Part A
ADT1-1+
Circuits miniatures
- Lifecycle
- Active
- Stock
- 3365 PCS
- Package
- 6-SMD, Flat Leads
- Series
- Barron
Replacement verdict
Compatible functional replacement candidate
The ADT1.5-122+ and ADT1-1+ are both wideband RF transformers in the same surface-mount package family, but they differ in impedance ratio and bandwidth. The ADT1.5-122+ offers a 1.5:1 impedance ratio with coverage from 0.5 to 1200 MHz, while the ADT1-1+ provides a 1:1 impedance ratio over 0.4 to 500 MHz. Because the impedance transformation ratio is not interchangeable in most matching networks, the ADT1.5-122+ is not a direct drop-in substitute for the ADT1-1+; substitution requires revalidation of the surrounding RF matching and return-loss performance.
Impedance Ratio
Not compatible
Frequency Range
Validation required
Package Type
High match
Insertion Loss
Validation required
Parts at a glance
Part B
ADT1.5-122+
Circuits miniatures
- Lifecycle
- Active
- Stock
- 7274 PCS
- Package
- 6-SMD, Flat Leads
- Series
- Barron
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADT1.5-122+ | ADT1-1+ | Why it matters |
|---|---|---|---|
| Impedance Ratio | 1.5:1 | 1:1 | Determines the transformation ratio between input and output; a 1.5:1 vs 1:1 ratio changes matching behavior and is not directly substitutable. |
| Frequency Range | 0.5 to 1200 MHz | 0.5 to 1000 MHz | Defines the usable bandwidth; the wider upper frequency limit of the ADT1.5-122+ affects high-frequency applications. |
| Insertion Loss (typ.) | ~1.0 dB | ~0.6 dB | Lower insertion loss means less signal attenuation; the ADT1-1+ offers lower loss in its band. |
| Return Loss (typ.) | ~14 dB | ~20 dB | Higher return loss indicates better impedance matching; the ADT1-1+ provides better matching in its specified band. |
| Maximum Input Power | 0.25 W | 0.25 W | Sets the power handling limit; both share the same rating, so power capability is not a differentiator. |
| Package / Case | 6-lead SMD (0.16 x 0.16 in) | 6-lead SMD (0.16 x 0.16 in) | Footprint compatibility affects PCB layout; identical packages allow drop-in replacement mechanically. |
| Operating Temperature Range | -40 to +85 °C | -40 to +85 °C | Defines environmental limits; identical ranges mean equivalent thermal robustness. |
| DC Current Rating | 30 mA | 30 mA | Limits DC bias through the transformer windings; equal ratings mean similar DC handling. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADT1-1+ | ADT1.5-122+ |
|---|---|---|
| Part Status | Active | Active |
| Frequency Range | 150kHz ~ 400MHz | 20MHz ~ 1.2GHz |
| Impedance - Unbalanced / Balanced | 50 / 50Ohm | 1:1.5 |
| Phase Difference | 5° | 1.2° |
| Insertion Loss(Max) | 3dB | 2.0dB |
| Return Loss(Min) | 5.71dB | 11.92dB |
Frequently asked questions
What are the key differences between the ADT1.5-122+ and ADT1-1+ RF transformers?
The ADT1.5-122+ and ADT1-1+ are both Mini-Circuits surface-mount RF transformers, but they differ in impedance ratio and frequency range. The ADT1.5-122+ is a 1.5:1 impedance-ratio transformer, while the ADT1-1+ is a 1:1 impedance-ratio transformer. Their bandwidth, insertion loss, and application suitability differ accordingly, so each should be selected based on the specific impedance matching and frequency requirements of the design.
What is the impedance ratio of each transformer?
The ADT1.5-122+ provides a 1.5:1 impedance ratio, and the ADT1-1+ provides a 1:1 impedance ratio. The impedance ratio determines how the transformer matches source and load impedances in RF circuits.
Are the ADT1.5-122+ and ADT1-1+ interchangeable in a circuit design?
They are not directly interchangeable without design validation. Because the ADT1.5-122+ has a 1.5:1 impedance ratio and the ADT1-1+ has a 1:1 ratio, substituting one for the other changes the impedance transformation and can affect matching, insertion loss, and return loss. The designer must verify compatibility against the Mini-Circuits datasheets for the target frequency band and circuit conditions.
What package style do the ADT1.5-122+ and ADT1-1+ use?
Both the ADT1.5-122+ and ADT1-1+ are offered by Mini-Circuits in surface-mount packages. Designers should confirm the exact package dimensions, pin configuration, and PCB land pattern from the respective Mini-Circuits datasheets before layout, since package details must match the board footprint.
In what frequency range are these transformers typically used?
Both the ADT1.5-122+ and ADT1-1+ are RF transformers intended for RF signal processing and impedance matching. The usable frequency range for each part is specified in its Mini-Circuits datasheet, and the designer should confirm the operating band, insertion loss, and return loss over the intended frequency range before selecting a part.
Which transformer should be chosen for 1:1 impedance matching applications?
For applications requiring a 1:1 impedance ratio, the ADT1-1+ is the appropriate choice, since it is specified as a 1:1 impedance-ratio transformer. The ADT1.5-122+ should be used where a 1.5:1 impedance transformation is required. Final selection should be confirmed against the Mini-Circuits datasheets for the specific frequency and power conditions.
Do both transformers support the same power handling and DC current ratings?
Power handling and DC current ratings are part-specific parameters. The designer must consult the Mini-Circuits datasheets for the ADT1.5-122+ and ADT1-1+ to confirm RF power handling and any DC current capability for the intended application. These ratings should not be assumed to be identical between the two parts.