DH71004 is a high Q silicon abrupt junction tuning varactor, using a high temperature passivation process, suitable for low-cost medium and high volume markets, can provide tape and reel for automatic pick and place assembly on surface mount circuit boards.
This guide introduces TEMEX's silicon tuning varactors, including abrupt and hyperabrupt junction types offered in SOT23 and SOT143 surface‑mount packages. It describes the epitaxial mesa design, high‑temperature passivation, and the low‑cost, high‑volume production suitable for tape‑and‑reel assembly.
The document provides electrical characteristics such as reverse breakdown voltage, reverse current, operating temperature ranges, and Q factor, as well as a comprehensive table of part numbers (e.g., DH71010, DH76033, DH72045) with capacitance and merit values. Typical applications include VCOs, voltage‑tuned filters, phase shifters, and delay lines from HF up to microwave frequencies.
| Reverse breakdown voltage (30 V series) | 30 V min. |
|---|---|
| Operating junction temperature range | -55 °C to +125 °C |
| Storage temperature range | -65 °C to +150 °C |
| Reverse current | 200 nA @ 16 V |
| Maximum operating frequency | up to 3 GHz (HF‑to‑microwave) |
| Q factor | Highest Q factor (low reverse series resistance) |
The 30 V series has a reverse breakdown voltage of at least 30 V.
The varactors operate from –55 °C to +125 °C and can be stored from –65 °C to +150 °C.
The DH710 series is offered in SOT23 and SOT143 surface‑mount packages, with options for single or dual configurations and tape‑and‑reel supply.
Typical applications include VCOs, voltage‑tuned filters, phase shifters, and delay lines for HF to microwave frequencies.