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Texas Instruments LM4120AIM5X-3.0/NOPB
- Part No.:
- LM4120AIM5X-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4120AIM5X-3.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,876
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Product details
Overview
LM4120AIM5X-3.0/NOPB from Texas Instruments is a precision micropower low-dropout bandgap voltage reference delivering 3.0 V output with ±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 sensing and ADC reference in battery-powered instrumentation.
For engineers reviewing the LM4120AIM5X-3.0/NOPB datasheet, LM4120AIM5X-3.0/NOPB pinout, LM4120AIM5X-3.0/NOPB application, or LM4120AIM5X-3.0/NOPB equivalent, key selection criteria include output accuracy over −40°C to 85°C, power-down current <2 μA, SOT-23-5 package compatibility, and stability with 0.022–0.047 µF ceramic output capacitors.
Technical Context
The LM4120AIM5X-3.0/NOPB implements a bandgap-based reference core with internal error amplifier and pass transistor, enabling operation from VIN = VOUT + 120 mV up to 12 V. Its enable pin controls analog startup/shutdown with logic-compatible thresholds (VH = 2.4 V, VL = 0.4 V) and <2 μA shutdown current.
It achieves 20 µVPP (0.1–10 Hz) output noise and 36 µVPP (10 Hz–10 kHz), with load regulation of 0.03%/mA (0–1 mA) and line regulation of 0.0007%/V-ensured across industrial temperature range without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal, ±0.2% initial accuracy at 25°C - enables direct interface with 3-V ADCs and DACs without trimming. |
| Temperature Coefficient | 50 ppm/°C (−40°C to 125°C) - ensures ≤1.5 mV drift over full industrial range, critical for precision sensor signal chains. |
| Dropout Voltage | 120 mV typical at 1 mA - supports operation from 3.12 V input, ideal for single-cell Li-ion or 3.3-V rail margining. |
| Supply Current | 160 μA typical - extends battery life in portable multimeters and handheld data loggers beyond 10 years on CR2032. |
| Enable Thresholds | VH = 2.4 V, VL = 0.4 V - compatible with standard CMOS/TTL logic; allows microcontroller GPIO direct control without level-shifting. |
| Output Drive | ±5 mA source/sink - drives 10-kΩ ADC reference inputs or buffers multiple op-amps without external gain stage. |
| Power-Down Current | <2 μA - reduces system standby power to sub-μW levels in always-on IoT edge nodes. |
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 |
|---|---|---|
| REF | Reference node | Must remain unconnected; sensitive to noise and capacitive loading - requires guard ring and no routing underneath. |
| GND | Ground reference | Primary return path for load current and quiescent supply; must connect to low-impedance analog ground plane. |
| Enable | Startup control input | Analog input requiring ≥2.4 V for active mode; pulled to VIN for always-on operation or driven by MCU GPIO. |
| VIN | Input supply | Accepts 3.12 V to 12 V; minimum headroom defined by dropout voltage - decoupling capacitor recommended. |
| VOUT | Stable 3.0 V output | Delivers regulated reference to ADCs, DACs, or comparators; requires 0.022–0.047 µF ceramic capacitor directly at pin. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 120 mV at 1 mA enables use with ultra-low-input rails like partially discharged batteries. |
| Enable-controlled power-down | Reduces supply current to <2 μA - essential for duty-cycled sensor nodes and energy-harvesting systems. |
| High output accuracy | ±0.2% initial tolerance eliminates factory calibration in portable test equipment and medical monitors. |
| Low output noise | 20 µVPP (0.1–10 Hz) minimizes quantization error in 16-bit+ SAR ADCs and precision weigh scales. |
| Wide input voltage range | Operates from 3.12 V to 12 V - supports both single-supply and multi-rail industrial PLC I/O modules. |
Applications
| Portable Instrumentation | Industrial Data Acquisition |
|---|---|
Use Scenario: Handheld digital multimeter measuring DC voltage with 4½-digit resolution. IC Role / Device Role / Timing Role: Primary 3.0-V reference for 20-bit delta-sigma ADC and front-end signal conditioning. Use Value: ±0.2% accuracy and 50 ppm/°C drift ensure measurement repeatability across field temperature variations without recalibration. | Use Scenario: Modular PLC analog input module acquiring 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Stable reference for isolated 16-bit SAR ADC and programmable gain amplifier. Use Value: 120-mV dropout allows operation from 3.3-V isolated DC-DC converter, while ±5 mA drive supports multiple channel buffering. |
| Battery-Powered Medical Sensors | Automotive Diagnostic Tools |
Use Scenario: Wearable ECG patch monitoring heart rate with low-power Bluetooth LE transmission. IC Role / Device Role / Timing Role: Reference for ultra-low-noise instrumentation amplifier and ADC sampling biopotential signals. Use Value: 20 µVPP (0.1–10 Hz) noise floor preserves microvolt-level ST-segment fidelity; 160 μA supply current extends battery life >3 months. | Use Scenario: OBD-II scan tool reading vehicle CAN bus sensor data and powering internal analog front ends. IC Role / Device Role / Timing Role: Precision reference for ADC measuring battery voltage, coolant temperature, and throttle position. Use Value: −40°C to 85°C guaranteed operation meets automotive ambient requirements; enable pin synchronizes reference activation with ignition state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3030AIDBZR | 3.0 V, ±0.2%, 50 ppm/°C, but no enable pin; 50 μA supply current; SOT-23-3 package. | Lacks power-down control - unsuitable for intermittent-sampling systems requiring sub-μA standby. | Select when lowest quiescent current is primary and enable functionality is unnecessary. |
| ADR3430ARJZ-R7 | 3.0 V, ±0.1%, 10 ppm/°C, no enable; 120 μA supply current; SOT-23-5 package. | Higher accuracy and lower drift, but no shutdown mode and higher cost - over-spec for many industrial applications. | Select only when long-term stability and ultra-low drift dominate over power management needs. |
Compared with REF3030AIDBZR and ADR3430ARJZ-R7, LM4120AIM5X-3.0/NOPB uniquely balances precision (±0.2%), ultra-low dropout (120 mV), and integrated enable control in SOT-23-5 - making it optimal for battery-constrained systems requiring both accuracy and dynamic power gating.
