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Texas Instruments LM4120IM5-3.0
- Part No.:
- LM4120IM5-3.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4120IM5-3.0.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:557
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Product details
Overview
LM4120IM5-3.0 from Texas Instruments is a precision micropower low-dropout bandgap voltage reference delivering 3.0 V ±0.5% initial accuracy, 50 ppm/°C temperature coefficient, and 120 mV typical dropout at 1 mA load - enabling stable biasing in battery-powered instrumentation, portable data acquisition, and industrial sensor signal chains.
For engineers reviewing the LM4120IM5-3.0 datasheet, LM4120IM5-3.0 pinout, LM4120IM5-3.0 application, or LM4120IM5-3.0 equivalent, this page provides verified electrical specs, SOT-23-5 terminal mapping, real-world use cases, and validated alternative options for low-power precision reference design.
Technical Context
The LM4120IM5-3.0 implements a bandgap-based reference core with integrated enable control and ±5 mA source/sink capability. Its architecture supports operation from 2 V to 12 V input while maintaining regulation down to VIN − VOUT = 120 mV (typ) at 1 mA - critical for ultra-low-voltage systems.
It features a dedicated REF pin (unconnected), GND-referenced output, and analog-enable logic requiring ≤0.4 V for shutdown and ≥2.4 V for activation. Power-down current drops below 2 µA, and output noise is 36 µVPP (10 Hz–10 kHz) - optimized for high-resolution ADCs and precision DACs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V ±0.5% (standard grade, 25°C); enables accurate 3.0 V system bias without trimming |
| Temperature Coefficient | 50 ppm/°C (−40°C to 125°C); ensures ≤1.5 mV drift over full industrial range |
| Dropout Voltage | 120 mV typical at 1 mA; allows operation with VIN as low as 3.12 V while regulating 3.0 V |
| Supply Current | 160 µA typical; extends battery life in always-on sensor nodes and portable meters |
| Enable Threshold | VL ≤ 0.4 V, VH ≥ 2.4 V; compatible with standard CMOS/TTL logic for controlled power sequencing |
| Output Drive | ±5 mA source/sink; directly drives ADC reference inputs, op-amp bias networks, or small DAC loads |
| Output Noise | 36 µVPP (10 Hz–10 kHz); supports 16-bit+ resolution without external filtering |
Pinout & Package
SOT-23-5 (DBV) package, 1.60 mm × 2.90 mm body size, RoHS-compliant, tape-and-reel packaging (1000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF | Reference node | Must remain unconnected; sensitive to noise and capacitive loading - isolate during PCB layout |
| 2 - GND | Ground return | Primary current return path; connects to system ground plane with low-inductance trace |
| 3 - EN | Enable control | Analog input: pull ≥2.4 V to enable, ≤0.4 V to disable; draws ≤15 µA in active state |
| 4 - VIN | Input supply | Accepts 2 V to 12 V; requires local 0.1 µF ceramic bypass capacitor for stability |
| 5 - VOUT | Regulated output | 3.0 V reference output; capable of sourcing/sinking up to ±5 mA with <0.1% load regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Operation | 120 mV typical at 1 mA enables use with single-cell Li-ion (3.0–4.2 V) or two-cell alkaline supplies |
| Enable-Controlled Power-Down | Reduces supply current to <2 µA - ideal for duty-cycled sensors and wake-on-event architectures |
| High Output Accuracy | ±0.5% initial tolerance eliminates need for post-manufacturing calibration in cost-sensitive designs |
| Stable with Ceramic Capacitors | Works with 0.022–0.047 µF ceramic output caps - avoids tantalum and simplifies BOM |
| Industrial Temperature Range | Specified from −40°C to +85°C - qualified for deployment in outdoor instrumentation and factory-floor equipment |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
|
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and pressure at 10-second intervals. IC Role / Device Role / Timing Role: Provides stable 3.0 V reference for 16-bit SAR ADC and microcontroller VREF input. Use Value: 50 ppm/°C drift and 36 µVPP noise ensure <±0.01% measurement accuracy across −25°C to +70°C operating range. |
Use Scenario: 4–20 mA loop-powered pressure transmitter in oil & gas pipeline monitoring. IC Role / Device Role / Timing Role: Supplies precise 3.0 V bias to bridge-sensor amplifier and DAC feedback network. Use Value: ±5 mA drive capability and 120 mV dropout allow direct regulation from loop-derived 3.3 V rail with minimal headroom loss. |
| Medical Patient Monitors | Test & Measurement Front-Ends |
|
Use Scenario: Portable ECG device acquiring biopotential signals with 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Low-noise 3.0 V reference for ADC reference input and analog front-end gain-setting resistors. Use Value: 36 µVPP broadband noise prevents degradation of effective resolution beyond 18 bits. |
Use Scenario: Benchtop multimeter using auto-ranging and dual-slope integration. IC Role / Device Role / Timing Role: Primary voltage reference for internal calibration and DMM reference ladder. Use Value: ±0.5% initial accuracy and 100 ppm long-term stability (1000 hrs) support annual recalibration intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C30IDBZR | Shunt reference; requires external bias resistor; 0.5% accuracy; 100 ppm/°C; no enable pin | Used where space permits series resistor + shunt topology; unsuitable for low-IQ or enable-controlled systems | Select when board area allows resistor placement and enable functionality is unnecessary |
| MAX6025AEUR+T | Series reference; 0.2% accuracy; 20 ppm/°C; 65 µA supply current; SOT-23-5 pinout | Better TC and lower IQ, but higher cost; fixed 3.0 V output; no enable function | Choose for higher-accuracy, lower-drift applications where power-down control is not required |
Compared with LM4120IM5-3.0, LM4040C30IDBZR demands external current-setting circuitry and lacks enable control, while MAX6025AEUR+T offers superior drift performance but forfeits programmable power management - making LM4120IM5-3.0 optimal for battery-constrained, enable-driven systems needing balanced accuracy and ultra-low IQ.
