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Texas Instruments LM4125AIM5X-2.5/NOPB
- Part No.:
- LM4125AIM5X-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4125AIM5X-2.5/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,957
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Product details
Overview
LM4125AIM5X-2.5/NOPB from Texas Instruments is a precision micropower low-dropout voltage reference IC delivering 2.5 V ±0.2% 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 LM4125AIM5X-2.5/NOPB datasheet, LM4125AIM5X-2.5/NOPB pinout, LM4125AIM5X-2.5/NOPB application, or LM4125AIM5X-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 ceramic output capacitors down to 0.022 µF.
Technical Context
The LM4125AIM5X-2.5/NOPB uses a bandgap-based architecture with internal trimming to achieve 0.2% initial accuracy and 50 ppm/°C tempco over −40°C to +125°C. Its low 120 mV dropout enables operation with input voltages as low as 2.625 V while maintaining regulation at 2.5 V output.
It supports bidirectional load current (±5 mA), features power-down mode drawing <2 µA, and delivers 36 µVPP (10 Hz–10 kHz) output noise. The device is stable with 0.022–0.1 µF ceramic output capacitors and exhibits 0.04%/mA typical load regulation across its full operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±0.2% (A-grade initial accuracy at 25°C; ensures ADC/DAC reference stability) |
| Temperature Coefficient | 50 ppm/°C (ensured over −40°C to +125°C; limits drift to ≤125 µV over full industrial range) |
| Dropout Voltage | 120 mV typ @ 1 mA (enables operation from 2.625 V supply; critical for single-cell Li-ion or 3.3 V rail margin) |
| Supply Current | 160 µA typ (ultra-low quiescent draw extends battery life in always-on sensor nodes) |
| Load Current Range | ±5 mA (supports direct driving of op-amp inputs, SAR ADC references, or small logic loads without buffering) |
| Output Noise | 36 µVPP (10 Hz–10 kHz); 46 µVPP (10 Hz–10 kHz, scaled for 2.5 V) - meets 16-bit ADC reference noise budgets |
| Line Regulation | 0.008%/V (0.2 mV/V max over 3.3–6 V input; minimizes supply ripple coupling into reference path) |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.45 mm body, gull-wing leads, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Enable (EN) | Active-high digital control: pulls output to high-impedance state when low; enables <2 µA shutdown current |
| Pin 2 | Ground (GND) | Reference return path; must be low-impedance connection to minimize ground bounce in precision circuits |
| Pin 3 | No Connect (NC) | Internally unused; must remain unconnected per TI design guidance to avoid parametric shift |
| Pin 4 | Input (VIN) | Positive supply input; accepts 2 V to 6 V; includes parasitic diode to output (prevents backfeed if VOUT > VIN) |
| Pin 5 | Output (VOUT) | Stable 2.5 V reference; capable of sourcing or sinking up to ±5 mA; requires ≥0.022 µF ceramic capacitor for stability |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 160 µA typical supply current enables multi-year battery life in wireless sensor transmitters |
| Low Dropout Architecture | 120 mV typical dropout allows use with 2.625 V minimum input-ideal for single-cell Li-ion or coin-cell systems |
| Bidirectional Output Drive | ±5 mA sink/source capability eliminates need for external buffer in most 12–16 bit data converter applications |
| Power-Down Mode | <2 µA shutdown current reduces system standby power by >98% versus active operation |
| Ceramic Capacitor Stability | Stable with 0.022–0.1 µF X7R/X5R ceramics-reduces BOM cost and board area vs. tantalum alternatives |
Applications
| Portable Data Loggers | Precision Industrial Sensors |
|---|---|
|
Use Scenario: Battery-powered environmental monitoring node logging temperature, humidity, and pressure at 10-second intervals for 5+ years. IC Role / Device Role / Timing Role: Primary voltage reference for 16-bit SAR ADC and low-power microcontroller VREF input. Use Value: 0.2% initial accuracy and 50 ppm/°C tempco ensure <±0.5 LSB total error over −20°C to +70°C operating range without calibration. |
Use Scenario: 4–20 mA loop-powered field transmitter with HART communication and local analog sensing. IC Role / Device Role / Timing Role: Stable excitation reference for RTD/thermistor bridges and precision DAC output scaling. Use Value: ±5 mA drive capability directly powers bridge circuits; 36 µVPP noise avoids degradation of 16-bit measurement resolution. |
| Medical Patient Monitors | Automotive Body Control Modules |
|
Use Scenario: Portable ECG front-end with lead-off detection, analog filtering, and 12-bit ADC digitization. IC Role / Device Role / Timing Role: Low-noise reference for instrumentation amplifier gain-setting and ADC conversion. Use Value: 120 mV dropout enables operation from 3.0 V supply derived from buck-boost regulator, preserving headroom for analog signal swing. |
Use Scenario: In-vehicle cabin temperature/humidity sensor with LIN bus interface and EEPROM calibration storage. IC Role / Device Role / Timing Role: Calibration reference for on-chip ADC measuring thermistor voltage divider outputs. Use Value: Guaranteed −40°C to +85°C operation ensures accuracy across automotive ambient extremes; 160 µA supply current minimizes load on 5 V LDO. |
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, but higher 50 µA supply current and no enable pin | Lacks power-down mode; unsuitable for ultra-low-power wake-on-event architectures | Select REF3025AIDBZR only if board space permits larger SOT-23-3 and continuous operation is acceptable |
| ADR3425ARJZ-R7 | 2.5 V, 0.1% initial accuracy, 10 ppm/°C, 125 µA supply current, but requires ≥1 µF output capacitor | Superior tempco but incompatible with minimal 0.022 µF ceramic stability requirement | Choose ADR3425ARJZ-R7 only when long-term stability and ultra-low drift outweigh layout constraints and capacitor cost |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the LM4125AIM5X-2.5/NOPB uniquely balances ultra-low quiescent current (160 µA), integrated enable functionality (<2 µA shutdown), and minimal 0.022 µF ceramic stability-making it optimal for space-constrained, battery-critical designs where both precision and power efficiency are non-negotiable.
