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Diodes Incorporated ZXRE1004DRSTOB
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- Part No.:
- ZXRE1004DRSTOB
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- E-Line-3
- Datasheet:
-
ZXRE1004DRSTOB.pdf
- Description:
- IC VREF SHUNT 1% E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:3,348
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Product details
Overview
ZXRE1004DRSTOB from Diodes Incorporated is a micropower (4µA typical knee current), 1.22V bandgap voltage reference in SOT23 package, with 1% initial tolerance and 20ppm/°C typical temperature coefficient. It operates stably from 8µA to 20mA supply current and supports precision analog functions in space-constrained, battery-powered systems such as portable instrumentation and data acquisition.
For engineers reviewing the ZXRE1004DRSTOB datasheet, ZXRE1004DRSTOB pinout, ZXRE1004DRSTOB application, or ZXRE1004DRSTOB equivalent, key selection criteria include ultra-low quiescent current, capacitive-load immunity, tight thermal drift, and compatibility with legacy references like LT1004 and LM385 in SOT23 footprint.
Technical Context
The ZXRE1004DRSTOB implements a two-terminal shunt-mode bandgap reference architecture, requiring external current source biasing and delivering stable 1.22V output across 8µA–20mA operating range. Its unconditionally stable design tolerates unlimited capacitive loading without oscillation.
It achieves 20ppm/°C typical temperature coefficient over –40°C to +85°C via curvature-compensated bandgap core and laser-trimmed resistive elements. Reverse breakdown voltage variation is specified at ±1% (1.208V to 1.232V) at 25°C with IR = 100µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.22 V nominal; ±1% tolerance ensures ≤12.2 mV absolute error at 25°C for precision ADC/DAC biasing |
| Knee Current | 4 µA typical; enables operation from micro-power sources like coin cells or energy-harvesting circuits |
| Temp Coefficient | 20 ppm/°C typical; limits drift to ≤1.7 mV over –40°C to +85°C ambient range |
| Operating Current | 8 µA to 20 mA; supports wide dynamic range while maintaining regulation and noise performance |
| Dynamic Impedance | 0.2 Ω typical at 1 mA; minimizes load-induced voltage shift in high-precision feedback paths |
| Wideband Noise | 60 µV(rms) (10 Hz–10 kHz); suitable for 16-bit+ data converters without additional filtering |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 2.80 × 2.64 × 1.12 mm body, surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Current sink input | Receives external bias current; connected to positive rail via series resistor in shunt configuration |
| Cathode (Pin 2) | Reference output / ground reference | Provides regulated 1.22V relative to system ground; serves as precision voltage node for ADC REF, DAC bias, or comparator threshold |
| No-connect (Pin 3) | Unused terminal | Internally floating; must be left unconnected per datasheet - not tied to Pin 1 or ground |
Key Features
| Feature | Design Value |
|---|---|
| Unconditional stability | Maintains regulation with any capacitive load (0–∞), eliminating need for external compensation in portable designs |
| Ultra-low knee current | 4 µA typical start-up current enables use in sub-10 µA power budgets without sacrificing accuracy |
| Shunt topology | Two-terminal operation simplifies PCB layout and supports floating or ground-referenced configurations |
| RoHS/Green compliance | Fully lead-free, halogen-free, and antimony-free per EU directives - qualified for consumer and industrial end-equipment |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and coin-cell power source. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.22V reference for ADC full-scale calibration. Use Value: 4 µA knee current extends battery life >1 year; 20ppm/°C TC ensures <0.01% reading drift across field temperature range. | Use Scenario: Industrial sensor node digitizing thermocouple outputs via low-noise PGA and 18-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Low-noise (60 µVrms), stable reference for ADC reference input and PGA gain-setting network. Use Value: 0.2 Ω dynamic impedance prevents gain error under varying digital load transients; unconditionally stable with 100nF decoupling cap. |
| Portable Communication Devices | Notebook Power Management |
