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Diodes Incorporated ZXRE4041CFTA
- Part No.:
- ZXRE4041CFTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXRE4041CFTA.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:16,628
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Product details
Overview
ZXRE4041CFTA from Diodes Incorporated is a precision micropower bandgap voltage reference delivering 1.225 V ±0.5% at 25°C, with 20 ppm/°C typical temperature coefficient and stable operation from 30 µA to 12 mA supply current. It is housed in a SOT23-3 package and serves as a pin-compatible alternative to LM4041 in space-constrained, battery-powered analog signal chains.
For engineers reviewing the ZXRE4041CFTA datasheet, ZXRE4041CFTA pinout, ZXRE4041CFTA application, or ZXRE4041CFTA equivalent, key selection criteria include knee current (30 µA), reverse dynamic impedance (0.2–0.6 Ω), wideband noise (60 µVrms), tolerance grade (C = ±0.5%), and unconditional capacitive-load stability.
Technical Context
The ZXRE4041CFTA implements a two-terminal shunt topology with internal bandgap core, operating as a precision voltage sink across anode-cathode terminals. Its design eliminates need for external bias resistors in many configurations and maintains regulation down to 30 µA minimum current.
It achieves thermal stability via curvature-compensated bandgap architecture and exhibits low dynamic impedance (0.2 Ω typ.) and low noise (60 µVrms, 10 Hz–10 kHz), enabling high-resolution ADC/DAC reference and low-drift sensor excitation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.225 V ±0.5% at 25°C - defines absolute accuracy for 12-bit+ data converters |
| Tempco | 20 ppm/°C typ. - ensures ≤±1.2 mV drift over –40°C to +85°C |
| Knee Current | 30 µA - enables ultra-low-power operation in sleep-mode sensor nodes |
| Dynamic Impedance | 0.2 Ω typ. at 1 mA - minimizes load-induced reference voltage shift |
| Noise (10 Hz–10 kHz) | 60 µVrms - supports 16-bit ADC performance without external filtering |
| Capacitive Load Stability | Unconditionally stable - allows direct connection to 10 µF ceramic bypass without oscillation |
Pinout & Package
SOT23-3 package (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 output node | Connected to cathode of internal bandgap; used as regulated voltage source point when configured as shunt reference |
| Cathode (Pin 2) | Current input terminal | Accepts bias current from external resistor; voltage at this pin is fixed at 1.225 V above anode |
| No-Connect (Pin 3) | Unused terminal | Internally floating; may be left unconnected or tied to cathode per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Shunt topology with no external bias resistor required | Enables direct replacement of Zener diodes in existing 1.2 V reference designs |
| 0.5% initial tolerance (C grade) | Eliminates post-manufacture trimming for mid-precision instrumentation |
| 30 µA minimum operating current | Supports energy harvesting and coin-cell applications with <1 µW quiescent power |
| Unconditional stability with capacitive loads | Permits use of large local decoupling caps without phase-margin compensation |
| 20 ppm/°C tempco over full industrial range | Meets drift budget for portable medical sensors and handheld test meters |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with dual-slope ADC requiring stable reference under varying battery voltage. IC Role / Device Role / Timing Role: Shunt voltage reference providing 1.225 V reference for integrator capacitor charging. Use Value: 30 µA knee current extends battery life >200 hours; 0.5% tolerance avoids calibration during production. | Use Scenario: 16-bit SAR ADC in environmental monitoring node powered by Li-SOCl₂ cell. IC Role / Device Role / Timing Role: Low-noise reference source for ADC conversion accuracy. Use Value: 60 µVrms noise ensures ENOB ≥15.2 bits; unconditionally stable with 4.7 µF ceramic cap. |
| Portable Communication Devices | Test & Measurement Equipment |
Use Scenario: RF front-end bias control in Bluetooth LE module where supply varies from 2.7 V to 3.6 V. IC Role / Device Role / Timing Role: Precision current sink for setting VCO tuning voltage via DAC output. Use Value: 20 ppm/°C tempco prevents frequency drift >±100 Hz over operating temperature. | Use Scenario: Benchtop DMM reference subsystem requiring long-term stability and low hysteresis. IC Role / Device Role / Timing Role: Primary shunt reference in auto-ranging voltage measurement path. Use Value: 0.2 Ω dynamic impedance limits reference error to <0.1 mV under 10 mA load transients. |
