My Inquiry
My Account
Diodes Incorporated ZXRE125FFTC
- Part No.:
- ZXRE125FFTC
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXRE125FFTC.pdf
- Description:
- IC VREF SHUNT 3% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,067
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ZXRE125FFTC from Diodes Incorporated is a micropower bandgap voltage reference IC delivering a precise 1.220 V output with ±3% initial tolerance, 20 ppm/°C typical temperature coefficient, and stable operation from 4 µA to 20 mA supply current - used in battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the ZXRE125FFTC datasheet, ZXRE125FFTC pinout, ZXRE125FFTC application, or ZXRE125FFTC equivalent, key selection criteria include low knee current (4 µA), unconditionally stable performance with capacitive loads, SOT23-3 package compatibility, and tolerance-grade differentiation across C/D/E/F variants.
Technical Context
The ZXRE125FFTC implements a two-terminal bandgap reference architecture operating in reverse breakdown mode, requiring no external biasing components. Its design achieves precision via curvature-compensated bandgap core and laser-trimmed resistive elements.
It functions as a shunt reference: cathode connects to regulated voltage node, anode to ground; regulation occurs by sinking variable current to maintain constant voltage across load. Stability is ensured up to 10 nF capacitive load without oscillation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.220 V ±3% at 100 µA - defines system ADC reference or sensor bias point accuracy |
| Tempco | 20 ppm/°C typical - ensures ≤±1.7 mV drift over –40°C to +85°C operating range |
| Knee Current | 4 µA - minimum current enabling regulation; enables ultra-low-power wake-up circuits |
| Dynamic Impedance | 0.2 Ω typical at 1 mA - maintains voltage stability under fast load transients |
| Noise (10Hz–10kHz) | 60 µVrms - supports high-resolution (16+ bit) analog measurements |
| Capacitive Load Stability | Unconditional - eliminates need for series resistor or external compensation network |
Pinout & Package
SOT23-3 package: 3-pin surface-mount plastic case with gull-wing leads; body dimensions 2.9 mm × 1.3 mm × 1.0 mm (L × W × H); thermal resistance θJA = 220°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Reference ground terminal | Connected to system GND; forms return path for shunt current |
| Pin 2 (Cathode) | Output/reference voltage node | Provides regulated 1.220 V; connects to load or feedback divider |
| Pin 3 (NC / Float) | No-connect terminal | Internally unconnected; must be left floating or tied to Pin 1 per datasheet guidance |
Key Features
| Feature | Design Value |
|---|---|
| Shunt topology with no external bias | Eliminates need for current-setting resistor or op-amp buffer in simple applications |
| Green molding compound | Halogen-free (Br/Sb-free), compliant with RoHS Directive 2011/65/EU Annex II |
| Wide operating current range | Functional from 4 µA to 20 mA - supports both energy-harvesting and higher-precision modes |
| Pin-compatible replacement | Direct drop-in for ZRA124/ZRA125 series - enables legacy design refresh without PCB change |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter using coin-cell battery with 10-year shelf life requirement. IC Role / Device Role / Timing Role: Shunt voltage reference for 16-bit SAR ADC and analog front-end biasing. Use Value: 4 µA knee current extends battery life; 20 ppm/°C tempco ensures calibration stability across field temperature ranges. | Use Scenario: Portable environmental sensor node logging temperature/humidity with microcontroller ADC. IC Role / Device Role / Timing Role: Precision reference for ratiometric sensor excitation and ADC conversion. Use Value: Unconditional capacitive-load stability allows direct connection to ADC input capacitor without RC filter degradation. |
| Portable Communication Devices | Low-Power Sensor Signal Conditioning |
Use Scenario: Bluetooth LE headset requiring stable microphone bias and ADC reference under dynamic RF noise. IC Role / Device Role / Timing Role: Low-noise (60 µVrms) reference for audio codec and sensor interface. Use Value: Sub-100 µV noise floor preserves SNR in 24-bit audio paths; SOT23 footprint saves board space in compact earbud PCB. | Use Scenario: Wearable heart-rate monitor using photodiode array and transimpedance amplifier. IC Role / Device Role / Timing Role: Stable 1.22 V reference for TIA offset nulling and ADC full-scale setting. Use Value: ±3% tolerance and low tempco ensure consistent gain calibration across production units and ambient conditions. |
