ALD2302ASAL Equivalent & Substitute Parts

Part Overview

The ALD2302ASAL is a dual-channel general-purpose comparator manufactured by Advanced Linear Devices Inc., housed in an 8-SOIC surface-mount package. This active component operates across supply voltages of 4V to 10V (single supply) or ±2V to ±5V (dual supply), with output configurations supporting CMOS, NMOS, push-pull, and TTL logic levels. The device is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts become necessary when the original ALD2302ASAL is unavailable, when alternative packaging formats are required for manufacturing constraints, or when extended operating temperature ranges or enhanced electrical performance characteristics are needed for specific application requirements.

Key Parameters

Parameter	ALD2302ASAL Value
Number of Elements	2
Output Type	CMOS, NMOS, Push-Pull, TTL
Voltage - Supply, Single/Dual (±)	4V ~ 10V, ±2V ~ 5V
Voltage - Input Offset (Max)	1mV @ 5V
Current - Input Bias (Max)	0.001µA @ 5V
Current - Output (Typ)	60mA
Current - Quiescent (Max)	500µA
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ALD2302ASAL is determined by the following criteria:

Primary Compatibility Requirements:

Dual-channel comparator architecture (2 elements minimum)
Output type compatibility: Must support at least push-pull or rail-to-rail configurations
Supply voltage range: Must encompass or overlap with 4V ~ 10V single supply or ±2V ~ ±5V dual supply
Input offset voltage: Maximum 5mV @ rated voltage
Input bias current: Maximum 1pA or lower
Quiescent current: Maximum 500µA
Operating temperature: Minimum 0°C to 70°C coverage
Surface-mount package format
ROHS3 compliance and MSL 1 rating

Secondary Considerations:

Package form factor (8-SOIC, 8-SOP, TSOT-23-8, 8-DFN acceptable)
Propagation delay and hysteresis characteristics (when specified)
Output current capability (minimum 50mA typical)

Substitute parts are grouped by packaging format and electrical performance tier to facilitate direct replacement or design-level substitution.

Parameter Comparison

Part Number	Manufacturer	Package	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Quiescent Current (Max)	Operating Temp	Output Type
ALD2302ASAL	Advanced Linear Devices Inc.	8-SOIC	4V ~ 10V, ±2V ~ 5V	1mV @ 5V	0.001µA @ 5V	500µA	0°C ~ 70°C	CMOS, NMOS, Push-Pull, TTL
MAX9022ASA+	Analog Devices Inc./Maxim	8-SOIC	2.5V ~ 5.5V, ±1.25V ~ 2.75V	1mV @ 5V	0.003µA @ 5V	5µA	-40°C ~ 125°C	CMOS, Rail-to-Rail, TTL
MAX9022ASA+T	Analog Devices Inc./Maxim	8-SOIC	2.5V ~ 5.5V, ±1.25V ~ 2.75V	1mV @ 5V	0.003µA @ 5V	5µA	-40°C ~ 125°C	CMOS, Rail-to-Rail, TTL
MAX9032ASA+	Analog Devices Inc./Maxim	8-SOIC	2.5V ~ 5.5V	1mV @ 5V	0.008µA @ 5V	55µA	-40°C ~ 125°C	Push-Pull, Rail-to-Rail
MAX9032ASA+T	Analog Devices Inc./Maxim	8-SOIC	2.5V ~ 5.5V	1mV @ 5V	0.008µA @ 5V	55µA	-40°C ~ 125°C	Push-Pull, Rail-to-Rail
MAX989ESA+	Analog Devices Inc./Maxim	8-SOIC	2.5V ~ 5.5V, ±1.25V ~ 2.75V	5mV @ 5.5V	1pA @ 5.5V	24µA	-40°C ~ 85°C	CMOS, Push-Pull, Rail-to-Rail, TTL
MAX976EUA+	Analog Devices Inc./Maxim	8-uMAX/uSOP	2.7V ~ 5.5V	2mV @ 5V	0.075µA @ 5.5V	650µA	-40°C ~ 85°C	Push-Pull, Rail-to-Rail
BU7232F-E2	Rohm Semiconductor	8-SOP	1.8V ~ 5.5V, ±0.9V ~ 2.75V	11mV @ 3V	1pA @ 3V	25µA	-40°C ~ 85°C	Push-Pull
LTC6702CTS8#TRMPBF	Analog Devices Inc.	TSOT-23-8	1.7V ~ 5.5V	4.6mV @ 3V	—	32µA	0°C ~ 70°C	CMOS, Push-Pull, Rail-to-Rail, TTL
LTC6702HDC#TRPBF	Analog Devices Inc.	8-DFN (2x2)	1.7V ~ 5.5V	4.6mV @ 3V	—	32µA	-40°C ~ 125°C	CMOS, Push-Pull, Rail-to-Rail, TTL
MAX9017BEKA+T	Analog Devices Inc./Maxim	SOT-23-8	1.8V ~ 5.5V	5mV @ 5V	0.001µA @ 5V	2.8µA	-40°C ~ 85°C	CMOS, Push-Pull, Rail-to-Rail

Engineering Selection Recommendations

8-SOIC Package Direct Replacements (Same Footprint):

MAX9022ASA+ and MAX9022ASA+T are functionally equivalent to ALD2302ASAL within the 8-SOIC package format. Both devices maintain identical input offset voltage (1mV @ 5V) and support overlapping supply voltage ranges. The MAX9022 series offers extended operating temperature range (-40°C to 125°C) and significantly reduced quiescent current (5µA versus 500µA), making them suitable for direct PCB substitution. Both are ROHS3 compliant with MSL 1 rating.

