LMC6022IM CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The LMC6022IM is a dual-channel CMOS amplifier integrated circuit manufactured by Texas Instruments in 8-SOIC surface mount packaging. This device is classified as obsolete product status, which necessitates identification of equivalent and substitute components for ongoing design support and procurement continuity. The LMC6022IM operates across a wide supply voltage range of 4.75V to 15.5V with ultra-low input bias current of 0.04 pA, making it suitable for high-impedance signal conditioning applications. Due to its obsolete classification, alternative parts with compatible electrical and mechanical characteristics are required for new designs and production continuity.

Key Parameters

Parameter	Value	Unit
Manufacturer	Texas Instruments
Part Number	LMC6022IM
Category	Linear, Amplifiers
Amplifier Type	CMOS
Number of Circuits	2
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	0.11	V/µs
Gain Bandwidth Product	350	kHz
Current - Input Bias	0.04	pA
Voltage - Input Offset	1	mV
Current - Supply	86	µA (x2 Channels)
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	4.75	V
Voltage - Supply Span (Max)	15.5	V
Operating Temperature	-40 to 85	°C
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the LMC6022IM requires matching of critical electrical and mechanical parameters within the allowed tolerance bands for this CMOS amplifier category. The primary substitution criteria are:

Mechanical Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure PCB layout compatibility without redesign.

Electrical Compatibility: Substitute parts must operate within the supply voltage range of 4.75V to 15.5V minimum. The input bias current specification of 0.04 pA establishes the ultra-low leakage requirement. The dual-channel configuration (2 circuits) is mandatory. Operating temperature range must encompass or exceed the -40°C to 85°C specification of the main part.

Functional Parameters: Slew rate of 0.11V/µs and gain bandwidth product of 350 kHz define the signal processing capability. Substitute parts with equal or superior performance in these parameters are acceptable. Input offset voltage of 1 mV and output current per channel of 40 mA establish baseline performance thresholds.

Compliance Considerations: RoHS compliance status and product lifecycle status (Active vs. Obsolete/Last Time Buy) are secondary selection criteria that support long-term procurement viability.

Substitute parts are grouped into three categories based on amplifier type: CMOS amplifiers with direct functional equivalence, Chopper (Zero-Drift) amplifiers with enhanced precision characteristics, and General Purpose amplifiers with broader performance envelopes.

Parameter Comparison

Parameter	LMC6022IM	LMC6022IM/NOPB	AD8639WARZ	AD8639WARZ-R7	AD8639WARZ-RL	AD8666WARZ-R7	AD8666WARZ-RL	ICL7621DCSA+	ICL7621DCSA+T	ICL7621DESA+	MAX417CSA+
Manufacturer	TI	TI	ADI	ADI	ADI	ADI	ADI	ADI/Maxim	ADI/Maxim	ADI/Maxim	ADI/Maxim
Amplifier Type	CMOS	CMOS	Chopper (Zero-Drift)	Chopper (Zero-Drift)	Chopper (Zero-Drift)	General Purpose	General Purpose	CMOS	CMOS	CMOS	General Purpose
Number of Circuits	2	2	2	2	2	2	2	2	2	2	2
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate (V/µs)	0.11	0.11	2	2	2	3.5	3.5	1.6	1.6	1.6	0.08
Gain Bandwidth Product (kHz)	350	350	1500	1500	1500	4000	4000	1400	1400	1400	150
Current - Input Bias (pA)	0.04	0.04	1	1	1	0.2	0.2	1	1	1	0.1
Voltage - Input Offset (mV)	1	1	0.003	0.003	0.003	0.6	0.6	15	15	15	1
Current - Supply (µA x2 Ch)	86	86	1250	1250	1250	1150	1150	1000	1000	1000	1
Current - Output / Channel (mA)	40	40	37	37	37	140	140	N/A	N/A	N/A	0.6
Voltage - Supply Span Min (V)	4.75	4.75	5	5	5	5	5	2	2	2	2.5
Voltage - Supply Span Max (V)	15.5	15.5	16	16	16	16	16	16	16	16	10
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	0 to 70	0 to 70	-40 to 85	0 to 70
Output Type	Standard	Standard	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Product Status	Obsolete	Last Time Buy	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Packaging & Compliance Upgrade):

