AD8044AR-14 Equivalent & Substitute Parts

Part Overview

The AD8044AR-14 is a voltage feedback operational amplifier featuring four independent circuits in a 14-SOIC surface mount package. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. The AD8044AR-14 delivers rail-to-rail output capability with a slew rate of 190V/µs and -3dB bandwidth of 160 MHz, suitable for general-purpose amplification applications requiring moderate to high-speed performance.

Key Parameters

Parameter	Value
Manufacturer Part Number	AD8044AR-14
Manufacturer	Analog Devices Inc.
Category	Linear, Amplifiers
Amplifier Type	Voltage Feedback
Number of Circuits	4
Output Type	Rail-to-Rail
Slew Rate	190V/µs
-3dB Bandwidth	160 MHz
Current - Input Bias	2 µA
Voltage - Input Offset	1.4 mV
Current - Supply	11.5 mA
Current - Output / Channel	30 mA
Voltage - Supply Span (Min)	3 V
Voltage - Supply Span (Max)	12 V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the AD8044AR-14 is determined by the following critical parameters: amplifier type (voltage feedback), number of circuits (4), output type (rail-to-rail), package type (14-SOIC), and mounting method (surface mount). These parameters establish the baseline compatibility framework.

Substitute parts are grouped into two categories:

Direct Equivalent: Parts that maintain identical electrical specifications and amplifier classification. The AD8044ARZ-14 is a direct equivalent, differing only in packaging format (tube versus unspecified) and product status (active versus obsolete).

Functional Alternatives: Parts that share the same package, circuit count, and output type but differ in amplifier classification or electrical performance characteristics. These include voltage feedback amplifiers (MAX4020ESD+, MAX4020ESD+T, MAX4383ESD+, MAX4383ESD+T) and general-purpose amplifiers (LT1805CS, LT1805CS#PBF, LT1805CS#TRPBF, LT1805IS#PBF, LT1805IS#TRPBF).

Substitution compatibility is determined by matching: amplifier type, circuit count, output type, package configuration, and operating temperature range. Electrical performance parameters (slew rate, bandwidth, input bias current, supply current) vary among alternatives and must be evaluated against specific application requirements.

Parameter Comparison

Parameter	AD8044AR-14	AD8044ARZ-14	MAX4020ESD+	MAX4020ESD+T	MAX4383ESD+	MAX4383ESD+T	LT1805CS	LT1805CS#PBF	LT1805CS#TRPBF	LT1805IS#PBF	LT1805IS#TRPBF
Amplifier Type	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	4	4	4	4	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	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	190	190	600	600	485	485	100	100	100	100	100
-3dB Bandwidth / Gain Bandwidth Product (MHz)	160	160	150	150	210	210	83	83	83	83	83
Current - Input Bias (µA)	2	2	5.4	5.4	8.5	8.5	2.5	2.5	2.5	2.5	2.5
Voltage - Input Offset (mV)	1.4	1.4	4	4	3	3	1.5	1.5	1.5	1.5	1.5
Current - Supply (mA)	11.5	11.5	5.5	5.5	7.5	7.5	2.5	2.5	2.5	2.5	2.5
Current - Output / Channel (mA)	30	30	120	120	75	75	50	50	50	50	50
Voltage - Supply Span (Min)	3 V	3 V	3.15 V	3.15 V	4.5 V	4.5 V	2.3 V	2.3 V	2.3 V	2.3 V	2.3 V
Voltage - Supply Span (Max)	12 V	12 V	11 V	11 V	11 V	11 V	12.6 V	12.6 V	12.6 V	12.6 V	12.6 V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent Selection:

The AD8044ARZ-14 is the primary direct equivalent for the obsolete AD8044AR-14. This part maintains identical electrical specifications, amplifier classification, circuit count, and package configuration. The AD8044ARZ-14 is active in product status and ROHS3 compliant, providing regulatory compliance for new designs. Selection of AD8044ARZ-14 is appropriate when exact electrical performance matching is required and the tube packaging format is acceptable for manufacturing processes.

Voltage Feedback Amplifier Alternatives:

The MAX4020ESD+, MAX4020ESD+T, MAX4383ESD+, and MAX4383ESD+T are voltage feedback amplifiers in 14-SOIC packages with active product status and ROHS3 compliance. These parts share the same amplifier type and package as the AD8044AR-14 but exhibit different electrical performance characteristics. The MAX4020 series provides higher slew rate (600V/µs) and output current capability (120 mA per channel) with lower supply current (5.5 mA). The MAX4383 series offers the highest bandwidth (210 MHz) and slew rate (485V/µs) among voltage feedback alternatives. Selection of these alternatives is appropriate when application requirements permit higher performance specifications or when specific electrical characteristics provide design advantages.

