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STMicroelectronics BAS70ZFILM
- Part No.:
- BAS70ZFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
BAS70ZFILM.pdf
- Description:
- DIODE SCHOTTKY 70V 70MA SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,537
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Product details
Overview
BAS70ZFILM from STMicroelectronics is a 70 V, 70 mA low-capacitance Schottky diode in SOD-123 package, optimized for RF signal detection and temperature compensation circuits. It delivers 2 pF junction capacitance at 0 V, 30 Ω differential forward resistance at 100 MHz, and 1.5 nH series inductance - enabling high-frequency performance in compact wireless front-ends.
For engineers reviewing the BAS70ZFILM datasheet, BAS70ZFILM pinout, BAS70ZFILM application, or BAS70ZFILM equivalent, key selection criteria include low Cj for minimal signal loading, ultra-low RF for efficient RF rectification, and thermal robustness up to 150 °C junction temperature in space-constrained RF modules.
Technical Context
The BAS70ZFILM employs a planar Schottky barrier structure with low series inductance (1.5 nH) and resistance (30 Ω @ 100 MHz), minimizing insertion loss and phase distortion in RF detector paths. Its 2 pF capacitance at 0 V reverse bias ensures minimal detuning of matching networks across UHF bands.
Designed for operation up to 150 °C junction temperature, it maintains stable leakage current (<10 µA at 70 V, Tj = 25 °C) and forward voltage (750 mV @ 10 mA) under thermal stress - critical for uncooled RF sensor nodes and automotive telematics antennas.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 70 V - supports RF detector operation in 48 V telecom and 60 V automotive supply rails without breakdown risk |
| IF | 70 mA continuous - sufficient for low-power envelope detection and bias feed applications |
| Cj | 2 pF at 0 V - enables broadband impedance matching in 800 MHz–2.4 GHz antenna couplers |
| RF | 30 Ω at 100 MHz - minimizes conversion loss in passive RF detectors and mixer LO injection paths |
| LS | 1.5 nH - reduces self-resonant frequency degradation, preserving detector linearity above 1 GHz |
| VF | 750 mV at 10 mA - ensures reliable turn-on margin for weak-signal demodulation in GPS/GNSS front-ends |
| Tj(max) | 150 °C - allows direct placement near power amplifiers or in sealed RF enclosures without derating |
Pinout & Package
Package: SOD-123 - surface-mount plastic case with 2.55–2.85 mm length, 1.4–1.7 mm width, and 3.55–3.95 mm height; UL94 V0 rated, lead-free, ECOPACK® compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to RF input or bias source; low RF ensures minimal voltage drop during conduction |
| Cathode | Forward current exit / reverse blocking terminal | Grounded or tied to DC reference; low Cj prevents RF shunting to ground |
Key Features
| Feature | Design Value |
|---|---|
| Low junction capacitance | 2 pF at 0 V - preserves Q-factor in resonant RF circuits and avoids detuning of matching networks |
| Negligible switching losses | No minority-carrier storage - enables clean zero-crossing detection in high-speed envelope tracking |
| Low series inductance | 1.5 nH - maintains broadband response up to 3 GHz without parasitic resonance |
| Thermal robustness | 150 °C max junction temperature - supports operation adjacent to PA stages in LTE/5G modules |
| Surface-mount compatibility | SOD-123 footprint - fits automated assembly in miniaturized IoT sensor PCBs with <2.0 mm² board area |
Applications
| RF Signal Detector | Temperature Compensation Circuit |
|---|---|
Use Scenario: Demodulating AM/FM signals in compact wireless receivers (e.g., Bluetooth LE beacons, sub-GHz ISM sensors). IC Role / Device Role / Timing Role: Passive RF detector diode converting RF envelope to baseband DC voltage. Use Value: 2 pF Cj and 30 Ω RF minimize signal attenuation and harmonic distortion below –20 dBm input levels. |
Use Scenario: Compensating oscillator drift in VCO-based transceivers operating from –40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Forward-biased reference diode providing predictable VF vs. Tj slope for analog compensation networks. Use Value: Stable 750 mV VF @ 10 mA with <±0.5 mV/°C drift enables ±0.1 ppm frequency stability in TCXO designs. |
| Antenna Coupler Interface | Low-Power Bias Feed Network |
Use Scenario: Sampling forward/reflected power in directional couplers for antenna tuning in smartphone front-end modules. IC Role / Device Role / Timing Role: High-frequency sampling diode in coupled port path of microstrip couplers. Use Value: 1.5 nH LS and 2 pF Cj maintain flat coupling response from 700 MHz to 2.7 GHz without notch formation. |
Use Scenario: Injecting DC bias into RF amplifier input while blocking RF leakage in GaN/LDMOS driver stages. IC Role / Device Role / Timing Role: Series-blocking diode in bias tee topology, isolating DC source from RF path. Use Value: 70 V VRRM withstands transient RF peaks >30 dBm; 10 µA IR at 70 V ensures minimal DC load error. |
Availability
BAS70ZFILM is available at Aetrix Electronics and suitable for RF signal detection, temperature compensation, antenna coupler interfaces, and low-power bias feed networks requiring stable component supply across production volumes.
