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Texas Instruments LM4125IM5X-2.5/NOPB
- Part No.:
- LM4125IM5X-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4125IM5X-2.5/NOPB.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,443
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Product details
Overview
LM4125IM5X-2.5/NOPB from Texas Instruments is a precision micropower low-dropout voltage reference IC delivering a stable 2.5 V output with ±0.5% initial accuracy, 50 ppm/°C temperature coefficient, and 120 mV typical dropout at 1 mA load-designed for high-accuracy analog signal chains in portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the LM4125IM5X-2.5/NOPB datasheet, LM4125IM5X-2.5/NOPB pinout, LM4125IM5X-2.5/NOPB application, or LM4125IM5X-2.5/NOPB equivalent, key selection criteria include guaranteed industrial temperature operation (−40°C to +85°C), ±5 mA source/sink capability, 160 µA typical supply current, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The LM4125IM5X-2.5/NOPB implements a bandgap-based reference core with internal trimming for fixed 2.5 V output, operating from 2 V to 6 V input while maintaining regulation down to 120 mV headroom. Its architecture supports both sourcing and sinking up to ±5 mA, enabling bidirectional load handling in precision regulator and current-source configurations.
It features a dedicated enable-capable power-down mode drawing <2 µA, thermal hysteresis of ≤0.5 mV/V over −40°C to +125°C, and low-noise performance: 20 µVPP (0.1–10 Hz) and 46 µVPP (10 Hz–10 kHz) referenced to 2.5 V output-critical for high-resolution ADC/DAC biasing and sensor excitation circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal, ±0.5% initial accuracy ensures ≤12.5 mV absolute error at 25°C for calibration-critical systems. |
| Temperature Coefficient | 50 ppm/°C (−40°C to +125°C), limiting drift to ±0.3125 mV over full industrial range-suitable for unheated precision measurement. |
| Dropout Voltage | 120 mV typ @ 1 mA; enables operation from 2.62 V input-ideal for single-cell Li-ion or 3.3 V rail-supplied systems. |
| Supply Current | 160 µA typ; draws <2 µA in power-down mode-extends battery life in always-on monitoring nodes. |
| Load Drive | ±5 mA source/sink capability allows direct interface to op-amp inputs, ADC references, or low-power DACs without buffering. |
| Output Noise | 46 µVPP (10 Hz–10 kHz); supports 16-bit+ resolution in data acquisition without external filtering. |
| Operating Temperature | −40°C to +85°C industrial range with full parameter guarantees-validated for automotive cabin and factory-floor environments. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.45 mm body, RoHS-compliant, tape-and-reel (1000 pcs/reel), moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable Input | Active-high logic control; drives device into <2 µA shutdown when low-enables system-level power gating. |
| 2 (GND) | Ground Reference | Low-impedance return path for reference and load currents; requires solid ground plane connection to minimize noise coupling. |
| 3 (NC) | No Connect | Internally unused; must be left floating or tied to GND per layout best practice-no electrical function. |
| 4 (IN) | Positive Supply Input | Accepts 2 V to 6 V; includes parasitic diode to output-prevents reverse-current damage if VOUT > VIN. |
| 5 (OUT) | Reference Output | Stable 2.5 V source/sink node; requires ≥0.022 µF ceramic capacitor for stability-ESR <0.5 Ω mandatory. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 160 µA typical supply current enables multi-year battery life in wireless sensor nodes and portable meters. |
| Low Dropout Performance | 120 mV typical dropout at 1 mA allows use with weak or aging batteries down to 2.62 V input-no boost converter needed. |
| Bidirectional Load Support | ±5 mA source/sink capability eliminates need for external transistors in precision current-source or sink applications. |
| Power-Down Control | EN pin reduces quiescent current to <2 µA-essential for duty-cycled systems like IoT edge devices and handheld test gear. |
| Low-Frequency Noise Suppression | 20 µVPP (0.1–10 Hz) minimizes offset drift in high-gain instrumentation amplifiers and weigh-scale bridges. |
Applications
| Portable Data Loggers | Precision Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and gas concentration over months. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for 16-bit SAR ADC and low-noise instrumentation amplifier front-end. Use Value: Enables ±0.1% measurement accuracy across −20°C to +70°C ambient with no recalibration, leveraging 50 ppm/°C tempco and 46 µVPP broadband noise. |
Use Scenario: Industrial pressure transducer module with bridge sensor and analog front-end. IC Role / Device Role / Timing Role: Supplies excitation voltage and ADC reference in ratiometric configuration to cancel supply variation errors. Use Value: Delivers matched 2.5 V sourcing/sinking to bridge and ADC, eliminating gain error from supply ripple via inherent ratiometric rejection. |
| Handheld Multimeters | Medical Patient Monitoring |
|
Use Scenario: 4½-digit handheld DMM requiring stable reference for autoranging DCV/Ohms functions. IC Role / Device Role / Timing Role: Primary voltage reference for dual-slope integrator and auto-zero amplifier stages. Use Value: Guarantees ±0.5% initial accuracy and <0.3 mV total drift over operating range-meets IEC 61010 Class II safety margin requirements. |
