My Inquiry
My Account
Diodes Incorporated ZR285F03TC
- Part No.:
- ZR285F03TC
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZR285F03TC.pdf
- Description:
- IC VREF SHUNT 3% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,553
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ZR285F03TC from Diodes Incorporated is a precision 2.5 V micropower voltage reference IC using bandgap circuit design, rated for ±3% initial tolerance, 30 ppm/°C typical temperature coefficient, and stable operation from 13 µA to 20 mA supply current-used in battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the ZR285F03TC datasheet, ZR285F03TC pinout, ZR285F03TC application, or ZR285F03TC equivalent, key selection criteria include low knee current (15 µA typ), slope resistance (0.4 Ω typ), capacitive-load stability without external compensation, and SOT23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The ZR285F03TC operates as a two-terminal shunt voltage reference, requiring no external capacitor for stability and maintaining regulation across capacitive loads up to 10 nF. Its bandgap core delivers 2.5 V output with 30 ppm/°C TC and 0.4 Ω dynamic impedance over 20 µA–20 mA operating current.
It achieves microsecond-scale turn-on settling time and withstands transient currents up to 200 mA due to rugged 20 V process technology. Absolute maximum ratings include 30 mA reverse current and -40°C to +85°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.5 V ±3% at 150 µA - defines system accuracy baseline for ADC biasing and sensor excitation |
| Tempco (TC) | 30 ppm/°C typ - ensures ≤0.75 mV drift over -40°C to +85°C ambient |
| Slope Resistance | 0.4 Ω typ - minimizes load-induced output variation under dynamic current draw |
| Min Operating Current | 13 µA - enables ultra-low-power sleep-mode reference retention in portable devices |
| Dynamic Impedance | 0.3 Ω at 1 mA, 100 Hz - supports clean regulation in noisy power rail environments |
| Wideband Noise | 60 µV(rms), 10 Hz–10 kHz - suitable for 12-bit+ precision measurement front-ends |
Pinout & Package
SOT23-3 surface-mount package with 2.8 mm × 2.64 mm footprint, 1.12 mm height, and gull-wing leads; optimized for automated assembly and thermal performance in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Current sink input | Connected to regulated voltage node; floating or tied to cathode for specific bias configurations |
| Cathode (Pin 2) | Reference output | Delivers stable 2.5 V; requires series resistor to set operating current from higher supply rail |
| No-Connect (Pin 3) | Unused terminal | Internally unconnected; left unpopulated or grounded per layout best practice for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables single-component reference implementation in space-limited designs without stability risk |
| Low knee current (15 µA typ) | Permits operation below 20 µA, extending battery life in always-on monitoring circuits |
| Capacitive-load stability | Remains stable driving up to 10 nF-supports direct connection to ADC input capacitors |
| Rugged 200 mA surge rating | Survives ESD transients and inrush events without derating or protection circuitry |
Applications
| Battery-Powered Multimeters | Portable Data Loggers |
|---|---|
Use Scenario: Handheld digital multimeter requiring stable 2.5 V reference for 16-bit delta-sigma ADC during 100-hour battery operation. IC Role / Device Role / Timing Role: Two-terminal shunt reference providing precision bias for analog front-end scaling and offset calibration. Use Value: 13 µA minimum current enables >1-year battery life; ±3% tolerance meets Class II meter accuracy requirements per IEC 61010. | Use Scenario: Remote environmental sensor node logging temperature/humidity every 5 minutes using coin-cell power. IC Role / Device Role / Timing Role: Low-drift voltage reference for ratiometric sensor excitation and ADC reference in intermittent wake-up mode. Use Value: 30 ppm/°C tempco ensures <0.02% full-scale error across -20°C to +60°C field deployment range. |
| Industrial Panel Meters | Calibration Equipment |
Use Scenario: DIN-rail mounted 4–20 mA transmitter with local display, powered from loop supply. IC Role / Device Role / Timing Role: Precision reference for DAC output scaling and internal ADC self-calibration routines. Use Value: 0.4 Ω slope resistance limits output shift to <1 mV under 10 mA load variation-critical for 0.1% loop accuracy. | Use Scenario: Benchtop calibrator generating programmable DC voltages with 100 µV resolution. IC Role / Device Role / Timing Role: Primary reference source for high-stability DAC feedback path and metrology-grade voltage divider networks. Use Value: 60 µV(rms) wideband noise supports ≤14-bit effective resolution in 10 Hz–10 kHz bandwidth measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | Adjustable output (2.5–36 V), 0.5% initial tolerance, 92 ppm/°C max TC | Requires two external resistors; higher TC reduces accuracy in wide-temp industrial use | Choose when adjustable reference or tighter initial tolerance is needed, accepting higher tempco and BOM count |
