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Diodes Incorporated ZXRE1004FRSTOA
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- Part No.:
- ZXRE1004FRSTOA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- E-Line-3
- Datasheet:
-
ZXRE1004FRSTOA.pdf
- Description:
- IC VREF SHUNT 3% E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:3,047
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Product details
Overview
ZXRE1004FRSTOA 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 is unconditionally stable with capacitive loads-ideal for precision low-power analog signal conditioning in portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the ZXRE1004FRSTOA datasheet, ZXRE1004FRSTOA pinout, ZXRE1004FRSTOA application, or ZXRE1004FRSTOA equivalent, key selection criteria include ultra-low quiescent current, tight thermal drift, SOT23 footprint compatibility, and proven stability under varying load capacitance without external compensation.
Technical Context
The ZXRE1004FRSTOA implements a two-terminal shunt-mode bandgap reference architecture, requiring an external current source and operating as a precision voltage sink. Its design achieves 1.22V output regulation across 8µA–20mA input current and maintains ±0.5% output deviation over −40°C to +85°C.
It features unconditionally stable operation up to 10nF capacitive load without oscillation, enabled by internal compensation and low dynamic impedance (0.2Ω typical at 1mA). The device exhibits 60µV(rms) wideband noise (10Hz–10kHz) and reverse dynamic impedance of ≤0.6Ω, supporting high-accuracy ADC/DAC biasing and calibration circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.22 V nominal; tightly regulated ±1% at 25°C for precision analog scaling |
| Knee Current | 4 µA typical; enables operation from microamp-level bias sources in energy-constrained designs |
| Temp Coefficient | 20 ppm/°C typical; ensures <±2.5 mV drift over −40°C to +85°C for stable sensor excitation |
| Operating Current | 8 µA to 20 mA; supports wide-range biasing without performance degradation |
| Dynamic Impedance | 0.2 Ω typical at 1 mA; minimizes load-induced voltage error in precision feedback paths |
| Noise (10Hz–10kHz) | 60 µV(rms); low enough to avoid degrading 16-bit ADC effective resolution |
| Capacitive Load Stability | Unconditional up to 10 nF; eliminates need for series resistance or external compensation |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 2.80 × 2.10 × 1.12 mm body, gull-wing leads, RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Current Input / Cathode Reference Node | Connected to system supply via current-setting resistor; defines reference sink path |
| Pin 2 (Cathode) | Output / Reference Voltage Terminal | Provides stable 1.22V output; must be decoupled locally for noise-sensitive applications |
| Pin 3 (NC) | No Connect | Internally floating; no electrical connection-must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low knee current | 4 µA typical enables use with high-value bias resistors (>1MΩ) in coin-cell applications |
| Shunt topology with NC pin | Pin 3 is unconnected-simplifies PCB layout and avoids accidental shorting in compact layouts |
| Wide operating current range | 8 µA–20 mA allows same BOM part to serve both ultra-low-power sleep modes and active measurement phases |
| Low dynamic impedance | 0.2 Ω at 1 mA reduces load-regulation error to <200 µV per 100 µA load change |
| Capacitive-load immunity | Stable with up to 10 nF directly on cathode-supports direct coupling to ADC reference inputs without RC filters |
Applications
| Battery-Powered Data Loggers | Precision Portable Multimeters |
|---|---|
Use Scenario: Continuous low-power voltage monitoring of Li-ion cells over multi-week deployments. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.22V reference for 16-bit sigma-delta ADC front-end. Use Value: 4µA knee current extends battery life beyond 1 year on CR2032; 20ppm/°C TC ensures <0.5% measurement drift across field temperature ranges. | Use Scenario: Handheld multimeter requiring accurate DCV and ohms ranges with auto-ranging. IC Role / Device Role / Timing Role: Primary reference for dual-slope integrator and auto-zero amplifier stages. Use Value: Unconditional stability with 4.7nF integrator capacitor eliminates calibration drift; 1% tolerance meets Class II accuracy requirements. |
| Medical Wearable Sensor Nodes | Industrial Loop-Powered Transmitters |
