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Texas Instruments LM4120AIM5X-2.0
- Part No.:
- LM4120AIM5X-2.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4120AIM5X-2.0.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,896
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Product details
Overview
LM4120AIM5X-2.0 from Texas Instruments is a precision micropower low-dropout bandgap voltage reference delivering 2.048 V output with ±0.2% initial accuracy, 50 ppm/°C temperature coefficient, and 120 mV typical dropout at 1 mA - used in battery-powered instrumentation, portable data acquisition, and precision regulators where stable low-power biasing is critical.
For engineers reviewing the LM4120AIM5X-2.0 datasheet, LM4120AIM5X-2.0 pinout, LM4120AIM5X-2.0 application, or LM4120AIM5X-2.0 equivalent, key selection factors include its enable-controlled power-down mode (<2 µA), ±5 mA source/sink capability, SOT-23-5 package compatibility, and industrial temperature range (−40°C to 85°C).
Technical Context
The LM4120AIM5X-2.0 implements a bandgap-based reference core with internal trimming for high initial accuracy and low thermal drift. Its enable input controls a shutdown mode that reduces supply current to <2 µA while maintaining fast wake-up response.
It operates from 2 V to 12 V input, supports ceramic output capacitors (0.022–0.047 µF), and features a dedicated REF pin requiring isolation to minimize noise sensitivity - all within a 5-pin SOT-23 footprint optimized for space-constrained portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V ±0.2% (A-grade initial accuracy ensures minimal calibration burden in precision ADC/DAC biasing) |
| Temperature Coefficient | 50 ppm/°C (ensured over −40°C to 125°C; enables stable operation across industrial ambient ranges) |
| Dropout Voltage | 120 mV typical at 1 mA (allows regulation from inputs as low as 2.168 V, critical for single-cell Li-ion or coin-cell systems) |
| Supply Current | 160 µA typical (enables multi-year battery life in always-on sensor nodes and portable meters) |
| Power-Down Current | <2 µA (achieved by pulling EN pin to GND; reduces standby power by >98% vs active mode) |
| Output Drive | ±5 mA (supports direct driving of ADC reference inputs, op-amp bias networks, or small DAC loads without buffering) |
| Line Regulation | 0.008 %/V (maintains output stability despite input rail variations common in unregulated battery or DC-DC outputs) |
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 PCB isolation and guard ring layout |
| 2 - GND | Ground reference | Return path for load current and internal circuitry; low-impedance connection essential for noise rejection |
| 3 - EN | Enable control input | Analog input requiring ≥2.4 V for logic high (normal operation); ≤0.4 V for logic low (shutdown mode) |
| 4 - VIN | Positive supply input | Accepts 2 V to 12 V; minimum headroom defined by dropout voltage - e.g., 2.168 V required for 1 mA load |
| 5 - VOUT | Stable reference output | 2.048 V regulated output capable of sourcing or sinking up to ±5 mA into external circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Enable-controlled shutdown | Reduces supply current to <2 µA - extends battery life in intermittent-sampling applications like IoT sensors |
| Low dropout voltage | 120 mV typical at 1 mA - enables use with ultra-low-input rails such as 2.2 V LiFePO₄ or boosted coin cells |
| High output accuracy | ±0.2% initial tolerance (A-grade) - eliminates need for system-level trimming in medical and test equipment |
| Source/sink capability | ±5 mA output drive - directly interfaces with SAR ADC references, op-amp gain-setting networks, and DAC bias inputs |
| Thermal hysteresis | 0.5 mV/V over −40°C to 125°C - ensures repeatable output after thermal cycling in automotive and industrial environments |
Applications
| Portable Instrumentation | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Handheld multimeters and portable oscilloscopes requiring stable, low-power reference for 16-bit ADCs. IC Role / Device Role / Timing Role: Precision voltage reference providing excitation and scaling for analog front-end signal chains. Use Value: 50 ppm/°C drift and ±0.2% accuracy maintain measurement integrity across operating temperature swings without recalibration. |
Use Scenario: Remote environmental sensors powered by CR2032 batteries logging temperature/humidity for months. IC Role / Device Role / Timing Role: Reference source for low-power microcontroller ADC and analog comparators during wake-up bursts. Use Value: 160 µA active current and <2 µA shutdown current maximize battery service life while preserving measurement fidelity. |
| Precision Regulators | Medical Diagnostic Devices |
Use Scenario: Low-noise LDO biasing circuits in lab-grade power supplies where output stability defines system specification. IC Role / Device Role / Timing Role: Master reference for error amplifiers in adjustable regulator feedback loops. Use Value: 36 µVPP (10 Hz–10 kHz) output noise and 0.008 %/V line regulation ensure clean, ripple-free output under varying input conditions. |
Use Scenario: Portable ECG and pulse oximetry units requiring FDA-grade accuracy in analog signal conditioning paths. IC Role / Device Role / Timing Role: Stable reference for analog-to-digital conversion of biopotential signals with sub-mV resolution. Use Value: Long-term stability of 100 ppm over 1000 hours ensures clinical-grade repeatability without field recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBVR | 2.048 V, ±0.2%, 50 ppm/°C, 50 µA supply current, no enable pin, SOT-23-5 | Lacks shutdown mode; lower quiescent current but no power-gating capability | Preferred when ultra-low active current dominates design priority and enable control is unnecessary |
| ADR3420ARJZ-R7 | 2.048 V, ±0.1%, 10 ppm/°C, 120 µA supply current, no enable pin, SOT-23-5 | Higher accuracy and lower drift, but no enable function and higher cost | Selected when long-term stability and thermal performance outweigh power-down requirements |
Compared with REF3020AIDBVR and ADR3420ARJZ-R7, the LM4120AIM5X-2.0 uniquely balances enable-controlled ultra-low standby power (<2 µA), moderate accuracy (±0.2%), and industrial temperature support - making it optimal for battery-cycled instrumentation where both precision and energy efficiency are co-constrained.