Use Scenario: Bluetooth LE audio headset requiring accurate battery voltage monitoring and RF bias control. IC Role / Device Role / Timing Role: Reference for dual-channel 12-bit ADC measuring battery voltage and microphone bias level. Use Value: 1% initial tolerance eliminates factory calibration; SOT23 footprint saves board area in 3×3 mm module layout. | Use Scenario: Ultrabook motherboard monitoring 3.3V, 5V, and 12V rails using multi-channel supervisor IC. IC Role / Device Role / Timing Role: Precision reference for internal ADC of voltage monitor IC (e.g., TI TPS3808). Use Value: Stable 1.22V enables ±0.5% rail measurement accuracy across temperature; compatible with existing REF1004-based BOMs. |
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 | 1.2V nominal, 1% tolerance, 50ppm/°C TC, 10µA knee current, TO-92 package | Through-hole mounting; higher TC and knee current limit low-power portables | Select when legacy TO-92 footprint required and thermal drift budget allows ≥50ppm/°C |
| LM385BZ-1.2 | 1.235V nominal, 1% tolerance, 100ppm/°C TC, 20µA knee current, TO-92 | Higher nominal voltage and TC; less suitable for 16-bit+ systems below 85°C | Choose only for cost-sensitive, non-precision applications where 1.235V offset and wider drift acceptable |
Compared with LT1004CZ-1.2 and LM385BZ-1.2, the ZXRE1004DRSTOB delivers tighter thermal stability (20 vs. 50/100 ppm/°C), lower operating current (4µA vs. 10/20µA), and SOT23 surface-mount compatibility - making it optimal for modern compact, battery-critical designs requiring long-term accuracy.
Availability
ZXRE1004DRSTOB is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition, and portable communication devices requiring stable component supply with verified micropower performance and RoHS compliance.
Supply support for ZXRE1004DRSTOB 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 the Americas.
The ZXRE1004 belongs to Diodes' precision voltage reference product line, engineered specifically for ultra-low-power, high-stability analog signal conditioning in portable and energy-constrained systems.
FAQ
What is the correct biasing configuration for ZXRE1004DRSTOB?
The ZXRE1004DRSTOB is a two-terminal shunt reference: connect anode (Pin 1) to the positive supply through a current-setting resistor, and cathode (Pin 2) to system ground. Pin 3 is internally unconnected and must remain floating. Minimum bias current is 8µA; typical operating current is 100µA–1mA for optimal noise and stability.
Does ZXRE1004DRSTOB require an output capacitor?
No external capacitor is required for stability - the device is unconditionally stable with any capacitive load, including 0–10µF ceramic or tantalum types. Adding a 100nF capacitor at the cathode improves high-frequency PSRR but does not affect loop stability or regulation integrity.
How does ZXRE1004DRSTOB compare to REF1004 in SOT23 form factor?
ZXRE1004DRSTOB matches REF1004's 1.2V nominal output and SOT23-3 footprint but offers tighter 20ppm/°C TC (vs. REF1004's 50ppm/°C), lower 4µA knee current (vs. 10µA), and improved 60µVrms noise (vs. REF1004's 80µVrms). It is pin-compatible and functionally superior in micropower precision applications.
Is ZXRE1004DRSTOB qualified for automotive use?
No - ZXRE1004DRSTOB is not AEC-Q100 qualified and is intended for industrial and consumer applications. Diodes offers automotive-grade alternatives (e.g., AP2112K) for safety-critical systems; contact Diodes marketing for AEC-Q100-compliant voltage reference options.
ZXRE1004DRSTOB 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:
- ±1%
- 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)
ZXRE1004DRSTOB FAQ
1.How can I place an order for ZXRE1004DRSTOB through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE1004DRSTOB 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 ZXRE1004DRSTOB reliable?
The price and inventory of ZXRE1004DRSTOB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004DRSTOB is usually 5 days.
3.What payment methods are accepted for ZXRE1004DRSTOB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004DRSTOB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE1004DRSTOB?
ZXRE1004DRSTOB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE1004DRSTOB 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 ZXRE1004DRSTOB?
For technical support, including ZXRE1004DRSTOB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004DRSTOB requirements.
6.How does Aetrix verify that ZXRE1004DRSTOB is sourced from the original manufacturer or authorized distributors?
All ZXRE1004DRSTOB 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 ZXRE1004DRSTOB meets industry standards.
7.What is the process for return or replacement of ZXRE1004DRSTOB?
All ZXRE1004DRSTOB units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004DRSTOB, 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 ZXRE1004DRSTOB part is unused and in its original packaging.
Return procedure for ZXRE1004DRSTOB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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