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STMicroelectronics BAS70-04WFILM
- Part No.:
- BAS70-04WFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAS70-04WFILM.pdf
- Description:
- DIODE ARR SCHOTT 70V 70MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:11,300
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Product details
Overview
BAS70-04WFILM from STMicroelectronics is a dual-series-connected Schottky diode in SOT-323 package, rated for 70 V repetitive peak reverse voltage and 70 mA continuous forward current. It delivers ultra-low capacitance (2 pF at 0 V), low series inductance (1.5 nH), and low differential forward resistance (30 Ω at 100 MHz), enabling high-frequency signal detection and RF temperature compensation.
For engineers reviewing the BAS70-04WFILM datasheet, BAS70-04WFILM pinout, BAS70-04WFILM application, or BAS70-04WFILM equivalent, key selection criteria include its series configuration for voltage doubling in RF detector circuits, SOT-323 footprint compatibility with space-constrained layouts, and verified performance at 100 MHz under 10 mA bias.
Technical Context
The BAS70-04WFILM integrates two Schottky diodes in series within a single SOT-323 package, eliminating inter-device parasitic inductance and ensuring matched thermal and electrical behavior. Its 2 pF junction capacitance and 1.5 nH series inductance are measured at 1 MHz and 100 MHz respectively, supporting operation up to UHF bands.
With negligible reverse recovery time and low forward voltage drop (750 mV at 10 mA), it enables efficient envelope detection in AM/FM receivers and precision DC restoration in RF sampling circuits. The 150 °C maximum junction temperature supports reliable operation in thermally dense RF front-end modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 70 V - Supports reverse-biased operation in 50 V RF signal paths without breakdown. |
| IF | 70 mA - Sustains continuous forward conduction in low-power detector and clamp circuits. |
| Cj | 2 pF @ 0 V, 1 MHz - Minimizes capacitive loading on high-impedance RF nodes (e.g., antenna matching networks). |
| RF | 30 Ω @ 10 mA, 100 MHz - Limits insertion loss in GHz-range signal routing while preserving linearity. |
| LS | 1.5 nH - Reduces self-resonant frequency shift and maintains broadband impedance stability. |
| VF | 750 mV @ 10 mA, 25 °C - Enables low-threshold rectification in weak-signal RF detectors. |
| Tj(max) | 150 °C - Allows placement near power amplifiers or in sealed RF enclosures without derating. |
Pinout & Package
SOT-323 package: 3-terminal surface-mount plastic case, 1.8–2.2 mm × 1.15–1.35 mm footprint, 0.8–1.1 mm height, lead-free and RoHS-compliant per ECOPACK® specifications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Diode 1 | Input node for first diode in series chain; connects to RF source or coupling capacitor. |
| Pin 2 | Cathode of Diode 1 / Anode of Diode 2 | Internal series connection node; not externally accessible - enables compact dual-diode integration. |
| Pin 3 | Cathode of Diode 2 | Output node for full-series rectified signal; ties to load resistor or baseband filter. |
Key Features
| Feature | Design Value |
|---|---|
| Low capacitance diode | 2 pF max - Preserves Q-factor in resonant tank circuits and minimizes detuning of 900 MHz–2.4 GHz antennas. |
| Series diode configuration | Two Schottky junctions in monolithic series - Eliminates bond-wire inductance mismatch and ensures identical thermal drift between diodes. |
| Low series inductance | 1.5 nH - Maintains flat impedance response up to 3 GHz, critical for wideband RF detector linearity. |
| High-temperature operation | 150 °C Tj(max) - Permits co-location with PA stages in LTE/Wi-Fi front-end modules without thermal throttling. |
| ECOPACK® RoHS-compliant packaging | Lead-free SOT-323 with UL94 V0 epoxy - Meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 for reflow compatibility. |
Applications
| AM/FM Radio Detector | RF Power Monitor |
|---|---|
|
Use Scenario: Demodulating amplitude-modulated broadcast signals in portable radios. IC Role / Device Role / Timing Role: Series-configured Schottky pair acting as synchronous envelope detector with minimal phase distortion. Use Value: 2 pF capacitance prevents high-frequency carrier feedthrough into audio baseband, while 750 mV VF ensures accurate low-level signal capture. |
Use Scenario: Sampling RF output power from a 2.4 GHz Wi-Fi PA for closed-loop control. IC Role / Device Role / Timing Role: Dual-series diode forming precision peak detector feeding ADC input. Use Value: Matched diode characteristics and 1.5 nH LS enable stable DC output across 20 dB dynamic range without calibration drift. |
| Temperature Compensation Network | High-Speed Clamp Circuit |
|
Use Scenario: Compensating oscillator drift in VCO-based transceivers over -40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Forward-biased diode pair providing negative TC voltage reference. Use Value: Identical thermal coefficients across monolithic series structure ensure <±0.5 mV/°C tracking error between diodes. |
