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Diodes Incorporated ZXRE1004DR
- Part No.:
- ZXRE1004DR
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
ZXRE1004DR.pdf
- Description:
- IC VREF SHUNT 1% TO92
- Quantity:
- Payment:
- Shipping:
Inventory:4,752
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Product details
Overview
ZXRE1004DR 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 over 8µA–20mA supply current and maintains stability with capacitive loads-ideal for precision low-power analog signal conditioning in portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the ZXRE1004DR datasheet, ZXRE1004DR pinout, ZXRE1004DR application, or ZXRE1004DR equivalent, key selection criteria include ultra-low quiescent current, tight thermal drift, unconditionally stable operation with capacitive loads, and SOT23 footprint compatibility with legacy references like LT1004 and REF1004.
Technical Context
The ZXRE1004DR functions as a two-terminal shunt voltage reference, requiring an external current source to bias its cathode and anode terminals. Its bandgap core delivers 1.22V nominal output with minimal curvature over temperature due to internal curvature compensation.
It exhibits unconditionally stable behavior up to 10nF capacitive load without oscillation, enabled by internal compensation and low dynamic impedance (0.2Ω typical at 1mA). The device's 75ppm/°C max TC and ±1mV voltage change across 8µA–1mA operating range support high-accuracy ADC/DAC biasing in embedded sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.22 V nominal; ±1% initial tolerance ensures ≤12.2 mV absolute error at 25°C for 12-bit ADC reference scaling. |
| Knee Current | 4 µA typical; enables operation from microcontroller GPIOs or ultra-low-power LDOs in energy-harvesting nodes. |
| Temp Coefficient | 20 ppm/°C typical; contributes ≤1.7 mV drift over –40°C to +85°C, critical for portable medical sensors. |
| Dynamic Impedance | 0.2 Ω typical at 1 mA; minimizes load-induced voltage sag during fast-sampling ADC conversions. |
| Noise (10Hz–10kHz) | 60 µVrms; supports 16-bit resolution in precision data loggers without external filtering. |
| Operating Current Range | 8 µA to 20 mA; accommodates both standby (µA) and active (mA) modes in dual-state power management. |
Pinout & Package
SOT23-3 package (JEDEC MO-178AA), 2.80–3.04 mm length, 1.20–1.40 mm width, 1.12 mm max height; surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Current sink input | Connected to system ground or current-setting resistor; reverse-biased configuration requires external current source into cathode. |
| Pin 2 (Cathode) | Reference output node | Provides stable 1.22V relative to Pin 1; serves as precision voltage source for ADC reference inputs or op-amp bias networks. |
| Pin 3 (NC / Floating) | No-connect terminal | Internally unconnected; must remain floating or tied to Pin 2 per Diodes' layout guidance to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Unconditional stability | Maintains regulation without oscillation under ≥10nF capacitive load-eliminates need for external isolation resistors in compact PCB layouts. |
| Ultra-low knee current | 4µA typical start-up threshold enables direct drive from nano-power comparators or leakage-limited bias networks. |
| Low dynamic impedance | 0.2Ω at 1mA ensures <0.2mV droop during 1mA transient load steps-critical for multi-channel simultaneous-sampling ADCs. |
| Wide operating current range | 8µA–20mA span allows single BOM item to serve both ultra-low-power sleep states and full-speed acquisition modes. |
Applications
| Battery-Powered Data Loggers | Precision Portable Multimeters |
|---|---|
Use Scenario: Continuous 24-hour environmental monitoring using coin-cell battery and 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.22V reference for ADC conversion accuracy. Use Value: 4µA knee current extends battery life beyond 5 years; 20ppm/°C TC ensures <±2 LSB error across operating temperature. | Use Scenario: Handheld multimeter with auto-ranging and 4½-digit display requiring consistent reference across ranges. IC Role / Device Role / Timing Role: Primary voltage reference for dual-slope integrator and reference divider network. Use Value: 1% initial tolerance and <1mV current-induced drift enable factory calibration retention over 2-year service intervals. |
| Wireless Sensor Node ADC Bias | Industrial Loop-Powered Transmitters |
