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THS3112CDDA Equivalent & Substitute Parts
Part Overview
The THS3112CDDA is a current feedback amplifier integrated circuit manufactured by Texas Instruments, featuring two circuits in an 8-PowerSOIC surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The THS3112CDDA delivers a slew rate of 1550V/µs and -3dB bandwidth of 110 MHz, suitable for applications requiring moderate-speed signal amplification with current feedback topology.
Due to Last Time Buy status, identifying equivalent and substitute parts is necessary for design continuity and long-term component sourcing. Substitute parts listed below maintain functional compatibility through matching amplifier topology, circuit count, package form factor, and electrical operating parameters within acceptable ranges.
Substiute Parts
Key Parameters
| Parameter | THS3112CDDA | Unit |
|---|---|---|
| Amplifier Type | Current Feedback | — |
| Number of Circuits | 2 | — |
| Slew Rate | 1550 | V/µs |
| -3dB Bandwidth | 110 | MHz |
| Current - Input Bias | 330 | nA |
| Voltage - Input Offset | 3 | mV |
| Current - Supply (x2 Channels) | 4.9 | mA |
| Current - Output / Channel | 270 | mA |
| Voltage - Supply Span (Min) | 10 | V |
| Voltage - Supply Span (Max) | 30 | V |
| Operating Temperature | 0 to 70 | °C |
| Mounting Type | Surface Mount | — |
| Package / Case | 8-PowerSOIC (0.154", 3.90mm Width) | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the THS3112CDDA are grouped based on the following substitution criteria:
Primary Substitution Criteria:
- Amplifier topology: Current Feedback
- Circuit count: 2 circuits per package
- Package compatibility: 8-pin surface mount form factor (8-PowerSOIC or 8-SOIC)
- Supply voltage range: Minimum 10V to maximum 30V (dual supply operation)
- Operating temperature range: Minimum 0°C to maximum 70°C or broader
- RoHS3 compliance and MSL Level 1 rating
Acceptable Parameter Variations: Substitute parts may exhibit higher slew rates, increased bandwidth, improved input bias current specifications, and enhanced output current capability compared to the THS3112CDDA, provided all minimum electrical requirements are met and package pinout compatibility is maintained.
Grouping Logic:
- Group 1 (Manufacturer Recommended - Texas Instruments): THS3092DDAR provides enhanced performance specifications while maintaining identical supply voltage range and package form factor.
- Group 2 (Alternative Topology - Renesas Electronics): HA5023IBZ and HA5023IBZ96 offer current feedback amplification with different supply voltage architecture (±4.75V to ±18V) and reduced output current per channel.
- Group 3 (Alternative Manufacturer - Analog Devices): LT1229CS8#TRPBF provides current feedback amplification with extended minimum supply voltage (4V) and comparable performance metrics.
- Group 4 (General Purpose Alternative - Renesas Electronics): UPC1251G2-E1-A represents a general purpose amplifier topology with push-pull output configuration and extended temperature range.
Parameter Comparison
| Parameter | THS3112CDDA | THS3092DDAR | HA5023IBZ | HA5023IBZ96 | LT1229CS8#TRPBF | UPC1251G2-E1-A | Unit |
|---|---|---|---|---|---|---|---|
| Amplifier Type | Current Feedback | Current Feedback | Current Feedback | Current Feedback | Current Feedback | General Purpose | — |
| Number of Circuits | 2 | 2 | 2 | 2 | 2 | 2 | — |
| Slew Rate | 1550 | 5700 | 350 | 350 | 700 | — | V/µs |
| -3dB Bandwidth | 110 | 160 | 125 | 125 | 100 | — | MHz |
| Current - Input Bias | 330 | 4000 | — | — | 10000 | 14 | nA |
| Voltage - Input Offset | 3 | 0.9 | — | — | 3 | 2 | mV |
| Current - Supply (x2 Channels) | 4.9 | 9.5 | 7.5 | 7.5 | 6 | 0.7 | mA |
| Current - Output / Channel | 270 | 280 | 20 | 20 | 125 | 70 | mA |
| Voltage - Supply Span (Min) | 10 | 10 | ±4.75 | ±4.75 | 4 | 3 | V |
| Voltage - Supply Span (Max) | 30 | 30 | ±18 | ±18 | 30 | 30 | V |
| Operating Temperature | 0 to 70 | -40 to 85 | — | — | 0 to 70 | -40 to 85 | °C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | — |
| Package / Case | 8-PowerSOIC | 8-PowerSOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | — |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 | 1 | 1 | 1 | 1 | 1 | — |
Engineering Selection Recommendations
THS3092DDAR (Texas Instruments - Manufacturer Recommended)
The THS3092DDAR is the primary substitute for the THS3112CDDA. Both devices share identical supply voltage specifications (10V to 30V), package form factor (8-PowerSOIC), and current feedback amplifier topology. The THS3092DDAR provides enhanced performance with 5700V/µs slew rate and 160 MHz bandwidth compared to the THS3112CDDA. The THS3092DDAR operates across an extended temperature range (-40°C to 85°C) and maintains Active product status with 2240 units in stock. ROHS3 compliance and MSL Level 1 rating are maintained. This substitute is suitable for applications where improved slew rate and bandwidth performance are beneficial or required.
