The BB157 is a variable capacitance diode produced by Philips. It is a high linearity, excellent matching, very small plastic SMD package diode with applications in electronic tuning and VCOs.
The Philips BB157 is a VHF variable capacitance diode fabricated in planar technology and encapsulated in a very small plastic SMD package (SOD323/SC-76). It features high linearity, excellent matching to 2% DMA, very low series resistance, and is designed for applications such as electronic tuning in VHF television tuners and voltage controlled oscillators (VCOs).
The document details the device's limiting values, such as a continuous reverse voltage of 30V and a storage temperature range of -55°C to +150°C. It also provides characteristic data including reverse current, series resistance, and capacitance ratios at various frequencies and reverse voltages.
| Continuous reverse voltage | 30 V |
|---|---|
| Peak reverse voltage | 35 V |
| Continuous forward current | 20 mA |
| Storage temperature | -55 to +150 °C |
| Operating junction temperature | -55 to +150 °C |
| Diode capacitance (typical) | 2.57 to 2.92 pF |
| Capacitance ratio | 11 to 14.85 |
| Capacitance matching | 2% |
| Package type | SOD323 (SC-76) |
The BB157 is used for electronic tuning in VHF television tuners and in voltage controlled oscillators (VCOs).
The device achieves excellent matching with a maximum deviation of 2% in a sequence of 15 diodes.
The maximum continuous reverse voltage is 30 V.