My Inquiry
My Account
Diodes Incorporated ZXRE125ERSTZ
,TO-226_straightlead.jpg)
- Part No.:
- ZXRE125ERSTZ
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- E-Line-3
- Datasheet:
-
ZXRE125ERSTZ.pdf
- Description:
- IC VREF SHUNT 2% E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:3,571
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ZXRE125ERSTZ from Diodes Incorporated is a micropower bandgap voltage reference IC delivering a precise 1.220 V output with ±2% initial tolerance, 20 ppm/°C typical temperature coefficient, and stable operation from 4 µA to 20 mA supply current - used in precision analog signal chains of portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the ZXRE125ERSTZ datasheet, ZXRE125ERSTZ pinout, ZXRE125ERSTZ application, or ZXRE125ERSTZ equivalent, key selection criteria include low knee current (4 µA), unconditionally stable performance with capacitive loads, SOT23-3 package compatibility, and tolerance-grade traceability (E-grade = ±2%).
Technical Context
The ZXRE125ERSTZ implements a two-terminal bandgap reference topology operating in reverse-biased Zener mode, optimized for ultra-low quiescent current and minimal thermal drift. Its design achieves 20 ppm/°C typical TC over –40°C to +85°C without external trimming.
It maintains regulation across a 4 µA to 20 mA operating current range and exhibits only 1 mV ΔVR variation from 30 µA to 1 mA load change, with dynamic impedance as low as 0.2 Ω at 1 mA - enabling direct use in high-precision ADC reference and sensor biasing circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.220 V ±2% (E-grade); enables accurate 12-bit+ ADC reference without calibration |
| Temp Coefficient | 20 ppm/°C typical; ensures ≤2.5 mV drift over full –40°C to +85°C range |
| Knee Current | 4 µA; allows operation in ultra-low-power sleep modes of portable devices |
| Operating Current | 4 µA to 20 mA; supports wide dynamic range without external current limiting |
| Dynamic Impedance | 0.2 Ω @ 1 mA; minimizes noise coupling and load-induced reference error |
| Wideband Noise | 60 µV(rms), 10 Hz–10 kHz; suitable for high-resolution measurement front-ends |
| Capacitive Load Stability | Unconditionally stable; eliminates need for output isolation resistors or compensation networks |
Pinout & Package
SOT23-3 surface-mount package (3.04 mm × 2.64 mm × 1.12 mm), lead-free and RoHS-compliant, with green molding compound (no Br/Sb).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode (cathode-connected via internal bond wire) | Internally tied to Pin 2; must be left floating or externally shorted to Pin 2 per datasheet top-view diagram |
| Pin 2 | Cathode / Output | Provides regulated 1.220 V reference voltage; connects to load or ADC REF+ input |
| Pin 3 | Anode (floating or tied to Pin 1) | Redundant anode terminal; unused in standard configuration; may be left open or connected to Pin 1 |
Key Features
| Feature | Design Value |
|---|---|
| Low knee current | 4 µA enables wake-from-sleep reference activation in energy-harvesting sensors |
| Unconditional stability | No external capacitor required - simplifies PCB layout and reduces BOM count |
| High tolerance grade availability | E-grade (±2%) provides cost-effective precision for industrial portable instruments |
| Green packaging | Halogen-free, RoHS-compliant SOT23 meets IPC-1752A environmental compliance requirements |
| Pin-compatible replacement | Direct drop-in for ZRA124/ZRA125 series - preserves legacy board designs |
Applications
| Battery-Powered Multimeters | Precision Portable DMMs |
|---|---|
Use Scenario: Handheld digital multimeters requiring stable reference during battery discharge from 3.6 V to 2.8 V. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing 1.220 V基准 for 16-bit sigma-delta ADC. Use Value: 4 µA knee current extends battery life >200 hours; ±2% tolerance ensures <0.1% absolute measurement error. | Use Scenario: Field-deployable calibration tools operating on single Li-ion cell with variable load transients. IC Role / Device Role / Timing Role: Low-noise (60 µVrms) reference source for ratiometric sensor excitation and measurement. Use Value: Unconditional stability prevents reference droop during LCD backlight switching events. |
| Wireless Sensor Node ADC Reference | Industrial Data Logger Biasing |
