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Diodes Incorporated ZRC400A01STZ
- Part No.:
- ZRC400A01STZ
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
ZRC400A01STZ.pdf
- Description:
- IC VREF SHUNT 1% TO92
- Quantity:
- Payment:
- Shipping:
Inventory:4,274
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Product details
Overview
ZRC400A01STZ from Diodes Incorporated is a precision 4.096 V micropower shunt voltage reference with ±1% initial tolerance, 30 ppm/°C typical temperature coefficient, and 0.4 Ω typical slope resistance. It operates from 23 µA to 5 mA without external stabilization capacitors and delivers stable output in <10 µs transient response-ideal for battery-powered instrumentation and portable metering systems.
For engineers reviewing the ZRC400A01STZ datasheet, ZRC400A01STZ pinout, ZRC400A01STZ application, or ZRC400A01STZ equivalent, key selection criteria include knee current (18 µA typ), load regulation capability, TC performance across –40°C to +85°C, and compatibility with capacitive loads up to 25 mA.
Technical Context
The ZRC400A01STZ implements a bandgap-based shunt reference architecture, delivering a fixed 4.096 V reverse breakdown voltage with no external capacitor required for stability. Its low 0.4 Ω slope resistance enables tight load regulation under varying current conditions from 23 µA to 5 mA.
It features robust transient immunity-stable within 10 µs for single-pulse events and maintains specification integrity up to 200 mA surge current-enabled by 20 V process ruggedness and internal current-limiting design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 4.096 V ±1% - precise ADC/DAC biasing and calibration anchor point |
| Initial Tolerance | ±1% at 25°C - enables single-point calibration in portable test equipment |
| Temp Coefficient | 30 ppm/°C typ - ensures ≤1.2 mV drift over –40°C to +85°C operating range |
| Slope Resistance | 0.4 Ω typ - supports <1 mV output change per 2.5 mA load variation |
| Knee Current | 18 µA typ - allows operation down to ultra-low-power sleep modes |
| Transient Response | <10 µs to stability - suitable for fast-switching power monitoring circuits |
| Max Operating Current | 5 mA - defines upper limit for series resistor sizing in shunt configuration |
Pinout & Package
Package: SOT-23 (3-pin, surface-mount); suffix "F" in ordering code denotes SOT23; "STZ" indicates tape-and-reel packaging per JEDEC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Current sink input | Connected to regulated voltage node; sets reference current via external resistor |
| Cathode (Pin 2) | Reference output | Provides stable 4.096 V relative to anode; used as precision bias or feedback node |
| NC / Floating (Pin 3) | No connection | Internally unconnected; must remain floating or tied to Pin 1 per datasheet guidance |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables compact PCB layout in space-constrained portable designs without stability risk |
| Low knee current (18 µA typ) | Permits use in microamp-level standby circuits without dropout or regulation loss |
| Stable with capacitive loads | Supports direct connection to ADC input caps or op-amp feedback networks |
| Rugged 200 mA surge rating | Withstands ESD transients and inrush events without parameter shift or failure |
| Industrial temp range (–40°C to +85°C) | Validated performance across full ambient range for field-deployed measurement gear |
Applications
| Portable Multimeters | Battery Management IC Reference |
|---|---|
Use Scenario: Handheld digital multimeter requiring stable 4.096 V reference for 16-bit SAR ADC scaling. IC Role / Device Role / Timing Role: Shunt voltage reference providing ratiometric accuracy against supply variations. Use Value: ±1% tolerance and 30 ppm/°C TC ensure <0.02% full-scale error across operating temperature. | Use Scenario: Li-ion battery pack monitor IC needing precision reference for cell voltage sampling. IC Role / Device Role / Timing Role: Low-current shunt reference powering analog front-end comparators and ADC bias. Use Value: 18 µA knee current enables continuous monitoring during deep-sleep states without compromising battery life. |
| Portable Oscilloscope Front-End | Smart Energy Meter Calibration |
Use Scenario: Entry-level portable oscilloscope using 4.096 V reference for vertical gain calibration. IC Role / Device Role / Timing Role: Precision DC bias source for programmable gain amplifier offset trimming. Use Value: <10 µs transient response ensures reference settles before acquisition trigger window closes. | Use Scenario: DIN-rail energy meter requiring traceable voltage reference for revenue-grade kWh measurement. IC Role / Device Role / Timing Role: Primary reference for metrology-grade sigma-delta ADC in isolation barrier interface. Use Value: 0.4 Ω slope resistance minimizes line regulation error when powered from isolated DC-DC converter. |
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% initial tol; 50 ppm/°C TC | Requires external resistor network; less precise for fixed 4.096 V use cases | Choose if adjustable output or cost sensitivity outweighs precision needs |
| REF3040AIDBZR | 4.096 V fixed, 0.2% tol, 50 ppm/°C TC, 50 µA min current | Higher accuracy but higher minimum current limits ultra-low-power use | Choose for metrology-grade accuracy where >50 µA supply is available |
Compared with TL431ACDBVR and REF3040AIDBZR, the ZRC400A01STZ uniquely balances ±1% tolerance, sub-20 µA knee current, and capacitor-free stability-making it optimal for space- and power-constrained portable instrumentation where fixed 4.096 V is mandatory.
