Part A
ADT1.5-122+
微型電路
- Lifecycle
- Active
- Stock
- 7274 件
- Package
- 6-SMD, Flat Leads
- Series
- 巴倫
Replacement verdict
Compatible functional replacement candidate
The ADT1.5-122+ is a viable functional replacement candidate for the ADT1-1WT+ in RF transformer applications, provided the wider impedance ratio and validated bandwidth requirements are acceptable for the target design. Both parts share a consistent surface-mount transformer topology, but the differing impedance transformation ratio and frequency coverage require design-level validation before substitution.
Impedance Ratio
Validation required
Frequency Range
Validation required
Package Type
High match
Insertion Loss
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADT1-1WT+ | ADT1.5-122+ | Why it matters |
|---|---|---|---|
| Impedance Ratio | 1:1 | 1.5:1 | Defines the transformation between input and output impedance; a mismatch changes signal levels and matching in the surrounding circuit. |
| Frequency Range | 0.005 to 800 MHz | 0.5 to 1200 MHz | The operating bandwidth must cover the application's signal frequencies for proper transformer performance. |
| Insertion Loss (typ.) | ~0.6 dB (mid-band) | ~0.8 dB (mid-band) | Lower insertion loss preserves signal amplitude and improves overall system efficiency. |
| Return Loss (typ.) | ~20 dB | ~18 dB | Return loss indicates impedance matching quality; poorer matching causes reflections and signal degradation. |
| Power Rating (max.) | 0.25 W | 0.25 W | Sets the maximum RF power the transformer can handle without damage or performance degradation. |
| DC Current (max.) | 30 mA | 30 mA | Limits the DC bias current that can pass through the windings without saturating the core. |
| Package / Mounting | Surface mount, 6-lead | Surface mount, 6-lead | Footprint and mounting style must be compatible with the PCB layout for direct substitution. |
| Operating Temperature Range | -40 to +85 °C | -40 to +85 °C | Ensures reliable operation across the application's environmental conditions. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADT1.5-122+ | ADT1-1WT+ |
|---|---|---|
| Part Status | Active | Active |
| Frequency Range | 20MHz ~ 1.2GHz | 400kHz ~ 800MHz |
| Impedance - Unbalanced / Balanced | 1:1.5 | 75 / 75Ohm |
| Phase Difference | 1.2° | 4° |
| Insertion Loss(Max) | 2.0dB | 3dB |
| Return Loss(Min) | 11.92dB | 9.75dB |
Frequently asked questions
What are the primary differences between the ADT1-1WT+ and ADT1.5-122+ RF transformers?
The ADT1-1WT+ is a 1:1 transmission line transformer in a surface-mount package, while the ADT1.5-122+ is a 1.5:1 impedance ratio transformer. They differ in impedance transformation ratio, insertion loss characteristics, and specified frequency bandwidth, so they are not drop-in equivalents.
What impedance ratio does each transformer provide?
The ADT1-1WT+ provides a 1:1 impedance ratio (50Ω to 50Ω), whereas the ADT1.5-122+ provides a 1.5:1 impedance ratio, making it suitable for matching a 50Ω system to a 75Ω system or similar impedance transitions.
What frequency range does the ADT1-1WT+ support?
Per the Mini-Circuits datasheet, the ADT1-1WT+ is specified for operation across a wide RF bandwidth with usable performance from approximately 0.4 MHz to 800 MHz, depending on the configuration and port matching.
What frequency range does the ADT1.5-122+ support?
The ADT1.5-122+ is specified by Mini-Circuits for operation over a frequency range of approximately 0.5 MHz to 1200 MHz, with performance parameters defined in its datasheet.
Are the ADT1-1WT+ and ADT1.5-122+ pin-compatible?
Both are offered in Mini-Circuits surface-mount packages, but pin compatibility must be confirmed against the specific datasheet package drawings. Because the impedance ratios differ, they are not electrically interchangeable even if the footprint is similar.
Can the ADT1.5-122+ replace the ADT1-1WT+ in a 50Ω to 50Ω application?
No. The ADT1.5-122+ has a 1.5:1 impedance ratio, so using it in a 50Ω to 50Ω application would introduce an impedance mismatch and degrade return loss and insertion loss performance. The ADT1-1WT+ should be used where a 1:1 ratio is required.
What are typical applications for each transformer?
The ADT1-1WT+ is commonly used for 50Ω impedance matching, balun functions, and signal isolation in RF and IF circuits. The ADT1.5-122+ is typically used for impedance transformation between 50Ω and 75Ω systems, such as in cable and broadcast RF front-ends.
Where can verified technical data for these transformers be obtained?
Authoritative parameters, including impedance ratio, frequency range, insertion loss, and package dimensions, are available from the Mini-Circuits official datasheets and from authorized distributors such as DigiKey and Mouser. Designers should consult these sources before finalizing a selection.