Availability
LM4120AIM5X-3.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and battery-powered medical sensors requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4120AIM5X-3.0/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and power management solutions.
The LM4120 series was designed specifically for high-accuracy, low-power voltage reference applications in portable, industrial, and automotive systems where space, power, and thermal constraints demand micropower operation with minimal dropout.
FAQ
What is the maximum input voltage for LM4120AIM5X-3.0/NOPB?
The absolute maximum input voltage for LM4120AIM5X-3.0/NOPB is 14 V, but the recommended operating range is 3.12 V to 12 V. Exceeding 12 V may increase power dissipation and thermal stress without functional benefit, and operation above 14 V risks permanent damage per the Absolute Maximum Ratings table in the datasheet. LM4120AIM5X-3.0/NOPB maintains specified performance within its 3.12–12 V range.
Does LM4120AIM5X-3.0/NOPB require an external output capacitor?
Yes, LM4120AIM5X-3.0/NOPB requires a minimum 0.022 µF ceramic output capacitor placed directly between VOUT and GND for loop stability and transient response. Values up to 0.047 µF ceramic are fully supported; larger values (up to 1 µF) require tantalum construction and additional layout precautions. LM4120AIM5X-3.0/NOPB will not remain stable without this capacitor.
Can the REF pin of LM4120AIM5X-3.0/NOPB be connected to ground or bypassed?
No, the REF pin of LM4120AIM5X-3.0/NOPB must remain unconnected in all cases. It is internally connected to a sensitive bandgap node and is highly susceptible to noise and capacitive loading. Connecting it to ground, bypassing it, or routing traces nearby degrades accuracy and increases drift. LM4120AIM5X-3.0/NOPB datasheet explicitly mandates leaving REF floating with guard-ring isolation.
What is the typical power-down current of LM4120AIM5X-3.0/NOPB?
The typical power-down current of LM4120AIM5X-3.0/NOPB is less than 2 μA when the Enable pin is held ≤0.2 V. At −40°C to 85°C, the maximum specified power-down current is 2 μA. This ultra-low standby current makes LM4120AIM5X-3.0/NOPB suitable for energy-harvesting and battery-backed applications where multi-year operation is required.
Is LM4120AIM5X-3.0/NOPB qualified for automotive applications?
LM4120AIM5X-3.0/NOPB is specified for the industrial temperature range (−40°C to +85°C) and is not AEC-Q200 qualified. While it operates reliably across that range and is used in some automotive diagnostic tools, it lacks formal automotive qualification. For safety-critical or under-hood applications, TI recommends automotive-grade alternatives such as the REF5030QDR. LM4120AIM5X-3.0/NOPB is appropriate for cabin-mounted, non-safety-critical automotive electronics.
LM4120AIM5X-3.0/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):
- 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-3.0/NOPB FAQ
1.How can I place an order for LM4120AIM5X-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4120AIM5X-3.0/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 LM4120AIM5X-3.0/NOPB reliable?
The price and inventory of LM4120AIM5X-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4120AIM5X-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4120AIM5X-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4120AIM5X-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4120AIM5X-3.0/NOPB?
LM4120AIM5X-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4120AIM5X-3.0/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 LM4120AIM5X-3.0/NOPB?
For technical support, including LM4120AIM5X-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4120AIM5X-3.0/NOPB requirements.
6.How does Aetrix verify that LM4120AIM5X-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4120AIM5X-3.0/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 LM4120AIM5X-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4120AIM5X-3.0/NOPB?
All LM4120AIM5X-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4120AIM5X-3.0/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 LM4120AIM5X-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4120AIM5X-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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