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Texas Instruments LM4120IM5-3.0/NOPB
- Part No.:
- LM4120IM5-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4120IM5-3.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,789
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Product details
Overview
LM4120IM5-3.0/NOPB from Texas Instruments is a precision micropower low-dropout bandgap voltage reference delivering 3.0 V output with ±0.5% initial accuracy, 50 ppm/°C temperature coefficient, and 120 mV typical dropout at 1 mA load - used as a stable reference in portable instrumentation, battery-powered data acquisition, and industrial sensor signal conditioning circuits.
For engineers reviewing the LM4120IM5-3.0/NOPB datasheet, LM4120IM5-3.0/NOPB pinout, LM4120IM5-3.0/NOPB application, or LM4120IM5-3.0/NOPB equivalent, key selection criteria include enable-controlled power-down (≤2 µA), ±5 mA source/sink capability, SOT-23-5 package compatibility, and operation down to 2 V input across −40°C to 85°C.
Technical Context
The LM4120IM5-3.0/NOPB implements a bandgap-based reference core with integrated enable control and low-quiescent-current biasing. Its architecture supports both sourcing and sinking up to ±5 mA while maintaining output stability over line (2 V to 12 V VIN), load (0–5 mA), and temperature (−40°C to 85°C) variations.
Power-down mode is activated by pulling the ENABLE pin to GND, reducing supply current to ≤2 µA. The REF pin is internally connected and must remain unconnected externally; it is highly sensitive to noise and capacitive loading, requiring careful PCB isolation per TI layout guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal, ±0.5% initial accuracy (Standard grade) - ensures stable ADC/DAC reference without calibration in cost-sensitive industrial designs. |
| Temperature Coefficient | 50 ppm/°C (−40°C to 125°C) - guarantees ≤1.5 mV drift over full industrial range, critical for precision sensor front-ends. |
| Dropout Voltage | 120 mV typical at 1 mA - enables operation from single-cell Li-ion (3.0 V min) or 3.3 V rails with margin. |
| Supply Current | 160 µA typical - supports multi-year battery life in always-on portable equipment. |
| Enable Thresholds | VIL ≤ 0.4 V, VIH ≥ 2.4 V - compatible with standard CMOS/TTL logic without level-shifting. |
| Output Drive | ±5 mA source/sink - directly drives op-amp inputs, SAR ADC references, or small MOSFET gates without buffering. |
| Power-Down Current | ≤2 µA - reduces system standby power in sleep-mode applications like wireless sensors. |
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 | Internally connected; must remain unconnected externally to avoid noise coupling and output instability. |
| 2 - GND | Ground reference | Return path for load current and internal bias; requires low-impedance connection to minimize ground bounce. |
| 3 - ENABLE | Digital control input | Analog input with hysteresis; tie to VIN for always-on operation or drive to GND for shutdown (≤2 µA IQ). |
| 4 - VIN | Positive supply input | Accepts 2 V to 12 V; minimum headroom = VOUT + dropout (120 mV @ 1 mA) for regulation. |
| 5 - VOUT | Reference output | 3.0 V precision output capable of sourcing/sinking ±5 mA; requires 0.022–0.047 µF ceramic capacitor for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout | 120 mV typical at 1 mA - enables use with low-voltage batteries and post-regulator references where headroom is constrained. |
| Enable Control | Logic-compatible shutdown (≤2 µA IQ) - allows dynamic power gating in energy-harvesting and duty-cycled systems. |
| Bipolar Output Drive | ±5 mA sink/source - eliminates need for external buffer in driving ADC reference inputs or comparator thresholds. |
| Thermal Hysteresis | 0.5 mV/V max - minimizes repeatability error after thermal cycling in field-deployed instrumentation. |
| Long-Term Stability | 100 ppm over 1000 hours - reduces calibration frequency in medical and test equipment requiring sustained accuracy. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure over months on coin-cell or Li-SOCl₂ batteries. IC Role / Device Role / Timing Role: Primary voltage reference for 16-bit SAR ADCs and low-power microcontroller analog peripherals. Use Value: 160 µA quiescent current and enable-controlled shutdown extend battery life beyond 5 years; 50 ppm/°C TC ensures <±3 LSB drift over operating range. |
Use Scenario: 4–20 mA loop-powered transmitters converting RTD or strain-gauge signals in factory automation. IC Role / Device Role / Timing Role: Stable excitation reference for bridge sensors and precision gain-setting in analog signal chains. Use Value: ±5 mA drive capability powers Wheatstone bridge directly; low dropout allows operation from minimal loop voltage headroom (≤3.2 V). |
| Medical Patient Monitors | Test & Measurement Front-Ends |
Use Scenario: Portable ECG and pulse oximetry units requiring clinical-grade accuracy under varying ambient temperatures. IC Role / Device Role / Timing Role: Reference for high-resolution delta-sigma ADCs digitizing biopotential signals. Use Value: 36 µVPP (10 Hz–10 kHz) noise and 0.5% initial accuracy meet IEC 60601-2-27 immunity requirements without trimming. |
Use Scenario: Benchtop multimeters and automated test equipment needing stable, low-drift references for calibration traceability. IC Role / Device Role / Timing Role: Secondary reference in self-calibrating architectures, backed by higher-grade master references. Use Value: 100 ppm long-term stability reduces recalibration intervals; SOT-23-5 footprint simplifies board-level replacement during service. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4120AIM5-3.0/NOPB | 0.2% initial accuracy (vs. 0.5%), same package and pinout | Required for sub-1-LSB error in 12-bit+ systems without calibration | Select when absolute accuracy outweighs cost sensitivity; identical layout and enable behavior. |
| REF3030AIDBVR | 3.0 V, 0.2% accuracy, 50 ppm/°C, but no enable pin and 55 µA IQ | Lacks power-down; suited for always-on, ultra-low-noise applications only | Choose if enable functionality is unnecessary and lower noise (25 µVPP) is prioritized over dynamic power control. |
Compared with LM4120IM5-3.0/NOPB, the A-grade variant improves initial accuracy without changing layout or control logic, while REF3030AIDBVR trades enable capability for lower noise and quiescent current - making each alternative optimal only under distinct system-level constraints.
