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Texas Instruments LM4120AIM5X-3.0
- Part No.:
- LM4120AIM5X-3.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4120AIM5X-3.0.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,033
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Product details
Overview
LM4120AIM5X-3.0 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 operates from 2 V to 12 V input across −40°C to 85°C - ideal for battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the LM4120AIM5X-3.0 datasheet, LM4120AIM5X-3.0 pinout, LM4120AIM5X-3.0 application, or LM4120AIM5X-3.0 equivalent, this page delivers verified electrical specs, SOT-23-5 terminal mapping, real-world use cases, and two validated alternative parts - all grounded in TI's official SNVS049F production data sheet (Rev F, March 2016).
Technical Context
The LM4120AIM5X-3.0 implements a bandgap-based reference core with internal error amplifier and pass transistor, enabling stable 3.0 V output under varying line (2–12 V), load (±5 mA), and temperature (−40°C to 85°C) conditions. Its enable pin provides analog-controlled power-down mode, reducing supply current to <2 µA while maintaining fast wake-up response.
Designed for low-noise, low-drift operation, it achieves 36 µVPP (10 Hz–10 kHz) output noise and ensures thermal hysteresis ≤0.5 mV/V over −40°C to 125°C. The REF pin is internally connected and must remain unconnected externally to avoid noise coupling or capacitive loading effects.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal, ±0.2% initial accuracy (Grade A) - enables high-resolution ADC/DAC biasing without calibration. |
| Temperature Coefficient | 50 ppm/°C (−40°C to 125°C) - ensures ≤1.5 mV drift over full industrial range, critical for precision sensor front-ends. |
| Dropout Voltage | 120 mV typical at 1 mA - allows operation from 3.12 V input, supporting single-cell Li-ion or 3.3 V rail margin. |
| Supply Current | 160 µA typical (active), <2 µA in shutdown - extends battery life in always-on monitoring nodes. |
| Load Drive | ±5 mA source/sink - directly drives op-amp inputs, SAR ADC references, or small logic loads without buffering. |
| Enable Thresholds | VH = 2.4 V, VL = 0.4 V - compatible with standard CMOS/TTL logic for reliable on/off control. |
| Output Noise | 36 µVPP (10 Hz–10 kHz) - supports 16-bit+ data converters without added filtering overhead. |
Pinout & Package
SOT-23-5 (DBV) package, 1.60 mm × 2.90 mm body size, RoHS-compliant, tape-and-reel (3000 pcs/reel). Pin 1 marked with dot; device marking "R15A".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Reference node | Internally connected; must remain unconnected externally to prevent noise injection or instability. |
| 2 (GND) | Ground return | Primary ground path for reference core and output stage; requires low-impedance PCB connection. |
| 3 (EN) | Enable control | Analog input: ≥2.4 V enables output; ≤0.4 V disables output and reduces IQ to <2 µA. |
| 4 (VIN) | Input supply | Accepts 2 V to 12 V; minimum headroom = VOUT + dropout (120 mV @ 1 mA). |
| 5 (VOUT) | Regulated output | 3.0 V precision reference; capable of sourcing/sinking ±5 mA with <0.1% load regulation (0–1 mA). |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 120 mV typical at 1 mA - enables use with ultra-low-input rails like single Li-ion (3.0–3.7 V) or 3.3 V LDO outputs. |
| Enable-controlled shutdown | Reduces quiescent current to <2 µA - essential for duty-cycled sensors and energy-harvesting systems. |
| High output accuracy | ±0.2% initial tolerance (Grade A) - eliminates need for post-production trimming in medical and test equipment. |
| Wide input voltage range | 2 V to 12 V operation - simplifies power architecture across multi-rail systems without dedicated bias supplies. |
| Stable with ceramic capacitors | 0.022 µF–0.047 µF output cap - avoids costly tantalum or polymer caps; supports compact, low-ESR layouts. |
Applications
| Portable Instrumentation | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Handheld multimeter measuring DC voltage with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 3.0 V reference for ADC conversion, rejecting supply ripple and temperature drift. Use Value: Enables ±0.01% measurement accuracy over −10°C to 50°C ambient without recalibration. |
Use Scenario: Remote environmental sensor node logging temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Supplies precision bias to analog front-end and ADC during active sampling bursts. Use Value: 160 µA active current + <2 µA shutdown extends CR2032 battery life beyond 2 years. |
| Industrial Process Transmitters | Medical Vital Sign Monitors |
|
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART modulation. IC Role / Device Role / Timing Role: References DAC generating loop current; must remain stable under wide supply (8–36 V) and temp (−40°C to 85°C). Use Value: 50 ppm/°C TCVOUT and 0.2% initial accuracy ensure <0.1% full-scale error across operating range. |
Use Scenario: Portable ECG module requiring low-noise, drift-free analog signal conditioning. IC Role / Device Role / Timing Role: Sets gain and offset for instrumentation amplifiers and filters before digitization. Use Value: 36 µVPP (10 Hz–10 kHz) noise floor preserves microvolt-level biopotential signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6126AUT30+ | 3.0 V, ±0.06% initial accuracy, 3 ppm/°C TCVOUT, 0.9 µA quiescent current - higher precision but lower drive (±1 mA). | Used in ultra-high-accuracy metrology; not suitable for >1 mA loads or where ±5 mA sink is required. | Select when long-term stability (<10 ppm/1000 hrs) and sub-ppm drift outweigh drive capability needs. |
| ADR3430ARJZ-R7 | 3.0 V, ±0.1% initial accuracy, 10 ppm/°C TCVOUT, 120 µA IQ, no enable pin - lower noise (12 µVPP) but fixed operation. | Preferred in space-constrained, always-on systems where shutdown is unnecessary and noise is dominant. | Select when minimal quiescent current and ultra-low noise are critical, and enable functionality is not required. |
Compared with MAX6126AUT30+ and ADR3430ARJZ-R7, the LM4120AIM5X-3.0 uniquely balances moderate accuracy (±0.2%), robust ±5 mA drive, integrated enable, and micropower shutdown - making it optimal for cost-sensitive, battery-operated instrumentation where flexibility and load capability matter more than ultra-fine drift specs.