Availability
LM4125AIM5X-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor nodes, and medical data acquisition systems requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for LM4125AIM5X-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 leadership in precision analog ICs and reference design expertise.
The LM4125 series belongs to TI's precision voltage reference product line, engineered specifically for high-accuracy, low-power applications in portable, industrial, and medical equipment where stability, size, and energy efficiency are critical.
FAQ
What is the guaranteed initial accuracy of LM4125AIM5X-2.5/NOPB over temperature?
The LM4125AIM5X-2.5/NOPB is an A-grade device with ±0.2% initial output voltage accuracy at 25°C. This specification is ensured over the industrial temperature range (−40°C to +85°C) via statistical correlation methods, and the temperature coefficient is guaranteed at 50 ppm/°C from −40°C to +125°C. The LM4125AIM5X-2.5/NOPB datasheet confirms these values in the Electrical Characteristics table under "Output Voltage Initial Accuracy" and "Temperature Coefficient".
Does LM4125AIM5X-2.5/NOPB support true bidirectional current sourcing and sinking?
Yes, the LM4125AIM5X-2.5/NOPB is explicitly rated for ±5 mA output current-capable of sourcing up to +5 mA into a light load or sinking up to −5 mA from a pull-up network. This bidirectional capability is verified in the "Source and Sink Current Output" feature list and confirmed in the Load Regulation specifications, where performance is characterized across −5 mA to +5 mA. The LM4125AIM5X-2.5/NOPB thus eliminates need for external buffers in many precision analog interfaces.
What is the minimum output capacitor required for stable operation of LM4125AIM5X-2.5/NOPB?
The LM4125AIM5X-2.5/NOPB requires a minimum 0.022 µF ceramic output capacitor (X7R or X5R dielectric) for guaranteed stability, as stated in the APPLICATION HINTS section. Values up to 0.1 µF ceramic are fully supported; larger values (up to 1 µF) require tantalum construction and additional 50 pF compensation. Using less than 0.022 µF risks oscillation or degraded transient response. This requirement applies directly to the LM4125AIM5X-2.5/NOPB and is independent of input capacitance.
Can LM4125AIM5X-2.5/NOPB operate from a 2.0 V supply?
No-the absolute minimum input voltage for the LM4125AIM5X-2.5/NOPB is 2.0 V, but functional regulation at 2.5 V output requires sufficient headroom. With 120 mV typical dropout, the minimum recommended input is 2.625 V (2.5 V + 125 mV) to ensure 1% regulation accuracy across temperature and load. At 2.0 V input, the device enters dropout and cannot maintain 2.5 V output. This limitation is defined in the Dropout Voltage specification and Operating Range tables for the LM4125AIM5X-2.5/NOPB.
Is LM4125AIM5X-2.5/NOPB compatible with lead-free reflow processes?
Yes, the LM4125AIM5X-2.5/NOPB is RoHS-compliant and qualified for lead-free soldering per JEDEC J-STD-020. Its MSL Level-1 rating confirms unlimited floor life at ≤30°C/60% RH, and peak reflow temperature is rated at 260°C. The package drawing DBV and lead finish (Sn) are explicitly listed in TI's PACKAGE OPTION ADDENDUM, confirming full compatibility with standard Pb-free reflow profiles used in commercial and industrial PCB assembly for the LM4125AIM5X-2.5/NOPB.
LM4125AIM5X-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:
- ±0.2%
- 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
LM4125AIM5X-2.5/NOPB FAQ
1.How can I place an order for LM4125AIM5X-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4125AIM5X-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 LM4125AIM5X-2.5/NOPB reliable?
The price and inventory of LM4125AIM5X-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 LM4125AIM5X-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4125AIM5X-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4125AIM5X-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4125AIM5X-2.5/NOPB?
LM4125AIM5X-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4125AIM5X-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 LM4125AIM5X-2.5/NOPB?
For technical support, including LM4125AIM5X-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4125AIM5X-2.5/NOPB requirements.
6.How does Aetrix verify that LM4125AIM5X-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4125AIM5X-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 LM4125AIM5X-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4125AIM5X-2.5/NOPB?
All LM4125AIM5X-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4125AIM5X-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 LM4125AIM5X-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4125AIM5X-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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