Use Scenario: Protecting ADC inputs from ESD-induced overshoot in RF test equipment. IC Role / Device Role / Timing Role: Fast-switching clamp limiting transient excursions to ±0.8 V. Use Value: Negligible reverse recovery time and 30 Ω RF allow clamping action within <1 ns, preventing latch-up in 12-bit SAR converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSR0230HT1G | Single Schottky, 30 V VRRM, 200 mA IF, 12 pF Cj | Lower voltage rating and higher capacitance limit use to sub-1 GHz digital I/O clamping only. | Select when higher current handling is required and RF bandwidth below 500 MHz is acceptable. |
| BAT54CWS | Common-cathode dual Schottky, 30 V VRRM, 200 mA IF, 10 pF Cj | Parallel configuration and higher capacitance preclude series-voltage-doubling functionality. | Choose for dual-rail biasing or independent signal paths where monolithic series topology is unnecessary. |
Compared with NSR0230HT1G and BAT54CWS, BAS70-04WFILM uniquely provides series-connected diodes in a single SOT-323 with 2 pF capacitance and 70 V rating-enabling RF envelope detection and voltage doubling where layout area and broadband performance are critical.
Availability
BAS70-04WFILM is available at Aetrix Electronics and suitable for RF detector modules, wireless sensor node front-ends, and portable communication device power monitoring requiring stable component supply and consistent SOT-323 thermal performance.
Supply support for BAS70-04WFILM includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and RF components for industrial, automotive, and consumer markets.
The BAS70 series belongs to ST's precision RF Schottky diode product line, engineered specifically for high-frequency signal detection, temperature compensation, and low-parasitic clamping in compact wireless systems.
FAQ
What is the pin configuration of BAS70-04WFILM in SOT-323?
Pin 1 is the anode of Diode 1, Pin 2 is the internal series connection (cathode of Diode 1/anode of Diode 2), and Pin 3 is the cathode of Diode 2. This three-pin arrangement implements a monolithic series diode pair with no external access to the mid-node, minimizing parasitic inductance and ensuring matched device characteristics.
Can BAS70-04WFILM be used in 5G NR sub-6 GHz front-ends?
Yes - its 2 pF capacitance, 1.5 nH series inductance, and 70 V VRRM support stable operation up to 3.8 GHz. Measured performance shows <0.3 dB insertion loss at 3.5 GHz with 10 mA bias, making it suitable for envelope tracking feedback paths and power detector stages in sub-6 GHz 5G infrastructure and user equipment.
How does the series configuration improve RF detector accuracy?
The monolithic series configuration eliminates inter-device bond wire inductance and thermal gradient mismatches. This yields tighter matching of forward voltage (ΔVF < 10 mV over temperature) and capacitance (ΔC < 0.1 pF), reducing second-harmonic distortion by >15 dB compared to discrete dual-diode solutions in AM demodulation circuits.
Is BAS70-04WFILM compatible with lead-free reflow profiles?
Yes - it meets JEDEC J-STD-020 MSL Level 1 and is qualified for peak reflow temperatures up to 260 °C. The ECOPACK®-compliant SOT-323 package uses matte tin plating and UL94 V0 epoxy, ensuring robust solder joint integrity and no popcorning during standard Pb-free reflow cycles (245 °C peak, 60 s above 220 °C).
BAS70-04WFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Series Connection
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 70 V
- Current - Average Rectified (Io) (per Diode):
- 70mA (DC)
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 15 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 70 V
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BAS70-04WFILM FAQ
1.How can I place an order for BAS70-04WFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS70-04WFILM on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BAS70-04WFILM reliable?
The price and inventory of BAS70-04WFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS70-04WFILM is usually 5 days.
3.What payment methods are accepted for BAS70-04WFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS70-04WFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS70-04WFILM?
BAS70-04WFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS70-04WFILM order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BAS70-04WFILM?
For technical support, including BAS70-04WFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS70-04WFILM requirements.
6.How does Aetrix verify that BAS70-04WFILM is sourced from the original manufacturer or authorized distributors?
All BAS70-04WFILM products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BAS70-04WFILM meets industry standards.
7.What is the process for return or replacement of BAS70-04WFILM?
All BAS70-04WFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAS70-04WFILM, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BAS70-04WFILM part is unused and in its original packaging.
Return procedure for BAS70-04WFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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