HA5023IBZ and HA5023IBZ96 (Renesas Electronics Corporation)
The HA5023IBZ and HA5023IBZ96 are functionally equivalent current feedback amplifiers with identical -3dB bandwidth (125 MHz) and slew rate (350V/µs) specifications. Both variants feature 2 circuits in 8-SOIC packages and maintain ROHS3 compliance and MSL Level 1 rating. The primary distinction is packaging format: HA5023IBZ is supplied in Tube packaging (1431 units in stock), while HA5023IBZ96 is supplied in Tape & Reel format (2532 units in stock). These devices operate with ±4.75V to ±18V dual supply voltage architecture, differing from the THS3112CDDA dual supply configuration. Output current per channel is reduced to 20 mA compared to 270 mA in the THS3112CDDA. Both variants maintain Active product status.
LT1229CS8#TRPBF (Analog Devices Inc.)
The LT1229CS8#TRPBF is a current feedback amplifier from the LT® series offering 700V/µs slew rate and 100 MHz bandwidth. This device operates with supply voltage range of 4V to 30V, providing extended minimum supply voltage capability compared to the THS3112CDDA. The LT1229CS8#TRPBF features 2 circuits in 8-SOIC package with identical operating temperature range (0°C to 70°C) and maintains ROHS3 compliance and MSL Level 1 rating. Output current per channel is 125 mA. The device maintains Active product status with 1450 units in stock.
UPC1251G2-E1-A (Renesas Electronics Corporation)
The UPC1251G2-E1-A represents a general purpose amplifier topology with push-pull output configuration, differing from the current feedback architecture of the THS3112CDDA. This device features 2 circuits in 8-SOIC package with extended temperature range (-40°C to 85°C) and supply voltage range (3V to 30V). The UPC1251G2-E1-A maintains ROHS3 compliance and MSL Level 1 rating with Active product status and 5911 units in stock. This substitute is applicable only when general purpose amplification topology is acceptable and push-pull output configuration is compatible with circuit requirements.
Frequently Asked Questions (FAQ)
Q: Can the THS3092DDAR directly replace the THS3112CDDA without circuit modifications?
A: The THS3092DDAR shares identical supply voltage range (10V to 30V), package form factor (8-PowerSOIC), and current feedback amplifier topology with 2 circuits. Pin-level compatibility is maintained. Enhanced performance specifications (higher slew rate and bandwidth) are backward compatible. No circuit modifications are required for direct substitution.
Q: What are the key differences between the HA5023IBZ and HA5023IBZ96?
A: The HA5023IBZ and HA5023IBZ96 are electrically identical current feedback amplifiers with identical electrical specifications. The primary difference is packaging format: HA5023IBZ is supplied in Tube packaging, while HA5023IBZ96 is supplied in Tape & Reel format. Selection between these variants depends on assembly process requirements and packaging preferences.
Q: Why does the HA5023IBZ have reduced output current (20 mA) compared to the THS3112CDDA (270 mA)?
A: The HA5023IBZ is designed for video amplification applications with different output current requirements. Applications requiring 270 mA output current per channel must use the THS3112CDDA, THS3092DDAR, or LT1229CS8#TRPBF. The HA5023IBZ is suitable only for applications with output current requirements of 20 mA or less per channel.
Q: Is the UPC1251G2-E1-A suitable as a substitute for the THS3112CDDA?
A: The UPC1251G2-E1-A is a general purpose amplifier with push-pull output configuration, differing from the current feedback topology of the THS3112CDDA. This device is suitable only when general purpose amplification topology is acceptable and push-pull output configuration is compatible with circuit requirements. Current feedback topology applications require the THS3092DDAR, HA5023IBZ variants, or LT1229CS8#TRPBF.
Q: What is the significance of the Last Time Buy status for the THS3112CDDA?
A: Last Time Buy status indicates that Texas Instruments has discontinued production of the THS3112CDDA. Current inventory of 995 units represents the final available stock. After inventory depletion, the THS3112CDDA will no longer be available for purchase. The THS3092DDAR is the manufacturer-recommended substitute for future designs and long-term component sourcing.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All substitute parts listed (THS3092DDAR, HA5023IBZ, HA5023IBZ96, LT1229CS8#TRPBF, and UPC1251G2-E1-A) maintain ROHS3 compliance status. All devices also maintain Moisture Sensitivity Level 1 (Unlimited) rating, indicating no special moisture handling requirements during storage or assembly.
Q: What is the difference between 8-PowerSOIC and 8-SOIC package formats?
A: The 8-PowerSOIC package includes an integrated thermal pad for enhanced heat dissipation, suitable for applications requiring higher power handling. The 8-SOIC package is a standard surface mount package without integrated thermal pad. Both packages maintain 0.154" (3.90mm) width and 8-pin configuration. The THS3112CDDA and THS3092DDAR use 8-PowerSOIC, while HA5023IBZ variants and LT1229CS8#TRPBF use standard 8-SOIC packages.
Q: Can the LT1229CS8#TRPBF operate with lower supply voltages than the THS3112CDDA?
A: Yes. The LT1229CS8#TRPBF supports minimum supply voltage of 4V compared to 10V minimum for the THS3112CDDA. Applications requiring operation below 10V supply voltage must use the LT1229CS8#TRPBF. Both devices support maximum supply voltage of 30V.
Q: What is the operating temperature range difference between substitute parts?
A: The THS3112CDDA and LT1229CS8#TRPBF operate across 0°C to 70°C. The THS3092DDAR and UPC1251G2-E1-A support extended temperature range of -40°C to 85°C. Applications requiring operation below 0°C or above 70°C must use THS3092DDAR or UPC1251G2-E1-A. Operating temperature range specifications must be verified against application requirements.
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