Part A
ADT1-6T+
Circuits miniatures
- Lifecycle
- Active
- Stock
- 1972 PCS
- Package
- 6-SMD, Flat Leads
- Series
- Barron
Replacement verdict
Compatible functional replacement candidate
The ADT1-6T+ is a viable functional replacement candidate for the ADT1-1+ in RF signal-chain designs, sharing the same 1:1 transmission-line transformer topology and surface-mount package family. However, the wider operating bandwidth and different impedance transformation characteristics of the ADT1-6T+ require validation of return loss, insertion loss, and amplitude/phase balance across the target frequency band before committing to production substitution.
Impedance Ratio
High match
Package Type
High match
Frequency Bandwidth
Validation required
Insertion Loss
Validation required
Parts at a glance
Part B
ADT1-1+
Circuits miniatures
- Lifecycle
- Active
- Stock
- 3365 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 | ADT1-1+ | ADT1-6T+ | Why it matters |
|---|---|---|---|
| Frequency Range (Min) | 0.5 MHz | 0.07 MHz | Defines the lowest frequency the transformer can operate at; the ADT1-6T+ extends much lower for LF applications. |
| Frequency Range (Max) | 500 MHz | 300 MHz | Sets the upper usable frequency; ADT1-1+ covers higher RF bands while ADT1-6T+ trades bandwidth for lower-frequency performance. |
| Impedance Ratio | 1:1 | 1:6 | Determines the transformation between source and load impedance; these parts are not directly substitutable for impedance matching. |
| Insertion Loss (Typical) | ~0.3 dB (mid-band) | ~0.5 dB (mid-band) | Lower insertion loss means less signal attenuation through the transformer, affecting overall system loss budget. |
| Package / Case | Surface-mount (AT224 style) | Surface-mount (AT224 style) | Footprint compatibility affects PCB layout; both share a similar SMT form factor but differ in electrical characteristics. |
| Operating Temperature Range | -20°C to +85°C | -20°C to +85°C | Confirms both parts suit similar environmental conditions for commercial-grade applications. |
| DC Current Rating | 30 mA | 30 mA | Indicates maximum DC bias current through the winding; equal ratings mean similar current-handling capability. |
| Return Loss (Typical) | ~20 dB (mid-band) | ~15 dB (mid-band) | Better return loss indicates improved impedance match and lower reflections in the signal path. |
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 | ADT1-6T+ | ADT1-1+ |
|---|---|---|
| Part Status | Active | Active |
| Frequency Range | 30kHz ~ 125MHz | 150kHz ~ 400MHz |
| Impedance - Unbalanced / Balanced | 50 / 50Ohm | 50 / 50Ohm |
| Phase Difference | 1° | 5° |
| Insertion Loss(Max) | 3dB | 3dB |
| Return Loss(Min) | 7.66dB | 5.71dB |
Frequently asked questions
What are the primary differences between the ADT1-1+ and ADT1-6T+?
The ADT1-1+ and ADT1-6T+ are both Mini-Circuits RF transformers, but they differ in their impedance ratio and bandwidth. The ADT1-1+ is a 1:1 transmission line transformer, while the ADT1-6T+ is a 1:6 impedance ratio transformer. Their frequency ranges, insertion loss, and application suitability differ accordingly.
What is the impedance ratio of each transformer?
The ADT1-1+ has a 1:1 impedance ratio (50Ω to 50Ω), while the ADT1-6T+ has a 1:6 impedance ratio (50Ω to 300Ω). This is a fundamental difference that determines their respective applications.
What frequency range does each transformer support?
The ADT1-1+ operates over a frequency range of 0.5 to 500 MHz. The ADT1-6T+ operates over a frequency range of 0.5 to 300 MHz. The ADT1-1+ offers a wider upper frequency limit.
Are the ADT1-1+ and ADT1-6T+ pin-compatible?
Both transformers are housed in Mini-Circuits' standard surface-mount package (typically 0.25" x 0.31" x 0.16"), but their pin configurations and internal connections differ due to the different impedance ratios. They should not be treated as drop-in replacements without verifying the pinout and circuit requirements against the respective datasheets.
What are the typical applications for each transformer?
The ADT1-1+ is typically used for impedance matching, DC isolation, and balanced-to-unbalanced conversion in 50Ω systems. The ADT1-6T+ is used for impedance transformation from 50Ω to 300Ω, commonly in applications such as matching to high-impedance loads, balanced mixers, and antenna systems.
What is the insertion loss of each transformer?
The ADT1-1+ typically exhibits insertion loss of approximately 0.5 dB to 1.0 dB across its frequency range. The ADT1-6T+ typically exhibits insertion loss of approximately 1.0 dB to 2.0 dB across its frequency range. Exact values should be verified from the respective Mini-Circuits datasheets.
Can the ADT1-1+ and ADT1-6T+ be used interchangeably?
No. Because they have different impedance ratios (1:1 vs. 1:6), different frequency ranges, and different insertion loss characteristics, they are not interchangeable. Substitution requires careful evaluation of the impedance matching requirements, frequency of operation, and circuit topology.