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Texas Instruments LM4120AIM5-2.5/NOPB
- Part No.:
- LM4120AIM5-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4120AIM5-2.5/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,531
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Product details
Overview
LM4120AIM5-2.5/NOPB from Texas Instruments is a precision micropower low-dropout bandgap voltage reference delivering 2.5 V ±0.2% initial accuracy, 50 ppm/°C temperature coefficient, and 120 mV typical dropout at 1 mA load. It features enable control, ±5 mA source/sink capability, and 160 μA typical supply current-designed for high-accuracy analog signal chains in portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the LM4120AIM5-2.5/NOPB datasheet, LM4120AIM5-2.5/NOPB pinout, LM4120AIM5-2.5/NOPB application, or LM4120AIM5-2.5/NOPB equivalent, this page delivers verified specifications, SOT-23-5 pin mapping, real-world use cases, and validated alternative options aligned with TI's official SNVS049F revision F documentation.
Technical Context
The LM4120AIM5-2.5/NOPB implements a bandgap-based reference core with internal error amplifier and pass transistor, enabling stable 2.5 V output across input voltages from 2.7 V to 12 V. Its enable pin provides analog-controlled power-down mode, reducing supply current to <2 μA while maintaining fast wake-up response.
Designed for minimal thermal drift and mechanical stress sensitivity, it ensures 50 ppm/°C tempco over −40°C to 125°C and includes a dedicated REF pin (unconnected) to isolate noise-sensitive internal nodes. Output stability is guaranteed with 0.022–0.047 µF ceramic capacitors, supporting low-noise operation (46 µVPP, 0.1–10 Hz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±0.2% initial accuracy - enables direct interface with 12-bit ADCs without trimming. |
| Temperature Coefficient | 50 ppm/°C (−40°C to 125°C) - ensures ≤1.25 mV total drift over full industrial range. |
| Dropout Voltage | 120 mV typical at 1 mA - supports operation from 2.7 V supply while maintaining regulation. |
| Supply Current | 160 μA typical - extends battery life in always-on sensor nodes and portable meters. |
| Enable Function | Analog input with 0.4 V logic-low threshold - allows direct connection to microcontroller GPIO for controlled shutdown. |
| Output Noise | 46 µVPP (0.1–10 Hz) - meets requirements for precision weigh scales and medical front-ends. |
| Load Drive | ±5 mA source/sink - drives op-amp bias networks and DAC reference inputs without external buffers. |
Pinout & Package
SOT-23-5 (DBV) package, 1.60 mm × 2.90 mm body size, RoHS-compliant, tape-and-reel packaging (1000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF | Internal reference node | Must remain unconnected; sensitive to noise and capacitive loading-requires PCB isolation. |
| 2 - GND | Ground reference | Primary return path for load and supply currents; connects to system ground plane. |
| 3 - EN | Enable control input | Analog input; >2.4 V enables output, <0.4 V disables output; draws ≤15 µA in active state. |
| 4 - VIN | Positive supply input | Accepts 2.7–12 V; requires local 0.1 µF ceramic bypass capacitor for PSRR optimization. |
| 5 - VOUT | Regulated reference output | 2.5 V ±0.2% output; stable with 0.022–0.047 µF ceramic capacitor; drives up to ±5 mA. |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Operation | 120 mV typical at 1 mA enables use with single-cell Li-ion (3.0 V min) or two-cell alkaline supplies. |
| Power-Down Mode | Supply current drops to <2 μA when EN ≤ 0.4 V-critical for ultra-low-power sleep states in IoT sensors. |
| High Initial Accuracy | ±0.2% (A-grade) eliminates need for post-assembly calibration in factory test fixtures and portable DMMs. |
| Wide Input Range | Operates from 2.7 V to 12 V-supports shared rail designs across mixed-voltage systems (e.g., 3.3 V logic + 5 V analog). |
| Thermal Hysteresis | 0.5 mV/V max over −40°C to 125°C-ensures repeatable voltage after thermal cycling in automotive ECUs. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitoring node logging temperature, humidity, and pressure at 10-second intervals. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for 16-bit SAR ADC and precision op-amp signal conditioning. Use Value: 50 ppm/°C tempco and 46 µVPP noise ensure <±0.01% measurement accuracy across −25°C to 60°C field deployment. |
Use Scenario: 4–20 mA loop-powered transmitter for pressure sensing in oil & gas pipeline monitoring. IC Role / Device Role / Timing Role: Supplies excitation and reference voltage for bridge sensor interface and DAC feedback path. Use Value: ±5 mA drive capability and 120 mV dropout allow direct integration into low-headroom 24 V loop designs without LDO overhead. |
| Medical Patient Monitors | Automotive Battery Management Systems |
Use Scenario: Portable ECG device requiring sub-microvolt baseline stability during multi-hour patient recordings. IC Role / Device Role / Timing Role: Low-noise 2.5 V reference for instrumentation amplifier gain-setting and ADC conversion reference. Use Value: 0.1–10 Hz noise of 46 µVPP directly limits achievable SNR-enabling ≥90 dB dynamic range in analog front-end. |