Availability
ZRC400A01STZ is available at Aetrix Electronics and suitable for portable test equipment, battery-powered sensors, and industrial metering systems requiring stable component supply with guaranteed long-term continuity.
Supply support for ZRC400A01STZ 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, headquartered in Plano, Texas, serving industrial, computing, consumer, and communications markets.
The ZRC400 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-stability shunt reference applications in portable and battery-operated instrumentation.
FAQ
What is the recommended external series resistor for ZRC400A01STZ at 5 V supply?
At 5 V supply, a 182 Ω resistor sets nominal 5 mA operating current (I = (5 V − 4.096 V) / 182 Ω ≈ 5 mA). This value ensures stable regulation while staying within SOA limits. For lower power, increase resistance to maintain ≥23 µA minimum current-e.g., 39 kΩ yields ~23 µA at 5 V.
Can ZRC400A01STZ drive a 1000 pF capacitive load directly?
Yes-the ZRC400A01STZ is explicitly characterized as stable with capacitive loads and requires no external compensation. Datasheet plots confirm stable step response with ≥1 nF loads, making it suitable for direct connection to ADC sample capacitors or op-amp inputs without oscillation risk.
Does ZRC400A01STZ require derating above 25°C ambient?
Yes-power dissipation must be derated linearly above 25°C. For SOT-23 package, thermal resistance is 375°C/W; maximum allowable power drops by 2.67 mW/°C above 25°C. At 70°C ambient, max power reduces to ~210 mW, limiting max current to ~51 mA at 4.096 V-well above its 5 mA operating range.
How does ZRC400A01STZ perform under reverse polarity conditions?
ZRC400A01STZ is a shunt device designed for reverse-biased operation only. Forward bias (anode > cathode) results in ~0.7 V diode drop and no regulation. Absolute maximum forward current is 25 mA-exceeding this risks permanent damage. Reverse polarity protection must be implemented externally if system-level fault conditions exist.
ZRC400A01STZ 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:
- ±1%
- 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
ZRC400A01STZ FAQ
1.How can I place an order for ZRC400A01STZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ZRC400A01STZ 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 ZRC400A01STZ reliable?
The price and inventory of ZRC400A01STZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC400A01STZ is usually 5 days.
3.What payment methods are accepted for ZRC400A01STZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC400A01STZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZRC400A01STZ?
ZRC400A01STZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZRC400A01STZ 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 ZRC400A01STZ?
For technical support, including ZRC400A01STZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC400A01STZ requirements.
6.How does Aetrix verify that ZRC400A01STZ is sourced from the original manufacturer or authorized distributors?
All ZRC400A01STZ 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 ZRC400A01STZ meets industry standards.
7.What is the process for return or replacement of ZRC400A01STZ?
All ZRC400A01STZ units undergo pre-shipment inspection (PSI). If there is an issue with ZRC400A01STZ, 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 ZRC400A01STZ part is unused and in its original packaging.
Return procedure for ZRC400A01STZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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