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Product Detailed Parameters
- Description：DIODE VAR CAP 30V 20MA SC-79
- Series：-
- Mfr：Infineon Technologies
- Package：Tape & Reel (TR)
- Capacitance @ Vr, F：2.9pF @ 28V, 1MHz
- Capacitance Ratio：23.2
- Capacitance Ratio Condition：C1/C28
- Voltage - Peak Reverse (Max)：30 V
- Diode Type：Single
- Q @ Vr, F：-
- Operating Temperature：-55°C ~ 150°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：SC-79, SOD-523
- Supplier Device Package：PG-SC79-2
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Overview
The BB 689-02V E7902 is a silicon tuning diode manufactured by Infineon Technologies, designed for VHF TV tuner applications. It features a single configuration within the SC79 surface-mount package and exhibits a series inductance of 0.6 nH. The device supports a maximum reverse voltage of 30 V and a peak reverse voltage of 35 V when the source resistance is less than or equal to 5 kΩ. Electrical characteristics include a typical capacitance of 51 pF at 1 V reverse bias and 1 MHz frequency, with a minimum capacitance ratio of 18 between 1 V and 28 V. The component operates reliably across an extended temperature range from -55°C to +150°C.
Feature Summary
- Very high capacitance ratio suitable for precise tuning requirements
- Low series resistance to minimize signal loss
- Excellent uniformity and matching due to in-line assembly procedure
Applications
- VHF TV tuners
Procurement Notes
Verify component authenticity through authorized distributors or official Infineon channels. Confirm RoHS compliance status and check for end-of-life notifications, as availability may be restricted. Ensure storage conditions adhere to specified limits to maintain performance integrity before installation.
Selection Notes
Select this component for designs requiring low series inductance and high capacitance ratios in VHF bands. Verify that the operating voltage does not exceed the 30 V reverse limit. Consider thermal management capabilities given the wide operating temperature range up to 150°C.
Part Context
This part belongs to the BB669/BB689 series of silicon tuning diodes. It shares core electrical specifications with variants like the BB689 but utilizes the SC79 package instead of SCD80 or SOD323. The series is characterized by low series resistance and high linearity for RF applications.
Replacement Considerations
Direct substitutes within the same family include the BB689 (SCD80 package) and BB669 (SOD323 package). Verify pinout compatibility and package dimensions before substitution.
