ADA4666-2ACPZ-RL Equivalent & Substitute Parts

Part Overview

The ADA4666-2ACPZ-RL is a CMOS dual-channel operational amplifier manufactured by Analog Devices Inc., housed in an 8-LFCSP-WD (3x3) surface mount package. This linear amplifier features rail-to-rail output capability with a 4 MHz gain bandwidth product and operates across a 3V to 18V supply range. The device is classified as Active product status and is RoHS3 compliant. Substitute parts are identified to address packaging format requirements, inventory availability, or specific application constraints while maintaining functional compatibility within defined electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Gain Bandwidth Product	4	MHz
Slew Rate	2	V/µs
Voltage Supply Span (Min)	3	V
Voltage Supply Span (Max)	18	V
Current - Output / Channel	220	mA
Operating Temperature Range	-40 to 125	°C
Package / Case	8-WFDFN Exposed Pad, CSP	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the ADA4666-2ACPZ-RL are categorized based on the following substitution criteria:

Parametric Equivalent: Parts that maintain identical electrical specifications across all critical parameters including amplifier type, number of circuits, output type, gain bandwidth product, slew rate, supply voltage range, output current capability, and operating temperature range. These parts differ only in packaging format (Cut Tape & Digi-Reel versus Tape & Reel).

Functional Alternatives: Parts that share the same package footprint, mounting type, and dual-channel rail-to-rail output configuration but operate with different electrical characteristics. These alternatives are suitable for applications where the primary design constraints are physical compatibility and basic functional requirements rather than specific performance metrics.

Key Parameters for Substitution Assessment:

Amplifier Type (CMOS vs. General Purpose)
Number of Circuits (2 channels)
Output Type (Rail-to-Rail)
Gain Bandwidth Product (MHz range)
Slew Rate (V/µs)
Supply Voltage Range (minimum and maximum)
Output Current per Channel (mA)
Operating Temperature Range (°C)
Package / Case format
Surface Mount compatibility

Parameter Comparison

Parameter	ADA4666-2ACPZ-RL	ADA4666-2ACPZ-R7	LT6004IDD#TRPBF	LT6004IDD#PBF	LT6004CDD#PBF
Manufacturer	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	CMOS	CMOS	General Purpose	General Purpose	General Purpose
Number of Circuits	2	2	2	2	2
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Gain Bandwidth Product	4 MHz	4 MHz	3 kHz	3 kHz	3 kHz
Slew Rate	2 V/µs	2 V/µs	0.0055 V/µs	0.0055 V/µs	0.0055 V/µs
Voltage - Supply Span (Min)	3 V	3 V	1.6 V	1.6 V	1.6 V
Voltage - Supply Span (Max)	18 V	18 V	16 V	16 V	16 V
Current - Output / Channel	220 mA	220 mA	9 mA	9 mA	9 mA
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 85°C	-40°C to 85°C	0°C to 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-WFDFN Exposed Pad, CSP	8-WFDFN Exposed Pad, CSP	8-WFDFN Exposed Pad	8-WFDFN Exposed Pad	8-WFDFN Exposed Pad
Packaging Format	Tape & Reel (TR)	Cut Tape & Digi-Reel	Tape & Reel (TR)	Tube	Tube
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

ADA4666-2ACPZ-R7: This part is a parametric equivalent to the ADA4666-2ACPZ-RL, maintaining identical electrical specifications and operating characteristics. The sole distinction is the packaging format: ADA4666-2ACPZ-R7 is supplied in Cut Tape & Digi-Reel format, whereas the primary part is supplied in Tape & Reel format. Both parts are Active status, RoHS3 compliant, and suitable for applications requiring the full performance envelope of the ADA4666 series. Selection between these two variants depends on procurement and assembly line requirements.

LT6004IDD#TRPBF: This part shares the same 8-WFDFN Exposed Pad package footprint and dual-channel rail-to-rail output configuration. However, it operates as a General Purpose amplifier with significantly different electrical characteristics: 3 kHz gain bandwidth product versus 4 MHz, 0.0055 V/µs slew rate versus 2 V/µs, and 9 mA output current per channel versus 220 mA. The LT6004IDD#TRPBF is supplied in Tape & Reel format and is Active status with RoHS3 compliance. This part is suitable only for low-frequency, low-power applications where the reduced performance specifications are acceptable.

