ADA4638-1ACPZ-RL Equivalent & Substitute Parts

Part Overview

The ADA4638-1ACPZ-RL is an Active product zero-drift operational amplifier manufactured by Analog Devices Inc. in the Linear Amplifiers category. This single-circuit, rail-to-rail output device is housed in an 8-LFCSP-WD (3x3) surface mount package and is designed for precision analog signal conditioning applications requiring minimal input offset voltage and low input bias current.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and compliance certifications are maintained across alternative packaging configurations or manufacturing revisions of the same base product series.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Zero-Drift	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	1.5	V/µs
Gain Bandwidth Product	1.5	MHz
-3dB Bandwidth	2.5	MHz
Current - Input Bias	45	pA
Voltage - Input Offset	0.5	µV
Current - Supply	850	µA
Current - Output / Channel	38	mA
Voltage - Supply Span (Min)	4.5	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	-40 to 125	°C
Package / Case	8-WFDFN Exposed Pad, CSP	—
Supplier Device Package	8-LFCSP-WD (3x3)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	3 (168 Hours)	—
REACH Status	REACH Unaffected	—

Substitute Part Grouping Explanation

Substitution of the ADA4638-1ACPZ-RL is determined by equivalence across the following critical parameters:

Electrical Performance Criteria:

Amplifier Type: Zero-Drift
Number of Circuits: 1
Output Type: Rail-to-Rail
Slew Rate: 1.5 V/µs
Gain Bandwidth Product: 1.5 MHz
-3dB Bandwidth: 2.5 MHz
Input Bias Current: 45 pA
Input Offset Voltage: 0.5 µV
Supply Current: 850 µA
Output Current per Channel: 38 mA
Supply Voltage Range: 4.5 V to 30 V
Operating Temperature Range: -40°C to 125°C

Mechanical Compatibility Criteria:

Package Type: 8-WFDFN Exposed Pad, CSP
Supplier Device Package: 8-LFCSP-WD (3x3)
Mounting Type: Surface Mount

Compliance & Certification Criteria:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 3 (168 Hours)
REACH Status: REACH Unaffected

Substitute parts maintain identical electrical specifications, package footprint, and regulatory compliance status. Differences in packaging configuration (Tape & Reel designation) do not affect functional or mechanical compatibility.

Parameter Comparison

Parameter	ADA4638-1ACPZ-RL	ADA4638-1ACPZ-R7	Match
Manufacturer	Analog Devices Inc.	Analog Devices Inc.	✓
Category	Linear, Amplifiers	Linear, Amplifiers	✓
Amplifier Type	Zero-Drift	Zero-Drift	✓
Number of Circuits	1	1	✓
Output Type	Rail-to-Rail	Rail-to-Rail	✓
Slew Rate (V/µs)	1.5	1.5	✓
Gain Bandwidth Product (MHz)	1.5	1.5	✓
-3dB Bandwidth (MHz)	2.5	2.5	✓
Current - Input Bias (pA)	45	45	✓
Voltage - Input Offset (µV)	0.5	0.5	✓
Current - Supply (µA)	850	850	✓
Current - Output / Channel (mA)	38	38	✓
Voltage - Supply Span Min (V)	4.5	4.5	✓
Voltage - Supply Span Max (V)	30	30	✓
Operating Temperature (°C)	-40 to 125	-40 to 125	✓
Package / Case	8-WFDFN Exposed Pad, CSP	8-WFDFN Exposed Pad, CSP	✓
Supplier Device Package	8-LFCSP-WD (3x3)	8-LFCSP-WD (3x3)	✓
Mounting Type	Surface Mount	Surface Mount	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	✓
REACH Status	REACH Unaffected	REACH Unaffected	✓
Product Status	Active	Active	✓

Engineering Selection Recommendations

Both the ADA4638-1ACPZ-RL and ADA4638-1ACPZ-R7 are Active products from Analog Devices Inc. with identical electrical performance specifications and mechanical package compatibility. Selection between these parts is based on supply chain availability and packaging configuration requirements.

ADA4638-1ACPZ-RL is suitable for applications requiring the RL packaging designation, with 836 pieces currently in stock.

ADA4638-1ACPZ-R7 is suitable for applications requiring the R7 packaging designation, with 2200 pieces currently in stock.

Both parts maintain ROHS3 compliance, REACH unaffected status, and identical MSL ratings. The choice between these substitutes does not affect circuit performance, thermal characteristics, or regulatory compliance. Selection should be based on procurement lead time, inventory availability, and internal supply chain specifications.

Frequently Asked Questions (FAQ)

Q: Are ADA4638-1ACPZ-RL and ADA4638-1ACPZ-R7 electrically identical?

A: Yes. Both parts share identical electrical specifications including slew rate, gain bandwidth product, input offset voltage, input bias current, supply current, and output current ratings. They operate across the same supply voltage range (4.5 V to 30 V) and temperature range (-40°C to 125°C).

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. Both parts use the identical 8-LFCSP-WD (3x3) surface mount package with 8-WFDFN Exposed Pad, CSP configuration. PCB footprints, solder pad layouts, and thermal characteristics are identical.

Q: What is the difference between the RL and R7 packaging designations?

A: The RL and R7 designations refer to different tape and reel configurations used for automated assembly and component handling. These designations do not affect the electrical performance, mechanical compatibility, or functional characteristics of the device.

Q: Are both parts RoHS compliant?

A: Yes. Both ADA4638-1ACPZ-RL and ADA4638-1ACPZ-R7 are ROHS3 compliant and REACH unaffected.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: Both parts have an MSL rating of 3 with a floor life of 168 hours. This indicates standard moisture sensitivity handling requirements for surface mount components.

Q: Which part should I select based on availability?

A: Selection should be based on your procurement requirements and supply chain specifications. ADA4638-1ACPZ-R7 currently has higher inventory availability (2200 pieces) compared to ADA4638-1ACPZ-RL (836 pieces). Both parts are Active products with no planned discontinuation.

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