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Diodes Incorporated ZXRE1004CFTC
- Part No.:
- ZXRE1004CFTC
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXRE1004CFTC.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,860
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Product details
Overview
ZXRE1004CFTC from Diodes Incorporated is a 1.22 V bandgap voltage reference IC with 4 µA typical knee current, 20 ppm/°C typical temperature coefficient, and ±0.5% initial tolerance in SOT23 package-designed for ultra-low-power precision biasing in portable instrumentation and battery-powered A/D converters.
For engineers reviewing the ZXRE1004CFTC datasheet, ZXRE1004CFTC pinout, ZXRE1004CFTC application, or ZXRE1004CFTC equivalent, key selection criteria include microamp-level operating current, tight thermal drift performance, unconditional stability with capacitive loads, and compatibility with space-constrained PCB layouts requiring SOT23 footprint.
Technical Context
The ZXRE1004CFTC operates as a two-terminal shunt reference, sinking current from an external resistor to ground to maintain a stable 1.22 V reverse breakdown voltage. Its bandgap core achieves low drift via curvature compensation, and its output remains stable across 8 µA–20 mA load current range without external compensation.
It exhibits unconditionally stable behavior up to 10 nF capacitive load and delivers 60 µV(rms) wideband noise (10 Hz–10 kHz) at 8 µA–100 µA bias-enabling direct use in high-resolution SAR ADC reference buffers and low-noise sensor signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.22 V nominal; ±0.5% initial tolerance ensures ≤6.1 mV absolute error at 25°C for precision calibration. |
| Knee Current | 4 µA typical; enables operation from high-value bias resistors, reducing quiescent power in coin-cell applications. |
| Tempco | 20 ppm/°C typical; limits voltage drift to ±1.7 mV over –40°C to +85°C ambient, critical for field-deployed sensors. |
| Operating Current Range | 8 µA to 20 mA; supports wide dynamic headroom while maintaining regulation-ideal for variable-load data acquisition systems. |
| Dynamic Impedance | 0.2 Ω typical at 1 mA; minimizes load-induced voltage shift during fast-switching ADC sampling events. |
| Noise (10 Hz–10 kHz) | 60 µV(rms); sufficiently low to avoid degrading ENOB in 16-bit+ successive-approximation converters. |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 2.80–3.04 mm × 2.10–2.64 mm footprint, 1.12 mm max height, with gull-wing leads. Pin 1 is anode (input), Pin 2 is cathode (output/reference), Pin 3 is NC (no internal connection) but may be tied to Pin 2 per layout guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to positive supply rail via current-setting resistor; defines bias path into reference core. |
| Pin 2 | Cathode / Reference Output | Provides stable 1.22 V node; must be decoupled locally when driving ADC reference inputs or op-amp bias networks. |
| Pin 3 | No Connect (NC) | Internally unconnected; may be left floating or tied to Pin 2 for mechanical stability-no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Microamp knee current | Enables <1 µW quiescent dissipation at 1.22 V, extending shelf life of primary lithium batteries by years. |
| Unconditional stability | Operates reliably with ≥10 nF ceramic bypass capacitance-eliminates need for series isolation resistors in compact layouts. |
| Low dynamic impedance | 0.2 Ω at 1 mA ensures <200 µV load regulation error across 10 µA step changes-critical for multi-channel simultaneous-sampling ADCs. |
| RoHS/Green compliance | Fully lead-free, halogen-free, and antimony-free per Diodes' "Green" definition (<900 ppm Br/Cl, <1000 ppm Sb), supporting global environmental compliance programs. |
Applications
| Portable Instrumentation | Battery-Powered Sensors |
|---|---|
Use Scenario: Handheld multimeter with auto-ranging and 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and scaling for analog front-end and ADC reference input. Use Value: 0.5% tolerance and 20 ppm/°C tempco ensure calibrated accuracy across temperature without factory recalibration. | Use Scenario: Wireless soil moisture node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Precision bias source for low-power op-amp sensor interface and ADC reference. Use Value: 4 µA knee current allows >10-year battery life at 1-sample-per-minute duty cycle. |
| Precision Data Acquisition | Portable Communication Devices |