LT6004IDD#PBF: Functionally identical to LT6004IDD#TRPBF with the same electrical specifications and General Purpose amplifier classification. The difference is packaging format: LT6004IDD#PBF is supplied in Tube format. Operating temperature range extends to -40°C to 85°C. This part is Active status and RoHS3 compliant.

LT6004CDD#PBF: This variant is also a General Purpose dual-channel amplifier in 8-WFDFN Exposed Pad package with identical electrical specifications to the LT6004 series. Operating temperature range is restricted to 0°C to 85°C. Supplied in Tube format, Active status, and RoHS3 compliant. This part is suitable for commercial temperature range applications only.

Frequently Asked Questions (FAQ)

Q: Can the LT6004 series parts directly replace the ADA4666-2ACPZ-RL in all applications?

A: No. While both part families share the same package footprint and dual-channel rail-to-rail output configuration, the LT6004 series operates with significantly reduced performance specifications. The LT6004 has a gain bandwidth product of 3 kHz compared to 4 MHz for the ADA4666, and output current capability of 9 mA per channel versus 220 mA. The LT6004 is suitable only for low-frequency, low-power signal conditioning applications. Applications requiring high-speed operation or high output current must use the ADA4666 series.

Q: What is the difference between ADA4666-2ACPZ-RL and ADA4666-2ACPZ-R7?

A: These parts are parametric equivalents with identical electrical specifications and performance characteristics. The only difference is packaging format: ADA4666-2ACPZ-RL is supplied in Tape & Reel (TR) format, while ADA4666-2ACPZ-R7 is supplied in Cut Tape & Digi-Reel format. Selection depends on assembly line compatibility and procurement requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed—ADA4666-2ACPZ-RL, ADA4666-2ACPZ-R7, LT6004IDD#TRPBF, LT6004IDD#PBF, and LT6004CDD#PBF—are RoHS3 compliant and REACH unaffected.

Q: What is the operating temperature range difference between substitute parts?

A: The ADA4666-2ACPZ-RL and ADA4666-2ACPZ-R7 operate from -40°C to 125°C. The LT6004IDD#TRPBF and LT6004IDD#PBF operate from -40°C to 85°C. The LT6004CDD#PBF operates from 0°C to 85°C. Applications requiring operation above 85°C must use the ADA4666 series.

Q: Can I use LT6004CDD#PBF in a design that requires -40°C operation?

A: No. The LT6004CDD#PBF has a minimum operating temperature of 0°C and is not rated for operation below this temperature. For applications requiring -40°C operation, use ADA4666-2ACPZ-RL, ADA4666-2ACPZ-R7, LT6004IDD#TRPBF, or LT6004IDD#PBF.

Q: What is the maximum supply voltage for each part?

A: The ADA4666-2ACPZ-RL and ADA4666-2ACPZ-R7 support a maximum supply voltage of 18V. The LT6004 series (all variants) supports a maximum supply voltage of 16V. Applications requiring operation above 16V must use the ADA4666 series.

Q: Are the package dimensions identical between all substitute parts?

A: All parts use the 8-WFDFN Exposed Pad package with 3x3mm dimensions. The physical footprint is identical across all variants, ensuring PCB layout compatibility.

Q: What is the difference in output current capability?

A: The ADA4666-2ACPZ-RL and ADA4666-2ACPZ-R7 provide 220 mA output current per channel. The LT6004 series (all variants) provides 9 mA output current per channel. Applications requiring high output current must use the ADA4666 series.

Q: Which packaging formats are available for the ADA4666 series?

A: The ADA4666-2ACPZ-RL is available in Tape & Reel (TR) format. The ADA4666-2ACPZ-R7 is available in Cut Tape & Digi-Reel format. Both formats are suitable for automated assembly processes.

Q: Which packaging formats are available for the LT6004 series?

A: The LT6004IDD#TRPBF is available in Tape & Reel (TR) format. The LT6004IDD#PBF and LT6004CDD#PBF are available in Tube format. Tape & Reel format is preferred for high-volume automated assembly, while Tube format is suitable for lower-volume or manual assembly processes.

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