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Texas Instruments LM4125AIM5-4.1/NOPB
- Part No.:
- LM4125AIM5-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4125AIM5-4.1/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,540
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Product details
Overview
LM4125AIM5-4.1/NOPB from Texas Instruments is a precision micropower low-dropout voltage reference IC delivering 4.096 V output with ±0.2% initial accuracy, 50 ppm/°C temperature coefficient, and 120 mV typical dropout at 1 mA - designed for high-accuracy analog signal chains in portable instrumentation and data acquisition systems.
For engineers reviewing the LM4125AIM5-4.1/NOPB datasheet, LM4125AIM5-4.1/NOPB pinout, LM4125AIM5-4.1/NOPB application, or LM4125AIM5-4.1/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 LM4125AIM5-4.1/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. It operates with input voltages as low as 2 V and up to 6 V, enabling use in single-supply 3.3 V or 5 V systems where headroom is constrained.
Its low 120 mV dropout at 1 mA load and bidirectional ±5 mA output drive support precision regulator topologies and active current sources. Power-down mode reduces quiescent current to under 2 µA, making it suitable for battery-backed or duty-cycled measurement circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal - matches 12-bit DAC full-scale reference and enables direct interface with 4.096 V ADC reference inputs without scaling. |
| Initial Accuracy | ±0.2% (Grade A) - eliminates need for system-level calibration in portable test equipment and medical sensors. |
| Temperature Coefficient | 50 ppm/°C - ensures ≤0.5 mV drift over −40°C to +85°C ambient, critical for unheated industrial sensor front-ends. |
| Dropout Voltage | 120 mV typ @ 1 mA - allows stable regulation from 4.2 V Li-ion batteries down to 3.0 V before cutoff. |
| Supply Current | 160 µA typ - supports >1-year battery life in 10 µA average-power IoT sensor nodes with periodic wake-up. |
| Output Noise | 36 µVPP (10 Hz–10 kHz) - preserves SNR in 16-bit+ data acquisition systems without external filtering. |
| Load Drive | ±5 mA source/sink - enables direct driving of op-amp inputs, SAR ADC references, and low-current bias networks. |
Pinout & Package
SOT-23-5 package (Package Drawing DBV), 2.9 mm × 1.6 mm × 1.45 mm height, RoHS-compliant, tape-and-reel (1000 pcs/reel), moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No Connect | Internally unused; must be left floating or tied to GND per layout best practice - no electrical function. |
| Pin 2 (GND) | Ground Reference | Primary return path for supply and load currents; requires low-impedance PCB connection to minimize ground bounce in precision circuits. |
| Pin 3 (EN) | Enable Input | Active-high logic control; drives device into <2 µA power-down state when low - enables software-controlled reference activation. |
| Pin 4 (VIN) | Positive Supply Input | Accepts 2 V to 6 V; internal parasitic diode conducts if VOUT exceeds VIN - avoid back-driving during power sequencing. |
| Pin 5 (VOUT) | Precision Reference Output | Stable 4.096 V source/sink node; requires ≥0.022 µF ceramic capacitor to ground for stability per TI application guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 160 µA typical supply current enables multi-year battery life in portable meters and handheld calibrators. |
| Low Dropout | 120 mV typical dropout at 1 mA allows operation from partially discharged 3.7 V Li-ion cells without regulation loss. |
| Bidirectional Output Drive | ±5 mA sink/source capability supports active biasing of transducer bridges and programmable current sources. |
| Power-Down Control | EN pin reduces current to <2 µA - essential for duty-cycled data loggers and energy-harvesting sensor nodes. |
| Stable with Small Ceramic Caps | Guaranteed stability with 0.022 µF–0.1 µF X7R ceramic output capacitors - eliminates need for tantalum or large footprints. |
Applications
| Portable Instrumentation | Industrial Data Acquisition |
|---|---|
|
Use Scenario: Handheld multimeter with 16-bit ADC and auto-ranging front-end. IC Role / Device Role / Timing Role: Primary voltage reference for ADC and DAC subsystems, providing stable 4.096 V full-scale calibration point. Use Value: ±0.2% initial accuracy and 50 ppm/°C tempco eliminate factory recalibration across operating temperature range. |
Use Scenario: DIN-rail mounted process transmitter measuring pressure/temperature with 4–20 mA loop output. IC Role / Device Role / Timing Role: Precision reference for sigma-delta ADC and current-loop DAC, ensuring traceable measurement accuracy. Use Value: 120 mV dropout enables direct regulation from 5 V isolated DC-DC converter, minimizing thermal drift in enclosed enclosures. |
| Battery-Powered Medical Sensors | Automotive Diagnostic Tools |
|
Use Scenario: Wearable ECG monitor with ultra-low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Low-noise reference for instrumentation amplifier gain-setting and ADC conversion. Use Value: 36 µVPP (10 Hz–10 kHz) output noise preserves signal integrity in sub-mV biopotential measurements. |
