MAX982CSA Equivalent & Substitute Parts

Part Overview

The MAX982CSA is a dual comparator with integrated voltage reference manufactured by Analog Devices Inc./Maxim Integrated. This linear integrated circuit operates across a supply voltage range of 2.5V to 11V (single supply) or ±1.25V to 5.5V (dual supply), with a 50mV hysteresis and 80dB CMRR/PSRR performance. The device is packaged in an 8-SOIC surface-mount configuration.

The MAX982CSA is classified as obsolete. Locating equivalent or substitute components is necessary for new designs, production continuity, or system upgrades where active alternatives with comparable electrical and mechanical specifications are required.

Key Parameters

Parameter	Value
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Linear Comparator
Type	Comparator with Voltage Reference
Number of Elements	2
Voltage Supply (Single/Dual)	2.5V ~ 11V / ±1.25V ~ 5.5V
Voltage - Input Offset (Max)	10mV @ 5V
Current - Quiescent (Max)	6µA
CMRR / PSRR (Typ)	80dB / 80dB
Hysteresis	50mV
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX982CSA is determined by the following critical parameters:

Electrical Compatibility:

Supply voltage range: 2.5V ~ 11V (single) or ±1.25V ~ 5.5V (dual)
Input offset voltage: 10mV @ 5V maximum
Quiescent current: 5.7µA to 6µA
CMRR/PSRR: 80dB minimum
Hysteresis: 50mV
Number of comparator elements: 2

Mechanical Compatibility:

Package type: 8-SOIC surface-mount
Package width: 0.154" (3.90mm)
Mounting: Surface mount

Compliance Requirements:

RoHS3 compliance
MSL rating: 1 (Unlimited)

Substitute parts must match all electrical parameters within the specified tolerances and maintain identical package and mounting specifications. The MAX982CSA+ (active variant with tube packaging) and the LTC1842/LTC1843 series (open-drain output variants) satisfy these criteria across multiple packaging options (tube and tape & reel).

Parameter Comparison

Part Number	Manufacturer	Product Status	Supply Voltage	Input Offset (Max)	Quiescent Current (Max)	CMRR/PSRR	Hysteresis	Operating Temp	Output Type	Packaging	Inventory
MAX982CSA	Analog Devices Inc./Maxim Integrated	Obsolete	2.5V ~ 11V / ±1.25V ~ 5.5V	10mV @ 5V	6µA	80dB / 80dB	50mV	0°C ~ 70°C	—	8-SOIC	33,998 Pcs
MAX982CSA+	Analog Devices Inc./Maxim Integrated	Active	2.5V ~ 11V / ±1.25V ~ 5.5V	10mV @ 5V	6µA	80dB / 80dB	50mV	0°C ~ 70°C	—	8-SOIC (Tube)	1,009 Pcs
LTC1842CS8#PBF	Analog Devices Inc.	Active	2.5V ~ 11V / ±1.25V ~ 5.5V	10mV @ 5V	5.7µA	80dB / 80dB	50mV	0°C ~ 70°C	Open-Drain	8-SO (Tube)	1,239 Pcs
LTC1842CS8#TRPBF	Analog Devices Inc.	Active	2.5V ~ 11V / ±1.25V ~ 5.5V	10mV @ 5V	5.7µA	80dB / 80dB	50mV	0°C ~ 70°C	Open-Drain	8-SO (Tape & Reel)	2,352 Pcs
LTC1842IS8#PBF	Analog Devices Inc.	Active	2.5V ~ 11V / ±1.25V ~ 5.5V	10mV @ 5V	5.7µA	80dB / 80dB	50mV	-40°C ~ 85°C	Open-Drain	8-SO (Tube)	2,994 Pcs
LTC1842IS8#TRPBF	Analog Devices Inc.	Active	2.5V ~ 11V / ±1.25V ~ 5.5V	10mV @ 5V	5.7µA	80dB / 80dB	50mV	-40°C ~ 85°C	Open-Drain	8-SO (Tape & Reel)	8,502 Pcs
LTC1843CS8#PBF	Analog Devices Inc.	Active	2.5V ~ 11V / ±1.25V ~ 5.5V	10mV @ 5V	5.7µA	80dB / 80dB	50mV	0°C ~ 70°C	Open-Drain	8-SO (Tube)	2,006 Pcs
LTC1843CS8#TRPBF	Analog Devices Inc.	Active	2.5V ~ 11V / ±1.25V ~ 5.5V	10mV @ 5V	5.7µA	80dB / 80dB	50mV	0°C ~ 70°C	Open-Drain	8-SO (Tape & Reel)	3,838 Pcs
LTC1843IS8#PBF	Analog Devices Inc.	Active	2.5V ~ 11V / ±1.25V ~ 5.5V	10mV @ 5V	5.7µA	80dB / 80dB	50mV	-40°C ~ 85°C	Open-Drain	8-SO (Tube)	2,700 Pcs
LTC1843IS8#TRPBF	Analog Devices Inc.	Active	2.5V ~ 11V / ±1.25V ~ 5.5V	10mV @ 5V	5.7µA	80dB / 80dB	50mV	-40°C ~ 85°C	Open-Drain	8-SO (Tape & Reel)	6,023 Pcs

