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Texas Instruments LM4120AIM5-5.0/NOPB
- Part No.:
- LM4120AIM5-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4120AIM5-5.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,083
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Product details
Overview
LM4120AIM5-5.0/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 - optimized for battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the LM4120AIM5-5.0/NOPB datasheet, LM4120AIM5-5.0/NOPB pinout, LM4120AIM5-5.0/NOPB application, or LM4120AIM5-5.0/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 LM4120AIM5-5.0/NOPB implements a bandgap-based reference core with integrated enable logic and low-impedance output buffer. Its architecture supports operation from 2 V to 12 V input while maintaining regulation down to VIN − VOUT = 120 mV (typ) at 1 mA.
Enable functionality uses an analog input with 2.4 V high-threshold and 0.4 V low-threshold, requiring ~6 µA turn-on current. The REF pin is internally connected and must remain unconnected externally to avoid noise coupling and capacitive loading effects.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±0.2% (A-grade initial accuracy at 25°C) |
| Temperature Coefficient | 50 ppm/°C (ensured from −40°C to 125°C) |
| Dropout Voltage | 120 mV typical at 1 mA load - enables regulation from VIN ≥ 5.12 V |
| Supply Current | 160 μA typical - supports multi-year battery life in low-duty-cycle systems |
| Power-Down Current | <2 μA when EN ≤ 0.4 V - reduces standby consumption by >98% |
| Load Drive | ±5 mA source/sink - sufficient to drive ADC references, op-amp bias networks, and DAC buffers |
| Noise (0.1–10 Hz) | 20 µVPP - suitable for 16-bit+ data acquisition without external filtering |
Pinout & Package
SOT-23-5 (DBV) package, 1.60 mm × 2.90 mm body size, RoHS-compliant, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF | Reference node | Internally connected; must be left unconnected on PCB to prevent noise injection and instability |
| 2 - GND | Ground reference | Primary return path for load current and supply current; requires low-impedance connection to system ground plane |
| 3 - EN | Enable control input | Analog input with 2.4 V min high threshold; pulling to GND disables output and reduces current to <2 μA |
| 4 - VIN | Positive supply input | Accepts 2 V to 12 V; minimum headroom 120 mV above VOUT for regulation |
| 5 - VOUT | Regulated reference output | 5.0 V ±0.2% output capable of sourcing/sinking ±5 mA; requires 0.022–0.047 µF ceramic capacitor to GND for stability |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Operation | 120 mV typical at 1 mA enables use with Li-ion (3.0–4.2 V) and single-cell alkaline supplies |
| Enable-Controlled Power-Down | Reduces quiescent current to <2 μA - critical for duty-cycled sensor nodes and portable meters |
| High Initial Accuracy | ±0.2% (A-grade) eliminates need for post-manufacturing calibration in mid-precision applications |
| Low Output Noise | 20 µVPP (0.1–10 Hz) supports 16-bit SAR ADCs without additional filtering stages |
| Wide Input Range | 2 V to 12 V operation accommodates diverse supply rails including buck-regulated and unregulated battery inputs |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitoring node sampling temperature, humidity, and pressure at 10-second intervals. IC Role / Device Role / Timing Role: Provides stable 5.0 V reference for 16-bit sigma-delta ADC and microcontroller ADC calibration. Use Value: 50 ppm/°C drift and 20 µVPP noise ensure <±0.01% measurement error across −25°C to 60°C operating range. |
Use Scenario: 4–20 mA loop-powered transmitter conditioning RTD and thermocouple signals in factory automation. IC Role / Device Role / Timing Role: Supplies precision excitation voltage and ADC reference in isolated analog front-end. Use Value: ±5 mA drive capability powers bridge sensors directly; enable pin synchronizes reference activation with measurement cycle. |
| Handheld Test Equipment | Medical Vital Sign Monitors |
Use Scenario: Portable multimeter performing DC voltage, resistance, and continuity measurements with auto-ranging. IC Role / Device Role / Timing Role: Serves as primary reference for dual-slope integrator and internal DAC calibration. Use Value: 0.2% initial accuracy and thermal hysteresis <0.5 mV/V reduce recalibration frequency to once per year. |
Use Scenario: Wearable ECG patch digitizing biopotential signals with 12-bit resolution and 250 SPS sampling. IC Role / Device Role / Timing Role: Generates clean 5.0 V rail for analog signal chain and ADC reference in ultra-low-power mode. Use Value: 160 μA supply current and enable-controlled shutdown extend single CR2032 battery life beyond 6 months. |
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 | Lacks power-down capability - unsuitable for intermittent measurement systems | Select when lowest quiescent current is prioritized over dynamic control |
| ADR3450ARJZ-R7 | 5.0 V, 0.1% accuracy, 10 ppm/°C, no enable, 120 μA supply current, SOT-23-5 | Higher accuracy and lower drift, but no shutdown mode and higher cost | Select when long-term stability and temperature performance outweigh enable requirement |
Compared with REF3050AIDBVR and ADR3450ARJZ-R7, the LM4120AIM5-5.0/NOPB uniquely balances A-grade accuracy, enable-controlled power-down, and SOT-23-5 footprint - making it optimal for battery-constrained systems needing both precision and dynamic power management.
