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Diodes Incorporated ZXRE1004CFTA
- Part No.:
- ZXRE1004CFTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXRE1004CFTA.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,010
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Product details
Overview
ZXRE1004CFTA from Diodes Incorporated is a precision 1.22 V bandgap voltage reference IC operating at 4 µA typical knee current, with 0.5% initial tolerance and 20 ppm/°C typical temperature coefficient, housed in a SOT23 package-designed for ultra-low-power battery-powered instrumentation and portable A/D converters.
For engineers reviewing the ZXRE1004CFTA datasheet, ZXRE1004CFTA pinout, ZXRE1004CFTA application, or ZXRE1004CFTA equivalent, this page delivers verified electrical specs, real-world use cases, validated alternatives, and supply-ready procurement support for space-constrained, low-current analog systems.
Technical Context
The ZXRE1004CFTA functions as a two-terminal shunt reference, requiring external current sourcing to establish bias. Its bandgap core delivers stable 1.22 V output across 8 µA–20 mA operating current range, with unconditionally stable performance into capacitive loads up to 10 nF without external compensation.
It achieves high accuracy via laser-trimmed resistor networks enabling 0.5% initial tolerance and maintains low drift (20 ppm/°C typ.) over –40°C to +85°C, making it suitable for precision data acquisition where thermal stability and minimal quiescent current are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.22 V ±0.5% at 100 µA - defines absolute accuracy of analog signal scaling and ADC/DAC biasing |
| Knee Current | 4 µA typical - minimum bias current needed to enter regulation, enabling micro-power system design |
| Temp Coefficient | 20 ppm/°C typical - ensures ≤0.17 mV drift over 0°C–70°C ambient, critical for portable sensor front-ends |
| Operating Current | 8 µA to 20 mA - wide compliance range supports both ultra-low-power sleep modes and higher-accuracy active operation |
| Dynamic Impedance | 0.2 Ω typical at 1 mA - minimizes output voltage perturbation under dynamic load transients |
| Wideband Noise | 60 µV(rms) (10 Hz–10 kHz) - low noise floor preserves SNR in precision measurement circuits |
Pinout & Package
SOT23-3 package (JEDEC MO-178AA), 2.80 × 2.64 × 1.12 mm body, gull-wing leads, RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Current Sink Input | Accepts external bias current; connects to positive rail via series resistor in shunt configuration |
| Pin 2 (Cathode) | Reference Output / Ground Reference | Provides regulated 1.22 V relative to system ground; must be tied to GND for proper operation |
| Pin 3 (NC) | No Connect | Internally floating; no electrical function-must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low knee current | 4 µA typical enables operation from nanoampere-level bias sources in energy-harvesting systems |
| Unconditional stability | Stable with ≥0 pF to 10 nF capacitive loads-eliminates need for external compensation in compact PCB layouts |
| Laser-trimmed tolerance | 0.5% initial accuracy reduces calibration overhead in factory programming of portable medical devices |
| Low dynamic impedance | 0.2 Ω at 1 mA minimizes voltage droop during fast-switching ADC sampling bursts |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter measuring 0–200 mV DC signals with 16-bit resolution. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.22 V reference for sigma-delta ADC input scaling. Use Value: 0.5% tolerance and 20 ppm/°C TC ensure <±0.05% full-scale error across operating temperature without recalibration. | Use Scenario: Wireless sensor node logging temperature and humidity with 12-bit SAR ADC. IC Role / Device Role / Timing Role: Low-quiescent-current reference supplying bias to ADC internal reference buffer. Use Value: 4 µA knee current extends battery life to >5 years on CR2032 when paired with duty-cycled MCU. |
| Portable Communication Devices | Notebook Power Management |
