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Texas Instruments LM4120AIM5X-4.1/NOPB
- Part No.:
- LM4120AIM5X-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4120AIM5X-4.1/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,450
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Product details
Overview
LM4120AIM5X-4.1/NOPB from Texas Instruments is a precision micropower low-dropout bandgap voltage reference delivering 4.096 V output with ±0.2% initial accuracy, 50 ppm/°C temperature coefficient, and 120 mV typical dropout at 1 mA load - enabling stable reference operation in battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the LM4120AIM5X-4.1/NOPB datasheet, LM4120AIM5X-4.1/NOPB pinout, LM4120AIM5X-4.1/NOPB application, or LM4120AIM5X-4.1/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) performance validation.
Technical Context
The LM4120AIM5X-4.1/NOPB implements a bandgap-based reference core with integrated enable control logic and low-impedance output buffer. It operates across 2 V to 12 V input range while maintaining 4.096 V output regulation within ±0.2% over temperature and load variations.
Its functional modes are defined by the Enable pin: pulled to VIN for normal operation (160 µA typical supply current), pulled to GND for shutdown (<2 µA quiescent current). The REF pin is internally connected and must remain unconnected externally to avoid noise coupling and capacitive loading errors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V ±0.2% initial accuracy - ensures precise ADC/DAC biasing and sensor excitation without calibration overhead. |
| Temperature Coefficient | 50 ppm/°C (−40°C to 125°C) - guarantees ≤2.05 mV total drift over full extended range, critical for high-resolution measurement systems. |
| Dropout Voltage | 120 mV typical at 1 mA - allows operation with VIN as low as 4.216 V, supporting single-cell Li-ion or dual-cell alkaline supplies. |
| Supply Current | 160 µA typical - enables multi-year battery life in always-on portable instruments with minimal standby power penalty. |
| Enable Thresholds | VH = 2.4 V, VL = 0.4 V - compatible with standard CMOS/TTL logic for reliable remote on/off control without level-shifting. |
| Output Drive | ±5 mA source/sink - supports direct driving of ADC reference inputs, op-amp bias networks, or small DAC loads without external buffering. |
| Noise (0.1–10 Hz) | 20 µVPP - low enough for 16-bit+ data acquisition where reference noise dominates system ENOB. |
Pinout & Package
SOT-23-5 (DBV) package, 1.60 mm × 2.90 mm body size, RoHS-compliant, tape-and-reel packaging (3000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF | Reference node | Internally connected; must remain unconnected externally to prevent noise injection and output instability. |
| 2 - GND | Ground reference | Primary 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 supply current to <2 µA. |
| 4 - VIN | Positive supply input | Accepts 2 V to 12 V; minimum headroom determined by dropout voltage (e.g., 4.216 V for 4.096 V output at 1 mA). |
| 5 - VOUT | Regulated reference output | Delivers stable 4.096 V with ±5 mA drive capability; requires 0.022 µF–1 µF ceramic/tantalum output capacitor for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Operation | 120 mV typical at 1 mA enables use with ultra-low input margins - essential for energy-constrained portable designs. |
| Enable-Controlled Power-Down | Reduces supply current to <2 µA, extending battery life in intermittent-sampling applications like wireless sensors. |
| High Initial Accuracy | ±0.2% (A-grade) eliminates need for post-production trimming in precision analog signal chains. |
| Wide Input Voltage Range | 2 V to 12 V operation supports diverse supply architectures including single-cell Li-ion, USB, and industrial rails. |
| Low Output Noise | 20 µVPP (0.1–10 Hz) ensures minimal contribution to system noise floor in high-resolution data converters. |
Applications
| Portable Instrumentation | Industrial Data Acquisition |
|---|---|
|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and battery-backed operation. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and sensor excitation circuitry. Use Value: 4.096 V output matches common 12-bit/16-bit ADC full-scale ranges; ±0.2% accuracy avoids system-level calibration. |
Use Scenario: DIN-rail mounted PLC analog input module measuring 4–20 mA loop signals. IC Role / Device Role / Timing Role: Stable reference for precision current-to-voltage conversion and ADC biasing. Use Value: 50 ppm/°C tempco ensures ≤0.4% error over −40°C to 85°C ambient, meeting industrial grade specifications. |
| Battery-Powered Sensors | Medical Monitoring Devices |
|
Use Scenario: Wireless ECG patch with intermittent sampling and coin-cell battery. IC Role / Device Role / Timing Role: Reference for low-power analog front-end and ADC during active measurement bursts. Use Value: 160 µA typical supply current + <2 µA shutdown mode extends 200 mAh CR2032 battery life to >2 years. |
Use Scenario: Portable pulse oximeter requiring accurate LED current control and photodiode signal conditioning. IC Role / Device Role / Timing Role: Reference for precision current sources driving LEDs and for ADC reference in analog signal path. Use Value: Low 20 µVPP noise prevents degradation of weak photodiode signals; 4.096 V enables exact 12-bit resolution mapping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3040AIDBZR | 4.096 V, ±0.2%, 50 ppm/°C, 50 µA supply current, no enable pin, SOT-23-3 package | Lacks enable control and sink capability; lower quiescent current but no power-down mode | Select when ultra-low supply current is prioritized over remote shutdown and bidirectional load drive. |
| ADR3440ARJZ-R7 | 4.096 V, ±0.1%, 10 ppm/°C, 120 µA supply current, no enable pin, SOT-23-5 package | Higher accuracy and lower tempco, but no enable function and only source-only output (no sink) | Select when highest stability is required and system-level power management handles shutdown externally. |
Compared with LM4120AIM5X-4.1/NOPB, REF3040AIDBZR offers lower quiescent current but sacrifices enable control and sink capability, while ADR3440ARJZ-R7 delivers superior accuracy and thermal stability at the cost of functional flexibility and higher cost.