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), 0.5% initial tol, 100 ppm/°C max, 80 µA min cathode current | Requires external resistor divider; higher power consumption limits ultra-low-power use | Select when adjustable output or tighter initial tolerance is required, and >80 µA supply is available |
| LM4040CIM3-ADJ | Adjustable (1.235 V min), 0.5% tol, 100 ppm/°C max, 60 µA min cathode current | Higher knee current and wider tempco reduce suitability for sub-10 µA systems | Prefer for designs needing factory-programmable output or where LM4040 footprint compatibility is critical |
Compared with TLVH431ACDBVR and LM4040CIM3-ADJ, ZXRE125FFTC offers lowest operating current (4 µA), best tempco (20 ppm/°C typ), and fixed 1.220 V output - making it optimal for space-constrained, battery-critical applications where simplicity and ultra-low quiescent power dominate.
Availability
ZXRE125FFTC is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable data acquisition systems, and low-power sensor signal conditioning requiring stable component supply across long-lifecycle industrial and medical device programs.
Supply support for ZXRE125FFTC 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 and manufacturing operations across Asia and the Americas.
The ZXRE125 belongs to Diodes' precision voltage reference product line, engineered specifically for ultra-low-power, space-constrained applications demanding high initial accuracy and exceptional thermal stability in portable and battery-operated systems.
FAQ
What is the correct connection method for Pin 3 on ZXRE125FFTC?
Pin 3 is internally unconnected (NC) and must be left floating or tied directly to Pin 1 (anode) per the official DS32170 datasheet. Connecting Pin 3 to any other node - including cathode or external signals - violates the device's validated layout and may cause regulation instability or parametric shift.
Can ZXRE125FFTC replace ZRA125 in existing designs without modification?
Yes - ZXRE125FFTC is explicitly specified as pin-for-pin compatible with ZRA125 series devices in SOT23-3 package. Electrical characteristics including knee current, tempco, and output voltage match within published tolerances, enabling direct substitution in legacy designs without PCB or schematic changes.
Does ZXRE125FFTC require an external series resistor in shunt configuration?
No - ZXRE125FFTC operates as a true two-terminal shunt reference and does not require an external current-setting resistor. The application circuit uses only the device itself between regulated node and ground; current is determined solely by the load and source impedance per Ohm's Law.
Is ZXRE125FFTC suitable for automotive applications per AEC-Q200?
No - ZXRE125FFTC is rated for –40°C to +85°C operation and is not qualified to AEC-Q200. It lacks automotive-specific screening, qualification testing, and PPAP documentation. For automotive use, Diodes recommends the AEC-Q200-qualified AP2112K or AP7361C series instead.
ZXRE125FFTC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXRE125FFTC FAQ
1.How can I place an order for ZXRE125FFTC through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE125FFTC 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 ZXRE125FFTC reliable?
The price and inventory of ZXRE125FFTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE125FFTC is usually 5 days.
3.What payment methods are accepted for ZXRE125FFTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE125FFTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE125FFTC?
ZXRE125FFTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE125FFTC 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 ZXRE125FFTC?
For technical support, including ZXRE125FFTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE125FFTC requirements.
6.How does Aetrix verify that ZXRE125FFTC is sourced from the original manufacturer or authorized distributors?
All ZXRE125FFTC 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 ZXRE125FFTC meets industry standards.
7.What is the process for return or replacement of ZXRE125FFTC?
All ZXRE125FFTC units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE125FFTC, 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 ZXRE125FFTC part is unused and in its original packaging.
Return procedure for ZXRE125FFTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZXRE125FFTC 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…