Supply support for BAS70ZFILM 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 silicon solutions for automotive, industrial, and consumer markets since 1987.
The BAS70 series belongs to ST's precision RF discrete portfolio, engineered specifically for high-frequency signal integrity in compact wireless infrastructure, IoT sensors, and automotive connectivity modules.
FAQ
What is the maximum reverse voltage rating for BAS70ZFILM?
The BAS70ZFILM has a repetitive peak reverse voltage (VRRM) of 70 V, verified per Table 2 of STMicroelectronics' Doc ID 12563 Rev 2. This rating applies at Tj = 25 °C and defines the maximum sustained DC or sinusoidal AC reverse bias the device can block without breakdown.
Does BAS70ZFILM have a specified junction-to-ambient thermal resistance?
Yes - for the SOD-123 package on an epoxy PCB with recommended pad layout, Rth(j-a) is 500 °C/W, as listed in Table 3. This value assumes standard JEDEC test conditions and is used to calculate junction temperature rise under steady-state power dissipation.
How does BAS70ZFILM compare to BAS70FILM in terms of package and RF performance?
BAS70ZFILM uses SOD-123 packaging (larger footprint, higher thermal mass), while BAS70FILM uses SOT-23. Both share identical electrical specs (70 V VRRM, 2 pF Cj, 30 Ω RF), but SOD-123 offers 500 °C/W Rth(j-a) versus 500 °C/W for SOT-23 - making ZFILM preferable for thermally constrained RF detector placements.
Is BAS70ZFILM suitable for use in automotive-grade applications?
BAS70ZFILM is not qualified to AEC-Q101 and lacks automotive-specific qualification data in its datasheet. While it operates up to 150 °C junction temperature, ST explicitly states non-automotive-grade parts are used in automotive systems at the user's own risk - design validation per ISO/TS 16949 is required.
BAS70ZFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 70 V
- Current - Average Rectified (Io):
- 70mA
- 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
- Capacitance @ Vr, F:
- 2pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- 150°C (Max)
BAS70ZFILM FAQ
1.How can I place an order for BAS70ZFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS70ZFILM 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 BAS70ZFILM reliable?
The price and inventory of BAS70ZFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS70ZFILM is usually 5 days.
3.What payment methods are accepted for BAS70ZFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS70ZFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS70ZFILM?
BAS70ZFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS70ZFILM 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 BAS70ZFILM?
For technical support, including BAS70ZFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS70ZFILM requirements.
6.How does Aetrix verify that BAS70ZFILM is sourced from the original manufacturer or authorized distributors?
All BAS70ZFILM 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 BAS70ZFILM meets industry standards.
7.What is the process for return or replacement of BAS70ZFILM?
All BAS70ZFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAS70ZFILM, 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 BAS70ZFILM part is unused and in its original packaging.
Return procedure for BAS70ZFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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