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Texas Instruments LM4125IM5-2.0/NOPB
- Part No.:
- LM4125IM5-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4125IM5-2.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:539
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Product details
Overview
LM4125IM5-2.0/NOPB from Texas Instruments is a precision micropower low-dropout voltage reference IC delivering a stable 2.048 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 LM4125IM5-2.0/NOPB datasheet, LM4125IM5-2.0/NOPB pinout, LM4125IM5-2.0/NOPB application, or LM4125IM5-2.0/NOPB equivalent, key selection considerations include its SOT-23-5 package, ±5 mA source/sink capability, 160 µA typical supply current, and guaranteed performance across −40°C to +85°C industrial temperature range.
Technical Context
The LM4125IM5-2.0/NOPB implements a bandgap-based reference core with internal trimming for fixed 2.048 V output, supporting both sourcing and sinking up to ±5 mA without external components. Its low 120 mV dropout enables operation from as low as 2.0 V input while maintaining regulation.
It features active power-down mode drawing <2 µA, thermal hysteresis of 0.5 mV/V over −40°C to +125°C, and output noise of 20 µVPP (0.1–10 Hz) and 36 µVPP (10 Hz–10 kHz), making it suitable for 12-bit to 14-bit ADC/DAC biasing where stability and low noise are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables precise 12-bit ADC full-scale alignment (e.g., 2.048 V = 4096 × 0.5 mV LSB). |
| Initial Accuracy | ±0.5% (standard grade); ensures ≤10.24 mV absolute error at 25°C before calibration. |
| Tempco | 50 ppm/°C max (−40°C to +125°C); contributes ≤10.24 mV drift over full industrial range. |
| Dropout Voltage | 120 mV typ @ 1 mA; allows regulation from 2.17 V input-critical for single-cell Li-ion or 2.5 V rail operation. |
| Supply Current | 160 µA typ; supports >1-year battery life in 10 µA average-power IoT sensor nodes. |
| Output Drive | ±5 mA source/sink; directly drives ADC reference inputs, op-amp feedback networks, or DAC bias circuits. |
| Operating Temp | −40°C to +85°C; qualified for industrial-grade embedded control and field instrumentation. |
Pinout & Package
SOT-23-5 (Package Drawing DBV), 2.9 mm × 1.6 mm × 1.45 mm profile, RoHS-compliant, tape-and-reel (1000 pcs/reel), moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Enable (EN) | Active-high digital control: pulls output to high-impedance and reduces supply current to <2 µA when low. |
| Pin 2 | Ground (GND) | Reference return path; connects to system ground plane to minimize noise coupling into output. |
| Pin 3 | No Connect (NC) | Internally unused; must be left floating or tied to GND per layout guidelines to avoid parasitic coupling. |
| Pin 4 | Input (VIN) | Positive supply input; accepts 2.0 V to 6.0 V; requires ≥0.022 µF ceramic bypass capacitor for stability. |
| Pin 5 | Output (VOUT) | Stable 2.048 V reference; drives capacitive loads up to 1 µF (tantalum) or resistive loads down to 400 Ω. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 160 µA typical supply current enables multi-year operation from coin-cell batteries in portable meters. |
| Low Dropout | 120 mV typical dropout at 1 mA allows use with ultra-low-voltage rails (e.g., 2.2 V LDO outputs). |
| Power-Down Mode | EN pin reduces quiescent current to <2 µA-ideal for duty-cycled sensor front-ends and sleep-state power savings. |
| Source/Sink Capability | ±5 mA output drive eliminates need for external buffer op-amps in precision DAC/ADC reference paths. |
| Low Noise Performance | 20 µVPP (0.1–10 Hz) and 36 µVPP (10 Hz–10 kHz) supports high-resolution 16-bit SAR and delta-sigma converters. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
|
Use Scenario: Battery-powered environmental monitoring node logging temperature, humidity, and pressure at 1-second intervals using a 14-bit ADC. IC Role / Device Role / Timing Role: Provides stable 2.048 V reference for ADC conversion, ensuring consistent LSB size and eliminating gain drift over temperature. Use Value: Enables ±0.5°C temperature measurement accuracy over −20°C to +70°C ambient without factory recalibration. |
Use Scenario: 4–20 mA loop-powered pressure transmitter operating in hazardous industrial zones with wide ambient swings. IC Role / Device Role / Timing Role: Supplies excitation and reference for bridge sensor conditioning circuitry and 16-bit DAC output stage. Use Value: Maintains 0.1% full-scale accuracy over −40°C to +85°C, meeting IEC 61000-6-2 immunity and SIL-2 functional safety margins. |
| Medical Patient Monitors | Automotive Battery Management |
|
Use Scenario: Portable ECG device acquiring biopotential signals with 12-bit resolution and real-time display on low-power OLED. IC Role / Device Role / Timing Role: Reference for analog front-end PGA and ADC; also biases op-amp DC levels in signal path. Use Value: Delivers <30 µV total output drift over clinical operating range (10°C–40°C), preserving diagnostic waveform fidelity. |
