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Product Detailed Parameters
- Description：DIODE VARACTOR
- Series：-
- Mfr：Skyworks Solutions Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Capacitance @ Vr, F：4.8pF @ 4.7V, 50MHz
- Capacitance Ratio：12.3
- Capacitance Ratio Condition：C0.3/C4.7
- Voltage - Peak Reverse (Max)：15 V
- Diode Type：Single
- Q @ Vr, F：350 @ 3V, 50MHz
- Operating Temperature：-55°C ~ 125°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：0402 (1005 Metric)
- Supplier Device Package：402
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Overview
The SMV1253-040LF is a silicon hyperabrupt junction tuning varactor diode from the Skyworks SMV1247-SMV1255 series, designed for low tuning voltage Voltage Controlled Oscillator (VCO) applications. It utilizes an SMD/SMT SC-79 package with a single configuration and an inductance of 0.7 nH. The device operates within a temperature range of -55°C to +125°C. Key electrical specifications include a maximum reverse voltage of 15 V and a forward current rating of 20 mA. At 0.3 V, the typical capacitance is 53 pF, decreasing to 4.80 pF at 4.7 V, yielding a typical capacitance ratio of 12.3.
Feature Summary
- Hyperabrupt junction design optimized for high capacitance ratios
- Engineered for low tuning voltage operation in VCOs
- Characterized for capacitance and resistance over temperature
Applications
- Low tuning voltage Voltage Controlled Oscillators (VCOs)
- High-volume commercial systems
Procurement Notes
Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status via the official Certificate of Conformance. Ensure handling procedures adhere to industry-standard electrostatic discharge precautions during storage and assembly.
Selection Notes
Select this component based on required capacitance values and operating frequency ranges. Verify that the SC-79 package dimensions align with the target PCB layout. Ensure the circuit design accommodates the specified maximum reverse voltage and forward current limits.
Part Context
This part belongs to the SMV1247-SMV1255 family of silicon hyperabrupt junction varactor diodes manufactured by Skyworks Solutions, Inc. The series provides multiple package options including SOT-23, SOD-323, SC-70, and SC-79. These components are characterized for performance across varying temperatures and include available SPICE models for simulation.
Replacement Considerations
SMV1253-079LF
FAQ
What is the typical capacitance ratio for the SMV1253-040LF?
The typical capacitance ratio (CT @ 0.3 V / CT @ 4.7 V) is 12.3.
What is the package marking code for the SMV1253-040LF?
The marking code for the SMV1253-040LF is '3'.
What is the series resistance value at 3 V and 500 MHz?
The typical series resistance at 3 V and 500 MHz is 1.4 Ω.
