MAX6198CESA Series Voltage Reference IC Equivalent & Substitute Parts

Part Overview

The MAX6198CESA is a series voltage reference IC manufactured by Analog Devices Inc./Maxim Integrated, designed to provide a fixed 4.096V output with ±0.24% tolerance. This device operates as a precision voltage reference for analog and mixed-signal applications requiring stable reference voltages across industrial temperature ranges (-40°C to 85°C). The MAX6198CESA is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. Active alternatives with improved performance characteristics and extended temperature ranges are available from the same manufacturer.

Key Parameters

Parameter	MAX6198CESA
Output Voltage (Fixed)	4.096V
Output Current	500 µA
Tolerance	±0.24%
Temperature Coefficient	25 ppm/°C
Noise (0.1Hz to 10Hz)	100 µVp-p
Noise (10Hz to 10kHz)	200 µVrms
Input Voltage Range	4.296V ~ 12.6V
Supply Current	35 µA
Operating Temperature	-40°C ~ 85°C
Package	8-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the MAX6198CESA is determined by the following critical parameters: fixed output voltage of 4.096V, 8-SOIC package compatibility, surface mount mounting type, and electrical performance within acceptable operating ranges. Substitute parts are grouped into two categories:

Direct Functional Equivalent (Same Output Current Class):

MAX6198CESA+ provides identical electrical specifications with improved product status (Active) and RoHS3 compliance. This is a direct replacement with packaging upgrade from loose to tube.

Enhanced Performance Alternatives (Higher Output Current, Improved Specifications):

ADR292 series (ADR292ERZ, ADR292ERZ-REEL, ADR292FRZ, ADR292FRZ-REEL7, ADR292GRZ, ADR292GRZ-REEL7) and ADR4540 series (ADR4540ARZ, ADR4540ARZ-R7, ADR4540BRZ) offer higher output current (5 mA to 10 mA), improved tolerance (±0.02% to ±0.15%), lower temperature coefficients (2 ppm/°C to 25 ppm/°C), and extended operating temperature ranges (-40°C to 125°C). These parts maintain the 4.096V fixed output and 8-SOIC package format.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Tolerance	Temp Coeff	Input Voltage	Operating Temp	Package	Product Status	RoHS Status
MAX6198CESA	Analog Devices/Maxim	4.096V	500 µA	±0.24%	25 ppm/°C	4.296V ~ 12.6V	-40°C ~ 85°C	8-SOIC	Obsolete	Non-compliant
MAX6198CESA+	Analog Devices/Maxim	4.096V	500 µA	±0.24%	25 ppm/°C	4.296V ~ 12.6V	-40°C ~ 85°C	8-SOIC	Active	RoHS3 Compliant
ADR292ERZ	Analog Devices	4.096V	5 mA	±0.07%	8 ppm/°C	5V ~ 15V	-40°C ~ 125°C	8-SOIC	Active	RoHS3 Compliant
ADR292ERZ-REEL	Analog Devices	4.096V	5 mA	±0.07%	8 ppm/°C	5V ~ 15V	-40°C ~ 125°C	8-SOIC	Active	RoHS3 Compliant
ADR292FRZ	Analog Devices	4.096V	5 mA	±0.1%	15 ppm/°C	5V ~ 15V	-40°C ~ 125°C	8-SOIC	Active	RoHS3 Compliant
ADR292FRZ-REEL7	Analog Devices	4.096V	5 mA	±0.1%	15 ppm/°C	5V ~ 15V	-40°C ~ 125°C	8-SOIC	Active	RoHS3 Compliant
ADR292GRZ	Analog Devices	4.096V	5 mA	±0.15%	25 ppm/°C	5V ~ 15V	-40°C ~ 125°C	8-SOIC	Active	RoHS3 Compliant
ADR292GRZ-REEL7	Analog Devices	4.096V	5 mA	±0.15%	25 ppm/°C	5V ~ 15V	-40°C ~ 125°C	8-SOIC	Active	RoHS3 Compliant
ADR4540ARZ	Analog Devices	4.096V	10 mA	±0.04%	4 ppm/°C	4.2V ~ 15V	-40°C ~ 125°C	8-SOIC	Active	RoHS3 Compliant
ADR4540ARZ-R7	Analog Devices	4.096V	10 mA	±0.04%	4 ppm/°C	4.2V ~ 15V	-40°C ~ 125°C	8-SOIC	Active	RoHS3 Compliant
ADR4540BRZ	Analog Devices	4.096V	10 mA	±0.02%	2 ppm/°C	4.2V ~ 15V	-40°C ~ 125°C	8-SOIC	Active	RoHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select MAX6198CESA+ when the original MAX6198CESA specifications are required. This part maintains 500 µA output current, ±0.24% tolerance, and -40°C to 85°C operating range. The primary advantage is active product status and RoHS3 compliance, eliminating obsolescence risk and regulatory concerns.

