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Texas Instruments LM4125AIM5-2.0/NOPB
- Part No.:
- LM4125AIM5-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4125AIM5-2.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,281
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Product details
Overview
LM4125AIM5-2.0/NOPB from Texas Instruments is a precision micropower low-dropout voltage reference IC delivering a stable 2.048 V output with ±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 LM4125AIM5-2.0/NOPB datasheet, LM4125AIM5-2.0/NOPB pinout, LM4125AIM5-2.0/NOPB application, or LM4125AIM5-2.0/NOPB equivalent, key selection criteria include guaranteed industrial temperature range (−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 LM4125AIM5-2.0/NOPB uses a bandgap-based architecture with internal trimming to achieve tight initial accuracy and low thermal drift. Its low dropout voltage enables operation with input as low as 2.0 V while maintaining regulation-critical for single-cell Li-ion or dual-cell alkaline systems.
It supports bidirectional current flow (±5 mA), allowing use as both a reference and a precision bias source. Power-down mode reduces quiescent current to under 2 µA, making it suitable for intermittent-sampling applications where standby power must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V ±0.2% (A-grade; enables 12-bit ADC full-scale alignment without calibration) |
| Tempco | 50 ppm/°C (ensures ≤0.1% output drift over −40°C to +85°C ambient) |
| Dropout Voltage | 120 mV typ @ 1 mA (allows regulation from 2.17 V input-ideal for low-voltage microcontroller rails) |
| Supply Current | 160 µA typ (supports >1-year battery life in 10 µA-average-power IoT sensor nodes) |
| Load Drive | ±5 mA (sinks/sources sufficient current to drive ADC reference inputs and op-amp bias networks) |
| Noise (0.1–10 Hz) | 20 µVPP (low enough for 16-bit SAR ADCs without external filtering) |
| Operating Temp | −40°C to +85°C (qualified for industrial-grade embedded control and test equipment) |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.45 mm body height, RoHS-compliant, tape-and-reel (1000 pcs/reel), moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unconnected; must remain floating-no external tie required |
| 2 (GND) | Ground Reference | Primary return path for load and supply currents; requires low-impedance PCB connection |
| 3 (EN) | Enable Input | Active-high logic control; pulls device into <2 µA shutdown when low |
| 4 (IN) | Positive Supply Input | Accepts 2.0 V to 6.0 V; includes parasitic diode to output (prevents backfeed) |
| 5 (OUT) | Precision Output | Delivers regulated 2.048 V; stable with 0.022 µF–0.1 µF ceramic capacitors |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 160 µA typical supply current enables multi-year battery life in always-on sensing nodes |
| Bidirectional Load Capability | ±5 mA sourcing/sinking supports active biasing of transducer interfaces and op-amp feedback networks |
| Low Thermal Hysteresis | 0.5 mV/V ensures repeatable voltage after thermal cycling-critical for metrology-grade calibration |
| Stable with Ceramic Capacitors | Validated for 0.022 µF minimum ceramic output cap-eliminates need for tantalum or electrolytic |
| Industrial Temperature Range | Full specification over −40°C to +85°C avoids derating in factory automation and outdoor equipment |
Applications
| Portable Data Loggers | Precision Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and pressure at 1-minute intervals. IC Role / Device Role / Timing Role: Provides stable 2.048 V reference for 12-bit SAR ADC and excitation for resistive bridge sensors. Use Value: Enables ±0.1% measurement accuracy across −20°C to +60°C operating range with no recalibration. | Use Scenario: Industrial pressure transmitter with 4–20 mA loop output and local digital display. IC Role / Device Role / Timing Role: Supplies precision reference for sigma-delta ADC and programmable gain amplifier offset nulling. Use Value: Maintains <0.05% full-scale error over 10-year field deployment due to low long-term drift (100 ppm/1000 hrs). |
| Handheld Test Meters | Medical Vital Sign Monitors |
Use Scenario: Pocket-sized multimeter measuring DC voltage, resistance, and continuity with autoranging. IC Role / Device Role / Timing Role: Serves as primary reference for dual-slope integrator and auto-zero circuitry. Use Value: Delivers 0.2% basic DCV accuracy with <10 µV noise floor-meeting IEC 61010 Class II safety requirements. | Use Scenario: Portable ECG device acquiring lead-I/II/III signals with real-time ST-segment analysis. IC Role / Device Role / Timing Role: References 16-bit delta-sigma ADC sampling at 1 kSPS and sets op-amp common-mode voltage. Use Value: Ensures <1 µV RMS noise contribution and <0.01% gain error-preserving diagnostic fidelity of QRS complex morphology. |
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 output, ±0.2% accuracy, but higher 50 µA supply current and no enable pin | Lacks power-down mode-unsuitable for duty-cycled battery systems | Select when ultra-low quiescent current is not required and board space allows larger SOT-23-3 footprint |
| ADR3420ARJZ-R7 | 2.048 V, ±0.1% initial accuracy, 30 ppm/°C tempco, but 180 µA supply current and no sink capability | Cannot sink current-limits use in active bias or current-source configurations | Choose for highest accuracy in fixed-supply industrial PLC modules where bidirectional drive is unnecessary |
Compared with REF3020AIDBZR and ADR3420ARJZ-R7, the LM4125AIM5-2.0/NOPB uniquely combines micropower operation (160 µA), true bidirectional ±5 mA drive, and integrated enable-making it the only option among the three that supports low-duty-cycle, high-precision sensor front-ends with active signal conditioning.