Availability
LM4120AIM5X-2.0 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and precision regulators requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4120AIM5X-2.0 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 low-power, high-accuracy voltage referencing in portable, battery-operated, and industrial measurement systems - emphasizing micropower operation, enable control, and robust thermal performance.
FAQ
What is the output voltage tolerance of the LM4120AIM5X-2.0 over temperature?
The LM4120AIM5X-2.0 guarantees ±0.2% initial accuracy at 25°C and a temperature coefficient of 50 ppm/°C over −40°C to 125°C. Total output variation across the industrial temperature range (−40°C to 85°C) remains within ±0.35% due to combined initial error and thermal drift - verified per TI's Electrical Characteristics table and ensured via Statistical Quality Control methods.
Does the LM4120AIM5X-2.0 require an external output capacitor, and what value is recommended?
Yes, the LM4120AIM5X-2.0 requires a minimum 0.022 µF ceramic output capacitor for loop stability. TI recommends 0.022 µF to 0.047 µF ceramic capacitors with ESR between 0.1 Ω and 0.5 Ω. Larger values (up to 1 µF) are permissible only with tantalum types and require a 50-pF capacitor between VOUT and REF - as specified in the LM4120AIM5X-2.0 datasheet Section 8.1.
How does the enable pin function on the LM4120AIM5X-2.0, and what are its voltage thresholds?
The LM4120AIM5X-2.0 enable pin (Pin 3) is an analog input: logic high (≥2.4 V) enables normal operation; logic low (≤0.4 V) forces shutdown with supply current dropping below 2 µA. Input current is typically 6 µA during turn-on. Floating the pin is not allowed - if unused, connect directly to VIN per TI's Application Information guidance.
Can the LM4120AIM5X-2.0 sink current, and how much is supported?
Yes, the LM4120AIM5X-2.0 supports bidirectional output current: it can source or sink up to ±5 mA. Sink capability is explicitly confirmed in the Features list and Electrical Characteristics table, enabling use in active bias networks, current-mode DAC interfaces, and precision current sources - unlike many references limited to sourcing only.
What is the maximum input voltage rating for the LM4120AIM5X-2.0, and what happens above that limit?
The absolute maximum input voltage for the LM4120AIM5X-2.0 is 14 V, as stated in Section 6.1 Absolute Maximum Ratings. Operation above this level risks permanent damage. The recommended operating range is 2 V to 12 V - exceeding 12 V may degrade long-term reliability even if below 14 V, and is not characterized or guaranteed by TI.
LM4120AIM5X-2.0 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):
- 2.048V
- 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-2.0 FAQ
1.How can I place an order for LM4120AIM5X-2.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4120AIM5X-2.0 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-2.0 reliable?
The price and inventory of LM4120AIM5X-2.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4120AIM5X-2.0 is usually 5 days.
3.What payment methods are accepted for LM4120AIM5X-2.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4120AIM5X-2.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4120AIM5X-2.0?
LM4120AIM5X-2.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4120AIM5X-2.0 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-2.0?
For technical support, including LM4120AIM5X-2.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4120AIM5X-2.0 requirements.
6.How does Aetrix verify that LM4120AIM5X-2.0 is sourced from the original manufacturer or authorized distributors?
All LM4120AIM5X-2.0 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-2.0 meets industry standards.
7.What is the process for return or replacement of LM4120AIM5X-2.0?
All LM4120AIM5X-2.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4120AIM5X-2.0, 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-2.0 part is unused and in its original packaging.
Return procedure for LM4120AIM5X-2.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4120AIM5X-2.0 Tags
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