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Diodes Incorporated ZXRE1004FRSTOB
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- Part No.:
- ZXRE1004FRSTOB
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- E-Line-3
- Datasheet:
-
ZXRE1004FRSTOB.pdf
- Description:
- IC VREF SHUNT 3% E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:3,323
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Product details
Overview
ZXRE1004FRSTOB from Diodes Incorporated is a 1.22 V bandgap voltage reference IC designed for ultra-low-power operation at 4 µA typical knee current, with 1% initial tolerance and 20 ppm/°C typical temperature coefficient, housed in a SOT23-3 package and optimized for battery-powered precision analog signal conditioning.
For engineers reviewing the ZXRE1004FRSTOB datasheet, ZXRE1004FRSTOB pinout, ZXRE1004FRSTOB application, or ZXRE1004FRSTOB equivalent, key selection criteria include microamp-level operating current, capacitive-load stability, tight thermal drift, and compatibility with legacy 3-pin reference footprints such as LT1004 and REF1004.
Technical Context
The ZXRE1004FRSTOB operates as a two-terminal shunt reference with reverse-breakdown topology, requiring an external current source and delivering stable 1.22 V output across 8 µA–20 mA load current range. Its internal bandgap core achieves low TC via curvature compensation and laser-trimmed resistors.
It exhibits unconditional stability with capacitive loads up to 10 nF and maintains <1 mV voltage change over its full operating current range (8 µA to 1 mA), while dynamic impedance remains ≤0.6 Ω at 1 mA test current and 100 Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.22 V ±1% at 25°C; defines precise DC bias point for ADCs, DACs, and sensor interfaces |
| Knee Current | 4 µA typical; minimum current needed to establish regulation-enables ultra-low-power sleep-mode reference |
| Temp Coefficient | 20 ppm/°C typical; ensures ≤±1.7 mV drift over –40°C to +85°C ambient range |
| Operating Current | 8 µA to 20 mA; supports wide dynamic range without loss of accuracy or stability |
| Dynamic Impedance | 0.6 Ω max at 1 mA / 100 Hz; minimizes AC error coupling into sensitive analog circuits |
| Noise (10Hz–10kHz) | 60 µVrms; low enough for 16-bit+ data acquisition without added filtering |
Pinout & Package
SOT23-3 surface-mount package (1.12 mm height, 2.80 × 2.64 mm footprint) with gull-wing leads; RoHS-compliant, halogen-free, lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode (Input) | Current input node; connects to series resistor from supply rail |
| Pin 2 | Cathode (Output) | Regulated 1.22 V reference output; also serves as ground return for load |
| Pin 3 | NC / Floating | No internal connection; may be left unconnected or tied to Pin 2 per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Microamp knee current | Enables operation from coin-cell or energy-harvesting sources without compromising regulation |
| Unconditional capacitive stability | Eliminates need for external compensation when driving ADC input caps or long PCB traces |
| Low dynamic impedance | Reduces load-induced voltage sag during fast-switching analog front-end sampling |
| Wide operating current range | Supports shared-current designs where reference and bias currents derive from same node |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with 20-hour battery life using CR2032 cell. IC Role / Device Role / Timing Role: Shunt voltage reference for 16-bit sigma-delta ADC front-end. Use Value: 4 µA knee current extends battery life by >3× versus standard 100 µA references. | Use Scenario: Industrial sensor node logging temperature and pressure at 100 Hz. IC Role / Device Role / Timing Role: Stable 1.22 V reference for ratiometric bridge excitation and ADC conversion. Use Value: 20 ppm/°C TC ensures <0.02% full-scale error across field temperature range. |
| Portable Communication Devices | Notebook Power Management |
Use Scenario: Bluetooth LE audio earbud with integrated analog mic preamp. IC Role / Device Role / Timing Role: Bias reference for low-noise op-amp gain stage feeding ADC. Use Value: 60 µVrms noise avoids degrading SNR in 96 dB audio path. | Use Scenario: Ultrabook system power rail monitor for CPU/GPU VRMs. IC Role / Device Role / Timing Role: Calibration reference for multi-channel voltage supervisor IC. Use Value: 1% initial tolerance enables single-point factory calibration without trimming. |
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 | Same 1.2 V nominal output; 50 ppm/°C TC (vs. 20 ppm/°C); 10 µA knee current | Higher drift limits use in extended-temperature industrial sensors | Prefer ZXRE1004FRSTOB for sub-5 µA systems or <30 ppm/°C requirements |
| REF1004CM | 1.2 V output; 100 ppm/°C TC; 10 µA knee current; TO-92 package only | TO-92 footprint incompatible with high-density SMT layouts | Choose ZXRE1004FRSTOB for SMT scalability and tighter thermal performance |
Compared with LT1004CZ-1.2 and REF1004CM, the ZXRE1004FRSTOB delivers superior thermal stability and lower operating current in a compact SOT23 package-critical for space-constrained, battery-sensitive designs where reference drift and quiescent power directly impact system lifetime and accuracy.