Use Scenario: Industrial handheld logger with 24-bit delta-sigma ADC and isolated RS-485 interface. IC Role / Device Role / Timing Role: Low-noise reference for ADC and excitation for bridge-based strain gauges. Use Value: 60 µV(rms) noise floor preserves >110 dB SNR in 100 kSPS acquisition mode. | Use Scenario: Bluetooth LE headset with integrated audio ADC/DAC and battery fuel gauge. IC Role / Device Role / Timing Role: Stable reference for Li-ion battery voltage monitoring and audio codec biasing. Use Value: Tight tolerance and low tempco enable accurate state-of-charge estimation across operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF1004CMX-1.2 | Same 1.22 V nominal, 0.5% tolerance, but 10 µA knee current and 50 ppm/°C max tempco. | Higher power consumption and wider drift limit suitability for less demanding portable designs. | Select when legacy REF1004 footprint compatibility is required and tighter tempco is not critical. |
| LT1004CZ-1.2 | 1.2 V nominal, 1% tolerance, 50 ppm/°C max tempco, 10 µA knee current, TO-92 package only. | Larger through-hole package and looser specs restrict use to non-portable, cost-sensitive industrial controls. | Choose only for TO-92 board reuse or where RoHS/Green compliance is not mandated. |
Compared with REF1004CMX-1.2 and LT1004CZ-1.2, the ZXRE1004CFTC delivers lower knee current (4 vs. 10 µA), tighter tempco (20 vs. 50 ppm/°C), and SOT23 surface-mount compatibility-making it optimal for next-generation space- and power-constrained portable electronics.
Availability
ZXRE1004CFTC is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered sensors, and precision data acquisition systems requiring stable component supply with guaranteed long-term availability.
Supply support for ZXRE1004CFTC 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-efficiency power management, signal integrity, and precision analog solutions.
The ZXRE1004 belongs to Diodes' precision voltage reference product line, engineered specifically for ultra-low-power, high-stability biasing in portable and battery-operated measurement systems.
FAQ
What is the minimum operating current for stable regulation of ZXRE1004CFTC?
The ZXRE1004CFTC achieves stable regulation starting at 4 µA typical knee current, with full specification compliance across 8 µA to 20 mA. Below 8 µA, output voltage remains functional but may deviate beyond ±0.5% tolerance-verified per DS32172 Rev. 5 electrical characteristics table.
Can ZXRE1004CFTC drive a 10 nF capacitor directly without oscillation?
Yes-the device is unconditionally stable with capacitive loads up to at least 10 nF, as confirmed in the datasheet's "unconditionally stable" feature statement and typical characteristics plots. No series resistor or isolation network is required for standard ceramic decoupling.
Is ZXRE1004CFTC pin-compatible with LT1004 or REF1004 in SOT23?
No-LT1004 is only available in TO-92 (E-Line), and REF1004CMX uses SOT23 but with different pin 3 functionality (not NC). ZXRE1004CFTC Pin 3 is NC; REF1004CMX Pin 3 is cathode. Direct replacement requires PCB redesign unless using ZXRE1004's E-Line variant (ZXRE1004CR).
Does ZXRE1004CFTC meet automotive qualification standards?
No-the ZXRE1004CFTC is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives (e.g., AP2112K) but explicitly states that ZXRE1004 variants require direct consultation with their automotive team for PPAP-capable, IATF 16949-manufactured versions.
ZXRE1004CFTC 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):
- 1.22V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 75ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 60µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 8 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXRE1004CFTC FAQ
1.How can I place an order for ZXRE1004CFTC through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE1004CFTC 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 ZXRE1004CFTC reliable?
The price and inventory of ZXRE1004CFTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004CFTC is usually 5 days.
3.What payment methods are accepted for ZXRE1004CFTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004CFTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE1004CFTC?
ZXRE1004CFTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE1004CFTC 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 ZXRE1004CFTC?
For technical support, including ZXRE1004CFTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004CFTC requirements.
6.How does Aetrix verify that ZXRE1004CFTC is sourced from the original manufacturer or authorized distributors?
All ZXRE1004CFTC 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 ZXRE1004CFTC meets industry standards.
7.What is the process for return or replacement of ZXRE1004CFTC?
All ZXRE1004CFTC units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004CFTC, 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 ZXRE1004CFTC part is unused and in its original packaging.
Return procedure for ZXRE1004CFTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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