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Diodes Incorporated ZXRE4041DFTA
- Part No.:
- ZXRE4041DFTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXRE4041DFTA.pdf
- Description:
- IC VREF SHUNT 1% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:10,575
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Product details
Overview
ZXRE4041DFTA from Diodes Incorporated is a precision micropower 1.225 V bandgap voltage reference in SOT23-3 package, with 1% initial tolerance, 20 ppm/°C typical temperature coefficient, and stable operation from 30 µA to 12 mA supply current-used in portable A/D converters and battery-powered instrumentation.
For engineers reviewing the ZXRE4041DFTA datasheet, ZXRE4041DFTA pinout, ZXRE4041DFTA application, or ZXRE4041DFTA equivalent, key selection criteria include knee current (30 µA), load-capacitance immunity, reverse breakdown stability over -40°C to +125°C, and SOT23 pin compatibility with LM4041 series references.
Technical Context
The ZXRE4041DFTA implements a two-terminal shunt topology with internal bandgap core, operating as a precision voltage clamp across an external cathode-to-anode bias network. It maintains regulation without requiring a dedicated ground pin, enabling simple integration into low-current feedback loops.
Its unconditionally stable design tolerates unlimited capacitive loading at the cathode, eliminating need for output isolation resistors. The device achieves ±0.5% tolerance in C-grade variants and supports full industrial temperature range (-40°C to +125°C) with guaranteed TC ≤ 100 ppm/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.225 V nominal; tight 1.219–1.231 V min/max at 25°C for D-grade (1% tolerance) |
| Initial Tolerance | ±1% (D grade); enables direct replacement in cost-sensitive precision supply monitoring |
| Temp Coefficient | 20 ppm/°C typical; ensures <±3 mV drift over -40°C to +85°C ambient |
| Knee Current | 30 µA; minimum current required to enter regulation-critical for ultra-low-power wake-up circuits |
| Operating Current | 30 µA to 12 mA; wide dynamic range supports both microamp sensor biasing and milliamp reference buffering |
| Dynamic Impedance | 0.2–0.6 Ω at 1 mA; low ZOUT minimizes output voltage shift under transient load steps |
| Wideband Noise | 60 µV(rms), 10 Hz–10 kHz; suitable for 12-bit ADC reference without additional filtering |
Pinout & Package
SOT23-3 package: 3-pin surface-mount plastic case (JEDEC TO-236AB), 2.80 × 2.64 × 1.12 mm body, gull-wing leads, RoHS-compliant green molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference return path | Connected to system ground or negative rail; floating allowed but not recommended for stability |
| Cathode (Pin 2) | Regulated output node | Provides 1.225 V reference; sinks current from external resistor or load |
| No-Connect (Pin 3) | Unused terminal | Internally unconnected; must remain unconnected per datasheet-no tie to ground or cathode |
Key Features
| Feature | Design Value |
|---|---|
| Unconditional capacitive-load stability | Eliminates need for series isolation resistor-even with >1 µF ceramic output capacitance |
| Ultra-low knee current | 30 µA enables use in energy-harvesting and coin-cell-powered systems |
| Industrial temperature range support | Guaranteed performance from -40°C to +125°C ambient-no derating required |
| Green packaging | Halogen-free, Br/Sb-free molding compound compliant with IPC-1752 and EU RoHS |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with 3.3 V rail and 12-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V reference for ADC internal gain calibration and offset nulling. Use Value: 20 ppm/°C TC and 60 µV noise ensure <0.025% measurement error across 0–50°C operating range. | Use Scenario: Isolated analog input module for PLC with 4–20 mA loop power. IC Role / Device Role / Timing Role: Low-current reference for op-amp-based current-sense amplifier and DAC feedback path. Use Value: 30 µA knee current allows operation directly from loop-powered 3.3 V LDO without auxiliary supply. |
| Portable Communication Devices | Notebook System Monitoring |
