THS4022CD Equivalent & Substitute Parts

Part Overview

The THS4022CD is a voltage feedback amplifier integrated circuit manufactured by Texas Instruments, configured as a dual-channel operational amplifier in an 8-SOIC surface mount package. This device is classified as Last Time Buy, indicating that Texas Instruments has discontinued active production and existing inventory represents the final availability from the manufacturer.

The THS4022CD delivers high-speed amplification with a 350 MHz gain bandwidth product and 470 V/µs slew rate, suitable for applications requiring wideband signal conditioning and high-frequency amplification. With a supply voltage range of 9 V to 32 V and dual-channel configuration, the device supports symmetric dual-supply operation.

Due to Last Time Buy status, identifying equivalent and substitute parts is necessary for design continuity, long-term production planning, and supply chain resilience. Substitute parts must maintain functional equivalence across critical electrical parameters including bandwidth, slew rate, supply voltage range, and package compatibility.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Voltage Feedback	—
Number of Circuits	2	—
Gain Bandwidth Product	350	MHz
-3dB Bandwidth	350	MHz
Slew Rate	470	V/µs
Current - Input Bias	3	µA
Voltage - Input Offset	500	µV
Current - Supply (per Channel)	7.8	mA
Current - Output / Channel	100	mA
Voltage - Supply Span (Min)	9	V
Voltage - Supply Span (Max)	32	V
Operating Temperature Range	0 to 70	°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 THS4022CD is determined by functional equivalence across the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: Voltage Feedback (required)
Number of Circuits: 2 (required)
Package / Case: 8-SOIC or compatible surface mount package (required)
Gain Bandwidth Product: 350 MHz or greater (required for performance equivalence)
Slew Rate: 470 V/µs or greater (required for transient response equivalence)
Supply Voltage Range: Minimum 9 V to maximum 32 V (required for circuit compatibility)
Operating Temperature: 0°C to 70°C or extended range (required for environmental compatibility)

Secondary Compatibility Factors:

Current - Input Bias: 3 µA or lower (preferred for input impedance matching)
Voltage - Input Offset: 500 µV or lower (preferred for DC accuracy)
Current - Output / Channel: 100 mA or greater (required for load driving capability)
RoHS3 Compliance and MSL rating (required for manufacturing and environmental standards)

Substitute parts are grouped into two categories:

Category 1: Direct Functional Equivalents (Same Package, Identical Specifications) Parts maintaining identical electrical specifications and 8-SOIC package form factor. These substitutes provide pin-for-pin compatibility with no circuit redesign required.

Category 2: Functional Equivalents with Package Variation (Different Package, Equivalent Specifications) Parts maintaining equivalent electrical specifications but in alternative surface mount packages (8-HVSSOP, 8-TSSOP). These require PCB layout modification but preserve electrical performance.

Category 3: Performance-Reduced Substitutes (Lower Bandwidth/Slew Rate) Parts with reduced gain bandwidth product or slew rate but maintaining dual-channel voltage feedback architecture and compatible supply voltage range. These are suitable for applications not requiring full 350 MHz bandwidth.

Parameter Comparison

Part Number	Manufacturer	Product Status	Gain Bandwidth (MHz)	Slew Rate (V/µs)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Output Current (mA)
THS4022CD	Texas Instruments	Last Time Buy	350	470	9	32	0 to 70	8-SOIC	100
THS4022CDGNR	Texas Instruments	Obsolete	350	470	9	32	0 to 70	8-HVSSOP	100
AD826ARZ	Analog Devices Inc.	Active	50	350	5	36	-40 to 85	8-SOIC	50
AD826ARZ-REEL	Analog Devices Inc.	Active	50	350	5	36	-40 to 85	8-SOIC	50
AD826ARZ-REEL7	Analog Devices Inc.	Active	50	350	5	36	-40 to 85	8-SOIC	50
AD828ARZ	Analog Devices Inc.	Active	130	450	5	36	-40 to 85	8-SOIC	50
AD828ARZ-REEL7	Analog Devices Inc.	Active	130	450	5	36	-40 to 85	8-SOIC	50
ISL55002IBZ	Intersil	Active	70	300	4.5	30	-40 to 85	8-SOIC	140
ISL55002IBZ-T13	Renesas Electronics Corporation	Active	70	300	4.5	30	-40 to 85	8-SOIC	140
ISL55002IBZ-T7	Renesas Electronics Corporation	Active	70	300	4.5	30	-40 to 85	8-SOIC	140

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Identical Performance):

The THS4022CDGNR from Texas Instruments provides electrical equivalence to the THS4022CD with identical gain bandwidth product (350 MHz), slew rate (470 V/µs), and supply voltage range (9 V to 32 V). However, THS4022CDGNR is classified as Obsolete, limiting its viability for long-term production. The package differs (8-HVSSOP versus 8-SOIC), requiring PCB layout modification.

For Active Production with Extended Temperature Range:

The AD826ARZ, AD826ARZ-REEL, and AD826ARZ-REEL7 from Analog Devices Inc. are all Active status parts in 8-SOIC package with pin-compatible footprint to THS4022CD. These devices maintain the same package form factor and dual-channel voltage feedback architecture. However, the AD826 series exhibits reduced bandwidth (50 MHz versus 350 MHz) and lower slew rate (350 V/µs versus 470 V/µs), making them suitable only for applications not requiring the full performance envelope of the THS4022CD. The AD826 series offers extended operating temperature range (-40°C to 85°C) and higher maximum supply voltage (36 V). Output current per channel is reduced to 50 mA versus 100 mA on the THS4022CD.