Availability
LM4120IM5-3.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical patient monitors requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4120IM5-3.0 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 specializing in analog and embedded processing technologies, with decades of expertise in precision reference design and low-power signal conditioning.
The LM4120 product line delivers micropower, low-dropout voltage references for battery-operated and space-constrained applications - engineered for accuracy, stability, and ease of integration in portable and industrial systems.
FAQ
What is the output voltage tolerance of the LM4120IM5-3.0 at 25°C?
The LM4120IM5-3.0 has a standard-grade initial accuracy of ±0.5% at 25°C, meaning its output voltage falls within 2.985 V to 3.015 V under nominal conditions. This tolerance is guaranteed across the industrial temperature range (−40°C to +85°C) per TI's datasheet specifications.
Does the LM4120IM5-3.0 require an external capacitor on the REF pin?
No - the REF pin of the LM4120IM5-3.0 must remain unconnected in all applications. TI explicitly states that capacitive loading or routing near this pin degrades performance; it is highly sensitive to noise and must be isolated on the PCB layout.
What is the minimum input voltage required for the LM4120IM5-3.0 to regulate 3.0 V at 1 mA load?
The LM4120IM5-3.0 requires a minimum input voltage of 3.12 V (3.0 V + 120 mV typical dropout) to maintain regulation at 1 mA load. At higher temperatures or loads up to 5 mA, dropout increases to 210 mV (max), so VIN ≥ 3.21 V is recommended for robust operation.
Can the LM4120IM5-3.0 drive a 10 kΩ load directly?
Yes - a 10 kΩ load draws only 0.3 mA (3.0 V / 10 kΩ), well within the LM4120IM5-3.0's ±5 mA output capability. Load regulation remains ≤0.08%/mA in this range, contributing less than 0.024% error to the output voltage.
Is the LM4120IM5-3.0 RoHS compliant and lead-free?
Yes - the LM4120IM5-3.0/NOPB variant is RoHS compliant and lead-free, with "NOPB" denoting "No Lead (Pb) Finish." Its package uses Sn (tin) lead finish and meets EU RoHS Directive 2011/65/EU requirements for all 10 restricted substances.
LM4120IM5-3.0 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:
- ±0.5%
- 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
LM4120IM5-3.0 FAQ
1.How can I place an order for LM4120IM5-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4120IM5-3.0 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 LM4120IM5-3.0 reliable?
The price and inventory of LM4120IM5-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4120IM5-3.0 is usually 5 days.
3.What payment methods are accepted for LM4120IM5-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4120IM5-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4120IM5-3.0?
LM4120IM5-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4120IM5-3.0 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 LM4120IM5-3.0?
For technical support, including LM4120IM5-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4120IM5-3.0 requirements.
6.How does Aetrix verify that LM4120IM5-3.0 is sourced from the original manufacturer or authorized distributors?
All LM4120IM5-3.0 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 LM4120IM5-3.0 meets industry standards.
7.What is the process for return or replacement of LM4120IM5-3.0?
All LM4120IM5-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4120IM5-3.0, 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 LM4120IM5-3.0 part is unused and in its original packaging.
Return procedure for LM4120IM5-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4120IM5-3.0 Tags
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TL431AIDBZR
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TL431BQDBZR
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LM4040DIM3X-2.5/NOPB
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