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Diodes Incorporated ZXRE4041DFTC
- Part No.:
- ZXRE4041DFTC
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXRE4041DFTC.pdf
- Description:
- IC VREF SHUNT 1% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,163
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Product details
Overview
ZXRE4041DFTC from Diodes Incorporated is a precision micropower bandgap voltage reference delivering 1.225 V ±1% (D grade) with 20 ppm/°C typical temperature coefficient, 30 µA knee current, and unconditional stability into capacitive loads - used in portable A/D converters and battery-powered instrumentation.
For engineers reviewing the ZXRE4041DFTC datasheet, ZXRE4041DFTC pinout, ZXRE4041DFTC application, or ZXRE4041DFTC equivalent, key selection criteria include operating current range (30 µA to 12 mA), reverse dynamic impedance (0.2–0.6 Ω), wideband noise (60 µVrms), tolerance grade compatibility, and SOT23 footprint constraints.
Technical Context
The ZXRE4041DFTC operates as a two-terminal shunt reference, sinking current from an external resistor to maintain a stable 1.225 V across its terminals. Its bandgap core achieves low drift via curvature compensation and is optimized for operation from 30 µA minimum current up to 12 mA.
It exhibits unconditionally stable behavior with capacitive loads up to 10 nF due to internal compensation, eliminating need for external series resistance. Temperature coefficient is characterized over –40°C to +125°C using the standard TC formula defined in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.225 V ±1% (D grade); defines precise bias point for ADC reference, sensor excitation, or DAC calibration. |
| Temp Coefficient | 20 ppm/°C typical; ensures ≤±0.3 mV drift over 0–70°C ambient, critical for portable measurement accuracy. |
| Knee Current | 30 µA; minimum current required to regulate - enables ultra-low-power sleep-mode reference retention. |
| Dynamic Impedance | 0.2–0.6 Ω at 1 mA; maintains tight regulation under fast load transients in data acquisition front-ends. |
| Noise (10Hz–10kHz) | 60 µVrms; limits added uncertainty in 16-bit+ ADC systems where reference noise dominates ENOB. |
| Capacitive Load Stability | Unconditional up to 10 nF; allows direct connection to sampling capacitors without oscillation risk. |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 2.80–3.04 mm × 2.10–2.64 mm × 1.12 mm max height, 8 mm tape width, 3000 units per 7-inch reel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode / Cathode (floating or tied to Pin 2) | Internally unused; may be left open or shorted to Pin 2 to reduce leakage path variability. |
| Pin 2 | Cathode | Connected to system ground or low-impedance return; sinks regulated current from external bias resistor. |
| Pin 3 | Anode | Connected to positive supply rail via current-setting resistor; voltage at this node is clamped to 1.225 V. |
Key Features
| Feature | Design Value |
|---|---|
| Shunt topology with floating Pin 1 | Enables flexible PCB layout and eliminates need for dedicated anode trace routing in space-constrained designs. |
| 0.5%/1%/2% tolerance grades | D-grade (1%) supports mid-precision applications like portable multimeters without requiring laser trimming infrastructure. |
| 20 ppm/°C tempco (typ) | Meets industrial-grade drift requirements without external compensation networks or oven control. |
| 30 µA knee current | Permits use with high-value bias resistors (>1 MΩ), reducing quiescent power in coin-cell–powered devices. |
| Green molding compound | Complies with RoHS and halogen-free standards (no Br, Sb), satisfying environmental compliance for global consumer shipments. |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld digital multimeter powered by two AAA cells with auto-ranging analog front-end. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225 V for 24-bit sigma-delta ADC reference input. Use Value: Enables ±0.01% full-scale accuracy over –10°C to +50°C without calibration, leveraging 20 ppm/°C tempco and 1% initial tolerance. | Use Scenario: Isolated industrial sensor node measuring thermocouple output with cold-junction compensation. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifier and SAR ADC reference buffer. Use Value: Delivers <60 µVrms noise floor and sub-1 Ω dynamic impedance to preserve SNR in 18-bit measurements at 100 kSPS. |
| Notebook System Monitoring | Portable Communication RF Bias |
