AD8694WARUZ Equivalent & Substitute Parts

Part Overview

The AD8694WARUZ is a general-purpose operational amplifier manufactured by Analog Devices Inc., featuring four independent circuits in a 14-TSSOP surface-mount package. This rail-to-rail output amplifier operates across a 2.7 V to 6 V supply range with a gain-bandwidth product of 10 MHz and slew rate of 5 V/µs. The device is classified as Active product status and maintains full RoHS3 compliance with unlimited moisture sensitivity rating (MSL 1).

Substitute components are necessary when the AD8694WARUZ becomes unavailable, when alternative packaging formats are required for specific board layouts, or when application requirements demand different electrical characteristics such as higher bandwidth, lower power consumption, or extended supply voltage ranges.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Output Type	Rail-to-Rail	—
Gain Bandwidth Product	10	MHz
Slew Rate	5	V/µs
Voltage Supply Span (Min)	2.7	V
Voltage Supply Span (Max)	6	V
Current - Input Bias	1	pA
Voltage - Input Offset	400	µV
Current - Supply (Total)	950	µA
Current - Output / Channel	80	mA
Operating Temperature Range	-40 to 125	°C
Package / Case	14-TSSOP	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the AD8694WARUZ are evaluated based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

Amplifier Type (General Purpose vs. Instrumentation)
Number of Circuits (quad configuration with 4 independent amplifiers)
Output Type (Rail-to-Rail capability)
Package / Case (14-TSSOP form factor)
Voltage Supply Span compatibility (minimum 2.7 V, maximum 6 V overlap)
Operating Temperature Range (minimum -40°C coverage)

Secondary Performance Parameters:

Gain Bandwidth Product (10 MHz baseline)
Slew Rate (5 V/µs baseline)
Input Bias Current (1 pA baseline)
Input Offset Voltage (400 µV baseline)
Supply Current (950 µA baseline)
Output Current per Channel (80 mA baseline)

Substitute parts are grouped into two categories:

Category A: Direct Package & Circuit Count Equivalents — Parts maintaining 14-TSSOP packaging with 4 general-purpose circuits and rail-to-rail output. These parts offer the closest form-factor compatibility and are preferred for direct board-level replacement.

Category B: Alternative Package Configurations — Parts with different package types (8-SOIC, 8-SO) or reduced circuit counts (1 or 2 circuits). These require circuit redesign or multiple components to achieve equivalent functionality but may be selected when specific performance characteristics or supply availability necessitate deviation from the primary package format.

Parameter Comparison

Parameter	AD8694WARUZ	LMV654MTX/NOPB	LMV654MT/NOPB	LMV824AIPT	LMV824AIYPT	LMV324Q1MTX/NOPB	LMV324Q3MT/NOPB
Manufacturer	Analog Devices	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	Texas Instruments	Texas Instruments
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	4	4	4	4	4	4	4
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP
Gain Bandwidth Product (MHz)	10	12	12	5.5	5.5	1	1
Slew Rate (V/µs)	5	3	3	1.9	1.9	1	1
Voltage Supply Span Min (V)	2.7	2.7	2.7	2.5	2.5	2.7	2.7
Voltage Supply Span Max (V)	6	5.5	5.5	5.5	5.5	5.5	5.5
Current - Input Bias (nA)	0.001	0.08	0.08	60	60	15	15
Voltage - Input Offset (µV)	400	100	100	800	800	1700	1700
Current - Supply Total (µA)	950	122	122	300	300	410	410
Current - Output / Channel (mA)	80	25	25	70	70	160	160
Operating Temperature Range (°C)	-40 to 125	-40 to 125	-40 to 85	-40 to 125	-40 to 125	-40 to 125	-40 to 85
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	—	—	—	AEC-Q100	AEC-Q100	AEC-Q100	AEC-Q100

Engineering Selection Recommendations

Direct Substitutes (14-TSSOP, 4-Circuit, Rail-to-Rail Configuration):

The LMV654MTX/NOPB and LMV654MT/NOPB from Texas Instruments provide the closest electrical and mechanical compatibility with the AD8694WARUZ. Both maintain identical package geometry (14-TSSOP), circuit count (4), and output type (rail-to-rail). The LMV654MTX/NOPB variant is supplied in Tape & Reel packaging, while LMV654MT/NOPB is supplied in Bulk. These parts feature higher gain-bandwidth product (12 MHz vs. 10 MHz) and lower supply current (122 µA vs. 950 µA), making them suitable for applications where power efficiency is beneficial. The LMV654MTX/NOPB maintains the full -40°C to 125°C operating temperature range of the AD8694WARUZ.