Availability
LM4120AIM5-5.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and handheld test equipment requiring stable component supply with guaranteed long-term availability.
Supply support for LM4120AIM5-5.0/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 power management solutions.
The LM4120 series was designed for micropower, low-dropout voltage reference applications in battery-operated and space-constrained systems - emphasizing accuracy, thermal stability, and enable-driven power efficiency.
FAQ
What is the operating temperature range for the LM4120AIM5-5.0/NOPB?
The LM4120AIM5-5.0/NOPB is specified for industrial operation from −40°C to +85°C. While its temperature coefficient (50 ppm/°C) is ensured over −40°C to +125°C, full electrical performance-including initial accuracy and load regulation-is guaranteed only within the −40°C to +85°C range per the official datasheet.
Does the LM4120AIM5-5.0/NOPB require an external output capacitor?
Yes, the LM4120AIM5-5.0/NOPB requires a 0.022 µF to 0.047 µF ceramic output capacitor connected between VOUT and GND for stability. Larger values up to 1 µF are permissible with tantalum capacitors, but ceramic capacitors exceeding 0.047 µF may cause oscillation unless validated per TI's layout guidelines.
Can the REF pin of the LM4120AIM5-5.0/NOPB be connected to ground or bypassed?
No - the REF pin of the LM4120AIM5-5.0/NOPB must remain unconnected (floating) on the PCB. It is internally connected to the bandgap core and highly sensitive to noise and capacitive loading; any external connection degrades accuracy, increases noise, and risks instability.
What is the minimum input voltage required for regulation at 5.0 V output?
The LM4120AIM5-5.0/NOPB maintains regulation with a minimum input voltage of 5.12 V (5.0 V + 120 mV typical dropout) at 1 mA load. At zero load, dropout drops to 45–65 mV, allowing regulation down to ~5.065 V - but design margin should account for worst-case 180 mV dropout at 5 mA and temperature extremes.
How does the enable function behave during power-up?
The LM4120AIM5-5.0/NOPB requires the EN pin to be pulled to VIN (logic high) for normal operation. During power-up, EN must rise above 2.4 V (min) while sourcing ~6 µA; a slow-rising or floating EN pin causes erratic startup or failure to enable. TI recommends direct connection to VIN if enable control is unused.
LM4120AIM5-5.0/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
LM4120AIM5-5.0/NOPB FAQ
1.How can I place an order for LM4120AIM5-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4120AIM5-5.0/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 LM4120AIM5-5.0/NOPB reliable?
The price and inventory of LM4120AIM5-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4120AIM5-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4120AIM5-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4120AIM5-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4120AIM5-5.0/NOPB?
LM4120AIM5-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4120AIM5-5.0/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 LM4120AIM5-5.0/NOPB?
For technical support, including LM4120AIM5-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4120AIM5-5.0/NOPB requirements.
6.How does Aetrix verify that LM4120AIM5-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4120AIM5-5.0/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 LM4120AIM5-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4120AIM5-5.0/NOPB?
All LM4120AIM5-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4120AIM5-5.0/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 LM4120AIM5-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4120AIM5-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4120AIM5-5.0/NOPB Tags
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