General Purpose Amplifier Alternatives:

The LT1805 series (LT1805CS, LT1805CS#PBF, LT1805CS#TRPBF, LT1805IS#PBF, LT1805IS#TRPBF) comprises general-purpose amplifiers in 14-SOIC packages with active product status and ROHS3 compliance. These parts differ from the AD8044AR-14 in amplifier classification and electrical performance. The LT1805 series provides lower supply current (2.5 mA) and lower slew rate (100V/µs) compared to the AD8044AR-14. The LT1805IS variants support the full operating temperature range (-40°C ~ 85°C) matching the AD8044AR-14, while LT1805CS variants are limited to 0°C ~ 70°C. Selection of LT1805 alternatives is appropriate for applications where lower power consumption is prioritized and reduced bandwidth requirements are acceptable.

Packaging and Compliance Considerations:

All substitute parts are available in active product status with ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating. Packaging variants (tube, tape & reel) are available across the substitute portfolio, enabling compatibility with various manufacturing processes. Selection should account for specific manufacturing requirements regarding packaging format and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the AD8044ARZ-14 directly replace the AD8044AR-14 in existing designs?

A: Yes. The AD8044ARZ-14 is a direct equivalent with identical electrical specifications, amplifier type, circuit count, and package configuration. The primary difference is product status (active versus obsolete) and packaging format. Designs using the AD8044AR-14 can transition to AD8044ARZ-14 without circuit modification.

Q: What are the key differences between voltage feedback and general-purpose amplifier classifications?

A: Voltage feedback amplifiers (AD8044AR-14, MAX4020, MAX4383) are optimized for applications requiring controlled gain and bandwidth characteristics through external feedback networks. General-purpose amplifiers (LT1805 series) provide broader application flexibility with different frequency response and power consumption profiles. Selection depends on specific application requirements for gain, bandwidth, and power efficiency.

Q: Are the MAX4020 and MAX4383 series suitable replacements for the AD8044AR-14?

A: The MAX4020 and MAX4383 series are functionally compatible alternatives sharing the same package and circuit count. However, they exhibit different electrical performance characteristics. The MAX4020 provides higher slew rate (600V/µs) and output current (120 mA per channel). The MAX4383 offers higher bandwidth (210 MHz). Selection requires verification that application requirements accommodate these performance differences.

Q: What is the significance of operating temperature range differences among substitute parts?

A: The AD8044AR-14 operates across -40°C ~ 85°C. The LT1805CS variants are limited to 0°C ~ 70°C, while LT1805IS variants support the full -40°C ~ 85°C range. Applications requiring extended temperature operation must select parts with matching or broader temperature specifications. The LT1805IS#PBF and LT1805IS#TRPBF variants are appropriate for temperature-critical applications.

Q: How do supply current differences affect design considerations?

A: The AD8044AR-14 requires 11.5 mA total supply current. The MAX4020 series requires 5.5 mA, MAX4383 requires 7.5 mA, and LT1805 series requires 2.5 mA. Lower supply current reduces power dissipation and thermal management requirements. Applications with power budget constraints may benefit from lower-current alternatives, provided other electrical specifications remain acceptable.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in tube packaging and tape & reel (TR) packaging formats. Tube packaging (standard packaging) is suitable for manual assembly and lower-volume production. Tape & reel packaging is optimized for automated assembly processes. Selection should align with manufacturing process requirements and supply chain logistics.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating. The AD8044AR-14 does not specify RoHS status. Designs requiring regulatory compliance with RoHS directives should transition to substitute parts with confirmed ROHS3 compliance.

Q: What is the impact of input bias current differences on circuit design?

A: The AD8044AR-14 specifies 2 µA input bias current. Substitute parts range from 2.5 µA (LT1805 series) to 8.5 µA (MAX4383 series). Higher input bias current increases input impedance loading effects and may require circuit compensation in high-impedance applications. Applications sensitive to input bias current should prioritize substitutes with lower specifications or verify circuit tolerance to increased bias current.

Q: Can the LT1805 series replace the AD8044AR-14 in high-frequency applications?

A: The LT1805 series provides 83 MHz gain-bandwidth product compared to the AD8044AR-14's 160 MHz bandwidth. Applications requiring bandwidth above 83 MHz should not use LT1805 alternatives. The MAX4383 series (210 MHz) or MAX4020 series (150 MHz) are more appropriate for high-frequency requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message