The LMV824AIPT and LMV824AIYPT from STMicroelectronics are automotive-qualified alternatives (AEC-Q100) with identical package and circuit configuration. These parts operate across -40°C to 125°C and feature lower supply current (300 µA) compared to the AD8694WARUZ. Both variants are suitable for applications requiring automotive-grade components.

The LMV324Q1MTX/NOPB from Texas Instruments is an automotive-qualified option (AEC-Q100) maintaining the 14-TSSOP package and 4-circuit configuration. This part operates across -40°C to 125°C and provides higher output current per channel (160 mA vs. 80 mA), beneficial for applications requiring increased drive capability.

Alternative Configuration Substitutes:

The LMV324Q3MT/NOPB is functionally equivalent to LMV324Q1MTX/NOPB but operates across -40°C to 85°C, limiting its use to applications not requiring the extended upper temperature range.

Compliance Status:

All substitute parts listed maintain RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring compatibility with standard manufacturing and storage requirements. Automotive-qualified variants (LMV824AIPT, LMV824AIYPT, LMV324Q1MTX/NOPB, LMV324Q3MT/NOPB) carry AEC-Q100 qualification for applications requiring automotive-grade reliability.

Frequently Asked Questions (FAQ)

Q: Can the LMV654MTX/NOPB directly replace the AD8694WARUZ on an existing PCB?

A: Yes. Both parts share identical 14-TSSOP package geometry, pinout compatibility as 4-circuit general-purpose amplifiers with rail-to-rail output, and overlapping supply voltage ranges (2.7 V to 5.5 V). The LMV654MTX/NOPB operates within the same temperature range (-40°C to 125°C) and maintains RoHS3 compliance. No PCB modifications are required for direct substitution.

Q: What is the primary difference between LMV654MTX/NOPB and LMV654MT/NOPB?

A: The packaging format differs. LMV654MTX/NOPB is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. LMV654MT/NOPB is supplied in Bulk format. Both parts are electrically identical and maintain the same 14-TSSOP package case.

Q: Are the LMV824AIPT and LMV824AIYPT interchangeable?

A: Yes. Both parts are electrically identical STMicroelectronics components with identical electrical specifications, package type (14-TSSOP), and operating temperature range (-40°C to 125°C). The difference lies in packaging designation only.

Q: Why do some substitute parts have lower supply current than the AD8694WARUZ?

A: Supply current variation reflects different internal circuit design and optimization approaches by different manufacturers. Lower supply current (such as 122 µA in LMV654 variants vs. 950 µA in AD8694WARUZ) indicates more efficient power consumption, which may be advantageous in battery-powered or power-constrained applications. The choice depends on application requirements.

Q: Can I use LMV324Q1MTX/NOPB as a substitute if my application requires automotive qualification?

A: Yes. The LMV324Q1MTX/NOPB carries AEC-Q100 automotive qualification and maintains the 14-TSSOP package with 4 general-purpose rail-to-rail circuits. It operates across -40°C to 125°C and provides higher output current per channel (160 mA) compared to the AD8694WARUZ (80 mA).

Q: What is the significance of the -40°C to 85°C temperature range limitation in LMV324Q3MT/NOPB?

A: The LMV324Q3MT/NOPB operates only to 85°C maximum, compared to 125°C for the AD8694WARUZ and most substitute options. This part is unsuitable for applications requiring operation at temperatures above 85°C. Applications with extended temperature requirements should select alternatives with -40°C to 125°C ratings.

Q: Are all listed substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring compatibility with standard manufacturing processes and storage requirements equivalent to the AD8694WARUZ.

Q: How does the gain-bandwidth product difference affect substitution suitability?

A: The AD8694WARUZ features 10 MHz gain-bandwidth product. Substitute parts with higher bandwidth (LMV654 variants at 12 MHz) support faster signal processing and are suitable for applications requiring increased frequency response. Substitutes with lower bandwidth (LMV824 variants at 5.5 MHz, LMV324 variants at 1 MHz) are suitable only for applications with lower frequency requirements. Bandwidth selection depends on specific circuit application demands.

Q: What packaging options are available for the substitute parts?

A: All substitute parts maintain the 14-TSSOP surface-mount package case identical to the AD8694WARUZ. Packaging format variations (Tape & Reel vs. Bulk) affect supply and handling but do not change the component's physical footprint or electrical characteristics.

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