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 ADT1-1WT+ and ADT1-1+ are functionally equivalent RF transformer components sharing the same core electrical and mechanical characteristics, making the ADT1-1WT+ a viable replacement candidate for the ADT1-1+ in most applications. Designers should confirm application-specific requirements against the minor differences in operating temperature range and power handling before final qualification.
Impedance Ratio
High match
Frequency Range
High match
Operating Temperature
Validation required
Power Handling
Validation required
Parts at a glance
Part B
ADT1-1WT+
Circuits miniatures
- Lifecycle
- Active
- Stock
- 3904 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 | ADT1-1WT+ | ADT1-1+ | Why it matters |
|---|---|---|---|
| Impedance Ratio | 1:1 | 1:1 | Both are 1:1 transformers, so the impedance transformation is identical and they are functionally interchangeable in matching applications. |
| Frequency Range | 0.005 to 125 MHz | 0.15 to 400 MHz | The usable bandwidth differs significantly; the WT+ version extends to much lower frequencies while the standard version reaches higher upper frequencies, affecting which band the part can serve. |
| Insertion Loss (typ.) | ~0.6 dB (at midband) | ~0.6 dB (at midband) | Insertion loss directly impacts signal power through the transformer; comparable values indicate similar signal handling efficiency. |
| Power Rating | 0.25 W | 0.25 W | The maximum RF power handling is the same, so neither offers an advantage for high-power signal paths. |
| Package / Case | Surface mount, 6-lead (0.15 in.) | Surface mount, 6-lead (0.15 in.) | Identical footprint and package style allow drop-in PCB replacement without layout changes. |
| Operating Temperature Range | -40 to +85 °C | -40 to +85 °C | Matching temperature ratings mean both parts suit the same environmental conditions. |
| DC Current Rating | 30 mA | 30 mA | The DC current capability is the same, so biasing and DC feed-through behavior are equivalent. |
| Return Loss (typ.) | ~20 dB | ~20 dB | Good return loss indicates proper impedance matching; similar values mean comparable reflection performance in the passband. |
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 | ADT1-1+ | ADT1-1WT+ |
|---|---|---|
| Part Status | Active | Active |
| Frequency Range | 150kHz ~ 400MHz | 400kHz ~ 800MHz |
| Impedance - Unbalanced / Balanced | 50 / 50Ohm | 75 / 75Ohm |
| Phase Difference | 5° | 4° |
| Insertion Loss(Max) | 3dB | 3dB |
| Return Loss(Min) | 5.71dB | 9.75dB |
Frequently asked questions
What are the key differences between the ADT1-1WT+ and ADT1-1+ RF transformers?
Both are 1:1 transmission line transformers from Mini-Circuits, but the ADT1-1WT+ is specified for a wider operating frequency range (0.4 to 800 MHz) compared to the ADT1-1+ (0.15 to 400 MHz). The ADT1-1WT+ also offers a higher maximum input power rating and slightly different insertion loss characteristics across its band.
What is the operating frequency range of each transformer?
The ADT1-1WT+ operates from 0.4 MHz to 800 MHz, while the ADT1-1+ operates from 0.15 MHz to 400 MHz. The ADT1-1WT+ extends higher in frequency, whereas the ADT1-1+ reaches lower in frequency.
What is the impedance ratio of the ADT1-1WT+ and ADT1-1+?
Both transformers have a 1:1 impedance ratio (50 Ω to 50 Ω), making them suitable for impedance matching and isolation applications in 50 Ω systems.
What are the maximum input power ratings for these transformers?
The ADT1-1WT+ is rated for a maximum RF input power of 1 W (30 dBm) at 25°C, while the ADT1-1+ is rated for 0.25 W (24 dBm). The ADT1-1WT+ therefore handles higher power levels.
What package style do the ADT1-1WT+ and ADT1-1+ use?
Both transformers are supplied in Mini-Circuits' surface-mount package style (case style AT224-1), with a footprint of approximately 0.15 x 0.15 inches, allowing them to share a common PCB land pattern.
What is the typical insertion loss of each transformer?
The ADT1-1WT+ exhibits typical insertion loss of about 0.5 dB at mid-band and up to 1.0 dB at 800 MHz. The ADT1-1+ shows typical insertion loss of approximately 0.5 dB at mid-band and up to 1.0 dB at 400 MHz. Actual values should be confirmed on the manufacturer datasheet curves.
Can the ADT1-1WT+ be used as a drop-in replacement for the ADT1-1+?
Because both share the same package and 1:1 impedance ratio, the ADT1-1WT+ can generally replace the ADT1-1+ in designs operating within 0.4 to 400 MHz, provided the higher power rating and slightly different insertion loss are acceptable. Verify performance against the datasheet for the specific application band.
What are the typical applications for these 1:1 transformers?
Both are used for impedance matching, balun functions, and isolation in RF and IF circuits, including cable TV, cellular, and instrumentation designs. The ADT1-1WT+ is preferred where operation up to 800 MHz or higher power handling is required.