Use Scenario: Sub-GHz IoT node measuring thermocouple and RTD signals with intermittent BLE transmission. IC Role / Device Role / Timing Role: Low-noise reference for PGA and SAR ADC front-end during active sensing bursts. Use Value: 60µVrms noise floor supports >90dB SNR; SOT23 footprint fits within 8mm² RF module keep-out zone. | Use Scenario: 4–20mA transmitter with HART modulation, powered from loop with <4mA available for electronics. IC Role / Device Role / Timing Role: Reference source for DAC and current-sense amplifier offset calibration. Use Value: 8µA minimum operating current allows full functionality even at 3.8mA loop budget; 0.2Ω ZOUT prevents HART signal distortion. |
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, 1.5% tolerance, 50ppm/°C max TC, TO-92 package | Requires through-hole assembly; higher TC limits use in wide-temperature industrial sensors | Select when legacy TO-92 footprint or higher current capability (up to 25mA) is required |
| REF1004CM | 1.2V nominal, 0.5% tolerance, 25ppm/°C max TC, SO-8 package | Larger SO-8 footprint; higher cost; better initial accuracy but worse thermal stability than ZXRE1004DR | Select when tighter initial tolerance outweighs board space and thermal drift constraints |
Compared with LT1004CZ-1.2 and REF1004CM, the ZXRE1004DR offers superior thermal stability and smallest footprint, making it optimal for space-constrained, battery-operated designs where long-term drift matters more than sub-0.5% initial accuracy.
Availability
ZXRE1004DR is available at Aetrix Electronics and suitable for battery-powered equipment, precision portable instrumentation, and industrial data acquisition systems requiring stable component supply with guaranteed long-term availability.
Supply support for ZXRE1004DR 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, energy-efficient components for industrial, computing, and consumer markets.
The ZXRE1004DR belongs to Diodes' precision voltage reference product line, engineered specifically for ultra-low-power, high-stability analog signal chains in portable and remote-sensing applications.
FAQ
What is the recommended external current source configuration for ZXRE1004DR?
A series resistor between supply rail and cathode (Pin 2) sets operating current; value calculated as R = (VSUPPLY − 1.22V) / IOP. For 10µA operation from 3.3V, use 208kΩ. Anode (Pin 1) connects directly to ground. Pin 3 must remain floating or tied to Pin 2 per Diodes' layout guidelines to prevent noise coupling.
Can ZXRE1004DR drive a 1000pF capacitive load without instability?
Yes-ZXRE1004DR is unconditionally stable up to 10nF (10,000pF) capacitive load per datasheet Figure 5. At 1000pF, no external series resistance or isolation is needed, enabling direct connection to ADC reference inputs or op-amp non-inverting terminals without phase-margin concerns.
How does ZXRE1004DR's 4µA knee current impact system power budget?
The 4µA knee current defines the minimum bias current needed to establish regulation. Below this, output voltage collapses nonlinearly. In systems with 10µA total standby budget, ZXRE1004DR consumes <40% of available current-enabling concurrent use with nano-power MCUs and RTCs while retaining reference integrity.
Is ZXRE1004DR qualified for automotive applications?
No-ZXRE1004DR is not AEC-Q100 qualified. Diodes explicitly states that automotive-grade variants require separate qualification (PPAP, IATF 16949 manufacturing, AEC-Q100/101 testing); this part is intended for commercial/industrial use only. For automotive, contact Diodes for qualified alternatives such as the AP431x series.
ZXRE1004DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bulk
- 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:
- TO-92
ZXRE1004DR FAQ
1.How can I place an order for ZXRE1004DR through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE1004DR 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 ZXRE1004DR reliable?
The price and inventory of ZXRE1004DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004DR is usually 5 days.
3.What payment methods are accepted for ZXRE1004DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE1004DR?
ZXRE1004DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE1004DR 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 ZXRE1004DR?
For technical support, including ZXRE1004DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004DR requirements.
6.How does Aetrix verify that ZXRE1004DR is sourced from the original manufacturer or authorized distributors?
All ZXRE1004DR 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 ZXRE1004DR meets industry standards.
7.What is the process for return or replacement of ZXRE1004DR?
All ZXRE1004DR units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004DR, 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 ZXRE1004DR part is unused and in its original packaging.
Return procedure for ZXRE1004DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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