Use Scenario: Cell voltage monitoring IC in 12S lithium-ion BMS operating across −40°C to 85°C under hood conditions. IC Role / Device Role / Timing Role: Precision reference for 12-bit ADC measuring individual cell voltages with ±1 mV absolute accuracy. Use Value: Guaranteed 50 ppm/°C tempco over extended range ensures consistent 0.5% full-scale error across entire automotive temperature envelope. |
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%, 50 ppm/°C, 50 μA supply current, no enable pin, SOT-23-3 | Lacks enable function and sink capability; lower quiescent current but no power-down mode | Preferred where board space is constrained and shutdown is not required-uses 3-pin footprint. |
| ADR3425ARJZ-R7 | 2.5 V, ±0.1%, 10 ppm/°C, 120 μA supply current, no enable, SOT-23-5 | Higher accuracy and lower tempco, but no enable and only source-only (no sink) output | Selected for metrology-grade instruments needing tighter drift; requires external buffer for sink loads. |
Compared with LM4120AIM5-2.5/NOPB, REF3025AIDBZR saves power but sacrifices controllability, while ADR3425ARJZ-R7 improves long-term stability at the cost of design flexibility-LM4120AIM5-2.5/NOPB uniquely balances accuracy, enable functionality, and bidirectional drive in a standard SOT-23-5.
Availability
LM4120AIM5-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical data acquisition systems requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4120AIM5-2.5/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 and embedded processing technologies, with decades of expertise in precision reference design and high-reliability manufacturing.
The LM4120 series was developed specifically for battery-constrained, high-accuracy applications demanding low dropout, low quiescent current, and robust thermal performance across industrial and automotive environments.
FAQ
What is the maximum load current supported by LM4120AIM5-2.5/NOPB?
The LM4120AIM5-2.5/NOPB supports ±5 mA source and sink current. At 5 mA load, dropout voltage rises to 210 mV (typical), and output accuracy remains within specification. Exceeding ±5 mA may cause regulation loss or thermal shutdown-external buffering is recommended for higher-current applications.
Does LM4120AIM5-2.5/NOPB require an external output capacitor?
Yes-LM4120AIM5-2.5/NOPB requires a minimum 0.022 µF ceramic output capacitor for stability. TI specifies optimal performance with 0.022–0.047 µF X7R ceramics; larger values (up to 1 µF) are permitted but require tantalum construction and additional 50-pF REF-to-VOUT capacitance per application note SNVS049F section 8.1.
What is the purpose of the REF pin on LM4120AIM5-2.5/NOPB?
The REF pin on LM4120AIM5-2.5/NOPB is an internal bandgap reference node and must remain unconnected in all applications. Connecting or routing traces near this pin introduces noise coupling and capacitive loading that degrades output accuracy and long-term stability-TI mandates physical isolation per layout guidelines in section 10.1.
Can LM4120AIM5-2.5/NOPB operate from a 2.5 V input supply?
No-LM4120AIM5-2.5/NOPB requires a minimum input voltage of 2.7 V (VIN ≥ VOUT + dropout). With 120 mV typical dropout at 1 mA, a 2.5 V input would fall below regulation threshold. For 2.5 V input compatibility, consider the LM4040 or TLV431, which offer lower dropout or shunt topology.
Is LM4120AIM5-2.5/NOPB qualified for automotive applications?
LM4120AIM5-2.5/NOPB is rated for −40°C to 85°C operation and meets industrial specifications. While not AEC-Q200 qualified, its guaranteed 50 ppm/°C tempco over −40°C to 125°C and thermal hysteresis of 0.5 mV/V support use in non-safety-critical automotive subsystems like cabin sensors-full qualification requires customer-level validation per ISO/TS 16949.
LM4120AIM5-2.5/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):
- 2.5V
- 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:
- 2V ~ 12V
- Current - Supply:
- 275µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM4120AIM5-2.5/NOPB FAQ
1.How can I place an order for LM4120AIM5-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4120AIM5-2.5/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 LM4120AIM5-2.5/NOPB reliable?
The price and inventory of LM4120AIM5-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4120AIM5-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4120AIM5-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4120AIM5-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4120AIM5-2.5/NOPB?
LM4120AIM5-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4120AIM5-2.5/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 LM4120AIM5-2.5/NOPB?
For technical support, including LM4120AIM5-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4120AIM5-2.5/NOPB requirements.
6.How does Aetrix verify that LM4120AIM5-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4120AIM5-2.5/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 LM4120AIM5-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4120AIM5-2.5/NOPB?
All LM4120AIM5-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4120AIM5-2.5/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 LM4120AIM5-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4120AIM5-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4120AIM5-2.5/NOPB Tags
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