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Diodes Incorporated ZRB500F03TA
- Part No.:
- ZRB500F03TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZRB500F03TA.pdf
- Description:
- IC VREF SHUNT 3% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:16,038
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Product details
Overview
ZRB500F03TA from Diodes Incorporated is a precision 5.0 V micropower voltage reference IC using bandgap circuitry, rated for ±3% initial tolerance, 15 ppm/°C typical temperature coefficient, and stable operation from 50 µA to 15 mA supply current in SOT23-3 package - deployed in battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the ZRB500F03TA datasheet, ZRB500F03TA pinout, ZRB500F03TA application, or ZRB500F03TA equivalent, key selection criteria include reverse breakdown voltage stability across -40°C to +85°C, sub-10 µs transient response, low 0.33 Ω typical slope resistance, and capacitor-free operation in precision analog power rails.
Technical Context
The ZRB500F03TA functions as a two-terminal shunt voltage reference with cathode (VR) and anode (GND) terminals, operating in reverse breakdown mode. Its bandgap-derived core delivers 5.0 V nominal output with 15 ppm/°C typical TC and maintains regulation without external capacitance.
It exhibits 0.4 Ω typical reverse dynamic impedance at 1 mA and 105 µV(rms) wideband noise (10 Hz–10 kHz), supporting high-accuracy ADC biasing and sensor excitation where low drift and fast settling are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 4.85 V to 5.15 V (±3% initial tolerance at 150 µA; ensures 5.0 V nominal accuracy under production variation) |
| Temp Coefficient | 15 ppm/°C typical (max 50 ppm/°C; enables ≤1.5 mV drift over -40°C to +85°C ambient) |
| Operating Current | 50 µA to 15 mA (supports ultra-low-power sleep modes and full-load regulation without external biasing) |
| Slope Resistance | 0.33 Ω typical (minimizes load-induced voltage shift; <1 mV error at 1 mA load change) |
| Transient Response | <10 µs settling (enables rapid wake-up from low-power states in portable measurement systems) |
| Noise (10 Hz–10 kHz) | 105 µV(rms) (low enough for 16-bit ADC reference without additional filtering) |
| Package | SOT23-3 (3.0 × 1.7 mm footprint; compatible with standard pick-and-place and reflow processes) |
Pinout & Package
SOT23-3 package with gull-wing leads; 3-pin surface-mount outline per Diodes DS32240 Rev. 6-2, dimensions: 2.90 mm × 1.30 mm × 1.00 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (VR) | Output reference node; connects to regulated 5.0 V rail or ADC reference input |
| Pin 2 | Anode (GND) | Ground return path; must be low-impedance for stable regulation and noise rejection |
| Pin 3 | NC / Floating | No internal connection; may be left unconnected or tied to Pin 2 per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates stably without external bypass capacitor - reduces BOM count and PCB area in space-constrained designs |
| Microamp startup | Minimum operating current of 30 µA enables use in energy-harvesting and coin-cell applications |
| Rugged transient handling | Withstands 200 mA surge currents and 20 V processing - improves reliability in noisy industrial environments |
| Green compound packaging | Halogen-free, RoHS-compliant molding compound (no Br/Sb) meets environmental compliance requirements |
Applications
| Battery-Powered Multimeters | Portable Data Loggers |
|---|---|
|
Use Scenario: Handheld digital multimeter requiring stable 5 V reference for 4½-digit ADC conversion across varying battery voltage (2.8–4.2 V). IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 5.0 V reference to SAR ADC and display driver ICs. Use Value: ±3% tolerance and 15 ppm/°C TC ensure <0.02% full-scale error over temperature and battery discharge cycle. |
Use Scenario: Low-power environmental sensor node logging temperature/humidity every 10 seconds using coin-cell battery. IC Role / Device Role / Timing Role: Micropower reference supplying bias to precision op-amps and ADC reference input during active sampling bursts. Use Value: 50 µA minimum operating current extends battery life beyond 2 years while maintaining 16-bit measurement fidelity. |
| Industrial Panel Meters | Calibration Equipment |
|
Use Scenario: DIN-rail mounted panel meter with 0–10 V analog input scaling and local display, operating continuously at 60°C ambient. IC Role / Device Role / Timing Role: Primary voltage reference for input signal conditioning and DAC-based output generation. Use Value: Stable 5.0 V output with <1.5 mV total drift over -40°C to +85°C eliminates need for periodic recalibration. |