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 | Adjustable output (1.24 V min); higher 65 ppm/°C max tempco; 75 µA min current | Requires external resistor divider; less suitable for fixed 1.225 V systems | Select only if adjustable reference or higher output voltage is required |
| MAX6008AEUR+T | Fixed 1.25 V output; 15 ppm/°C max tempco; 20 µA min current; SC70-3 package | Lower knee current but tighter tempco; smaller footprint but lower ESD rating (2 kV HBM) | Prefer for ultra-low-power designs needing <20 µA operation and 1.25 V nominal |
Compared with LM4041CIM3X-ADJ and MAX6008AEUR+T, the ZXRE4041CFTA offers optimal balance of fixed 1.225 V accuracy, ultra-low knee current, and proven stability in high-capacitance environments-making it ideal for cost-sensitive, space-constrained, battery-operated precision analog systems.
Availability
ZXRE4041CFTA is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition, and portable communication devices requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for ZXRE4041CFTA 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 space-efficient solutions for industrial, computing, and consumer markets.
The ZXRE4041 belongs to Diodes' precision voltage reference product line, engineered specifically for micropower, low-drift, and high-stability applications in portable and battery-constrained systems.
FAQ
What is the recommended external bias resistor value for ZXRE4041CFTA at 3.3 V supply?
At 3.3 V supply, a 68 kΩ resistor delivers ~30.9 µA bias current-just above the 30 µA knee-and ensures stable regulation while minimizing power consumption. For 5 V supply, use 120 kΩ. Resistor tolerance should be ≤1% to maintain reference accuracy within spec.
Can ZXRE4041CFTA drive a 100 nF ceramic capacitor directly?
Yes-ZXRE4041CFTA is unconditionally stable with capacitive loads up to at least 10 µF, as confirmed in the datasheet's stability characterization. A 100 nF ceramic capacitor is well within safe operating range and improves high-frequency PSRR without risk of oscillation.
How does the 0.5% tolerance affect system-level calibration?
The ±0.5% initial tolerance at 25°C translates to ±6.1 mV error at 1.225 V, which corresponds to ~1 LSB error in a 12-bit 2.5 V full-scale ADC. This allows single-point factory calibration instead of multi-point trimming, reducing test time and cost in high-volume production.
Is ZXRE4041CFTA qualified for automotive temperature range?
No-ZXRE4041CFTA is specified for –40°C to +125°C operating temperature, but Diodes does not qualify this variant to AEC-Q100. For automotive applications, consider the ZXRE4041Q series (AEC-Q100 Grade 1), which shares identical electrical specs but includes extended reliability testing and PPAP documentation.
ZXRE4041CFTA 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:
- ±0.5%
- 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
ZXRE4041CFTA FAQ
1.How can I place an order for ZXRE4041CFTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE4041CFTA 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 ZXRE4041CFTA reliable?
The price and inventory of ZXRE4041CFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE4041CFTA is usually 5 days.
3.What payment methods are accepted for ZXRE4041CFTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE4041CFTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE4041CFTA?
ZXRE4041CFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE4041CFTA 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 ZXRE4041CFTA?
For technical support, including ZXRE4041CFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE4041CFTA requirements.
6.How does Aetrix verify that ZXRE4041CFTA is sourced from the original manufacturer or authorized distributors?
All ZXRE4041CFTA 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 ZXRE4041CFTA meets industry standards.
7.What is the process for return or replacement of ZXRE4041CFTA?
All ZXRE4041CFTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE4041CFTA, 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 ZXRE4041CFTA part is unused and in its original packaging.
Return procedure for ZXRE4041CFTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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