ALD1731ASAL Equivalent & Substitute Parts

Part Overview

The ALD1731ASAL is a general-purpose operational amplifier manufactured by Advanced Linear Devices Inc., configured as a single-circuit rail-to-rail amplifier in an 8-SOIC surface mount package. This component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. The ALD1731ASAL operates across a 2V to 10V supply span with a slew rate of 0.7V/µs and gain bandwidth product of 700 kHz, making it suitable for low-speed analog signal conditioning applications. Equivalent and substitute parts are identified based on matching package type, output configuration, circuit count, and compatible electrical operating parameters to ensure direct functional replacement in circuit designs.

Key Parameters

Parameter	ALD1731ASAL
Manufacturer	Advanced Linear Devices Inc.
Amplifier Type	General Purpose
Number of Circuits	1
Output Type	Rail-to-Rail
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	0.7V/µs
Gain Bandwidth Product	700 kHz
Current - Input Bias	10 pA
Voltage - Input Offset	400 µV
Voltage - Supply Span (Min)	2 V
Voltage - Supply Span (Max)	10 V
Operating Temperature	0°C ~ 70°C
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the ALD1731ASAL are selected based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

Package type: 8-SOIC surface mount configuration
Output configuration: Rail-to-rail output capability
Circuit count: Single amplifier circuit
Supply voltage range: Minimum 2V to 10V operation
Mounting type: Surface mount

Substitution Logic:

The substitute parts are grouped into two functional categories based on amplifier type and electrical performance characteristics:

Instrumentation Amplifier Category (AD623ARZ-R7): Differs in amplifier topology but maintains 8-SOIC package, rail-to-rail output, single circuit configuration, and surface mount compatibility. Supply span extends to 12V maximum. Input offset voltage is significantly lower at 25 µV compared to 400 µV of the main part.
Voltage Feedback Amplifier Category (AD8031 and AD8051 series): Maintains 8-SOIC package, rail-to-rail output, single circuit configuration, and surface mount compatibility. These parts feature higher slew rates (35V/µs to 170V/µs) and wider bandwidth characteristics compared to the general-purpose ALD1731ASAL. Supply span extends to 12V maximum.

All substitute parts maintain RoHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and Active product status. Package dimensions remain consistent at 8-SOIC (0.154", 3.90mm Width).

Parameter Comparison

Parameter	ALD1731ASAL	AD623ARZ-R7	AD8031ARZ	AD8031ARZ-REEL7	AD8051ARZ	AD8091ARZ
Manufacturer	Advanced Linear Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	General Purpose	Instrumentation	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback
Number of Circuits	1	1	1	1	1	1
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate	0.7V/µs	0.3V/µs	35V/µs	35V/µs	170V/µs	170V/µs
Current - Input Bias	10 pA	17 nA	450 nA	450 nA	1.4 µA	1.4 µA
Voltage - Input Offset	400 µV	25 µV	1 mV	1 mV	1.8 mV	1.8 mV
Voltage - Supply Span (Min)	2 V	2.7 V	2.7 V	2.7 V	3 V	3 V
Voltage - Supply Span (Max)	10 V	12 V	12 V	12 V	12 V	12 V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Packaging Considerations:

All substitute parts maintain identical 8-SOIC surface mount package dimensions (0.154", 3.90mm Width), ensuring direct PCB footprint compatibility with the ALD1731ASAL. Packaging variants include Tube, Cut Tape (CT) & Digi-Reel®, and Tape & Reel (TR) options across the substitute part lineup.

Compliance and Certification:

All substitute parts listed maintain Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1), matching the regulatory and environmental compliance profile of the ALD1731ASAL. REACH status is unaffected for all parts, and ECCN classification remains EAR99 across the entire substitute group.

Supply Voltage Compatibility:

The ALD1731ASAL operates within a 2V to 10V supply span. Substitute parts AD623ARZ-R7, AD8031 series, and AD8051 series extend the maximum supply voltage to 12V, providing additional operational flexibility. Minimum supply voltage requirements range from 2.7V to 3V for substitute parts, which remains compatible with applications designed for the 2V minimum of the main part when operating above the substitute minimum threshold.