Use Scenario: Portable ECG monitor measuring microvolt-level cardiac signals with 12-bit resolution. IC Role / Device Role / Timing Role: Low-noise 2.5 V bias for op-amp gain stages and ADC reference in analog signal chain. Use Value: 20 µVPP (0.1–10 Hz) noise floor prevents obscuring QRS complex morphology; 160 µA supply current extends clinical-grade runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | 2.5 V, ±0.2% initial accuracy, 50 ppm/°C, 50 µA supply current-higher accuracy but lower drive (±25 mA sink only). | Preferred where ultra-low quiescent current dominates over bidirectional drive; not suitable for active sink loads >25 mA. | Select REF3025AIDBZR when lowest possible supply current (<50 µA) is required and load is sink-only or buffered. |
| ADR3425ARJZ-R7 | 2.5 V, ±0.1% initial accuracy, 10 ppm/°C, 120 µA supply current-superior tempco and accuracy, but no enable pin or power-down mode. | Used in fixed-power systems where continuous operation is acceptable and sub-10 ppm/°C drift is mandatory (e.g., lab equipment). | Select ADR3425ARJZ-R7 when long-term stability and ultra-low tempco outweigh need for power gating or ±5 mA bidirectional drive. |
Compared with LM4125IM5X-2.5/NOPB, REF3025AIDBZR offers lower supply current but lacks source capability and EN control, while ADR3425ARJZ-R7 delivers tighter accuracy and tempco but removes power-down functionality-making LM4125IM5X-2.5/NOPB optimal for battery-operated, bidirectional-load systems needing balanced performance.
Availability
LM4125IM5X-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and industrial sensor interfaces requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4125IM5X-2.5/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies with decades of precision analog design heritage.
The LM4125 series belongs to TI's precision voltage reference product line, engineered specifically for high-accuracy, low-power, and low-dropout operation in portable and industrial measurement systems.
FAQ
What is the guaranteed initial accuracy of LM4125IM5X-2.5/NOPB over temperature?
The LM4125IM5X-2.5/NOPB has ±0.5% initial accuracy at 25°C, with full specifications ensured over −40°C to +85°C. This means the output remains within ±12.5 mV of 2.5 V across the industrial temperature range-verified by TI's Statistical Quality Control methods and production testing.
Does LM4125IM5X-2.5/NOPB support both sourcing and sinking current?
Yes, LM4125IM5X-2.5/NOPB provides true bidirectional current capability: it can source up to +5 mA and sink up to −5 mA from its OUT pin. This enables direct driving of op-amp inputs, ADC references, or current-source circuits without external transistors-confirmed in Electrical Characteristics tables for both load directions.
What is the minimum output capacitor required for stable operation of LM4125IM5X-2.5/NOPB?
The LM4125IM5X-2.5/NOPB requires a minimum 0.022 µF ceramic capacitor on the OUT pin for stability. Capacitors in the 0.022 µF to 0.1 µF range are recommended, with ESR limited to 0.1–0.5 Ω. Larger values (up to 1 µF) are allowed only with tantalum types and require an additional 50 pF capacitor between OUT and REF pins per TI Application Hints.
Can LM4125IM5X-2.5/NOPB operate from a 2.2 V supply?
Yes, LM4125IM5X-2.5/NOPB operates with input voltages as low as 2 V. At 2.2 V input and 1 mA load, the 120 mV typical dropout ensures regulated 2.5 V output-verified in the Dropout Voltage specification (120 mV typ @ 1 mA) and Absolute Maximum Ratings table confirming 2 V minimum VIN.
Is there a higher-accuracy grade of LM4125IM5X-2.5/NOPB available?
Yes-the LM4125AIM5X-2.5/NOPB variant offers ±0.2% initial accuracy instead of ±0.5%, while retaining identical 50 ppm/°C tempco, SOT-23-5 package, and all other electrical characteristics. Both share the same DBV package drawing and pinout, making them drop-in replacements where tighter initial tolerance is required.
LM4125IM5X-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 20µVp-p
- Noise - 10Hz to 10kHz:
- 36µVp-p
- Voltage - Input:
- 3.3V ~ 8V
- Current - Supply:
- 290µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM4125IM5X-2.5/NOPB FAQ
1.How can I place an order for LM4125IM5X-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4125IM5X-2.5/NOPB 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 LM4125IM5X-2.5/NOPB reliable?
The price and inventory of LM4125IM5X-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4125IM5X-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4125IM5X-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4125IM5X-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4125IM5X-2.5/NOPB?
LM4125IM5X-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4125IM5X-2.5/NOPB 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 LM4125IM5X-2.5/NOPB?
For technical support, including LM4125IM5X-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4125IM5X-2.5/NOPB requirements.
6.How does Aetrix verify that LM4125IM5X-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4125IM5X-2.5/NOPB 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 LM4125IM5X-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4125IM5X-2.5/NOPB?
All LM4125IM5X-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4125IM5X-2.5/NOPB, 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 LM4125IM5X-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4125IM5X-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4125IM5X-2.5/NOPB Tags
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