Use Scenario: Bluetooth LE audio headset with single-cell Li-ion battery and fuel gauge IC. IC Role / Device Role / Timing Role: Reference for battery voltage divider and ADC-based state-of-charge estimation. Use Value: Stable 1.225 V output over full discharge curve (4.2 V → 3.0 V) enables ±1% SoC accuracy. | Use Scenario: Embedded controller in ultrabook monitoring CPU VRM output and thermal diode. IC Role / Device Role / Timing Role: Precision reference for analog comparator thresholds and ADC reference scaling. Use Value: SOT23 footprint and 1% tolerance reduce BOM count vs. discrete resistor-divider solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4041CIM3X-ADJ/NOPB | Adjustable output (1.24 V min); 0.5% initial tolerance; higher 65 ppm/°C max TC | Requires external resistor divider; less stable over temperature than ZXRE4041DFTA | Select when adjustable reference is needed and tighter TC is not critical |
| MAX6008AEUR+T | Fixed 1.25 V output; 0.2% tolerance; 30 ppm/°C max TC; higher 100 µA min operating current | Higher accuracy but incompatible knee current for sub-100 µA systems | Prefer for high-precision, higher-current designs where 1.25 V matches system architecture |
Compared with LM4041CIM3X-ADJ/NOPB and MAX6008AEUR+T, ZXRE4041DFTA offers optimal balance of ultra-low knee current (30 µA), fixed 1.225 V output, and industry-leading 20 ppm/°C typical TC-making it uniquely suited for space-constrained, battery-operated precision analog front-ends.
Availability
ZXRE4041DFTA is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable communication devices, and notebook system monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ZXRE4041DFTA 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, low-power, and small-footprint solutions for consumer, industrial, and computing markets.
The ZXRE4041 belongs to Diodes' precision voltage reference product line, engineered specifically for ultra-low-power, space-constrained applications demanding stable reference voltage without external compensation components.
FAQ
What is the correct connection for Pin 3 on ZXRE4041DFTA?
Pin 3 is a no-connect (NC) terminal and must remain unconnected-neither tied to ground nor cathode. Internal die bonding confirms no electrical connection; soldering or routing to any net violates datasheet specifications and may cause parametric shift or instability.
Can ZXRE4041DFTA drive a 100 nF ceramic capacitor directly?
Yes-ZXRE4041DFTA is unconditionally stable with any capacitive load, including 100 nF X7R ceramics. Its internal compensation eliminates need for series resistance, unlike many shunt references that require ≥10 Ω isolation to prevent oscillation.
How does the 30 µA knee current affect circuit design?
The 30 µA knee current defines the minimum current the device must sink to maintain regulation. Designers must ensure the external bias resistor delivers ≥30 µA across the full input voltage range and temperature-e.g., at 3.0 V supply, Rbias ≤ 56 kΩ guarantees compliance down to -40°C.
Is ZXRE4041DFTA compatible with LM4041CIM3X-ADJ in the same PCB footprint?
No-while both are SOT23-3 packages, ZXRE4041DFTA uses Anode–Cathode–NC pinout (1–2–3), whereas LM4041CIM3X-ADJ uses Cathode–Anode–Adjust pinout (1–2–3). Direct footprint substitution causes functional failure; board layout must match respective pin assignments.
ZXRE4041DFTA 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):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 12 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 60µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 30 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXRE4041DFTA FAQ
1.How can I place an order for ZXRE4041DFTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE4041DFTA 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 ZXRE4041DFTA reliable?
The price and inventory of ZXRE4041DFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE4041DFTA is usually 5 days.
3.What payment methods are accepted for ZXRE4041DFTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE4041DFTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE4041DFTA?
ZXRE4041DFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE4041DFTA 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 ZXRE4041DFTA?
For technical support, including ZXRE4041DFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE4041DFTA requirements.
6.How does Aetrix verify that ZXRE4041DFTA is sourced from the original manufacturer or authorized distributors?
All ZXRE4041DFTA 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 ZXRE4041DFTA meets industry standards.
7.What is the process for return or replacement of ZXRE4041DFTA?
All ZXRE4041DFTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE4041DFTA, 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 ZXRE4041DFTA part is unused and in its original packaging.
Return procedure for ZXRE4041DFTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZXRE4041DFTA Tags
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