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Diodes Incorporated ZRC400A02STZ
- Part No.:
- ZRC400A02STZ
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
ZRC400A02STZ.pdf
- Description:
- IC VREF SHUNT 2% TO92
- Quantity:
- Payment:
- Shipping:
Inventory:1,466
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Product details
Overview
ZRC400A02STZ from Diodes Incorporated is a precision micropower 4.096 V bandgap voltage reference in SOT23-3 package, with ±2% initial tolerance, 30 ppm/°C typical temperature coefficient, and 0.4 Ω typical slope resistance. It operates from 23 µA to 5 mA, requires no external capacitor, and achieves stable output in <10 µs-ideal for battery-powered instrumentation and portable metering systems.
For engineers reviewing the ZRC400A02STZ datasheet, ZRC400A02STZ pinout, ZRC400A02STZ application, or ZRC400A02STZ equivalent, key selection criteria include knee current (18 µA typ), load stability without external capacitance, transient response time (<10 µs), and industrial temperature range (–40°C to +85°C).
Technical Context
The ZRC400A02STZ functions as a two-terminal shunt voltage reference, sinking current to maintain a precise 4.096 V reverse breakdown voltage across its anode-cathode terminals. Its bandgap core delivers low drift and high PSRR without requiring series pass elements or external compensation.
It exhibits stable operation under capacitive loads up to 1 µF and withstands transient currents up to 200 mA due to rugged 20 V process design. Slope resistance remains ≤2 Ω over 23 µA–5 mA operating current, enabling accurate regulation in low-power sensor biasing and ADC reference circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 4.096 V nominal; tight 4.014–4.178 V range at ±2% tolerance ensures accurate 12-bit DAC/ADC scaling. |
| Initial Tolerance | ±2% at 25°C; enables single-point calibration in portable test equipment without trimming. |
| Temp Coefficient | 30 ppm/°C typical; limits full-range drift to ±2.4 mV over –40°C to +85°C for stable metering accuracy. |
| Min Operating Current | 18 µA typical knee current; supports ultra-low-power wake-up circuits and energy-harvesting sensors. |
| Slope Resistance | 0.4 Ω typical; maintains <1 mV output shift per 2.5 mA load change-critical for precision current-sense references. |
| Transient Response | Stable in <10 µs; allows fast settling after power-on or load switching in portable DMMs and data loggers. |
| Capacitive Load Stability | Stable with ≥0 pF external capacitance; eliminates BOM cost and PCB area for decoupling caps in space-constrained designs. |
Pinout & Package
SOT23-3 package (suffix "F"), 3-pin surface-mount, 1.3 mm × 2.9 mm footprint. Pin 1 (anode) and Pin 3 (cathode) are functional; Pin 2 is floating or internally connected to Pin 1 per Diodes Inc. datasheet revision.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Current sink input | Connects to regulated node; sets reference voltage by sinking current through external resistor. |
| Pin 2 (NC) | No connect | Internally floating or tied to Pin 1-must not be used for signal routing or grounding. |
| Pin 3 (Cathode) | Reference output / ground reference | Provides stable 4.096 V relative to system ground; serves as precision return path for bias networks. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Eliminates 1–2 passive components and associated layout area in handheld multimeters and sensor nodes. |
| Low knee current (18 µA typ) | Enables operation from microamp-level bias sources-e.g., thermistor bridges or piezoelectric sensors. |
| Stable with capacitive loads | Supports direct connection to ADC input capacitors (e.g., SAR or sigma-delta) without oscillation risk. |
| Rugged 200 mA transient rating | Withstands ESD events and inrush surges in field-deployed test gear without derating or protection diodes. |
| Industrial temp range (–40°C to +85°C) | Validated performance across automotive cabin, industrial PLC, and outdoor metering environments. |
Applications
| Portable Digital Multimeter | Battery-Powered Data Logger |
|---|---|
Use Scenario: Handheld DMM requiring stable 4.096 V reference for 12-bit ADC conversion across battery discharge cycles. IC Role / Device Role / Timing Role: Two-terminal shunt reference providing precision voltage node for analog front-end scaling. Use Value: ±2% tolerance and <10 µs settling enable single-battery operation from 3.0 V to 4.2 V without recalibration. | Use Scenario: Remote environmental sensor node powered by coin cell, logging temperature/humidity every 10 seconds. IC Role / Device Role / Timing Role: Low-knee-current voltage reference for ADC and sensor excitation circuitry. Use Value: 18 µA knee current extends battery life beyond 5 years while maintaining 4.096 V accuracy within ±3 mV over temperature. |
| Industrial Panel Meter | Portable Oscilloscope Probe Calibration |
