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Texas Instruments LM4120IM5X-3.0/NOPB
- Part No.:
- LM4120IM5X-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4120IM5X-3.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,059
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Product details
Overview
LM4120IM5X-3.0/NOPB 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. It features enable control, ±5 mA source/sink capability, and 160 μA typical supply current - optimized for battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the LM4120IM5X-3.0/NOPB datasheet, LM4120IM5X-3.0/NOPB pinout, LM4120IM5X-3.0/NOPB application, or LM4120IM5X-3.0/NOPB equivalent, key selection criteria include output accuracy over −40°C to 85°C, power-down current <2 μA, SOT-23-5 package compatibility, and stability with 0.022–0.047 µF ceramic output capacitors.
Technical Context
The LM4120IM5X-3.0/NOPB implements a bandgap-based reference core with integrated enable logic and low-impedance output buffer. Its architecture supports operation from VIN = 3.3 V (VOUT + 1 V) up to 12 V while maintaining regulation down to 120 mV headroom at 1 mA.
It operates in two functional modes: normal operation (EN = VIN) and shutdown (EN = GND), drawing <2 μA quiescent current in the latter. The REF pin is internally connected and must remain unconnected externally to avoid noise coupling and capacitive loading effects.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V ±0.5% initial accuracy at 25°C - ensures stable reference for 12-bit ADCs and precision regulators without calibration. |
| Temperature Coefficient | 50 ppm/°C (−40°C to 125°C) - guarantees ≤1.5 mV drift over full industrial range, critical for sensor signal chains. |
| Dropout Voltage | 120 mV typical at 1 mA - enables operation from 3.12 V input, supporting single-cell Li-ion or dual-cell alkaline supplies. |
| Supply Current | 160 μA typical - extends battery life in portable equipment; drops to <2 μA in power-down mode via EN pin. |
| Load Drive | ±5 mA source/sink - directly drives ADC reference inputs, op-amp bias networks, or small DACs without external buffers. |
| Output Noise | 36 µVPP (10 Hz–10 kHz) - low enough for 16-bit SAR ADCs without additional filtering. |
| Enable Threshold | VL = 0.4 V max, VH = 2.4 V min - compatible with standard CMOS/TTL logic for reliable on/off control. |
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 | Internally connected; must be left unconnected - floating connection prevents noise injection and capacitive loading that degrades accuracy. |
| 2 - GND | Ground reference | Primary return path for load and supply currents; requires low-impedance PCB connection to minimize ground bounce errors. |
| 3 - EN | Enable control input | Analog input requiring ≥6 µA pull-up to VIN for startup; pulled to GND to enter <2 μA shutdown mode - no external pull-up needed if tied to VIN. |
| 4 - VIN | Positive supply input | Accepts 3.3 V (VOUT + 1 V) to 12 V; minimum 3.12 V input required for 3.0 V output at 1 mA due to 120 mV dropout. |
| 5 - VOUT | Regulated reference output | 3.0 V precision output capable of sourcing/sinking ±5 mA; requires 0.022–0.047 µF ceramic capacitor for stability per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Operation | 120 mV typical at 1 mA - enables use in ultra-low-voltage systems where input margin is constrained. |
| Enable-Controlled Power-Down | <2 μA shutdown current - reduces system standby power by >99% versus active mode (160 μA). |
| High Output Accuracy | ±0.5% initial tolerance - eliminates need for post-manufacture trimming in cost-sensitive industrial sensors. |
| Wide Input Voltage Range | 3.3 V to 12 V - supports direct connection to unregulated rails, battery stacks, or switching regulator outputs. |
| Stable with Small Ceramic Capacitors | 0.022 µF minimum COUT - avoids polarized tantalum parts, reducing BOM count and board area. |
Applications
| Portable Instrumentation | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Handheld multimeter measuring DC voltage with 16-bit resolution. IC Role / Device Role / Timing Role: Provides stable 3.0 V reference for SAR ADC and analog front-end gain stages. Use Value: 50 ppm/°C drift and 36 µVPP noise ensure <±0.01% measurement accuracy across −10°C to 50°C ambient. |
Use Scenario: Remote environmental sensor node powered by two AA batteries. IC Role / Device Role / Timing Role: Supplies precision reference to microcontroller ADC and temperature sensor interface. Use Value: 160 μA supply current and <2 μA shutdown extend battery life to >2 years in sleep-wake cycles. |
| Industrial Process Transmitters | Medical Vital Sign Monitors |
|
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART communication. IC Role / Device Role / Timing Role: Generates accurate 3.0 V rail for signal conditioning and DAC output stage. Use Value: ±5 mA drive capability supports direct interfacing to op-amps and current-sense amplifiers without buffering. |