Engineering Selection Recommendations

Direct Replacement (Identical Specifications): MAX982CSA+ is the active production equivalent of the obsolete MAX982CSA. Both devices share identical electrical specifications, operating temperature range (0°C ~ 70°C), and package configuration. Selection of MAX982CSA+ is appropriate for designs requiring exact functional equivalence with current manufacturing support.

Alternative Substitutes (Open-Drain Output Variants): The LTC1842 and LTC1843 series devices are functionally compatible substitutes with the following considerations:

LTC1842CS8#PBF and LTC1842CS8#TRPBF: Commercial temperature range (0°C ~ 70°C), matching the MAX982CSA operating window
LTC1842IS8#PBF and LTC1842IS8#TRPBF: Industrial temperature range (-40°C ~ 85°C), extended operating capability
LTC1843CS8#PBF and LTC1843CS8#TRPBF: Commercial temperature range (0°C ~ 70°C)
LTC1843IS8#PBF and LTC1843IS8#TRPBF: Industrial temperature range (-40°C ~ 85°C)

All substitute parts maintain RoHS3 compliance and MSL rating 1 (Unlimited). The primary electrical difference is the open-drain output configuration in LTC1842/LTC1843 variants, which requires external pull-up resistors in applications originally designed for the MAX982CSA output stage.

Packaging Considerations: Tube packaging (suffix #PBF) is suitable for manual assembly and lower-volume applications. Tape & Reel packaging (suffix #TRPBF) is optimized for automated pick-and-place assembly and high-volume production.

Frequently Asked Questions (FAQ)

Q: Can LTC1842 or LTC1843 devices directly replace MAX982CSA in existing designs?

A: Electrical substitution is valid within the specified parameter ranges. However, the open-drain output configuration of LTC1842/LTC1843 differs from the MAX982CSA output stage. Circuit designs must accommodate external pull-up resistors if the original design does not include them. Verify output stage compatibility before implementation.

Q: What is the difference between LTC1842 and LTC1843 series?

A: Both series maintain identical electrical specifications (supply voltage, input offset, quiescent current, CMRR/PSRR, hysteresis). The distinction is in the base product number designation. Both are functionally equivalent for substitution purposes.

Q: Does operating temperature range affect substitution suitability?

A: The MAX982CSA operates from 0°C to 70°C. LTC1842/LTC1843 devices with "C" suffix (CS8) match this range. Variants with "I" suffix (IS8) extend to -40°C to 85°C and are suitable for applications requiring wider temperature operation. Selection depends on the target application's thermal requirements.

Q: What is the significance of packaging codes #PBF and #TRPBF?

A: #PBF denotes tube packaging for manual or semi-automated assembly. #TRPBF denotes tape & reel packaging for automated assembly lines. Both contain identical die and electrical performance; packaging selection is determined by manufacturing process requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL rating 1 (Unlimited), matching the environmental and reliability certifications of the MAX982CSA.

Q: Why is MAX982CSA+ listed as a substitute if it is the same part?

A: MAX982CSA+ is the active production variant of the obsolete MAX982CSA. The "+" suffix indicates current manufacturing status and tube packaging. Functionally and electrically identical, MAX982CSA+ is the direct replacement for new designs or production continuity.

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