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Texas Instruments LM4120AIM5X-5.0/NOPB
- Part No.:
- LM4120AIM5X-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4120AIM5X-5.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,186
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Product details
Overview
LM4120AIM5X-5.0/NOPB from Texas Instruments is a precision micropower low-dropout bandgap voltage reference delivering 5.0 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 LM4120AIM5X-5.0/NOPB datasheet, LM4120AIM5X-5.0/NOPB pinout, LM4120AIM5X-5.0/NOPB application, or LM4120AIM5X-5.0/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-5.0/NOPB implements a bandgap-based reference core with internal error amplifier and pass transistor, enabling operation from VIN = VOUT + 120 mV (min) up to 12 V. Its enable pin controls analog startup via ~6 µA input current and logic-level thresholds (VH = 2.4 V, VL = 0.4 V), supporting remote on/off without external circuitry.
It achieves 0.1 Hz–10 kHz output noise of 36 µVPP and maintains load regulation of ≤0.04%/mA (1–5 mA), line regulation of ≤0.008%/V, and thermal hysteresis of 0.5 mV/V across −40°C to 125°C-ensuring stable reference performance in precision ADCs, DACs, and sensor front-ends where supply headroom and long-term drift are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±0.2% (A-grade initial accuracy at 25°C; ensures minimal calibration burden in 16-bit+ data converters) |
| Temperature Coefficient | 50 ppm/°C (ensured from −40°C to 125°C; supports industrial-grade accuracy without external compensation) |
| Dropout Voltage | 120 mV typical at 1 mA (enables operation from 5.12 V supply; critical for low-headroom battery systems) |
| Supply Current | 160 μA typical (supports >1-year runtime on coin-cell batteries in always-on monitoring applications) |
| Power-Down Current | <2 μA (achieved by pulling EN to GND; reduces quiescent draw during sleep modes) |
| Output Drive | ±5 mA (supports direct driving of ADC reference inputs, op-amp bias networks, and small DAC loads) |
| Noise (0.1–10 Hz) | 20 µVPP (low flicker noise preserves SNR in precision measurement front-ends) |
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 | Must remain unconnected; sensitive to noise and capacitive loading-requires isolation in PCB layout |
| 2 - GND | Ground reference | Primary return path for load current and supply current; connects to system ground plane |
| 3 - EN | Enable control input | Analog input requiring ≥2.4 V for active mode; pulled to GND for shutdown; 6 µA typical turn-on current |
| 4 - VIN | Positive supply input | Accepts 2 V to 12 V; minimum headroom = VOUT + 120 mV at 1 mA; bypass capacitor recommended |
| 5 - VOUT | Regulated reference output | 5.0 V ±0.2%; drives capacitive loads 0.022–0.047 µF (ceramic) or up to 1 µF (tantalum with REF cap) |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout operation | 120 mV typical at 1 mA enables use with Li-ion (3.0–4.2 V) or dual-AA (2.4–3.2 V) supplies |
| Enable-controlled power-down | Reduces supply current to <2 μA-essential for duty-cycled sensors and wireless transceivers |
| High output accuracy grade | A-grade ±0.2% initial tolerance eliminates need for post-manufacture trimming in most 12–16 bit systems |
| Stable with small ceramic caps | 0.022 µF minimum output capacitance simplifies layout and avoids costly tantalum or polymer alternatives |
| Wide input voltage range | 2 V to 12 V operation supports both low-voltage portable rails and industrial 5–12 V supplies |
Applications
| Portable Instrumentation | Battery-Powered Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and auto-ranging front-end. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and internal DAC calibration. Use Value: ±0.2% initial accuracy and 50 ppm/°C drift ensure full-scale error remains <0.5 LSB across operating temperature without recalibration. |
Use Scenario: Wireless environmental sensor node logging temperature/humidity every 10 seconds. IC Role / Device Role / Timing Role: Stable reference for precision analog front-end and ADC during active sampling bursts. Use Value: 160 μA supply current and <2 μA shutdown current extend CR2032 battery life beyond 2 years in intermittent-use mode. |
| Precision Regulator Reference | Medical Sensor Signal Chain |
Use Scenario: Low-noise LDO reference input for programmable gain amplifier in portable ECG monitor. IC Role / Device Role / Timing Role: High-stability reference establishing gain-setting voltage for analog signal conditioning. Use Value: 36 µVPP (10 Hz–10 kHz) output noise prevents degradation of ECG signal SNR below 100 dB. |
Use Scenario: Blood glucose meter using electrochemical sensor with ratiometric ADC measurement. IC Role / Device Role / Timing Role: Ratiometric reference for excitation and measurement paths to cancel supply variation effects. Use Value: Load regulation ≤0.04%/mA ensures consistent sensor biasing across varying electrode impedance conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3050AIDBVR | Fixed 5.0 V, ±0.2% accuracy, 50 ppm/°C, but no enable pin; 50 μA supply current (lower than LM4120AIM5X-5.0/NOPB) | Lacks power-down capability-unsuitable for ultra-low-power wake-up architectures | Select when lowest quiescent current is primary requirement and enable control is unnecessary |
| ADR3450ARJZ-R7 | 5.0 V, ±0.1% initial accuracy, 10 ppm/°C, enable pin, but 180 μA supply current and 200 mV dropout at 1 mA | Higher accuracy and lower drift, but higher dropout limits use with sub-5.2 V supplies | Select when tighter drift spec is required and supply headroom ≥200 mV is available |
Compared with REF3050AIDBVR and ADR3450ARJZ-R7, the LM4120AIM5X-5.0/NOPB uniquely balances ultra-low dropout (120 mV), enable functionality, and A-grade accuracy in a cost-optimized SOT-23-5 package-making it optimal for space-constrained, battery-operated systems needing both precision and dynamic power control.