Availability
LM4125AIM5-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial process monitoring, and medical vital sign acquisition requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for LM4125AIM5-2.0/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 expertise in precision analog design.
The LM4125 series belongs to TI's precision voltage reference product line, engineered specifically for high-accuracy, low-power applications where stability, low dropout, and small footprint are critical-such as portable test equipment and battery-operated sensor nodes.
FAQ
What is the maximum input voltage rating for LM4125AIM5-2.0/NOPB?
The absolute maximum input voltage on the IN pin of LM4125AIM5-2.0/NOPB is 8 V. However, the recommended operating range is 2.0 V to 6.0 V per the datasheet. Exceeding 6 V may increase power dissipation beyond safe limits and degrade long-term stability. The device includes an internal parasitic diode between IN and OUT, so reverse voltage conditions must be avoided.
Does LM4125AIM5-2.0/NOPB require an external output capacitor, and if so, what value is recommended?
Yes, LM4125AIM5-2.0/NOPB requires a minimum 0.022 µF ceramic output capacitor for stability, as confirmed in the "Application Hints" section of the datasheet. Values up to 0.1 µF ceramic are fully supported; larger values (up to 1 µF) require tantalum construction and additional 50 pF compensation. Omitting the capacitor risks oscillation and degraded noise performance in LM4125AIM5-2.0/NOPB circuits.
Can LM4125AIM5-2.0/NOPB sink current, and how much is guaranteed?
Yes, LM4125AIM5-2.0/NOPB is specified to sink up to −5 mA while maintaining output voltage regulation within ±0.17%/mA load regulation. This bidirectional capability is explicitly documented in the "Features" and "Electrical Characteristics" tables, enabling its use in active bias networks, current-source topologies, and op-amp level-shifting circuits where sinking is required.
What is the thermal hysteresis specification for LM4125AIM5-2.0/NOPB, and how does it affect system calibration?
LM4125AIM5-2.0/NOPB has a thermal hysteresis of 0.5 mV/V, measured as the output voltage shift at +25°C before and after cycling between −40°C and +125°C. For the 2.048 V output, this translates to ~1 mV max hysteresis-equivalent to ~0.05% full-scale error. In high-accuracy calibration workflows, this effect must be accounted for during temperature soak-and-measure procedures.
Is LM4125AIM5-2.0/NOPB pin-compatible with other members of the LM4125 family, such as the 2.5 V or 4.096 V variants?
Yes, all LM4125 variants-including LM4125AIM5-2.0/NOPB, LM4125AIM5-2.5/NOPB, and LM4125AIM5-4.096/NOPB-share identical SOT-23-5 (DBV) packaging and pinout. The only differences are output voltage and corresponding device marking (R80A for 2.048 V). No PCB layout changes are needed when substituting between fixed-voltage options within the same grade (A or standard).
LM4125AIM5-2.0/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:
- ±0.2%
- 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
LM4125AIM5-2.0/NOPB FAQ
1.How can I place an order for LM4125AIM5-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4125AIM5-2.0/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 LM4125AIM5-2.0/NOPB reliable?
The price and inventory of LM4125AIM5-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4125AIM5-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4125AIM5-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4125AIM5-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4125AIM5-2.0/NOPB?
LM4125AIM5-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4125AIM5-2.0/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 LM4125AIM5-2.0/NOPB?
For technical support, including LM4125AIM5-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4125AIM5-2.0/NOPB requirements.
6.How does Aetrix verify that LM4125AIM5-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4125AIM5-2.0/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 LM4125AIM5-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4125AIM5-2.0/NOPB?
All LM4125AIM5-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4125AIM5-2.0/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 LM4125AIM5-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4125AIM5-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4125AIM5-2.0/NOPB Tags
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