LMC6022IM/NOPB is the direct equivalent of LMC6022IM with identical electrical specifications. This part maintains the same CMOS amplifier type, dual-channel configuration, and 8-SOIC package. The primary advantage is ROHS3 compliance and Last Time Buy product status, providing a transition path from the obsolete LMC6022IM. This part is recommended for designs requiring exact electrical performance match with improved compliance posture.

CMOS Amplifier Substitutes (Functional Equivalence):

ICL7621DCSA+, ICL7621DCSA+T, and ICL7621DESA+ are CMOS amplifiers manufactured by Analog Devices Inc./Maxim Integrated with active product status. These parts maintain the dual-channel, 8-SOIC package configuration and CMOS amplifier type. The ICL7621 series operates across a wider supply voltage range (2V to 16V) compared to the LMC6022IM (4.75V to 15.5V), providing greater design flexibility. Slew rate of 1.6V/µs and gain bandwidth product of 1.4 MHz exceed the LMC6022IM specifications. Input bias current of 1 pA is higher than the LMC6022IM but remains in the ultra-low leakage category. ICL7621DCSA+T offers tape and reel packaging with highest inventory availability (27,559 pcs). ICL7621DESA+ supports the full -40°C to 85°C temperature range matching the main part. All ICL7621 variants are ROHS3 compliant with active product status.

Chopper (Zero-Drift) Amplifier Substitutes (Enhanced Precision):

AD8639WARZ, AD8639WARZ-R7, and AD8639WARZ-RL are Chopper (Zero-Drift) amplifiers from Analog Devices Inc. with active product status. These parts feature rail-to-rail output capability and significantly enhanced precision characteristics: input offset voltage of 3 µV (versus 1 mV for LMC6022IM) and input bias current of 1 pA. Slew rate of 2V/µs and gain bandwidth product of 1.5 MHz provide improved dynamic performance. Operating temperature range extends to 125°C. Supply voltage range of 5V to 16V is compatible with LMC6022IM applications above 5V. These parts are suitable for applications requiring lower offset voltage and higher precision signal conditioning. All AD8639 variants are ROHS3 compliant with active product status.

General Purpose Amplifier Substitutes (Broadest Performance):

AD8666WARZ-R7 and AD8666WARZ-RL are General Purpose amplifiers from Analog Devices Inc. with active product status and rail-to-rail output. These parts deliver the highest slew rate (3.5V/µs) and gain bandwidth product (4 MHz) among all substitutes, with maximum output current per channel of 140 mA. Input bias current of 0.2 pA and input offset voltage of 600 µV provide good precision. Operating temperature range extends to 125°C. These parts are suitable for applications requiring higher bandwidth and output drive capability. Both variants are ROHS3 compliant with active product status.

MAX417CSA+ is a General Purpose amplifier from Analog Devices Inc./Maxim Integrated with active product status. This part features ultra-low supply current of 1 µA (x2 channels) and minimal output current of 600 µA per channel, making it suitable for battery-powered and low-power applications. However, the supply voltage range maximum of 10V limits compatibility with higher voltage designs. Slew rate of 0.08V/µs and gain bandwidth product of 150 kHz are lower than the LMC6022IM, restricting use to low-frequency applications. Operating temperature range is 0°C to 70°C, which does not cover the full -40°C specification of the main part.

Compliance and Lifecycle Considerations:

All active substitute parts are ROHS3 compliant, supporting modern procurement and environmental requirements. The LMC6022IM obsolete status necessitates migration to active alternatives. LMC6022IM/NOPB provides the shortest transition path with identical specifications. ICL7621 series offers CMOS equivalence with extended supply range. AD8639 series provides enhanced precision for demanding applications. AD8666 series delivers maximum performance for high-bandwidth requirements.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LMC6022IM with LMC6022IM/NOPB without circuit modifications?

