THS4041IDRG4 Equivalent & Substitute Parts

Part Overview

The THS4041IDRG4 is a voltage feedback amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and production continuity. The part delivers high slew rate performance at 400V/µs with a -3dB bandwidth of 165 MHz, suitable for applications requiring fast transient response and wide bandwidth characteristics.

Key Parameters

Parameter	Value
Manufacturer Part Number	THS4041IDRG4
Manufacturer	Texas Instruments
Category	Linear, Amplifiers
Amplifier Type	Voltage Feedback
Number of Circuits	1
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	400V/µs
-3dB Bandwidth	165 MHz
Current - Input Bias	2.5 µA
Voltage - Input Offset	2.5 mV
Current - Supply	8 mA
Current - Output / Channel	100 mA
Voltage - Supply Span (Min)	9 V
Voltage - Supply Span (Max)	32 V
Operating Temperature	-40°C ~ 85°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the THS4041IDRG4 is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the 8-SOIC surface mount package with 0.154" (3.90mm) width to ensure direct PCB footprint compatibility.

Amplifier Classification: The THS4041IDRG4 is a voltage feedback amplifier. Substitute parts are grouped into two categories:

Voltage Feedback Amplifiers (LT1360CS8#PBF, LT1360CS8#TRPBF): These maintain the same amplifier topology and are preferred for direct functional replacement.
General Purpose Amplifiers (AD847JRZ, AD847JRZ-REEL, AD847JRZ-REEL7): These offer alternative amplifier architecture with different performance characteristics but compatible electrical interfaces.

Supply Voltage Range: Substitute parts must support the minimum 9V supply requirement of the original design. The THS4041IDRG4 operates from 9V to 32V; substitute parts must accommodate this range or provide overlap within the design operating window.

Output Current Capability: The THS4041IDRG4 delivers 100 mA per channel. Substitute parts with lower output current ratings (32 mA for AD847 series, 34 mA for LT1360 series) require circuit design verification for load compatibility.

Slew Rate and Bandwidth: The THS4041IDRG4 provides 400V/µs slew rate and 165 MHz bandwidth. Substitute parts exhibit different performance: LT1360 series offers 800V/µs slew rate; AD847 series provides 300V/µs slew rate. These differences affect transient response and frequency response characteristics.

Product Status and Compliance: All substitute parts are active products with ROHS3 compliance and MSL 1 rating, ensuring long-term availability and environmental compliance.

Parameter Comparison

Parameter	THS4041IDRG4	AD847JRZ	AD847JRZ-REEL	AD847JRZ-REEL7	LT1360CS8#PBF	LT1360CS8#TRPBF
Manufacturer	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	Voltage Feedback	General Purpose	General Purpose	General Purpose	Voltage Feedback	Voltage Feedback
Number of Circuits	1	1	1	1	1	1
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate	400V/µs	300V/µs	300V/µs	300V/µs	800V/µs	800V/µs
Gain Bandwidth Product	165 MHz	50 MHz	50 MHz	50 MHz	50 MHz	50 MHz
Current - Input Bias	2.5 µA	3.3 µA	3.3 µA	3.3 µA	300 nA	300 nA
Voltage - Input Offset	2.5 mV	500 µV	500 µV	500 µV	300 µV	300 µV
Current - Supply	8 mA	5.3 mA	5.3 mA	5.3 mA	4 mA	4 mA
Current - Output / Channel	100 mA	32 mA	32 mA	32 mA	34 mA	34 mA
Voltage - Supply Span (Min)	9 V	9 V	9 V	9 V	5 V	5 V
Voltage - Supply Span (Max)	32 V	36 V	36 V	36 V	30 V	30 V
Operating Temperature	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Voltage Feedback Topology):

The LT1360CS8#PBF and LT1360CS8#TRPBF represent the closest functional equivalents to the THS4041IDRG4, maintaining voltage feedback amplifier architecture. These parts are active products with full ROHS3 compliance and unlimited moisture sensitivity rating. The LT1360 series delivers superior slew rate performance at 800V/µs compared to the original 400V/µs specification. Both packaging options (tube and tape & reel) provide flexibility for manufacturing processes. The supply voltage range of 5V to 30V encompasses the original 9V to 32V requirement. The reduced output current capability (34 mA versus 100 mA) and lower gain bandwidth product (50 MHz versus 165 MHz) require circuit-level evaluation for specific load and frequency response requirements.