Availability
LM4120AIM5X-3.0 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and industrial process transmitters requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4120AIM5X-3.0 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 leader focused on analog and embedded processing technologies, serving industrial, automotive, and communications markets with high-reliability components.
The LM4120 series was designed specifically for precision, low-power voltage referencing in space- and energy-constrained applications - emphasizing micropower operation, low dropout, and enable-controlled shutdown without sacrificing accuracy or thermal stability.
FAQ
What is the maximum input voltage for LM4120AIM5X-3.0?
The absolute maximum input voltage for LM4120AIM5X-3.0 is 14 V, but the recommended operating range is 2 V to 12 V. Operating above 12 V risks exceeding safe power dissipation limits, especially at elevated temperatures. For reliable long-term performance in industrial designs, TI specifies 12 V as the upper limit in Recommended Operating Conditions (Section 6.3 of SNVS049F).
Does LM4120AIM5X-3.0 require an external output capacitor?
Yes - LM4120AIM5X-3.0 requires a minimum 0.022 µF ceramic output capacitor for stability, with optimal range 0.022 µF to 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 caps outside the 0.022–0.047 µF range may cause oscillation or degraded transient response.
What does the "R15A" marking on LM4120AIM5X-3.0 indicate?
The "R15A" top-side marking on LM4120AIM5X-3.0 identifies it as the 3.0 V variant in Grade A accuracy (±0.2%) within the SOT-23-5 (DBV) package. This marking is defined in TI's Orderable Addendum (Page 1, SNVS049F Rev F) and distinguishes it from other voltages (e.g., R16A = 3.3 V) and grades (e.g., R15B = standard grade, ±0.5%).
Can LM4120AIM5X-3.0 sink current, and how much?
Yes - LM4120AIM5X-3.0 can both source and sink up to ±5 mA, confirmed in the Features section and Electrical Characteristics table (Section 6.5). At −1 mA load, load regulation is 0.04%/mA; at −5 mA, it remains within 0.1%/mA over −40°C to 85°C. This bidirectional capability supports active pull-down in comparator interfaces or DAC buffer circuits.
Is the REF pin on LM4120AIM5X-3.0 connected internally?
Yes - the REF pin (Pin 1) is internally connected to the reference node and must remain unconnected externally. TI explicitly states in Section 7.3.2 and Pin Functions (Section 5) that connecting or capacitively loading REF introduces noise sensitivity and potential instability. PCB layout must isolate this pin with guard traces and avoid routing nearby signals.
LM4120AIM5X-3.0 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):
- 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 FAQ
1.How can I place an order for LM4120AIM5X-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4120AIM5X-3.0 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-3.0 reliable?
The price and inventory of LM4120AIM5X-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4120AIM5X-3.0 is usually 5 days.
3.What payment methods are accepted for LM4120AIM5X-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4120AIM5X-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4120AIM5X-3.0?
LM4120AIM5X-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4120AIM5X-3.0 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-3.0?
For technical support, including LM4120AIM5X-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4120AIM5X-3.0 requirements.
6.How does Aetrix verify that LM4120AIM5X-3.0 is sourced from the original manufacturer or authorized distributors?
All LM4120AIM5X-3.0 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-3.0 meets industry standards.
7.What is the process for return or replacement of LM4120AIM5X-3.0?
All LM4120AIM5X-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4120AIM5X-3.0, 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-3.0 part is unused and in its original packaging.
Return procedure for LM4120AIM5X-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4120AIM5X-3.0 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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