-Collector	Open-Collector
Voltage Supply (Single/Dual)	4.6V ~ 30V / ±1.75V ~ 15V	4.6V ~ 30V / ±1.75V ~ 15V	3V ~ 36V / ±1.5V ~ 18V	3V ~ 36V / ±1.5V ~ 18V	3V ~ 36V / ±1.5V ~ 18V	3V ~ 36V / ±1.5V ~ 18V	3V ~ 36V / ±1.5V ~ 18V	3V ~ 36V / ±1.5V ~ 18V
Input Offset Voltage (Max)	7.5mV @ ±15V	7.5mV @ ±15V	0.75mV @ ±15V	0.75mV @ ±15V	2mV @ ±15V	2mV @ ±15V	2mV @ ±15V	2mV @ ±15V
Input Bias Current (Max)	0.1µA @ ±15V	0.1µA @ ±15V	0.035µA @ ±15V	0.035µA @ ±15V	0.065µA @ ±15V	0.065µA @ ±15V	0.065µA @ ±15V	0.065µA @ ±15V
Output Current (Typ)	—	—	50mA	50mA	50mA	50mA	50mA	50mA
Quiescent Current (Max)	300µA	300µA	4mA	4mA	4mA	4mA	4mA	4mA
CMRR (Typ)	—	—	115dB	115dB	115dB	115dB	115dB	115dB
Operating Temperature	-25°C ~ 85°C	-25°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

LP211DR (Texas Instruments): Direct parametric equivalent with identical electrical specifications and operating temperature range. Maintains Texas Instruments sourcing continuity. Product status is active, ensuring long-term availability. Recommended for designs requiring exact specification matching and single-source supplier preference.

LT1011AIS8#PBF and LT1011AIS8#TRPBF (Analog Devices Inc.): Enhanced performance variants with superior input offset voltage (0.75mV vs. 7.5mV) and lower input bias current (0.035µA vs. 0.1µA). Extended operating temperature range (-40°C ~ 85°C) provides additional margin for industrial applications. Available in tube and tape & reel packaging. Suitable for applications requiring tighter input specifications.

LT1011CS8#PBF and LT1011CS8#TRPBF (Analog Devices Inc.): Commercial-grade variants with operating temperature range 0°C ~ 70°C. Input offset voltage of 2mV and input bias current of 0.065µA represent mid-range performance. Available in tube and tape & reel packaging. Appropriate for standard commercial temperature environments.

LT1011IS8#PBF and LT1011IS8#TRPBF (Analog Devices Inc.): Industrial-grade variants with extended operating temperature range (-40°C ~ 85°C). Input specifications match LT1011CS8 series. Available in tube and tape & reel packaging. Recommended for industrial and automotive applications requiring wide temperature operation.

All substitute parts maintain ROHS3 compliance, moisture sensitivity level 1, and 8-SOIC surface mount packaging. Selection between Texas Instruments LP211DR and Analog Devices LT1011 series depends on supply chain strategy, performance requirements, and temperature operating range specifications.

Frequently Asked Questions (FAQ)

Q: Can LP211DR be used as a direct replacement for LP211DRG4? A: Yes. LP211DR is a parametric equivalent with identical electrical specifications, output type, supply voltage range, and operating temperature. Both devices are 8-SOIC surface mount packages with open-collector, open-emitter outputs. The primary difference is product status: LP211DRG4 is obsolete while LP211DR is active.

Q: What are the key differences between LP211 and LT1011 series comparators? A: Both families provide open-collector output comparators in 8-SOIC packaging. LT1011 variants offer improved input offset voltage (0.75mV to 2mV vs. 7.5mV) and lower input bias current (0.035µA to 0.065µA vs. 0.1µA). LT1011 series also provides higher output current capability (50mA typical) and superior CMRR (115dB). Supply voltage ranges are slightly wider for LT1011 (3V ~ 36V vs. 4.6V ~ 30V single supply).

Q: Are packaging options interchangeable between substitute parts? A: All listed substitutes use identical 8-SOIC (0.154", 3.90mm Width) surface mount packaging. Packaging variants (tube, tape & reel, cut tape & digi-reel) refer to distribution format only and do not affect PCB compatibility. Select packaging based on production volume and handling requirements.

Q: Which substitute is best for extended temperature applications? A: LT1011AIS8#PBF, LT1011AIS8#TRPBF, LT1011IS8#PBF, and LT1011IS8#TRPBF all support -40°C ~ 85°C operating range, exceeding the LP211DRG4 specification of -25°C ~ 85°C. LT1011CS8 variants are limited to 0°C ~ 70°C and are not suitable for extended low-temperature applications.

Q: Do all substitutes maintain compliance certifications? A: Yes. All listed substitute parts are ROHS3 compliant, REACH unaffected, and have moisture sensitivity level 1 (unlimited). Compliance certifications are maintained across all alternatives.

Q: What is the impact of lower input offset voltage in LT1011 variants? A: Lower input offset voltage (0.75mV to 2mV vs. 7.5mV) improves threshold accuracy and reduces temperature drift effects. This is beneficial for precision threshold detection applications but requires no circuit modifications. Existing designs using LP211DRG4 will function with LT1011 substitutes without redesign.

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