Use Scenario: Benchtop calibration source verifying 0.1% accuracy of field instruments in metrology labs. IC Role / Device Role / Timing Role: Precision reference element in programmable voltage source architecture with buffered output stage. Use Value: 0.33 Ω slope resistance and <10 µs transient response enable step-response fidelity within 0.01% of final value for traceable calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBZR | 2.5 V adjustable reference (requires external resistors); 20 ppm/°C max TC; 1 mA min cathode current | Requires resistor network for 5 V setting; higher minimum current increases quiescent power | Choose when design already uses TL431 family and 2.5 V base reference is acceptable with scaling |
| LM4040CIM3-5.0 | Fixed 5.0 V; ±0.5% initial tolerance; 100 ppm/°C max TC; 60 µA min operating current | Tighter initial tolerance but higher TC degrades accuracy above 40°C; less suitable for wide-temp industrial use | Prefer for cost-sensitive consumer applications where ambient stays near 25°C and tighter initial spec outweighs temp drift |
Compared with TL431ACDBZR and LM4040CIM3-5.0, ZRB500F03TA offers superior temperature stability (15 ppm/°C vs. 100 ppm/°C) and lower minimum current (50 µA vs. 60 µA), making it optimal for battery-operated industrial instrumentation requiring long-term accuracy across temperature extremes.
Availability
ZRB500F03TA is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable data acquisition systems, and industrial panel meters requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for ZRB500F03TA 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, application-optimized components for industrial, computing, and consumer markets.
ZRB500 belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-stability analog subsystems in portable and harsh-environment measurement equipment.
FAQ
Can ZRB500F03TA operate without an external capacitor?
Yes - the ZRB500F03TA is internally compensated and stable with capacitive loads up to 10 nF without requiring an external bypass capacitor. This simplifies layout and reduces component count in space-constrained designs such as handheld test equipment and sensor nodes.
What is the maximum safe operating current for continuous use?
The absolute maximum forward current is 25 mA per datasheet Absolute Maximum Ratings. For reliable long-term operation, Diodes recommends staying within 15 mA - the upper limit of the specified operating current range where all electrical characteristics are guaranteed.
Is Pin 3 electrically connected inside the device?
No - Pin 3 is not internally connected and is designated NC (No Connect). The datasheet explicitly states it may be left floating or tied to Pin 2 (GND) for mechanical stability or EMI reduction, with no electrical impact on regulation performance.
How does ZRB500F03TA compare to Zener diodes in precision applications?
Unlike standard Zeners, ZRB500F03TA uses a bandgap core delivering 15 ppm/°C TC (vs. >100 ppm/°C for most Zeners), 0.33 Ω slope resistance (vs. >10 Ω), and guaranteed ±3% tolerance at 25°C - enabling repeatable, low-drift performance essential for 16-bit data acquisition and metrology-grade calibration.
ZRB500F03TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±3%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 105µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 50 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZRB500F03TA FAQ
1.How can I place an order for ZRB500F03TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZRB500F03TA 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 ZRB500F03TA reliable?
The price and inventory of ZRB500F03TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRB500F03TA is usually 5 days.
3.What payment methods are accepted for ZRB500F03TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRB500F03TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZRB500F03TA?
ZRB500F03TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZRB500F03TA 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 ZRB500F03TA?
For technical support, including ZRB500F03TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRB500F03TA requirements.
6.How does Aetrix verify that ZRB500F03TA is sourced from the original manufacturer or authorized distributors?
All ZRB500F03TA 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 ZRB500F03TA meets industry standards.
7.What is the process for return or replacement of ZRB500F03TA?
All ZRB500F03TA units undergo pre-shipment inspection (PSI). If there is an issue with ZRB500F03TA, 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 ZRB500F03TA part is unused and in its original packaging.
Return procedure for ZRB500F03TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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