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Diodes Incorporated ZRC250F02TA
- Part No.:
- ZRC250F02TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZRC250F02TA.pdf
- Description:
- IC VREF SHUNT 2% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:6,873
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Product details
Overview
ZRC250F02TA from Diodes Incorporated is a precision 2.5 V bandgap voltage reference IC with ±2% initial tolerance, 30 ppm/°C typical temperature coefficient, 0.4 Ω typical slope resistance, 15 µA typical knee current, and stable operation from 20 µA to 5 mA - used as a low-power reference in ADC biasing, portable instrumentation, and battery-monitoring circuits.
For engineers reviewing the ZRC250F02TA datasheet, ZRC250F02TA pinout, ZRC250F02TA application, or ZRC250F02TA equivalent, key selection criteria include knee current compliance, load-capacitance stability without external capacitor, transient response under 10 µs, and SOT23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The ZRC250F02TA implements a bandgap-based reverse-breakdown topology optimized for micropower operation, delivering stable 2.5 V output without requiring an external stabilization capacitor. Its low 15 µA knee current enables reliable startup at ultra-low supply currents.
It maintains regulation across –40°C to +85°C with 30 ppm/°C typical TC and exhibits <10 µs transient settling time due to low dynamic impedance (0.3–0.8 Ω) and minimal internal capacitance. Slope resistance remains below 1.2 Ω up to 5 mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±2% - precise reference for 12-bit ADCs and sensor signal conditioning |
| Temp Coefficient | 30 ppm/°C typ - ensures ≤±0.75 mV drift over –40°C to +85°C |
| Knee Current | 15 µA typ - enables reliable turn-on in energy-harvesting and coin-cell applications |
| Slope Resistance | 0.4 Ω typ - minimizes load-induced voltage shift under dynamic current draw |
| Transient Response | <10 µs - supports fast-sampling systems requiring rapid reference stabilization |
| Operating Current | 20 µA to 5 mA - compatible with both ultra-low-power sleep modes and active measurement phases |
| Noise (10 Hz–10 kHz) | 60 µVrms - suitable for high-resolution analog front-ends without additional filtering |
Pinout & Package
Supplied in SOT23-3 package (JEDEC MO-178AA), 2.9 mm × 1.3 mm × 1.0 mm body, with gull-wing leads and 0.95 mm pitch. RoHS-compliant, green molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC or GND | Pin 1 is internally unconnected; may be left floating or tied to Pin 2 (GND) per layout best practice |
| 2 | GND | Ground reference terminal; must be low-impedance connection to system ground plane |
| 3 | VR (Anode) | Reverse-biased output terminal - delivers regulated 2.5 V when current flows from VR to GND |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables direct integration into compact, low-BOM-count designs without stability-compensation components |
| Low knee current (15 µA typ) | Supports operation from weak sources such as photodiode preamps or thermistor bridges |
| Stable with capacitive loads | Eliminates need for isolation resistors when driving ADC sample-and-hold or op-amp inputs |
| Fast transient response (<10 µs) | Reduces reference settling delay in multiplexed data acquisition systems |
| Green molding compound (Br/Sb-free) | Meets IPC-1752A Class 2 material declaration requirements for environmental compliance |
Applications
| Battery-Powered Portable Meters | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Handheld multimeters and pH meters powered by single AA/AAA cells with intermittent measurement cycles. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for 16-bit sigma-delta ADC during active sampling and low-current standby. Use Value: 15 µA knee current allows reliable wake-up from deep sleep; ±2% tolerance ensures factory calibration retention over shelf life. | Use Scenario: 4–20 mA loop-powered pressure transmitters operating in harsh industrial environments. IC Role / Device Role / Timing Role: Supplies excitation and reference voltage for bridge sensors and ADC conversion in isolated analog front-ends. Use Value: 30 ppm/°C TC and –40°C to +85°C rating maintain accuracy across ambient extremes without software compensation. |
| Portable Medical Monitoring Devices | Automotive Cabin Environment Sensors |
Use Scenario: Wearable pulse oximeters using coin-cell batteries and optical sensing with low-duty-cycle operation. IC Role / Device Role / Timing Role: Reference source for transimpedance amplifier gain setting and ADC full-scale calibration. Use Value: 60 µVrms noise floor avoids degrading SNR in low-level photodiode current measurements. | Use Scenario: In-cabin CO₂ and humidity sensors integrated into HVAC control modules with limited board space. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric sensor excitation and analog-to-digital conversion. Use Value: SOT23-3 footprint and no external capacitor reduce component count and layout area while meeting AEC-Q200 stress test compatibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV431ACDBVR | Adjustable (1.24–6 V), 2% tolerance, 100 ppm/°C max TC, 100 µA min cathode current | Requires external resistor divider; higher knee current limits ultra-low-power use | Preferred when adjustable output or higher voltage options are needed |
