THS4275DR Equivalent & Substitute Parts

Part Overview

The THS4275DR is a voltage feedback amplifier integrated circuit manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is classified as obsolete, indicating it is no longer in active production. The THS4275DR provides a single amplification circuit with a slew rate of 1000V/µs and a gain bandwidth product of 400 MHz, designed for high-speed signal conditioning applications.

Due to its obsolete status, identifying equivalent substitute parts is necessary for design continuity, system maintenance, and procurement of new units. Substitute parts must maintain functional compatibility through equivalent electrical parameters and identical mechanical packaging specifications.

Key Parameters

Parameter	THS4275DR Value
Amplifier Type	Voltage Feedback
Number of Circuits	1
Slew Rate	1000V/µs
Gain Bandwidth Product	400 MHz
-3dB Bandwidth	1.4 GHz
Current - Input Bias	6 µA
Voltage - Input Offset	5 mV
Current - Supply	22 mA
Voltage - Supply Span (Min)	5 V
Voltage - Supply Span (Max)	15 V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the THS4275DR is determined by strict adherence to the following criteria:

Mandatory Compatibility Parameters:

Amplifier Type: Voltage Feedback
Number of Circuits: 1
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Operating Temperature Range: -40°C ~ 85°C
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Electrical Performance Parameters: Substitute parts must operate within the supply voltage range of the THS4275DR (5V to 15V minimum and maximum respectively). The slew rate, gain bandwidth product, input bias current, input offset voltage, and supply current are performance characteristics that may vary between substitutes while maintaining functional equivalence in typical applications.

The identified substitute parts—AD8037ARZ-REEL7, MAX4265ESA+, and MAX4265ESA+T—satisfy all mandatory compatibility parameters and operate within the specified temperature and supply voltage ranges.

Parameter Comparison

Parameter	THS4275DR	AD8037ARZ-REEL7	MAX4265ESA+	MAX4265ESA+T
Manufacturer	Texas Instruments	Analog Devices Inc.	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Product Status	Obsolete	Active	Active	Active
Amplifier Type	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback
Number of Circuits	1	1	1	1
Slew Rate	1000V/µs	1500V/µs	900V/µs	900V/µs
Gain Bandwidth Product	400 MHz	—	400 MHz	400 MHz
-3dB Bandwidth	1.4 GHz	270 MHz	400 MHz	400 MHz
Current - Input Bias	6 µA	3 µA	3.5 µA	3.5 µA
Voltage - Input Offset	5 mV	2 mV	1 mV	1 mV
Current - Supply	22 mA	18.5 mA	28 mA	28 mA
Voltage - Supply Span (Min)	5 V	6 V	4.5 V	4.5 V
Voltage - Supply Span (Max)	15 V	12 V	8 V	8 V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
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)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

AD8037ARZ-REEL7 (Analog Devices Inc.)

The AD8037ARZ-REEL7 is an active substitute with superior slew rate performance (1500V/µs) and lower input bias current (3 µA) compared to the THS4275DR. This device is supplied in Tape & Reel packaging and maintains ROHS3 compliance. The minimum supply voltage requirement is 6V, which is higher than the THS4275DR minimum of 5V. The maximum supply voltage is 12V, which is lower than the THS4275DR maximum of 15V. Applications operating within the 6V to 12V supply range will achieve full compatibility. The -3dB bandwidth of 270 MHz is lower than the THS4275DR specification of 1.4 GHz.

MAX4265ESA+ (Analog Devices Inc./Maxim Integrated)

The MAX4265ESA+ is an active substitute with matching gain bandwidth product (400 MHz) and -3dB bandwidth (400 MHz) to the THS4275DR. This device features lower input offset voltage (1 mV) and input bias current (3.5 µA). The supply voltage range is 4.5V to 8V, which is narrower than the THS4275DR range of 5V to 15V. Applications requiring operation at supply voltages above 8V are not compatible with this substitute. The slew rate is 900V/µs, which is lower than the THS4275DR specification of 1000V/µs. This device is supplied in Tube packaging and maintains ROHS3 compliance.

MAX4265ESA+T (Analog Devices Inc./Maxim Integrated)

The MAX4265ESA+T is functionally equivalent to the MAX4265ESA+ with identical electrical specifications. This variant provides output current per channel specification of 45 mA. The supply voltage range, slew rate, gain bandwidth product, and -3dB bandwidth are identical to the MAX4265ESA+. This device maintains ROHS3 compliance and MSL rating of 1 (Unlimited).

All three substitute parts are currently in active production status, ensuring long-term availability and supply chain continuity compared to the obsolete THS4275DR.

Frequently Asked Questions (FAQ)

Q: Can the AD8037ARZ-REEL7 be used as a direct replacement for the THS4275DR in all applications?

A: The AD8037ARZ-REEL7 is mechanically and functionally compatible with the THS4275DR in applications where the supply voltage operates between 6V and 12V. Applications requiring supply voltages below 6V or above 12V are not compatible with this substitute. The lower -3dB bandwidth (270 MHz versus 1.4 GHz) must be evaluated against application frequency requirements.

Q: What is the primary difference between MAX4265ESA+ and MAX4265ESA+T?

A: Both devices share identical electrical specifications. The MAX4265ESA+T provides an additional specification for output current per channel (45 mA). The primary distinction is packaging designation; MAX4265ESA+ is supplied in Tube packaging, while MAX4265ESA+T packaging is not specified in the provided data.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts—AD8037ARZ-REEL7, MAX4265ESA+, and MAX4265ESA+T—are ROHS3 compliant and maintain Moisture Sensitivity Level 1 (Unlimited), matching the compliance profile of the THS4275DR.

Q: Which substitute part most closely matches the THS4275DR electrical performance?

A: The MAX4265ESA+ and MAX4265ESA+T provide the closest match to the THS4275DR gain bandwidth product (400 MHz) and -3dB bandwidth (400 MHz). However, these devices operate within a narrower supply voltage range (4.5V to 8V) compared to the THS4275DR (5V to 15V).

Q: Can the THS4275DR be replaced in high-voltage applications requiring 15V supply?

A: The AD8037ARZ-REEL7 supports maximum supply voltage of 12V, and the MAX4265ESA+ and MAX4265ESA+T support maximum supply voltage of 8V. Neither substitute supports the full 15V maximum supply voltage of the THS4275DR. Applications requiring 15V supply operation are not compatible with the identified substitute parts.

Q: What is the impact of different slew rates on circuit performance?

A: The THS4275DR specifies 1000V/µs slew rate. The AD8037ARZ-REEL7 provides 1500V/µs (higher), while MAX4265ESA+ and MAX4265ESA+T provide 900V/µs (lower). Slew rate determines the maximum rate of voltage change in the output signal. Applications with fast transient requirements may benefit from the higher slew rate of the AD8037ARZ-REEL7, while applications with slower signal requirements are compatible with the lower slew rate of the MAX4265 variants.

Q: Are all substitute parts available in the same 8-SOIC package?

A: All substitute parts are housed in 8-SOIC (0.154", 3.90mm Width) packages, identical to the THS4275DR. This ensures mechanical compatibility with existing printed circuit board layouts and assembly processes.

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