For Enhanced Performance Applications: The ADR292 series provides improved tolerance (±0.07% to ±0.15%), lower temperature coefficients (8 ppm/°C to 15 ppm/°C), and extended temperature range (-40°C to 125°C) while maintaining 5 mA output current. Select based on tolerance and temperature coefficient requirements:

ADR292ERZ for ±0.07% tolerance and 8 ppm/°C temperature coefficient
ADR292FRZ for ±0.1% tolerance and 15 ppm/°C temperature coefficient
ADR292GRZ for ±0.15% tolerance and 25 ppm/°C temperature coefficient (closest match to MAX6198CESA tolerance)

For Highest Precision Applications: The ADR4540 series delivers superior performance with 10 mA output current, tolerance down to ±0.02%, and temperature coefficients as low as 2 ppm/°C. Select ADR4540BRZ for maximum precision requirements or ADR4540ARZ for balanced performance and cost.

Packaging Considerations: All substitute parts are available in 8-SOIC package format compatible with MAX6198CESA footprints. Tube packaging (standard) and Tape & Reel variants are available for different procurement and assembly requirements. All substitute parts carry RoHS3 compliance and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can MAX6198CESA+ be used as a direct drop-in replacement for MAX6198CESA? A: Yes. MAX6198CESA+ provides identical electrical specifications (4.096V output, 500 µA current, ±0.24% tolerance, 25 ppm/°C temperature coefficient) and operates within the same temperature range (-40°C to 85°C). The primary differences are active product status and RoHS3 compliance. Pin configuration and 8-SOIC package are identical.

Q: What are the key differences between MAX6198CESA and ADR292 series parts? A: The ADR292 series offers higher output current (5 mA vs. 500 µA), improved tolerance (±0.07% to ±0.15% vs. ±0.24%), lower temperature coefficients (8 ppm/°C to 15 ppm/°C vs. 25 ppm/°C), and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C). Input voltage range is also wider (5V to 15V vs. 4.296V to 12.6V). All maintain the 4.096V fixed output and 8-SOIC package.

Q: When should ADR4540 series be selected over ADR292 series? A: Select ADR4540 when applications require the highest precision voltage reference. ADR4540 provides 10 mA output current, tolerance down to ±0.02%, and temperature coefficients as low as 2 ppm/°C. These specifications are superior to ADR292 series and justify selection for precision instrumentation, data acquisition, and calibration applications.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All substitute parts listed (MAX6198CESA+, ADR292 series, and ADR4540 series) are RoHS3 compliant. The original MAX6198CESA is RoHS non-compliant, making substitution necessary for applications requiring regulatory compliance.

Q: What packaging options are available for substitute parts? A: Substitute parts are available in Tube packaging (standard), Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel® formats. Selection depends on procurement volume and assembly process requirements. All variants maintain identical electrical specifications and 8-SOIC package footprint.

Q: Can ADR292GRZ be used as a substitute if tolerance matching is critical? A: ADR292GRZ provides ±0.15% tolerance and 25 ppm/°C temperature coefficient, which are closer to MAX6198CESA specifications (±0.24% tolerance, 25 ppm/°C) than other ADR292 variants. However, the improved tolerance of ADR292GRZ (±0.15%) is tighter than the original part. For applications requiring exact tolerance matching, MAX6198CESA+ is the appropriate choice.

Q: What is the impact of higher output current in substitute parts? A: ADR292 series (5 mA) and ADR4540 series (10 mA) provide higher output current than MAX6198CESA (500 µA). This allows these parts to drive higher load currents while maintaining voltage regulation. Applications with low-impedance loads benefit from this capability. For applications with minimal load current, the higher output current does not negatively impact performance.

Q: Are there input voltage range differences that affect circuit design? A: Yes. MAX6198CESA operates with 4.296V to 12.6V input range, while ADR292 series requires 5V to 15V and ADR4540 series operates with 4.2V to 15V. Verify that power supply voltage falls within the selected part's input range. ADR4540 series provides the widest lower input voltage limit (4.2V), beneficial for low-voltage applications.

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