Operating Temperature Range:

The ALD1731ASAL specifies 0°C to 70°C operation. Substitute parts extend the operating temperature range to -40°C to 85°C (AD623ARZ-R7, AD8031 series, AD8091ARZ) or -40°C to 125°C (AD8051 series), providing broader environmental operating capability for applications requiring extended temperature performance.

Electrical Performance Trade-offs:

Selection between substitute parts depends on application-specific performance requirements. The AD623ARZ-R7 instrumentation amplifier offers significantly lower input offset voltage (25 µV) compared to the ALD1731ASAL (400 µV), suitable for precision measurement applications. The AD8031 series provides 35V/µs slew rate and 80 MHz bandwidth, representing moderate performance enhancement. The AD8051 and AD8091 series deliver 170V/µs slew rate and 110 MHz bandwidth, suitable for higher-speed signal processing applications.

Frequently Asked Questions (FAQ)

Q: Can the AD623ARZ-R7 directly replace the ALD1731ASAL in all applications?

A: The AD623ARZ-R7 maintains identical 8-SOIC package, rail-to-rail output, single circuit configuration, and surface mount compatibility. However, the AD623ARZ-R7 is an instrumentation amplifier topology, whereas the ALD1731ASAL is a general-purpose amplifier. Circuit design differences exist between these topologies. The AD623ARZ-R7 features lower input offset voltage (25 µV vs. 400 µV) and lower slew rate (0.3V/µs vs. 0.7V/µs). Application-specific circuit validation is required to confirm functional equivalence.

Q: What is the primary difference between the AD8031 and AD8051 substitute options?

A: Both the AD8031 and AD8051 series are voltage feedback amplifiers in 8-SOIC packages with rail-to-rail output. The AD8051 series provides significantly higher performance: slew rate of 170V/µs compared to 35V/µs for AD8031, and -3dB bandwidth of 110 MHz compared to 80 MHz for AD8031. The AD8051 also supports extended operating temperature to 125°C. Selection depends on whether the application requires the higher speed and bandwidth characteristics of the AD8051.

Q: Are all substitute parts available in the same packaging options as the ALD1731ASAL?

A: The ALD1731ASAL is supplied in Tube packaging. Substitute parts are available in multiple packaging formats: Tube, Cut Tape (CT) & Digi-Reel®, and Tape & Reel (TR). The 8-SOIC package dimensions remain consistent across all variants. Packaging selection should align with manufacturing assembly requirements and inventory management practices.

Q: What supply voltage range applies when substituting parts?

A: The ALD1731ASAL operates from 2V to 10V. Substitute parts operate from 2.7V to 12V (AD623ARZ-R7, AD8031 series) or 3V to 12V (AD8051, AD8091 series). When substituting, the application supply voltage must fall within the overlap range of both the original and substitute part specifications. For applications operating at 2V to 2.7V, only the ALD1731ASAL is suitable.

Q: Do all substitute parts maintain the same RoHS and environmental compliance as the ALD1731ASAL?

A: Yes. All substitute parts listed maintain RoHS3 compliance, unlimited moisture sensitivity rating (MSL 1), REACH unaffected status, and EAR99 ECCN classification, matching the regulatory profile of the ALD1731ASAL.

Q: Which substitute part offers the lowest input offset voltage?

A: The AD623ARZ-R7 instrumentation amplifier offers the lowest input offset voltage at 25 µV, compared to 400 µV for the ALD1731ASAL. This characteristic makes the AD623ARZ-R7 suitable for precision analog applications requiring minimal DC offset errors.

Q: Can substitute parts with higher slew rates be used in applications designed for the ALD1731ASAL?

A: Substitute parts with higher slew rates (AD8031 series at 35V/µs, AD8051 and AD8091 series at 170V/µs) can be used in applications designed for the ALD1731ASAL (0.7V/µs) from a slew rate capability perspective. However, higher slew rate amplifiers may introduce increased noise and require circuit design adjustments to prevent instability. Application-specific circuit analysis is necessary to confirm compatibility.

Q: What inventory levels are available for substitute parts?

A: Inventory availability varies across substitute parts. AD8031ARZ-REEL7 offers the highest inventory at 24,058 pieces. AD623ARZ-R7 provides 18,200 pieces. AD8051ARZ-REEL7 offers 7,104 pieces. Specific packaging variants and manufacturers should be confirmed with current inventory status before component procurement.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message