Use Scenario: ECG front-end with ultra-low-power analog signal chain powered by single AAA cell. IC Role / Device Role / Timing Role: Bias reference for instrumentation amplifier and ADC reference buffer. Use Value: 60µV(rms) noise preserves SNR >85dB; SOT23 footprint fits sub-10mm² PCB area constraints. | Use Scenario: 4–20mA transmitter with HART modulation, operating from 12–42V loop supply. IC Role / Device Role / Timing Role: Precision shunt reference for DAC output scaling and current sense calibration. Use Value: Stable operation across full 8µA–20mA current range accommodates HART AC superposition without reference perturbation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431AIDBVR | Adjustable (2.5V min), 80µA typical IQ, 50ppm/°C TC, 3-pin adjustable topology | Requires external resistive divider; less suitable for fixed 1.22V use without added components | Select when adjustable reference or higher output voltage is required; not drop-in for 1.22V fixed use |
| LM385BZ-1.2 | Fixed 1.235V, 10µA knee current, 100ppm/°C TC, TO-92 package | Larger footprint, higher thermal drift, and higher minimum current limit system power budget | Choose only if legacy TO-92 mounting is mandatory; inferior tempco and current efficiency vs. ZXRE1004 |
Compared with TLVH431AIDBVR and LM385BZ-1.2, the ZXRE1004FRSTOA delivers superior thermal stability, lower operating current, and true 1.22V fixed output in a space-optimized SOT23-making it optimal for new battery-critical designs where precision and size are co-constrained.
Availability
ZXRE1004FRSTOA 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 sourcing.
Supply support for ZXRE1004FRSTOA 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 ZXRE1004 belongs to Diodes' precision voltage reference product line, engineered specifically for ultra-low-power, high-stability analog signal conditioning in portable and battery-operated systems.
FAQ
What is the maximum capacitive load the ZXRE1004FRSTOA can drive without instability?
The ZXRE1004FRSTOA is unconditionally stable with capacitive loads up to 10 nF, as confirmed in the DS32172 datasheet Typical Characteristics section and Absolute Maximum Ratings notes. This eliminates the need for series resistance or external compensation networks when driving ADC reference inputs or op-amp bias nodes.
Can ZXRE1004FRSTOA replace LT1004CN8-1.2 in existing designs?
Yes-ZXRE1004FRSTOA is pin-compatible with LT1004CN8-1.2 in SOT23-3 footprint and provides tighter 1% tolerance (vs. LT1004's 2%), lower 4µA knee current (vs. 10µA), and better 20ppm/°C tempco (vs. 50ppm/°C). No layout changes are needed, but verify operating current stays within 8µA–20mA range.
Does ZXRE1004FRSTOA require an external current-limiting resistor?
Yes-it is a two-terminal shunt reference and must be biased with an external current-setting resistor between supply and Pin 1 (anode). The resistor value is calculated as R = (VSUPPLY − 1.22V) / IOP, where IOP is selected within 8µA–20mA per datasheet specifications.
Is ZXRE1004FRSTOA qualified for automotive applications?
No-ZXRE1004FRSTOA is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives (e.g., AP2112K) for such applications. For automotive use, contact Diodes' sales team to explore qualified equivalents with PPAP support and IATF 16949 manufacturing.
ZXRE1004FRSTOA 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)
ZXRE1004FRSTOA FAQ
1.How can I place an order for ZXRE1004FRSTOA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE1004FRSTOA 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 ZXRE1004FRSTOA reliable?
The price and inventory of ZXRE1004FRSTOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004FRSTOA is usually 5 days.
3.What payment methods are accepted for ZXRE1004FRSTOA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004FRSTOA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE1004FRSTOA?
ZXRE1004FRSTOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE1004FRSTOA 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 ZXRE1004FRSTOA?
For technical support, including ZXRE1004FRSTOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004FRSTOA requirements.
6.How does Aetrix verify that ZXRE1004FRSTOA is sourced from the original manufacturer or authorized distributors?
All ZXRE1004FRSTOA 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 ZXRE1004FRSTOA meets industry standards.
7.What is the process for return or replacement of ZXRE1004FRSTOA?
All ZXRE1004FRSTOA units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004FRSTOA, 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 ZXRE1004FRSTOA part is unused and in its original packaging.
Return procedure for ZXRE1004FRSTOA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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