Use Scenario: Cell voltage monitoring IC in 12S Li-ion BMS requiring accurate 2.048 V reference for 12-bit cell ADCs. IC Role / Device Role / Timing Role: Precision reference for multiplexed cell voltage measurements and coulomb counting integration. Use Value: Ensures ≤5 mV cell voltage error across automotive temperature range (−40°C to +105°C PCB temp), enabling safe SOC estimation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBZR | 2.048 V, ±0.2% initial accuracy, 50 ppm/°C, 160 µA IQ, SOT-23-3 (no EN pin) | Lacks enable pin and sink capability; only sources current; no power-down mode | Select when board space is constrained and power-down is unnecessary; verify layout accommodates 3-pin footprint. |
| ADR3420ARJZ-R7 | 2.048 V, ±0.1% initial accuracy, 30 ppm/°C, 120 µA IQ, SOT-23-5 (with EN) | Lower tempco and higher accuracy but higher cost; not qualified for extended temp range beyond +85°C | Choose for metrology-grade instruments needing tighter long-term stability; confirm supply chain availability for ADR3420. |
Compared with LM4125IM5-2.0/NOPB, REF3020AIDBZR saves board area but sacrifices programmable shutdown and bidirectional drive, while ADR3420ARJZ-R7 improves accuracy and drift at the expense of cost and extended-temperature validation-making LM4125IM5-2.0/NOPB the optimal balance for industrial battery-powered designs requiring robustness, flexibility, and cost efficiency.
Availability
LM4125IM5-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical patient monitors requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for LM4125IM5-2.0/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 leadership in precision analog ICs and power management solutions.
The LM4125 series belongs to TI's precision voltage reference product line, engineered specifically for low-power, high-accuracy applications in portable, industrial, and medical systems where stability, small size, and micropower operation are essential.
FAQ
What is the output voltage tolerance of LM4125IM5-2.0/NOPB over temperature?
The LM4125IM5-2.0/NOPB has a guaranteed initial accuracy of ±0.5% at 25°C and a temperature coefficient of 50 ppm/°C over −40°C to +125°C. Over the industrial range (−40°C to +85°C), total output variation-including initial error and thermal drift-is typically within ±0.75% (±15.36 mV) relative to 2.048 V, verified by TI's SQC testing methodology.
Does LM4125IM5-2.0/NOPB support sinking current, and how much?
Yes, LM4125IM5-2.0/NOPB supports bidirectional output current: it can source or sink up to ±5 mA. This capability allows direct interfacing with op-amp inputs, DAC reference pins, or current-sinking LED indicators without external buffers-verified in Electrical Characteristics tables for both sourcing and sinking conditions.
What is the minimum output capacitor required for stable operation of LM4125IM5-2.0/NOPB?
The LM4125IM5-2.0/NOPB requires a minimum 0.022 µF ceramic output capacitor for stability, as specified in the APPLICATION HINTS section. Capacitance values up to 0.047 µF may use ceramic; larger values (up to 1 µF) require tantalum with an additional 50 pF capacitor between VOUT and REF pins per TI's Figure 19 guidance.
Can LM4125IM5-2.0/NOPB operate from a 2.0 V supply?
Yes-LM4125IM5-2.0/NOPB operates with input voltages as low as 2.0 V, enabled by its 120 mV typical dropout voltage at 1 mA. At 2.0 V input and 1 mA load, the output remains regulated at 2.048 V minus dropout (≤1.88 V min), satisfying the 2.0 V lower limit specified in Operating Range and Absolute Maximum Ratings.
Is LM4125IM5-2.0/NOPB pin-compatible with other members of the LM4125 family?
Yes-LM4125IM5-2.0/NOPB shares identical SOT-23-5 (DBV) package, pinout, and footprint with LM4125IM5-2.5/NOPB and LM4125AIM5-2.5/NOPB. All variants use Pin 1 (EN), Pin 2 (GND), Pin 3 (NC), Pin 4 (VIN), and Pin 5 (VOUT), enabling drop-in replacement across voltage options and grade variants without PCB changes.
LM4125IM5-2.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- 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
LM4125IM5-2.0/NOPB FAQ
1.How can I place an order for LM4125IM5-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4125IM5-2.0/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 LM4125IM5-2.0/NOPB reliable?
The price and inventory of LM4125IM5-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4125IM5-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4125IM5-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4125IM5-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4125IM5-2.0/NOPB?
LM4125IM5-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4125IM5-2.0/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 LM4125IM5-2.0/NOPB?
For technical support, including LM4125IM5-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4125IM5-2.0/NOPB requirements.
6.How does Aetrix verify that LM4125IM5-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4125IM5-2.0/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 LM4125IM5-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4125IM5-2.0/NOPB?
All LM4125IM5-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4125IM5-2.0/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 LM4125IM5-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4125IM5-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4125IM5-2.0/NOPB Tags
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