BB644 /BB664 is a high-quality variable capacitance diode produced by Diodes Inc. for VHF TV tuners. The product has the characteristics of high capacitance ratio, low series inductance and low series resistance.
This datasheet provides the electrical characteristics and maximum ratings for Infineon's BB644 and BB664 silicon variable capacitance diodes, which are intended for VHF TV tuners. Key features include high capacitance ratio, low series inductance and resistance, and excellent uniformity due to an in‑line matching assembly.
The document lists reverse voltage, forward current, temperature ranges, capacitance values at various bias conditions, and series resistance, enabling designers to select the appropriate diode for their applications.
| Reverse voltage (VR) | 30 V |
|---|---|
| Peak reverse voltage (Vem) | 35 V |
| Forward current (Ir) | 20 mA |
| Operating temperature range | -55 °C to 150 °C |
| Storage temperature range | -55 °C to 150 °C |
| Series resistance (Rs) | 0.75 Ω |
| Diode capacitance at 1 V, 1 MHz | 39 pF |
| Capacitance ratio (Cr/Ct) | 15 |
The diodes are rated for a maximum reverse voltage of 30 V.
They can handle a forward current of up to 20 mA.
They operate from –55 °C up to 150 °C.
The capacitance is 39 pF under those conditions.