Use Scenario: OBD-II scan tool with CAN interface and analog sensor simulation outputs. IC Role / Device Role / Timing Role: Stable reference for programmable voltage sources simulating throttle position or coolant temperature signals. Use Value: ±5 mA bidirectional drive supports direct loading by automotive sensor simulator circuits without buffer amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3340AIDBVR | 4.096 V output, ±0.1% initial accuracy, 30 ppm/°C tempco, 180 µA supply current, SOT-23-5. | Lower tempco and higher accuracy but higher quiescent current - better for lab-grade instruments, less optimal for battery life. | Select REF3340AIDBVR when long-term stability and lower tempco outweigh micropower requirements. |
| MAX6029AEUR+T | 4.096 V output, ±0.2% initial accuracy, 75 ppm/°C tempco, 120 µA supply current, SOT-23-5. | Lower supply current but higher tempco - suitable for cost-sensitive consumer devices with limited temperature range. | Select MAX6029AEUR+T when sub-120 µA supply current is mandatory and ambient temperature stays within 0°C–70°C. |
Compared with LM4125AIM5-4.1/NOPB, REF3340AIDBVR offers tighter accuracy and lower drift but increases supply current by 12.5%, while MAX6029AEUR+T reduces current draw by 25% at the expense of 50% higher tempco - trade-offs require explicit validation against end-equipment thermal and battery-life targets.
Availability
LM4125AIM5-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and battery-powered medical sensors requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LM4125AIM5-4.1/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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and digital signal processing technologies since 1930.
The LM4125 series belongs to TI's precision voltage reference product line, engineered specifically for low-power, high-accuracy applications where micropower consumption, low dropout, and industrial temperature reliability are mandatory design constraints.
FAQ
What is the guaranteed temperature range for LM4125AIM5-4.1/NOPB initial accuracy?
The LM4125AIM5-4.1/NOPB Grade A device guarantees ±0.2% initial accuracy over the industrial temperature range of −40°C to +85°C. This specification is production-tested at 25°C and ensured across the full range using Statistical Quality Control methods per the official TI datasheet SNVS238A.
Does LM4125AIM5-4.1/NOPB support sinking current, and how much?
Yes, LM4125AIM5-4.1/NOPB supports bidirectional output drive: it can both source and sink up to ±5 mA. This capability is confirmed in the "Source and Sink Current Output" feature list and verified in Electrical Characteristics tables for both 4.096 V and other output variants in the TI datasheet.
What is the minimum output capacitor required for stable operation of LM4125AIM5-4.1/NOPB?
The LM4125AIM5-4.1/NOPB requires a minimum 0.022 µF ceramic capacitor on the VOUT pin to ground for guaranteed stability, as specified in TI's Application Hints section. Capacitor values up to 0.1 µF X7R ceramic are fully supported; larger values require tantalum construction and additional compensation.
Can LM4125AIM5-4.1/NOPB operate from a 3.3 V supply while delivering 4.096 V output?
No - LM4125AIM5-4.1/NOPB cannot regulate 4.096 V output from a 3.3 V input because its minimum input voltage must exceed the output voltage by at least the dropout voltage (120 mV typ). A minimum 4.216 V input is required for reliable 4.096 V regulation at 1 mA load.
Is LM4125AIM5-4.1/NOPB pin-compatible with other LM4125 variants like LM4125AIM5-2.5/NOPB?
Yes - all LM4125 variants including LM4125AIM5-4.1/NOPB, LM4125AIM5-2.5/NOPB, and LM4125IM5-2.0/NOPB share identical SOT-23-5 (DBV) packaging, pinout, and footprint. Only the output voltage and grade differ; no PCB redesign is needed when substituting within the same grade and package.
LM4125AIM5-4.1/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):
- 4.096V
- 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:
- 5V ~ 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
LM4125AIM5-4.1/NOPB FAQ
1.How can I place an order for LM4125AIM5-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4125AIM5-4.1/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 LM4125AIM5-4.1/NOPB reliable?
The price and inventory of LM4125AIM5-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4125AIM5-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4125AIM5-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4125AIM5-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4125AIM5-4.1/NOPB?
LM4125AIM5-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4125AIM5-4.1/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 LM4125AIM5-4.1/NOPB?
For technical support, including LM4125AIM5-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4125AIM5-4.1/NOPB requirements.
6.How does Aetrix verify that LM4125AIM5-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4125AIM5-4.1/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 LM4125AIM5-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4125AIM5-4.1/NOPB?
All LM4125AIM5-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4125AIM5-4.1/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 LM4125AIM5-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4125AIM5-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4125AIM5-4.1/NOPB Tags
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