MAX9032ASA+ and MAX9032ASA+T provide push-pull and rail-to-rail output configurations in 8-SOIC packaging. These devices maintain 1mV input offset voltage specification and operate across -40°C to 125°C, offering superior temperature performance. Quiescent current is 55µA, representing a 90% reduction from the original part.

MAX989ESA+ operates within 2.5V to 5.5V supply range with dual supply capability (±1.25V to ±2.75V). Input offset voltage is specified at 5mV maximum, and quiescent current is 24µA. This device supports CMOS, push-pull, rail-to-rail, and TTL output configurations, matching the original part's output flexibility.

Alternative Package Formats:

LTC6702CTS8#TRMPBF (TSOT-23-8) and LTC6702HDC#TRPBF (8-DFN) provide space-optimized packaging alternatives. Both maintain the same dual-comparator architecture and support 1.7V to 5.5V supply range. The TSOT-23-8 variant operates 0°C to 70°C (matching original temperature range), while the 8-DFN variant extends to -40°C to 125°C. Input offset voltage is 4.6mV, and quiescent current is 32µA. These packages are suitable for designs requiring reduced board footprint.

MAX976EUA+ in 8-uMAX/uSOP packaging offers the most compact form factor with push-pull and rail-to-rail outputs. Supply range is 2.7V to 5.5V, input offset is 2mV, and operating temperature extends to -40°C to 85°C. Quiescent current is 650µA.

BU7232F-E2 (8-SOP, Rohm Semiconductor) provides push-pull output configuration with 1.8V to 5.5V supply range. Input offset voltage is 11mV, representing a trade-off in precision. Operating temperature range is -40°C to 85°C.

MAX9017BEKA+T (SOT-23-8) is a comparator with integrated voltage reference, featuring ultra-low quiescent current (2.8µA) and extended temperature range (-40°C to 85°C). This device is suitable for applications requiring reference voltage integration.

All substitute parts maintain ROHS3 compliance and MSL 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can MAX9022ASA+ directly replace ALD2302ASAL on the same PCB?

A: Yes. Both devices are housed in 8-SOIC packages with identical pin pitch (0.154" width) and surface-mount configuration. Electrical parameters are compatible: input offset voltage is identical (1mV @ 5V), and supply voltage ranges overlap within the 2.5V to 5.5V window. The MAX9022 series operates at lower quiescent current and extended temperature range, making it a superior direct replacement.

Q: What is the key difference between MAX9022ASA+ and MAX9032ASA+?

A: Both are 8-SOIC dual comparators with identical input offset voltage (1mV @ 5V) and operating temperature range (-40°C to 125°C). The primary difference is output configuration: MAX9022 supports CMOS, rail-to-rail, and TTL outputs, while MAX9032 is limited to push-pull and rail-to-rail outputs. MAX9032 features faster propagation delay (228ns) and higher CMRR/PSRR (100dB each). Selection depends on output type requirements.

Q: Why would I choose a TSOT-23-8 package over 8-SOIC?

A: TSOT-23-8 packaging (LTC6702CTS8#TRMPBF) reduces board footprint by approximately 40% compared to 8-SOIC, enabling higher component density in space-constrained designs. Electrical performance is comparable: input offset is 4.6mV, quiescent current is 32µA, and operating temperature matches the original part (0°C to 70°C). The trade-off is reduced output current capability and slightly higher input offset voltage.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification and MSL 1 (unlimited) moisture sensitivity rating, matching the original ALD2302ASAL specifications. This ensures compatibility with standard manufacturing processes and environmental regulations.

Q: What is the supply voltage compatibility window for substitution?

A: The ALD2302ASAL operates at 4V to 10V (single supply) or ±2V to ±5V (dual supply). Substitute parts must support at least the 5V nominal operating point. Most alternatives (MAX9022, MAX9032, MAX989) operate within 2.5V to 5.5V single supply or ±1.25V to ±2.75V dual supply, which overlaps the critical 5V window. For applications requiring the full 4V to 10V range, verify the specific substitute part's datasheet.

Q: Can I use MAX989ESA+ as a drop-in replacement?

A: MAX989ESA+ is functionally compatible in 8-SOIC packaging with matching input offset voltage (5mV maximum) and output type flexibility (CMOS, push-pull, rail-to-rail, TTL). Supply voltage range is 2.5V to 5.5V single or ±1.25V to ±2.75V dual, which covers the 5V nominal operating point. Operating temperature extends to -40°C to 85°C. This device is suitable for direct substitution in applications operating within these parameters.

Q: What is the propagation delay difference between ALD2302ASAL and substitute parts?

A: The original ALD2302ASAL does not specify propagation delay in the provided data. Among substitutes, MAX9032ASA+ offers the fastest response (228ns), while MAX9017BEKA+T (with integrated reference) specifies 28µs. LTC6702 series specifies 450ns. Selection should be based on application timing requirements and the specific substitute part's datasheet specifications.

Q: Are there any output current limitations I should consider?

A: The ALD2302ASAL specifies 60mA typical output current. MAX9022 and MAX9032 series do not specify typical output current in the provided data. MAX989ESA+ specifies 24µA quiescent current but does not specify output current. For applications requiring high output current (>50mA), verify the substitute part's datasheet output current specification before selection.

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