Availability
LM4120AIM5X-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and battery-powered medical devices requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4120AIM5X-4.1/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 is designed for high-accuracy, low-power voltage reference applications in portable, battery-operated, and industrial systems where stability, small size, and enable-controlled power management are critical.
FAQ
What is the output voltage tolerance of LM4120AIM5X-4.1/NOPB over temperature?
The LM4120AIM5X-4.1/NOPB maintains ±0.2% initial accuracy at 25°C, with a guaranteed temperature coefficient of 50 ppm/°C across −40°C to 125°C. Over the industrial range (−40°C to 85°C), total output variation remains within ±0.35% including initial error and thermal drift - verified per TI's Electrical Characteristics table for the 4.096 V A-grade variant.
Does LM4120AIM5X-4.1/NOPB support sinking current, and how much?
Yes, LM4120AIM5X-4.1/NOPB provides true bidirectional output drive: it can source and sink up to ±5 mA. This capability allows direct interfacing with op-amp inputs, current-sinking DAC references, or pull-down loads without external components - confirmed in the "Source and Sink Current Output" feature and Electrical Characteristics tables.
What is the minimum input voltage required for LM4120AIM5X-4.1/NOPB to regulate at full load?
At 1 mA load, the LM4120AIM5X-4.1/NOPB requires VIN ≥ VOUT + 120 mV (typical), i.e., ≥4.216 V. At 5 mA, dropout rises to 180–210 mV, so VIN must be ≥4.276–4.306 V. The device remains functional down to 2 V input but cannot regulate below the dropout threshold - specified in Section 6.5 under VIN−VOUT.
Can the REF pin of LM4120AIM5X-4.1/NOPB be connected to ground or bypassed?
No - the REF pin of LM4120AIM5X-4.1/NOPB must remain unconnected in all applications. It is an internal node sensitive to noise and capacitive loading; connecting it to ground, VOUT, or any capacitor will degrade accuracy, increase noise, or cause instability - explicitly stated in the Pin Functions table and Section 7.3.2.
Is LM4120AIM5X-4.1/NOPB qualified for automotive applications?
LM4120AIM5X-4.1/NOPB is specified for the industrial temperature range (−40°C to 85°C) and is not AEC-Q200 qualified. While it operates within automotive cabin temperature limits, TI does not certify it for automotive use; for such applications, consider the LM4120-Q1 or other AEC-Q200 qualified alternatives.
LM4120AIM5X-4.1/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):
- 4.096V
- 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-4.1/NOPB FAQ
1.How can I place an order for LM4120AIM5X-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4120AIM5X-4.1/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-4.1/NOPB reliable?
The price and inventory of LM4120AIM5X-4.1/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-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4120AIM5X-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4120AIM5X-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4120AIM5X-4.1/NOPB?
LM4120AIM5X-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4120AIM5X-4.1/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-4.1/NOPB?
For technical support, including LM4120AIM5X-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4120AIM5X-4.1/NOPB requirements.
6.How does Aetrix verify that LM4120AIM5X-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4120AIM5X-4.1/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-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4120AIM5X-4.1/NOPB?
All LM4120AIM5X-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4120AIM5X-4.1/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-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4120AIM5X-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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