Use Scenario: DIN-rail mounted panel meter measuring 4–20 mA loop signals with local display and RS-485 output. IC Role / Device Role / Timing Role: Precision reference for current-to-voltage conversion and ADC reference rail. Use Value: 30 ppm/°C TC and 0.4 Ω slope resistance ensure <0.1% full-scale error across –25°C to +70°C ambient. | Use Scenario: Field-calibration accessory for oscilloscope probe gain/offset adjustment using internal 4.096 V standard. IC Role / Device Role / Timing Role: Portable, self-contained voltage standard traceable to bandgap stability. Use Value: No external capacitor and <10 µs transient response allow instant on-demand calibration without warm-up delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | 2.5 V nominal, adjustable via resistors; 2% tolerance; 50 ppm/°C TC; requires external bias network. | Used where programmable reference or higher current drive (>100 mA) is needed. | Select if adjustable output or higher sink current is required; avoid if fixed 4.096 V and minimal BOM are mandatory. |
| REF3040AIDBVR | 4.096 V fixed, 0.2% tolerance, 50 ppm/°C TC, 50 µA min current, requires 1 µF output cap. | Preferred in high-accuracy medical or lab-grade instruments where tighter tolerance justifies added capacitance. | Select for sub-0.5% total error budgets; avoid when board space or capacitor reliability is constrained. |
Compared with TL431ACDBVR and REF3040AIDBVR, the ZRC400A02STZ offers fixed 4.096 V output with no external components, lowest knee current (18 µA), and fastest settling (<10 µs), making it optimal for space- and power-constrained portable measurement tools.
Availability
ZRC400A02STZ is available at Aetrix Electronics and suitable for portable digital multimeters, battery-powered data loggers, and industrial panel meters requiring stable component supply with consistent parametric performance across production batches.
Supply support for ZRC400A02STZ 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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and protection applications.
The ZRC400 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, space-constrained instrumentation and portable test equipment demanding high stability without external compensation.
FAQ
Is ZRC400A02STZ a three-terminal or two-terminal device?
ZRC400A02STZ is a two-terminal shunt voltage reference: Pin 1 (anode) and Pin 3 (cathode) form the functional terminals; Pin 2 is NC (no connect) and must remain unconnected. It operates by sinking current from a supply through an external resistor to establish the 4.096 V reference at the cathode.
Can ZRC400A02STZ drive capacitive loads directly?
Yes-ZRC400A02STZ is explicitly designed to be stable with capacitive loads up to at least 1 µF without external series resistance or compensation. This is confirmed in the datasheet's "Capacitive Load Stability" section and validated in typical characteristics plots showing clean transient response with 1 µF loads.
What is the maximum safe operating current for continuous use?
The recommended continuous operating current is 5 mA, though the device can withstand transient currents up to 200 mA. Absolute maximum forward/reverse current is rated at 25 mA; sustained operation above 5 mA risks exceeding thermal limits in SOT23-3 (330 mW max at 25°C ambient), degrading long-term stability.
Does ZRC400A02STZ require a minimum load current to regulate?
Yes-it requires ≥18 µA (typical knee current) to enter regulation. Below this, output voltage drops nonlinearly. The datasheet specifies 23 µA as the minimum recommended operating current to guarantee 4.096 V ±2% across temperature; design margin should include worst-case knee current of 23 µA at –40°C.
ZRC400A02STZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Series:
- -
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±2%
- Temperature Coefficient:
- 90ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 90µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 23 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92
ZRC400A02STZ FAQ
1.How can I place an order for ZRC400A02STZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ZRC400A02STZ 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 ZRC400A02STZ reliable?
The price and inventory of ZRC400A02STZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC400A02STZ is usually 5 days.
3.What payment methods are accepted for ZRC400A02STZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC400A02STZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZRC400A02STZ?
ZRC400A02STZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZRC400A02STZ 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 ZRC400A02STZ?
For technical support, including ZRC400A02STZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC400A02STZ requirements.
6.How does Aetrix verify that ZRC400A02STZ is sourced from the original manufacturer or authorized distributors?
All ZRC400A02STZ 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 ZRC400A02STZ meets industry standards.
7.What is the process for return or replacement of ZRC400A02STZ?
All ZRC400A02STZ units undergo pre-shipment inspection (PSI). If there is an issue with ZRC400A02STZ, 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 ZRC400A02STZ part is unused and in its original packaging.
Return procedure for ZRC400A02STZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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