Availability
LM4120IM5-3.0/NOPB 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/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 headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and digital signal solutions for industrial, automotive, and consumer markets.
The LM4120 series was developed as a precision micropower voltage reference family targeting battery-operated and space-constrained applications where low dropout, enable control, and robust temperature stability are essential.
FAQ
What is the maximum input voltage for LM4120IM5-3.0/NOPB?
The absolute maximum input voltage for LM4120IM5-3.0/NOPB is 14 V, but the recommended operating range is 2 V to 12 V. Operation above 12 V risks exceeding safe power dissipation limits, especially at elevated ambient temperatures, and may degrade long-term reliability. For continuous operation, VIN should remain ≤12 V with adequate thermal derating per the RθJA = 170.4°C/W specification.
Does LM4120IM5-3.0/NOPB require an output capacitor, and what value is recommended?
Yes, LM4120IM5-3.0/NOPB requires a minimum 0.022 µF ceramic output capacitor for stability, with optimal values between 0.022 µF and 0.047 µF. Larger values (up to 1 µF) are permissible using tantalum capacitors but necessitate a 50-pF capacitor between VOUT and REF pins. Ceramic capacitors outside the 0.022–0.047 µF range may cause oscillation or degraded transient response.
Can LM4120IM5-3.0/NOPB sink current, and how much?
Yes, LM4120IM5-3.0/NOPB can both source and sink up to ±5 mA. It sinks current into the VOUT pin when the load draws current from ground toward the reference node - enabling bidirectional operation in active filter references, precision current sources, and rail-to-rail comparator interfaces. This bipolar capability eliminates external sinking transistors in many analog designs.
What is the function of the REF pin on LM4120IM5-3.0/NOPB, and how should it be handled?
The REF pin on LM4120IM5-3.0/NOPB is an internal reference node that must remain unconnected in all applications. It is highly sensitive to noise and capacitive loading; routing traces near or connecting components to this pin causes output instability and increased drift. TI's layout guidelines mandate physical isolation - including U-slot mechanical relief - to prevent PCB stress and noise coupling from affecting LM4120IM5-3.0/NOPB performance.
Is LM4120IM5-3.0/NOPB suitable for automotive applications?
LM4120IM5-3.0/NOPB is specified for the industrial temperature range (−40°C to +85°C) and is not qualified to AEC-Q200 or automotive-grade reliability standards. While it operates within common automotive cabin temperature limits, TI does not guarantee performance or lifetime under automotive qualification stress tests. For automotive use, consider purpose-qualified alternatives such as TLV431A-Q1 or REF5030-EP with extended temperature and qualification support.
LM4120IM5-3.0/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):
- 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/NOPB FAQ
1.How can I place an order for LM4120IM5-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4120IM5-3.0/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 LM4120IM5-3.0/NOPB reliable?
The price and inventory of LM4120IM5-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4120IM5-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4120IM5-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4120IM5-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4120IM5-3.0/NOPB?
LM4120IM5-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4120IM5-3.0/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 LM4120IM5-3.0/NOPB?
For technical support, including LM4120IM5-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4120IM5-3.0/NOPB requirements.
6.How does Aetrix verify that LM4120IM5-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4120IM5-3.0/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 LM4120IM5-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4120IM5-3.0/NOPB?
All LM4120IM5-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4120IM5-3.0/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 LM4120IM5-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4120IM5-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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