THS3095DDA Equivalent & Substitute Parts Reference

Part Overview

The THS3095DDA is a Current Feedback Amplifier (CFA) manufactured by Texas Instruments, housed in an 8-PowerSOIC package with PowerPad thermal enhancement. This device delivers high-speed signal conditioning with a slew rate of 7300V/µs and -3dB bandwidth of 235 MHz, suitable for applications requiring fast transient response and wide bandwidth performance.

The THS3095DDA is classified as Last Time Buy, indicating discontinued production status. Equivalent substitute parts are necessary to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Current Feedback	—
Number of Circuits	1	—
Slew Rate	7300	V/µs
-3dB Bandwidth	235	MHz
Current - Input Bias	4	µA
Voltage - Input Offset	900	µV
Current - Supply	9.5	mA
Current - Output / Channel	280	mA
Voltage - Supply Span (Min)	10	V
Voltage - Supply Span (Max)	30	V
Operating Temperature Range	-40 to 85	°C
Package / Case	8-PowerSOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the THS3095DDA is determined by the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: Current Feedback architecture
Number of Circuits: Single circuit configuration
Package Compatibility: 8-pin SOIC or 8-PowerSOIC form factor
Mounting Type: Surface Mount
Operating Temperature Range: Must encompass or match -40°C to 85°C
Supply Voltage Range: Must support 10V to 30V operation
Regulatory Compliance: ROHS3 and REACH compliance required

Performance Parameters Defining Substitution Scope:

Slew Rate: 7300V/µs (primary performance metric)
-3dB Bandwidth: 235 MHz (primary performance metric)
Output Current Capability: 280 mA per channel
Input Bias Current: 4 µA maximum
Input Offset Voltage: 900 µV maximum

Substitute parts are grouped into two categories based on performance alignment:

Category 1 - Direct Functional Equivalents (Texas Instruments): THS3095DDAR maintains identical electrical specifications and performance characteristics as the THS3095DDA, differing only in packaging format (Cut Tape & Digi-Reel versus Tube).

Category 2 - Functional Alternatives (Analog Devices Inc.): LT1228 and LT1252 series devices provide current feedback amplification in compatible 8-SO packages. These parts operate within the same supply voltage range and mounting technology but exhibit different performance profiles in slew rate, bandwidth, and output current specifications.

Parameter Comparison

Parameter	THS3095DDA	THS3095DDAR	LT1228CS8#PBF	LT1228IS8#PBF	LT1252CS8#PBF
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	Current Feedback	Current Feedback	Current Feedback	Current Feedback	Current Feedback
Number of Circuits	1	1	1	1	1
Slew Rate (V/µs)	7300	7300	3500	3500	125
-3dB Bandwidth (MHz)	235	235	100	100	282
Current - Input Bias (µA)	4	4	10	10	—
Voltage - Input Offset (mV)	0.9	0.9	3	3	—
Current - Supply (mA)	9.5	9.5	6	6	8.5
Current - Output / Channel (mA)	280	280	125	125	55
Voltage - Supply Span Min (V)	10	10	4	4	4
Voltage - Supply Span Max (V)	30	30	36	36	28
Operating Temperature (°C)	-40 to 85	-40 to 85	0 to 70	-40 to 85	0 to 70
Package / Case	8-PowerSOIC	8-PowerSOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Last Time Buy	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: THS3095DDAR

The THS3095DDAR is the preferred substitute for THS3095DDA applications. This device maintains 100% electrical and functional equivalence with identical performance specifications across all critical parameters: slew rate (7300V/µs), bandwidth (235 MHz), output current (280 mA), and supply voltage range (10V to 30V). The only difference is packaging format: THS3095DDAR is supplied in Cut Tape & Digi-Reel format versus Tube packaging for the original part.

Both devices carry Active product status, ensuring long-term availability and manufacturing support. Both are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The THS3095DDAR has significantly higher inventory availability (60,200 pieces) compared to the original THS3095DDA (3,200 pieces), providing supply chain security.

Secondary Recommendations: LT1228 Series (Analog Devices Inc.)