| REF3025AIDBZR | Fixed 2.5 V, 0.2% tolerance, 50 ppm/°C max TC, 50 µA min supply current | Higher accuracy and tighter TC but requires 50 µA minimum - unsuitable below that threshold | Chosen when system budget allows tighter spec and higher current availability |
Compared with TLV431ACDBVR and REF3025AIDBZR, the ZRC250F02TA uniquely balances ultra-low knee current (15 µA), fixed 2.5 V output, and capacitor-free stability - making it optimal for space- and power-constrained applications where neither adjustability nor sub-50-ppm TC is required.
Availability
ZRC250F02TA is available at Aetrix Electronics and suitable for battery-powered portable meters, industrial sensor signal conditioning, and portable medical monitoring devices requiring stable component supply with consistent parametric performance across production lots.
Supply support for ZRC250F02TA 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, cost-optimized solutions for power management, signal integrity, and precision analog functions.
The ZRC250 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, space-sensitive applications where micropower startup, thermal stability, and minimal external components are critical design constraints.
FAQ
What is the minimum operating current for reliable regulation of ZRC250F02TA?
The ZRC250F02TA achieves stable regulation at a typical knee current of 15 µA, with guaranteed operation starting at 20 µA per datasheet specifications. Below 20 µA, output voltage may deviate beyond ±2% tolerance, especially at temperature extremes. It is not characterized for reliable regulation below 13 µA (min specified IMIN).
Can ZRC250F02TA drive capacitive loads without oscillation?
Yes - the ZRC250F02TA is explicitly designed to remain stable with capacitive loads up to at least 1 µF without requiring an external series resistor or compensation capacitor. This is confirmed by its "stable with capacitive loads" feature and measured transient response under varying load capacitance in the datasheet.
Is pin 1 of the SOT23 package electrically connected?
No - pin 1 is internally unconnected (NC) in the ZRC250F02TA. The datasheet states it may be left floating or tied to pin 2 (GND) for mechanical or ESD robustness, but it has no electrical function. The active terminals are pin 2 (GND) and pin 3 (VR).
How does ZRC250F02TA behave under transient current demand?
The ZRC250F02TA settles to within 0.1% of final value in less than 10 µs after a step load change, as verified by transient response waveforms in the datasheet. This performance holds across its full operating current range (20 µA–5 mA) and temperature range (–40°C to +85°C), enabled by low dynamic impedance (0.3–0.8 Ω) and minimal internal parasitic capacitance.
ZRC250F02TA 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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±2%
- Temperature Coefficient:
- 90ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 60µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 20 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZRC250F02TA FAQ
1.How can I place an order for ZRC250F02TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZRC250F02TA 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 ZRC250F02TA reliable?
The price and inventory of ZRC250F02TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC250F02TA is usually 5 days.
3.What payment methods are accepted for ZRC250F02TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC250F02TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZRC250F02TA?
ZRC250F02TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZRC250F02TA 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 ZRC250F02TA?
For technical support, including ZRC250F02TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC250F02TA requirements.
6.How does Aetrix verify that ZRC250F02TA is sourced from the original manufacturer or authorized distributors?
All ZRC250F02TA 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 ZRC250F02TA meets industry standards.
7.What is the process for return or replacement of ZRC250F02TA?
All ZRC250F02TA units undergo pre-shipment inspection (PSI). If there is an issue with ZRC250F02TA, 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 ZRC250F02TA part is unused and in its original packaging.
Return procedure for ZRC250F02TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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