A: Yes. LMC6022IM/NOPB is electrically and mechanically identical to LMC6022IM. Both use the 8-SOIC package and share identical electrical specifications including slew rate, gain bandwidth product, input bias current, and supply voltage range. The primary difference is packaging format (tube vs. NOPB designation) and improved RoHS compliance. No circuit modifications are required.

Q: What is the key difference between CMOS amplifier substitutes and Chopper (Zero-Drift) substitutes?

A: CMOS amplifiers (ICL7621 series) maintain the same amplifier architecture as the LMC6022IM with comparable slew rate and bandwidth characteristics. Chopper (Zero-Drift) amplifiers (AD8639 series) use a different internal architecture that dramatically reduces input offset voltage from 1 mV to 3 µV through continuous auto-zeroing. This enhanced precision comes at the cost of higher supply current (1.25 mA vs. 86 µA). Select Chopper amplifiers for precision signal conditioning; select CMOS amplifiers for direct functional replacement.

Q: Are all substitute parts available in 8-SOIC package?

A: Yes. All substitute parts listed are available in 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring PCB layout compatibility without redesign. Packaging variants (tube, tape & reel) differ by supplier format but maintain identical pinout and package dimensions.

Q: Which substitute part has the best inventory availability?

A: ICL7621DCSA+T offers the highest inventory with 27,559 pcs in stock. This tape & reel packaged CMOS amplifier provides both functional equivalence to LMC6022IM and immediate procurement availability.

Q: Can I use MAX417CSA+ as a substitute for LMC6022IM?

A: MAX417CSA+ is not recommended as a direct substitute. While it shares the 8-SOIC package and dual-channel configuration, the maximum supply voltage of 10V does not cover the full 4.75V to 15.5V range of LMC6022IM. Additionally, the slew rate of 0.08V/µs and gain bandwidth product of 150 kHz are lower than LMC6022IM specifications. Operating temperature range of 0°C to 70°C does not extend to -40°C. Use MAX417CSA+ only for low-power, low-frequency applications within its specified voltage and temperature limits.

Q: What is the advantage of AD8666 series over AD8639 series?

A: AD8666 series (General Purpose amplifiers) provides higher slew rate (3.5V/µs vs. 2V/µs) and gain bandwidth product (4 MHz vs. 1.5 MHz), with maximum output current of 140 mA per channel versus 37 mA for AD8639. AD8666 is suitable for higher-bandwidth and higher-drive applications. AD8639 (Chopper Zero-Drift) provides superior precision with input offset voltage of 3 µV versus 600 µV for AD8666. Select AD8666 for bandwidth-critical applications; select AD8639 for precision-critical applications.

Q: Do all substitute parts support the full -40°C to 85°C operating temperature range of LMC6022IM?

A: No. ICL7621DCSA+ and ICL7621DCSA+T support only 0°C to 70°C. ICL7621DESA+ supports -40°C to 85°C. AD8639 and AD8666 series support -40°C to 125°C. MAX417CSA+ supports only 0°C to 70°C. For applications requiring full -40°C to 85°C operation, use ICL7621DESA+, AD8639 series, or AD8666 series.

Q: What is the significance of RoHS compliance for these parts?

A: LMC6022IM is RoHS non-compliant, reflecting its obsolete status. All substitute parts are ROHS3 compliant, meeting current environmental and procurement regulations. RoHS3 compliance is mandatory for new designs and production continuity in regulated markets. This compliance status supports long-term supply chain viability and regulatory acceptance.

Q: Can I use ICL7621DCSA+ in a 2V supply application?

A: Yes. ICL7621DCSA+ supports supply voltage range of 2V to 16V, enabling operation at 2V where LMC6022IM requires minimum 4.75V. This extended low-voltage capability makes ICL7621 series suitable for battery-powered and low-voltage applications not supported by LMC6022IM.

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