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Texas Instruments LM4120AIM5X-3.3/NOPB
- Part No.:
- LM4120AIM5X-3.3/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4120AIM5X-3.3/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,251
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Product details
Overview
LM4120AIM5X-3.3/NOPB from Texas Instruments is a precision micropower low-dropout bandgap voltage reference delivering 3.3 V output with ±0.2% initial accuracy, 50 ppm/°C temperature coefficient, and 120 mV typical dropout at 1 mA load-designed for battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the LM4120AIM5X-3.3/NOPB datasheet, LM4120AIM5X-3.3/NOPB pinout, LM4120AIM5X-3.3/NOPB application, or LM4120AIM5X-3.3/NOPB equivalent, key selection criteria include enable-controlled power-down (ISS < 2 µA), ±5 mA source/sink capability, SOT-23-5 package compatibility, and industrial temperature range (−40°C to 85°C) operation.
Technical Context
The LM4120AIM5X-3.3/NOPB implements a bandgap-based reference core with integrated enable control logic and low-impedance output buffer. Its architecture supports stable operation from VIN = VOUT + 120 mV up to 12 V while maintaining 160 µA typical supply current and sub-2 µA shutdown current.
Functional modes are determined solely by the analog Enable pin: pulled to VIN for normal operation (output active), pulled to GND for shutdown (output disabled, ISS < 2 µA). The REF pin is internally connected and must remain unconnected externally to avoid noise sensitivity and capacitive loading effects.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±0.2% (A-grade initial accuracy ensures minimal calibration overhead in precision ADC/DAC biasing) |
| Temperature Coefficient | 50 ppm/°C (ensured over −40°C to 125°C; enables stable performance across industrial thermal cycling) |
| Dropout Voltage | 120 mV typical at 1 mA (allows operation from 3.42 V input in 3.3 V systems, extending battery life) |
| Supply Current | 160 µA typical (enables multi-year operation in coin-cell–powered IoT sensors) |
| Power-Down Current | <2 µA (reduces standby power by >98% vs active mode, critical for duty-cycled measurement systems) |
| Output Drive | ±5 mA (supports direct driving of SAR ADC reference inputs and op-amp bias networks without external buffers) |
| Line Regulation | 0.008 %/V (limits output drift to <264 µV per volt input change, preserving 12-bit+ accuracy) |
Pinout & Package
SOT-23-5 (DBV) package, 1.60 mm × 2.90 mm body size, RoHS-compliant, tape-and-reel (3000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF | Reference node | Internally connected; must remain unconnected externally to prevent noise coupling and instability |
| 2 - GND | Ground reference | Return path for load current and internal bias; requires low-impedance PCB connection to minimize ground bounce |
| 3 - EN | Enable control input | Analog input requiring ≥2.4 V for activation; pulling to GND disables output and reduces current to <2 µA |
| 4 - VIN | Input supply | Accepts 3.42 V to 12 V; minimum headroom defined by dropout voltage at target load |
| 5 - VOUT | Regulated output | 3.3 V reference source capable of sourcing or sinking up to ±5 mA with ≤0.04 %/mA load regulation |
Key Features
| Feature | Design Value |
|---|---|
| Enable-controlled shutdown | Reduces supply current to <2 µA, enabling ultra-low-power sleep modes in portable instruments |
| Low dropout voltage | 120 mV at 1 mA allows operation from single Li-ion or two alkaline cells without intermediate regulators |
| High output accuracy | ±0.2% initial tolerance eliminates need for post-manufacture trimming in medical sensor front-ends |
| Source/sink capability | ±5 mA drive strength supports direct interfacing with precision op-amps and ADC reference inputs |
| Stable with ceramic capacitors | Works with 0.022 µF–0.047 µF ceramic output caps-no tantalum required, reducing BOM cost and size |
Applications
| Portable Data Loggers | Battery-Powered Medical Sensors |
|---|---|
Use Scenario: Continuous 12-bit temperature/humidity logging in handheld environmental monitors powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Primary voltage reference for SAR ADC and microcontroller VREF input, enabling accurate analog-to-digital conversion. Use Value: 160 µA supply current and <2 µA shutdown extend battery life beyond 3 years in 1-sample-per-minute duty cycle. | Use Scenario: Wearable ECG patch acquiring biopotential signals with low-noise amplification and digitization. IC Role / Device Role / Timing Role: Precision 3.3 V reference for instrumentation amplifier biasing and ADC reference, ensuring signal integrity. Use Value: ±0.2% accuracy and 50 ppm/°C TC maintain diagnostic-grade measurement stability across body-temperature variations. |
| Industrial Field Transmitters | Automotive Cabin Air Quality Modules |