Use Scenario: Sub-100 µA wireless nodes sampling thermistor/RTD bridges every 10 seconds. IC Role / Device Role / Timing Role: Micropower reference enabling ultra-low-quiescent LDO + ADC subsystem. Use Value: 20 ppm/°C TC limits bridge measurement drift to <0.05 °C over ambient range. | Use Scenario: DIN-rail mounted loggers acquiring 4–20 mA loop signals with 12-bit resolution. IC Role / Device Role / Timing Role: Stable 1.220 V reference for current-to-voltage conversion and ADC reference. Use Value: 0.2 Ω dynamic impedance prevents gain error shift under varying channel scan rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | Adjustable (2.5 V min), 3-pin, 100 ppm/°C TC, 80 µA IQ | Requires external resistor network; higher drift limits precision in wide-temp environments | Select when adjustable output or higher current drive (>100 mA) is needed |
| REF191ESA+ | 1.25 V, 3-pin series reference, 15 ppm/°C TC, 100 µA IQ, 100 mV dropout | Series architecture requires minimum input headroom; incompatible with shunt-based layouts | Select for lowest TC where input voltage ≥2.5 V and board space permits SOIC-8 |
Compared with TLVH431ACDBVR and REF191ESA+, the ZXRE125ERSTZ offers superior micropower operation (4 µA knee), tighter fixed 1.220 V output, and true SOT23-3 shunt simplicity - making it optimal for space-constrained, battery-limited precision analog stages.
Availability
ZXRE125ERSTZ is available at Aetrix Electronics and suitable for battery-powered equipment, precision power supplies, and portable instrumentation requiring stable component supply with guaranteed long-term sourcing.
Supply support for ZXRE125ERSTZ 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, cost-optimized components for industrial, computing, and consumer markets.
The ZXRE125 belongs to Diodes' precision voltage reference product line, engineered specifically for micropower, low-drift, and space-constrained analog signal conditioning in portable and battery-operated systems.
FAQ
What is the maximum capacitive load the ZXRE125ERSTZ can drive without oscillation?
The ZXRE125ERSTZ is unconditionally stable and does not require external compensation - it operates reliably with any capacitive load, including large bulk decoupling caps (≥10 µF) directly at its cathode output. This eliminates risk of instability seen in many other shunt references.
Can ZXRE125ERSTZ replace ZRA125 in existing PCB layouts?
Yes - ZXRE125ERSTZ is pin-for-pin and footprint-compatible with ZRA125 series devices in SOT23-3 packages. The electrical characteristics (1.220 V, ±2%, 20 ppm/°C) match ZRA125E specifications, and no layout changes are required for drop-in replacement.
What is the minimum supply voltage needed to maintain regulation?
Regulation begins at the knee current of 4 µA, requiring a minimum supply voltage of approximately 1.25 V (reference voltage + forward drop of series resistor). With a 10 kΩ series resistor, regulation starts at ~1.26 V; actual threshold depends on external resistor value and load current.
Is ZXRE125ERSTZ suitable for automotive applications?
No - ZXRE125ERSTZ is rated for –40°C to +85°C operation and is not AEC-Q200 qualified. It lacks automotive-grade screening, extended temperature validation, and PPAP documentation; Diodes recommends AP2112K or AS78Lxx series for automotive-qualified references.
ZXRE125ERSTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- E-Line-3
- Series:
- -
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.22V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±2%
- 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)
ZXRE125ERSTZ FAQ
1.How can I place an order for ZXRE125ERSTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE125ERSTZ 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 ZXRE125ERSTZ reliable?
The price and inventory of ZXRE125ERSTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE125ERSTZ is usually 5 days.
3.What payment methods are accepted for ZXRE125ERSTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE125ERSTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE125ERSTZ?
ZXRE125ERSTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE125ERSTZ 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 ZXRE125ERSTZ?
For technical support, including ZXRE125ERSTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE125ERSTZ requirements.
6.How does Aetrix verify that ZXRE125ERSTZ is sourced from the original manufacturer or authorized distributors?
All ZXRE125ERSTZ 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 ZXRE125ERSTZ meets industry standards.
7.What is the process for return or replacement of ZXRE125ERSTZ?
All ZXRE125ERSTZ units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE125ERSTZ, 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 ZXRE125ERSTZ part is unused and in its original packaging.
Return procedure for ZXRE125ERSTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZXRE125ERSTZ Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