For High-Bandwidth Active Substitute:

The AD828ARZ and AD828ARZ-REEL7 from Analog Devices Inc. provide higher bandwidth (130 MHz) and comparable slew rate (450 V/µs) in 8-SOIC package. These devices maintain dual-channel configuration and Active product status. However, output current per channel remains at 50 mA, and the -3dB bandwidth of 130 MHz falls below the THS4022CD specification of 350 MHz. These parts are suitable for applications requiring moderate bandwidth improvement over the AD826 series but not full THS4022CD performance.

For Alternative Packaging with Moderate Performance:

The ISL55002IBZ, ISL55002IBZ-T13, and ISL55002IBZ-T7 from Intersil and Renesas Electronics Corporation provide dual-channel voltage feedback amplification in 8-SOIC package with Active product status. These devices feature reduced gain bandwidth product (70 MHz) and slew rate (300 V/µs) compared to THS4022CD, but offer higher output current per channel (140 mA). Supply voltage range is 4.5 V to 30 V, which overlaps with THS4022CD requirements. Extended operating temperature range (-40°C to 85°C) is provided. These substitutes are suitable for applications prioritizing output current capability over bandwidth performance.

Compliance and Regulatory Considerations:

All recommended substitute parts maintain RoHS3 compliance and REACH Unaffected status, consistent with THS4022CD environmental and regulatory requirements. Moisture Sensitivity Level varies: THS4022CD and all Analog Devices parts are MSL 1 (Unlimited), while ISL55002 variants are MSL 3 (168 Hours), requiring controlled storage and handling procedures.

Frequently Asked Questions (FAQ)

Q: Can the AD826ARZ directly replace the THS4022CD in existing designs?

A: The AD826ARZ provides pin-compatible 8-SOIC packaging and dual-channel voltage feedback architecture. However, the reduced gain bandwidth product (50 MHz versus 350 MHz) and lower slew rate (350 V/µs versus 470 V/µs) mean the AD826ARZ is not functionally equivalent for high-frequency applications. Circuit redesign and performance validation are required if bandwidth reduction is acceptable for the application.

Q: What is the difference between THS4022CD and THS4022CDGNR?

A: Both devices provide identical electrical specifications: 350 MHz bandwidth, 470 V/µs slew rate, and 9 V to 32 V supply range. The primary difference is packaging: THS4022CD uses 8-SOIC while THS4022CDGNR uses 8-HVSSOP (8-TSSOP with exposed pad). THS4022CDGNR is classified as Obsolete, whereas THS4022CD is Last Time Buy. PCB layout modification is required to transition between these packages.

Q: Are the AD826ARZ, AD826ARZ-REEL, and AD826ARZ-REEL7 interchangeable?

A: These three part numbers represent the same device in different packaging formats: AD826ARZ is supplied in Tube packaging, while AD826ARZ-REEL and AD826ARZ-REEL7 are supplied in Cut Tape and Digi-Reel formats. Electrical specifications and 8-SOIC package dimensions are identical. Selection depends on procurement and assembly requirements rather than electrical performance.

Q: Why do the ISL55002 variants have higher output current than the THS4022CD?

A: The ISL55002 series is optimized for video amplifier applications requiring higher output current capability (140 mA per channel versus 100 mA). This design trade-off results in reduced bandwidth (70 MHz) and slew rate (300 V/µs) compared to the THS4022CD. Selection depends on whether the application requires maximum output current or maximum bandwidth.

Q: What is the impact of different operating temperature ranges on substitution?

A: The THS4022CD operates from 0°C to 70°C, while most substitute parts (AD826, AD828, ISL55002 variants) operate from -40°C to 85°C. If the application requires operation below 0°C or above 70°C, the THS4022CD cannot be replaced by these substitutes. Conversely, if the application operates within 0°C to 70°C, the extended temperature range of substitutes provides additional design margin.

Q: Can I use the ISL55002IBZ-T13 in place of ISL55002IBZ-T7?

A: Yes. Both ISL55002IBZ-T13 and ISL55002IBZ-T7 provide identical electrical specifications and 8-SOIC packaging. The suffix designates different tape reel configurations for automated assembly. Selection depends on assembly equipment compatibility and procurement logistics rather than electrical performance.

Q: What does "Last Time Buy" status mean for the THS4022CD?

A: Last Time Buy indicates that Texas Instruments has announced end-of-life for the THS4022CD and existing inventory represents the final availability from the manufacturer. No new production will occur after current stock is depleted. Design teams should evaluate substitute parts and implement transitions to ensure long-term product availability and supply chain continuity.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts maintain RoHS3 compliance. However, Moisture Sensitivity Level (MSL) differs: THS4022CD and Analog Devices parts are MSL 1 (Unlimited), while ISL55002 variants are MSL 3 (168 Hours). MSL 3 classification requires controlled storage at specified temperature and humidity, with a 168-hour shelf life limit after package opening.

Q: Which substitute provides the closest performance match to THS4022CD?

A: The THS4022CDGNR provides identical electrical specifications (350 MHz bandwidth, 470 V/µs slew rate) but is Obsolete. Among Active status parts, the AD828ARZ and AD828ARZ-REEL7 provide the highest bandwidth (130 MHz) and slew rate (450 V/µs), though still below THS4022CD specifications. No Active substitute provides full 350 MHz bandwidth equivalence.

Q: Can I use multiple lower-bandwidth devices in parallel to achieve THS4022CD performance?

A: Parallel connection of operational amplifiers introduces stability and phase margin complications not addressed by the provided electrical parameters. Circuit design validation and stability analysis are required for any parallel amplifier configuration. This approach is outside the scope of direct substitution.

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