The LT1228IS8#PBF and LT1228IS8#TRPBF variants are suitable substitutes when the THS3095DDAR is unavailable. These devices provide current feedback amplification in compatible 8-SOIC packages with identical mounting technology and form factor.

The LT1228IS8#PBF variant operates across the full industrial temperature range (-40°C to 85°C), matching the THS3095DDA operating window. This part is available in high volume (27,870 pieces) and carries Active product status.

Trade-offs with LT1228 substitution include reduced slew rate (3500V/µs versus 7300V/µs) and reduced bandwidth (100 MHz versus 235 MHz). Output current capability is also reduced to 125 mA per channel. These performance reductions are acceptable only for applications where the lower slew rate and bandwidth do not compromise system performance.

The LT1228CS8#PBF variant operates over a narrower temperature range (0°C to 70°C) and is not recommended for applications requiring full -40°C to 85°C operation.

Tertiary Recommendation: LT1252 Series (Analog Devices Inc.)

The LT1252CS8#PBF and LT1252CS8#TRPBF are alternative current feedback amplifiers with higher bandwidth (282 MHz) but significantly lower slew rate (125V/µs). These devices are suitable only for applications where bandwidth is the primary performance criterion and slew rate requirements are relaxed.

The LT1252 series operates over a narrower temperature range (0°C to 70°C) and is not recommended for applications requiring full -40°C to 85°C operation. Output current capability is reduced to 55 mA per channel.

Frequently Asked Questions (FAQ)

Q1: Can THS3095DDAR be used as a direct replacement for THS3095DDA in existing designs?

A: Yes. The THS3095DDAR is a direct functional equivalent with identical electrical specifications. The only difference is packaging format (Cut Tape & Digi-Reel versus Tube). Both devices are pin-compatible in 8-PowerSOIC packages and require no circuit modifications. Verify that your assembly equipment can accommodate the different packaging format.

Q2: What are the key performance differences between THS3095DDA and LT1228IS8#PBF?

A: The THS3095DDA provides superior high-frequency performance with 7300V/µs slew rate and 235 MHz bandwidth, compared to LT1228IS8#PBF at 3500V/µs and 100 MHz. The THS3095DDA also delivers higher output current (280 mA versus 125 mA). The LT1228IS8#PBF operates across the same temperature range (-40°C to 85°C) and supply voltage range (4V to 36V, which encompasses the THS3095DDA requirement of 10V to 30V). Substitution is viable only if your application does not require the higher slew rate and bandwidth of the THS3095DDA.

Q3: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (THS3095DDAR, LT1228 series, and LT1252 series) are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q4: What is the difference between LT1228CS8#PBF and LT1228IS8#PBF?

A: Both devices are identical in electrical performance and package type (8-SOIC). The primary difference is operating temperature range: LT1228CS8#PBF operates 0°C to 70°C (commercial grade), while LT1228IS8#PBF operates -40°C to 85°C (industrial grade). For applications requiring full temperature range operation, use LT1228IS8#PBF.

Q5: Can LT1252 series replace THS3095DDA in high-speed applications?

A: No. Although LT1252 offers higher bandwidth (282 MHz), it provides significantly lower slew rate (125V/µs versus 7300V/µs). This makes LT1252 unsuitable for applications requiring fast transient response. Use LT1252 only when bandwidth is the primary performance criterion and slew rate requirements are relaxed.

Q6: What packaging formats are available for substitute parts?

A: THS3095DDAR is available in Cut Tape & Digi-Reel format. LT1228 and LT1252 series are available in both Tube and Tape & Reel formats. Verify your assembly process requirements before selecting packaging format. All devices use identical 8-pin SOIC or 8-PowerSOIC form factors suitable for surface mount assembly.

Q7: Which substitute part has the highest inventory availability?

A: LT1228IS8#PBF has the highest inventory (27,870 pieces), followed by THS3095DDAR (60,200 pieces). For immediate availability and supply chain security, prioritize these two options.

Q8: Are there any pin compatibility issues between substitute parts?

A: All substitute parts use 8-pin SOIC or 8-PowerSOIC packages with identical pin assignments for current feedback amplifier configurations. Pin compatibility is maintained across all listed substitutes. However, verify pinout diagrams for your specific application to confirm signal routing compatibility.

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