Availability
LM4120AIM5X-5.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data acquisition, and precision regulator applications requiring stable component supply across extended production lifecycles.
Supply support for LM4120AIM5X-5.0/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 broad industrial portfolio coverage.
The LM4120 series was designed specifically for micropower, low-dropout voltage reference applications in portable, battery-sensitive, and high-accuracy measurement systems-emphasizing minimal supply current, tight initial tolerance, and robust thermal performance.
FAQ
What is the maximum input voltage rating for LM4120AIM5X-5.0/NOPB?
The absolute maximum input voltage for LM4120AIM5X-5.0/NOPB is 14 V, as specified in the Absolute Maximum Ratings table. Continuous operation above 12 V is not recommended; the device is characterized for reliable operation from 2 V to 12 V under recommended conditions. Exceeding 14 V risks permanent damage due to junction breakdown.
Does LM4120AIM5X-5.0/NOPB require an external output capacitor, and what value is recommended?
Yes, LM4120AIM5X-5.0/NOPB requires an external output capacitor for stability. The minimum recommended value is 0.022 µF ceramic; optimal range is 0.022–0.047 µF. Larger values up to 1 µF are permitted only with tantalum capacitors and require a 50-pF capacitor between VOUT and REF pins. Ceramic capacitors outside the 0.022–0.047 µF range may cause instability.
How does the enable pin function on LM4120AIM5X-5.0/NOPB, and what are its voltage thresholds?
The enable pin (Pin 3) controls device activation: connecting EN to VIN places LM4120AIM5X-5.0/NOPB in normal operation; pulling EN to GND forces shutdown. Logic high threshold is 2.4 V (min), logic low is 0.4 V (max) at 25°C. Input current is ~6 µA during turn-on. Floating the pin is not recommended-tie to VIN if enable functionality is unused.
What is the thermal hysteresis specification for LM4120AIM5X-5.0/NOPB, and how does it affect long-term accuracy?
LM4120AIM5X-5.0/NOPB has a thermal hysteresis of 0.5 mV/V over −40°C to 125°C, meaning output voltage shift after thermal cycling is ≤0.5 mV per volt of nominal output. For the 5.0 V version, this translates to ≤2.5 mV hysteresis-critical for applications requiring repeatable measurements after ambient temperature excursions, such as field-deployed test equipment.
Can LM4120AIM5X-5.0/NOPB sink current, and what is its rated sink capability?
Yes, LM4120AIM5X-5.0/NOPB can both source and sink up to ±5 mA. Sink capability is fully specified: load regulation remains ≤0.12%/mA for −1 mA to 0 mA and ≤0.01%/mA for −5 mA to −1 mA. This allows bidirectional current handling in ratiometric sensor interfaces, active filter biasing, and precision current-source configurations.
LM4120AIM5X-5.0/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):
- 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
LM4120AIM5X-5.0/NOPB FAQ
1.How can I place an order for LM4120AIM5X-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4120AIM5X-5.0/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-5.0/NOPB reliable?
The price and inventory of LM4120AIM5X-5.0/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-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4120AIM5X-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4120AIM5X-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4120AIM5X-5.0/NOPB?
LM4120AIM5X-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4120AIM5X-5.0/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-5.0/NOPB?
For technical support, including LM4120AIM5X-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4120AIM5X-5.0/NOPB requirements.
6.How does Aetrix verify that LM4120AIM5X-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4120AIM5X-5.0/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-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4120AIM5X-5.0/NOPB?
All LM4120AIM5X-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4120AIM5X-5.0/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-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4120AIM5X-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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