| LM4040C25IDBZR | Fixed 2.5 V, ±0.5% tolerance, 100 ppm/°C max TC, 65 µV(rms) noise | Higher noise and TC limit use in 14-bit+ metrology; requires 60 µA min current | Prefer for cost-sensitive production where ±0.5% tolerance suffices and 60 µA supply is available |
Compared with TLVH431ACDBVR and LM4040C25IDBZR, ZR285F03TC offers superior thermal stability (30 ppm/°C vs. ≥92 ppm/°C) and lower minimum current (13 µA vs. ≥60 µA), making it optimal for ultra-low-power, high-accuracy portable instrumentation where fixed 2.5 V is acceptable.
Availability
ZR285F03TC is available at Aetrix Electronics and suitable for battery-powered multimeters, portable data loggers, industrial panel meters, and calibration equipment requiring stable component supply with long-term manufacturability assurance.
Supply support for ZR285F03TC 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 power management, signal integrity, and precision analog solutions for industrial and consumer markets.
The ZR285 product line delivers micropower shunt references optimized for space-constrained, battery-operated instrumentation-emphasizing low knee current, capacitor-free stability, and robust transient handling in harsh environments.
FAQ
What is the recommended external series resistor value for ZR285F03TC at 5 V supply?
At 5 V supply, a 100 kΩ series resistor sets nominal operating current at 25 µA-within the 20 µA–20 mA recommended range and above the 13 µA minimum. This value ensures stable regulation while minimizing power dissipation (25 µW) and maintaining adequate headroom for load variations.
Can ZR285F03TC drive a 10 nF capacitive load directly?
Yes-ZR285F03TC is explicitly characterized for capacitive-load stability up to 10 nF without external compensation. This allows direct connection to ADC sample-and-hold inputs or filtering networks without oscillation risk, verified across -40°C to +85°C and 20 µA–20 mA current range.
Does ZR285F03TC require a heatsink in SOT23-3 package at 20 mA?
No heatsink is required. At 20 mA and 2.5 V output, power dissipation is 50 mW-well below the SOT23-3 package's 330 mW rating at 25°C ambient. Thermal rise remains <15°C under standard PCB conditions (2-layer, 1 oz Cu), per DS32168 thermal characterization data.
How does ZR285F03TC behave during power-up transients?
It achieves stable output in <5 µs due to superior switching capability from its bandgap architecture. Transient current surges up to 200 mA are tolerated without damage or latch-up, thanks to 20 V process hardening-making it resilient against hot-swap and supply-rail bounce events in portable systems.
ZR285F03TC 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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±3%
- 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
ZR285F03TC FAQ
1.How can I place an order for ZR285F03TC through Aetrix?
Please submit a Request for Quotation (RFQ) for ZR285F03TC 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 ZR285F03TC reliable?
The price and inventory of ZR285F03TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR285F03TC is usually 5 days.
3.What payment methods are accepted for ZR285F03TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR285F03TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZR285F03TC?
ZR285F03TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZR285F03TC 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 ZR285F03TC?
For technical support, including ZR285F03TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR285F03TC requirements.
6.How does Aetrix verify that ZR285F03TC is sourced from the original manufacturer or authorized distributors?
All ZR285F03TC 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 ZR285F03TC meets industry standards.
7.What is the process for return or replacement of ZR285F03TC?
All ZR285F03TC units undergo pre-shipment inspection (PSI). If there is an issue with ZR285F03TC, 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 ZR285F03TC part is unused and in its original packaging.
Return procedure for ZR285F03TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZR285F03TC Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