Use Scenario: 4–20 mA loop-powered pressure transmitter operating in harsh factory environments (−40°C to 85°C). IC Role / Device Role / Timing Role: Stable excitation source for bridge sensors and reference for DAC-driven current output stage. Use Value: Guaranteed 50 ppm/°C TC over full industrial range eliminates recalibration during seasonal thermal cycling. | Use Scenario: Compact CO₂/VOC sensor module inside automotive HVAC control unit, powered from 5 V rail with intermittent wake-up. IC Role / Device Role / Timing Role: Enable-controlled reference for gas sensor signal conditioning and microcontroller ADC reference. Use Value: EN pin allows synchronous shutdown during MCU sleep, cutting reference power to <2 µA and meeting UNECE R100 low-power requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6126AASA33+ | 3.3 V, ±0.1% initial accuracy, 3 ppm/°C TC, 1.2 mA supply current, SO-8 package | Higher accuracy and lower TC but 7.5× higher quiescent current and larger footprint | Choose for metrology-grade systems where power is secondary to long-term drift performance |
| ADR3433ARJZ-R7 | 3.3 V, ±0.1% initial accuracy, 10 ppm/°C TC, 120 µA supply current, SOT-23-5 package | Lower TC and same package but no enable pin; fixed operation only | Choose when continuous reference operation is acceptable and ultra-low TC is prioritized over power gating |
Compared with MAX6126AASA33+ and ADR3433ARJZ-R7, the LM4120AIM5X-3.3/NOPB uniquely balances ultra-low power (160 µA), enable control (<2 µA shutdown), and SOT-23-5 size-making it optimal for space-constrained, battery-operated systems requiring dynamic power management.
Availability
LM4120AIM5X-3.3/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered medical sensors, and industrial field transmitters requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4120AIM5X-3.3/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 specializing in analog and embedded processing technologies, with leadership in precision analog ICs since 1951.
The LM4120 series was designed specifically for micropower, low-dropout voltage reference applications in portable and battery-critical systems-emphasizing accuracy, thermal stability, and enable-controlled energy efficiency.
FAQ
What is the maximum input voltage rating for LM4120AIM5X-3.3/NOPB?
The absolute maximum input voltage for LM4120AIM5X-3.3/NOPB is 14 V, as specified in the Absolute Maximum Ratings table. Operation above this level risks permanent damage. For reliable long-term use, the recommended maximum is 12 V under all conditions including line transients.
Does LM4120AIM5X-3.3/NOPB require an external output capacitor?
Yes-LM4120AIM5X-3.3/NOPB requires a minimum 0.022 µF ceramic output capacitor for stability. Values up to 0.047 µF ceramic are fully supported; larger values (up to 1 µF) require tantalum construction and additional layout precautions per TI's Application Note SNVS049F.
What is the function of the REF pin on LM4120AIM5X-3.3/NOPB?
The REF pin on LM4120AIM5X-3.3/NOPB is an internal reference node that must remain unconnected in all applications. Connecting any external component-including capacitors or traces-introduces noise sensitivity and can destabilize the output voltage of LM4120AIM5X-3.3/NOPB.
Can LM4120AIM5X-3.3/NOPB sink current, and how much?
Yes-LM4120AIM5X-3.3/NOPB can both source and sink up to ±5 mA. Sink capability enables active pull-down of ADC reference inputs or op-amp summing nodes, supporting bidirectional biasing configurations not possible with passive references.
Is LM4120AIM5X-3.3/NOPB qualified for automotive applications?
No-LM4120AIM5X-3.3/NOPB is rated for the industrial temperature range (−40°C to 85°C) and is not AEC-Q200 qualified. For automotive cabin modules operating within this ambient range, system-level validation is required; TI offers automotive-qualified alternatives like the LM4128 series.
LM4120AIM5X-3.3/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):
- 3.3V
- 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
LM4120AIM5X-3.3/NOPB FAQ
1.How can I place an order for LM4120AIM5X-3.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4120AIM5X-3.3/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 LM4120AIM5X-3.3/NOPB reliable?
The price and inventory of LM4120AIM5X-3.3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4120AIM5X-3.3/NOPB is usually 5 days.
3.What payment methods are accepted for LM4120AIM5X-3.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4120AIM5X-3.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4120AIM5X-3.3/NOPB?
LM4120AIM5X-3.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4120AIM5X-3.3/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 LM4120AIM5X-3.3/NOPB?
For technical support, including LM4120AIM5X-3.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4120AIM5X-3.3/NOPB requirements.
6.How does Aetrix verify that LM4120AIM5X-3.3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4120AIM5X-3.3/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 LM4120AIM5X-3.3/NOPB meets industry standards.
7.What is the process for return or replacement of LM4120AIM5X-3.3/NOPB?
All LM4120AIM5X-3.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4120AIM5X-3.3/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 LM4120AIM5X-3.3/NOPB part is unused and in its original packaging.
Return procedure for LM4120AIM5X-3.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4120AIM5X-3.3/NOPB Tags
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