Use Scenario: Portable ECG device requiring low-noise analog signal chain. IC Role / Device Role / Timing Role: Reference source for high-resolution ADC sampling patient biopotentials. Use Value: Low 10 Hz–10 kHz noise floor preserves signal integrity in sub-mV cardiac waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C30IDBZR | Shunt reference (2-terminal), 3.0 V ±0.5%, 100 ppm/°C, 60 µA typical IQ, no enable pin. | Requires external current-setting resistor; unsuitable for low-input-voltage or enable-controlled systems. | Select when board space is extremely limited and supply current >60 µA is acceptable; not drop-in for LM4120IM5X-3.0/NOPB. |
| REF3030AIDBZR | Series reference, 3.0 V ±0.2%, 50 ppm/°C, 50 µA IQ, no enable, SOT-23-5. | Higher initial accuracy but lacks power-down mode; lower supply current but no EN control. | Choose for higher-accuracy applications without shutdown requirement; pin-compatible but functionally distinct due to missing EN functionality. |
Compared with LM4120IM5X-3.0/NOPB, LM4040C30IDBZR requires external biasing and offers no enable control, while REF3030AIDBZR provides tighter initial accuracy but sacrifices programmable power management - making LM4120IM5X-3.0/NOPB uniquely suited for battery-constrained systems needing both precision and dynamic power control.
Availability
LM4120IM5X-3.0/NOPB 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 availability.
Supply support for LM4120IM5X-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 specializing in analog and embedded processing technologies, with decades of leadership in precision analog ICs and voltage references.
The LM4120 series was designed for micropower, low-dropout precision reference applications in portable, battery-operated, and industrial systems where accuracy, stability, and power efficiency are critical.
FAQ
What is the operating temperature range for LM4120IM5X-3.0/NOPB?
The LM4120IM5X-3.0/NOPB is specified for operation from −40°C to +85°C (industrial temperature range). While its temperature coefficient of 50 ppm/°C is ensured from −40°C to +125°C, full electrical specifications including initial accuracy and load regulation are guaranteed only within the −40°C to +85°C range per the official TI datasheet SNVS049F.
Does LM4120IM5X-3.0/NOPB require an external output capacitor?
Yes, LM4120IM5X-3.0/NOPB requires a minimum 0.022 µF ceramic output capacitor for stability, with recommended values between 0.022 µF and 0.047 µF. Larger capacitors (up to 1 µF) may be used for improved transient response but require tantalum construction above 0.047 µF and additional layout precautions per TI's Application Note.
Can the REF pin of LM4120IM5X-3.0/NOPB be connected to ground or bypassed?
No - the REF pin of LM4120IM5X-3.0/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 drift, and potentially cause instability per TI's Pin Functions documentation.
What is the maximum load current LM4120IM5X-3.0/NOPB can source or sink?
The LM4120IM5X-3.0/NOPB is rated for ±5 mA source/sink current. At 5 mA load, dropout voltage increases to 180–210 mV (typical/max), and output voltage error remains within specification. Exceeding ±5 mA may cause output regulation loss or thermal stress beyond safe operating limits.
Is LM4120IM5X-3.0/NOPB pin-compatible with other LM4120 variants?
Yes - all LM4120 variants in the SOT-23-5 (DBV) package, including LM4120IM5X-2.5/NOPB and LM4120IM5X-3.3/NOPB, share identical pinout and footprint. The only differences are output voltage and device marking (R15B for LM4120IM5X-3.0/NOPB); no PCB redesign is needed when substituting within the same grade and package.
LM4120IM5X-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
LM4120IM5X-3.0/NOPB FAQ
1.How can I place an order for LM4120IM5X-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4120IM5X-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 LM4120IM5X-3.0/NOPB reliable?
The price and inventory of LM4120IM5X-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 LM4120IM5X-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4120IM5X-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4120IM5X-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4120IM5X-3.0/NOPB?
LM4120IM5X-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4120IM5X-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 LM4120IM5X-3.0/NOPB?
For technical support, including LM4120IM5X-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4120IM5X-3.0/NOPB requirements.
6.How does Aetrix verify that LM4120IM5X-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4120IM5X-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 LM4120IM5X-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4120IM5X-3.0/NOPB?
All LM4120IM5X-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4120IM5X-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 LM4120IM5X-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4120IM5X-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4120IM5X-3.0/NOPB Tags
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