Secondary Substitutes (General Purpose Topology):

The AD847JRZ, AD847JRZ-REEL, and AD847JRZ-REEL7 offer alternative general purpose amplifier architecture with active product status and full compliance certifications. These parts provide lower input offset voltage (500 µV) and reduced input bias current (3.3 µA) compared to the original specifications. The 300V/µs slew rate is lower than the THS4041IDRG4, affecting transient response in high-speed applications. Output current capability of 32 mA is significantly reduced from the original 100 mA specification. The three variants differ only in packaging: AD847JRZ (tube), AD847JRZ-REEL (tape & reel), and AD847JRZ-REEL7 (cut tape & Digi-Reel). Supply voltage compatibility extends to 36V maximum, providing margin above the original specification.

Temperature Range Consideration:

All substitute parts operate within 0°C to 70°C, which is narrower than the original THS4041IDRG4 range of -40°C to 85°C. Applications requiring extended temperature operation below 0°C or above 70°C require alternative component selection.

Frequently Asked Questions (FAQ)

Q: Can the LT1360CS8#PBF directly replace the THS4041IDRG4 in all applications?

A: The LT1360CS8#PBF shares the same 8-SOIC package and voltage feedback amplifier topology, enabling direct PCB footprint compatibility. However, the reduced output current capability (34 mA versus 100 mA) and lower gain bandwidth product (50 MHz versus 165 MHz) require verification that the application load and frequency response requirements are satisfied. The narrower operating temperature range (0°C to 70°C versus -40°C to 85°C) excludes use in extended temperature environments.

Q: What is the difference between AD847JRZ, AD847JRZ-REEL, and AD847JRZ-REEL7?

A: These three parts are electrically identical general purpose amplifiers with identical electrical specifications. The differences are packaging only: AD847JRZ is supplied in tube packaging, AD847JRZ-REEL is supplied in tape & reel format, and AD847JRZ-REEL7 is supplied in cut tape with Digi-Reel format. Selection depends on manufacturing process requirements and volume handling preferences.

Q: Why does the LT1360 series have higher slew rate than the original THS4041IDRG4?

A: The LT1360 series delivers 800V/µs slew rate compared to the THS4041IDRG4 at 400V/µs. This represents improved transient response capability. Applications sensitive to slew rate limitations benefit from this enhancement, while applications with slew rate margin requirements are unaffected.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed (LT1360CS8#PBF, LT1360CS8#TRPBF, AD847JRZ, AD847JRZ-REEL, AD847JRZ-REEL7) are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating, matching the original THS4041IDRG4 compliance status.

Q: What is the critical limitation when substituting with AD847 series parts?

A: The AD847 series uses general purpose amplifier architecture rather than voltage feedback topology. The output current capability is reduced to 32 mA compared to the original 100 mA specification. Applications with high output current requirements or heavy capacitive loads require circuit redesign or alternative component selection.

Q: Can substitute parts operate at the original -40°C to 85°C temperature range?

A: No. All substitute parts operate within 0°C to 70°C, which is narrower than the original THS4041IDRG4 specification of -40°C to 85°C. Applications requiring operation below 0°C or above 70°C cannot use these substitutes without alternative component selection.

Q: What supply voltage range is compatible with all substitute parts?

A: The overlapping supply voltage range across all substitutes is 9V to 30V. The original THS4041IDRG4 operates from 9V to 32V. The LT1360 series maximum of 30V represents the limiting factor. Applications requiring operation above 30V require alternative component selection.

Q: Is the LT1360CS8#TRPBF preferred over LT1360CS8#PBF for high-volume production?

A: The LT1360CS8#TRPBF is supplied in tape & reel format, which is standard for automated assembly processes. The LT1360CS8#PBF is supplied in tube format, suitable for lower-volume or manual assembly operations. Selection depends on manufacturing process requirements rather than electrical performance, as both parts are electrically identical.

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