Availability
ZXRE1004FRSTOB is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition, and portable communication devices requiring stable component supply with guaranteed long-term sourcing.
Supply support for ZXRE1004FRSTOB 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 voltage reference product line, engineered specifically for ultra-low-power, high-stability analog subsystems in portable and energy-constrained applications.
FAQ
What is the recommended external current-limiting resistor for ZXRE1004FRSTOB at 3.3 V supply?
A 2.2 kΩ resistor delivers ~950 µA operating current-well within the 8 µA–20 mA range and sufficient to maintain regulation while minimizing self-heating. At this current, temperature coefficient remains near typical 20 ppm/°C, and dynamic impedance drops to ~0.2 Ω, improving load regulation.
Can ZXRE1004FRSTOB drive a 1000 pF capacitive load without oscillation?
Yes-the device is unconditionally stable with capacitive loads up to 10 nF per datasheet. Driving 1000 pF introduces no phase margin degradation or ringing, eliminating need for series isolation resistors in ADC sample-hold or sensor interface paths.
Is ZXRE1004FRSTOB qualified for automotive applications?
No-ZXRE1004FRSTOB is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives (e.g., AP2112K) but this variant is intended for commercial/industrial portable equipment. For automotive use, contact Diodes' automotive team for PPAP-capable equivalents.
How does the 1% tolerance affect calibration in a 12-bit ADC system?
At 1.22 V reference, ±1% tolerance equals ±12.2 mV error, translating to ±5 LSB in a 3.3 V full-scale 12-bit ADC. System-level calibration can correct this offset; the low TC and noise ensure residual error after calibration remains stable over time and temperature.
ZXRE1004FRSTOB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- E-Line-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:
- ±3%
- 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:
- Through Hole
- Supplier Device Package:
- E-Line (TO-92 compatible)
ZXRE1004FRSTOB FAQ
1.How can I place an order for ZXRE1004FRSTOB through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE1004FRSTOB 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 ZXRE1004FRSTOB reliable?
The price and inventory of ZXRE1004FRSTOB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004FRSTOB is usually 5 days.
3.What payment methods are accepted for ZXRE1004FRSTOB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004FRSTOB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE1004FRSTOB?
ZXRE1004FRSTOB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE1004FRSTOB 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 ZXRE1004FRSTOB?
For technical support, including ZXRE1004FRSTOB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004FRSTOB requirements.
6.How does Aetrix verify that ZXRE1004FRSTOB is sourced from the original manufacturer or authorized distributors?
All ZXRE1004FRSTOB 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 ZXRE1004FRSTOB meets industry standards.
7.What is the process for return or replacement of ZXRE1004FRSTOB?
All ZXRE1004FRSTOB units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004FRSTOB, 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 ZXRE1004FRSTOB part is unused and in its original packaging.
Return procedure for ZXRE1004FRSTOB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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