Use Scenario: Bluetooth LE audio earbud with integrated analog microphone preamp and ADC. IC Role / Device Role / Timing Role: Reference source for microphone bias and ADC full-scale range in mixed-signal SoC interface. Use Value: 60 µV(rms) noise floor prevents audible hiss in 20–20 kHz audio band during quiet listening conditions. | Use Scenario: Ultrabook system power rail monitoring using discrete ADC for +1.8 V, +3.3 V, and +5 V rails. IC Role / Device Role / Timing Role: Primary reference for multi-channel rail monitor IC requiring stable, low-drift excitation. Use Value: Stable 1.22 V output with <1 mV total drift over –10°C to +60°C ensures ±0.5% rail measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1004CZ-1.2 | 1.2 V nominal, 1% tolerance, 50 ppm/°C TC, TO-92 package | Higher drift and looser tolerance; requires through-hole layout and larger board area | Select when legacy TO-92 footprint compatibility is required and 0.5% accuracy is not mandatory |
| REF1004CM | 1.2 V nominal, 0.5% tolerance, 25 ppm/°C TC, SO-8 package | Larger SO-8 footprint and higher 10 µA knee current limit system standby current | Choose only if existing SO-8 layout exists and SOT23 rework is prohibitive |
Compared with LT1004CZ-1.2 and REF1004CM, the ZXRE1004CFTA delivers tighter tolerance and lower temperature drift in a miniature SOT23 package while consuming half the knee current-making it optimal for new designs prioritizing size, accuracy, and battery longevity.
Availability
ZXRE1004CFTA is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition, and portable communication devices requiring stable component supply with guaranteed traceability and lifecycle continuity.
Supply support for ZXRE1004CFTA 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, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The ZXRE1004 belongs to Diodes' precision analog reference product line, engineered specifically for ultra-low-power, high-accuracy voltage referencing in portable and space-constrained systems.
FAQ
What is the correct biasing configuration for ZXRE1004CFTA?
The ZXRE1004CFTA operates as a two-terminal shunt reference: Pin 1 (anode) connects to the positive supply via a current-setting resistor, and Pin 2 (cathode) connects to system ground. Pin 3 is NC and must remain unconnected. The device regulates by sinking current to maintain 1.22 V across its terminals.
Can ZXRE1004CFTA drive a 10 kΩ load directly?
No-ZXRE1004CFTA is a shunt reference and does not source current. It requires an external current source (e.g., series resistor from VCC) to establish operating current. Load current must be supplied separately; the reference itself sinks only bias and error current, up to 20 mA maximum.
Is ZXRE1004CFTA qualified for automotive applications?
No-ZXRE1004CFTA is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives (e.g., AP2112K) but explicitly states that ZXRE1004 variants are intended for commercial/industrial use only. For automotive designs, contact Diodes' automotive team for qualified equivalents.
Why does the datasheet list ZXRE1004CFTA as "Obsolete"?
Per Diodes' ordering information table, ZXRE1004CFTA is marked "Obsolete" due to end-of-life status for the 0.5% tolerance variant. However, Aetrix Electronics maintains active inventory and supply chain support for this part number to serve legacy designs and long-lifecycle industrial programs requiring exact form-fit-function replacement.
ZXRE1004CFTA 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
ZXRE1004CFTA FAQ
1.How can I place an order for ZXRE1004CFTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE1004CFTA 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 ZXRE1004CFTA reliable?
The price and inventory of ZXRE1004CFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004CFTA is usually 5 days.
3.What payment methods are accepted for ZXRE1004CFTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004CFTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE1004CFTA?
ZXRE1004CFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE1004CFTA 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 ZXRE1004CFTA?
For technical support, including ZXRE1004CFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004CFTA requirements.
6.How does Aetrix verify that ZXRE1004CFTA is sourced from the original manufacturer or authorized distributors?
All ZXRE1004CFTA 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 ZXRE1004CFTA meets industry standards.
7.What is the process for return or replacement of ZXRE1004CFTA?
All ZXRE1004CFTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004CFTA, 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 ZXRE1004CFTA part is unused and in its original packaging.
Return procedure for ZXRE1004CFTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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