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Product Detailed Parameters
- Description：SOT23 SINGLE LEAD FREE
- Series：-
- Mfr：Skyworks Solutions Inc.
- Package：Tape & Reel (TR),Tape & Reel (TR)
- Capacitance @ Vr, F：3.8pF @ 4.7V, 50MHz
- Capacitance Ratio：12.2
- Capacitance Ratio Condition：C0.3/C4.7
- Voltage - Peak Reverse (Max)：15 V
- Diode Type：Single
- Q @ Vr, F：400 @ 3V, 50MHz
- Operating Temperature：-55°C ~ 125°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3
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Overview
The SMV1251-001LF is a silicon hyperabrupt junction tuning varactor diode designed for low tuning voltage Voltage Controlled Oscillators (VCOs). It features a typical capacitance ratio of 12 from 0.3 V to 4.7 V. Key electrical specifications include a nominal capacitance of 42 pF at 0.3 V, a minimum reverse voltage of 15 V, and a maximum forward current of 20 mA. The device operates within a temperature range of -55 °C to +125 °C and is available in SOT-23 packages with an associated series inductance of 1.5 nH.
Feature Summary
- Hyperabrupt junction design optimized for high capacitance ratios in low voltage applications
- Suitable for battery-operated circuits requiring operation between 3 and 5 volts
- Available in industry-standard surface mount packages including SOT-23
Applications
- Low tuning voltage Voltage Controlled Oscillators (VCOs)
- High-volume commercial electronic systems
- Battery operated RF circuits
Procurement Notes
Verify the specific package marking code EH1 against the datasheet Table 1 to confirm the component identity. Ensure that the lead-free RoHS compliance status matches project requirements, as indicated by the LF suffix. Confirm the Moisture Sensitivity Level 1 rating aligns with assembly handling procedures.
Selection Notes
Select this component when a higher nominal capacitance around 42 pF is required compared to lower-capacitance variants in the SMV1247-SMV1255 series. Consider the 1.5 nH series inductance inherent to the SOT-23 package during circuit layout. Verify that the 15 V reverse voltage rating meets the maximum tuning voltage constraints of the target application.
Part Context
This part belongs to the Skyworks SMV1247-SMV1255 series of hyperabrupt junction tuning varactors. These devices are engineered specifically for applications where low tuning voltages are necessary, such as those powered by 3 to 5 volt batteries. The series offers various capacitance values across different package options to suit diverse RF design needs.
Replacement Considerations
SMV1251-079LF
FAQ
What is the typical capacitance ratio for the SMV1251-001LF?
The typical capacitance ratio (C0.3V/C4.7V) is 12.
What is the series inductance value for the SOT-23 package version?
The series inductance (LS) for the SOT-23 package is 1.5 nH.
What is the minimum reverse voltage rating for this device?
The minimum reverse voltage (VR) is 15 V.