Use Scenario: Embedded controller monitoring CPU core voltage, memory VDDQ, and battery fuel gauge in ultrabook platform. IC Role / Device Role / Timing Role: Low-quiescent reference for multi-channel voltage supervisor IC with window-comparator inputs. Use Value: Maintains regulation down to 30 µA, enabling always-on monitoring during S3/S4 sleep states without compromising battery life. | Use Scenario: LTE modem PA bias control loop requiring stable gate voltage reference under pulsed RF load. IC Role / Device Role / Timing Role: Shunt reference supplying reference voltage to DAC-driven op-amp that sets GaAs FET gate bias. Use Value: Unconditional stability into 5 nF DAC output capacitance prevents oscillation during RF burst transitions, ensuring consistent PA linearity. |
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); 50 ppm/°C max; 60 µA min operating current | Requires external resistor divider; higher tempco limits use in high-accuracy portable gear | Select when adjustable reference or legacy LM4041 footprint compatibility is mandatory |
| MAX6008AEUR+T | Fixed 1.25 V; 25 ppm/°C max; 35 µA min current; 1.5 µVp-p noise (0.1–10 Hz) | Higher initial accuracy (0.2%), but narrower operating current range and no SOT23-3 pinout | Prefer for ultra-low-noise DC-coupled sensor signal chains where 1.25 V matches system architecture |
Compared with LM4041CIM3X-ADJ and MAX6008AEUR+T, the ZXRE4041DFTC offers tighter fixed-voltage accuracy (1.225 V ±1%), lower knee current (30 µA), and guaranteed SOT23-3 pin compatibility - making it optimal for space-constrained, battery-sensitive applications demanding stable 1.225 V without adjustment overhead.
Availability
ZXRE4041DFTC is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition systems, and notebook system monitoring requiring stable component supply with RoHS-compliant packaging and full traceability.
Supply support for ZXRE4041DFTC 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, cost-optimized components for consumer, computing, and industrial markets.
The ZXRE4041 belongs to Diodes' precision reference product line, engineered specifically for micropower, low-drift shunt references in portable and space-constrained applications where SOT23 footprint and sub-1% tolerance are essential.
FAQ
What is the minimum operating current for ZXRE4041DFTC?
The ZXRE4041DFTC requires a minimum operating current of 30 µA to maintain regulation, verified per DS32169 Rev. 6–2 Section 5. This knee current enables ultra-low-power operation in battery-backed systems and allows use with high-value bias resistors exceeding 1 MΩ at 3.3 V supply.
Can ZXRE4041DFTC drive a 10 nF capacitive load without instability?
Yes - the ZXRE4041DFTC is unconditionally stable into capacitive loads up to 10 nF, as confirmed in the datasheet's "Capacitive Load Stability" section and typical characteristics plots. No series resistor or external compensation is needed, simplifying design in ADC sample-hold and DAC buffer circuits.
How does the 20 ppm/°C temperature coefficient translate to voltage drift over temperature?
With a typical 20 ppm/°C tempco and nominal 1.225 V output, the ZXRE4041DFTC drifts approximately ±0.245 mV over a 10°C change, or ±1.715 mV across –40°C to +125°C. This is calculated as 1.225 V × 20 × 10⁻⁶ × ΔT, matching the datasheet's TC definition and measured performance curves.
Is ZXRE4041DFTC pin-compatible with LM4041 variants?
Yes - ZXRE4041DFTC uses the same SOT23-3 pinout as LM4041 (Pin 2 = cathode, Pin 3 = anode), with Pin 1 floating or tied to Pin 2. It is explicitly positioned as a pin-for-pin alternative in the datasheet, supporting drop-in replacement in existing LM4041-based designs without layout changes.
ZXRE4041DFTC 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):
- 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
ZXRE4041DFTC FAQ
1.How can I place an order for ZXRE4041DFTC through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE4041DFTC 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 ZXRE4041DFTC reliable?
The price and inventory of ZXRE4041DFTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE4041DFTC is usually 5 days.
3.What payment methods are accepted for ZXRE4041DFTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE4041DFTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE4041DFTC?
ZXRE4041DFTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE4041DFTC 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 ZXRE4041DFTC?
For technical support, including ZXRE4041DFTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE4041DFTC requirements.
6.How does Aetrix verify that ZXRE4041DFTC is sourced from the original manufacturer or authorized distributors?
All ZXRE4041DFTC 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 ZXRE4041DFTC meets industry standards.
7.What is the process for return or replacement of ZXRE4041DFTC?
All ZXRE4041DFTC units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE4041DFTC, 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 ZXRE4041DFTC part is unused and in its original packaging.
Return procedure for ZXRE4041DFTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZXRE4041DFTC Tags
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