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Texas Instruments LM4120AIM5X-5.0
- Part No.:
- LM4120AIM5X-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4120AIM5X-5.0.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,584
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Product details
Overview
LM4120AIM5X-5.0 from Texas Instruments is a precision micropower low-dropout bandgap voltage reference delivering 5.0 V ±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 160 μA typical supply current - enabling high-accuracy analog sensing and ADC reference in space-constrained battery-powered instrumentation.
For engineers reviewing the LM4120AIM5X-5.0 datasheet, LM4120AIM5X-5.0 pinout, LM4120AIM5X-5.0 application, or LM4120AIM5X-5.0 equivalent, key selection criteria include industrial-grade temperature stability (−40°C to 85°C), SOT-23-5 package compatibility, power-down current <2 μA, and fixed 5.0 V output with no external trimming required.
Technical Context
The LM4120AIM5X-5.0 implements a bandgap-based reference core with integrated enable logic and low-impedance output buffer. Its architecture supports operation from VIN = VOUT + 120 mV up to 12 V, maintaining regulation across −40°C to 85°C ambient while ensuring 50 ppm/°C max drift over −40°C to 125°C junction range.
It uses an analog enable input requiring ~6 µA turn-on current and defined logic thresholds (VH = 2.4 V, VL = 0.4 V) to enter normal operation or shutdown mode. The REF pin is internally connected and must remain unconnected externally to avoid noise coupling and output instability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±0.2% (A-grade initial accuracy ensures ≤10 mV absolute error at 25°C for precision ADC/DAC biasing) |
| Temperature Coefficient | 50 ppm/°C (ensured from −40°C to 125°C; contributes ≤2.5 mV drift over full industrial range) |
| Dropout Voltage | 120 mV typical at 1 mA (enables stable 5.0 V output from as low as 5.12 V input, critical for single-cell Li-ion systems) |
| Supply Current | 160 μA typical (supports >1-year battery life in 10-μA average-power IoT sensor nodes) |
| Enable Thresholds | VH = 2.4 V, VL = 0.4 V (compatible with standard CMOS/TTL logic without level-shifting) |
| Output Drive | ±5 mA (sufficient to directly drive SAR ADC reference inputs and small op-amp bias networks) |
| Power-Down Current | 1 μA at EN = 0.2 V (reduces system standby power by >99% vs active mode) |
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 remain unconnected externally to prevent noise injection and output instability |
| 2 - GND | Ground return | Primary current return path for load, supply, and enable; requires low-impedance PCB connection |
| 3 - EN | Enable control input | Analog input with 6 µA typical turn-on current; pulled to VIN for always-on operation or driven to GND for shutdown |
| 4 - VIN | Positive supply input | Accepts 2 V to 12 V; minimum headroom = VOUT + 120 mV at 1 mA for regulation |
| 5 - VOUT | Regulated reference output | 5.0 V ±0.2% source/sink node; stable with 0.022–0.047 µF ceramic capacitor (ESR 0.1–0.5 Ω) |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Operation | 120 mV typical at 1 mA enables use with ultra-low-input-voltage rails such as partially discharged Li-ion cells |
| Enable-Controlled Power-Down | Reduces quiescent current to 1 μA, supporting duty-cycled measurement systems without external switches |
| A-Grade Precision | ±0.2% initial accuracy eliminates need for post-assembly calibration in portable test equipment and medical sensors |
| Wide Input Range | Operates from 2 V to 12 V, simplifying supply design across multi-rail systems and legacy 5 V/12 V platforms |
| Industrial Temperature Range | Specified performance from −40°C to 85°C ambient ensures reliability in automotive cabin electronics and factory-floor instruments |
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: Primary 5.0 V reference for ADC conversion and analog front-end biasing. Use Value: ±0.2% initial accuracy and 50 ppm/°C TC ensure <0.05% total measurement error across operating temperature without recalibration. |
Use Scenario: Remote environmental sensor node logging temperature/humidity every 10 seconds. IC Role / Device Role / Timing Role: Stable 5.0 V reference for precision sensor excitation and ADC reference during active sampling bursts. Use Value: 160 μA active current and 1 μA shutdown current extend CR2032 battery life beyond 2 years in low-duty-cycle operation. |
| Automotive Cabin Electronics | Industrial Process Transmitters |
Use Scenario: HVAC control module monitoring cabin temperature and humidity with analog sensors. IC Role / Device Role / Timing Role: Reference voltage for sensor signal conditioning and microcontroller ADC subsystem. Use Value: −40°C to 85°C guaranteed operation and 50 ppm/°C TC maintain <±2 LSB error in 12-bit conversions across vehicle thermal cycles. |
Use Scenario: 4–20 mA loop-powered pressure transmitter with local display and diagnostics. IC Role / Device Role / Timing Role: Precision 5.0 V reference for DAC output scaling and sensor bridge excitation. Use Value: ±5 mA output drive supports direct interface to op-amps and DACs without external buffers, reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3050AIDBVR | 2.5 ppm/°C max TC (vs 50 ppm/°C), 50 μA supply current (vs 160 μA), no enable pin | Lacks shutdown control; better for ultra-stable, always-on references where lowest drift is critical | Select REF3050AIDBVR when long-term stability and ultra-low TC outweigh need for power gating |
| ADR3450ARJZ-R7 | 10 ppm/°C max TC, 120 μA supply current, enable pin included, but only 2 mA output drive (vs ±5 mA) | Lower drive capability limits use with high-capacitance loads or multiple ADC references | Select ADR3450ARJZ-R7 when tighter TC and lower quiescent current are prioritized over output current headroom |
Compared with REF3050AIDBVR and ADR3450ARJZ-R7, the LM4120AIM5X-5.0 uniquely balances A-grade accuracy, enable-controlled shutdown, and ±5 mA drive in a cost-optimized SOT-23-5 package - making it optimal for battery-constrained, intermittently active precision systems.
Availability
LM4120AIM5X-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and automotive cabin electronics requiring stable component supply with consistent lead times and volume pricing.
Supply support for LM4120AIM5X-5.0 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 since the 1980s.
The LM4120 product line delivers micropower, low-dropout voltage references optimized for portable, battery-powered, and industrial measurement systems where accuracy, size, and power efficiency are critical.
FAQ
What is the maximum input voltage rating for LM4120AIM5X-5.0?
The absolute maximum input voltage for LM4120AIM5X-5.0 is 14 V, per the Absolute Maximum Ratings table. For reliable operation, VIN must be maintained between VOUT + 120 mV (i.e., ≥5.12 V) and 12 V under recommended conditions. Exceeding 14 V risks permanent damage, even momentarily.
Does LM4120AIM5X-5.0 require an external output capacitor, and if so, what value?
Yes, LM4120AIM5X-5.0 requires a minimum 0.022 µF ceramic output capacitor for stability. The recommended range is 0.022 µF to 0.047 µF with ESR of 0.1–0.5 Ω. Larger values (up to 1 µF) are allowed only with tantalum capacitors and require a 50-pF capacitor between VOUT and REF - but this configuration is not recommended for LM4120AIM5X-5.0 due to REF pin sensitivity.
Can the REF pin of LM4120AIM5X-5.0 be left floating or connected to ground?
No - the REF pin of LM4120AIM5X-5.0 must remain unconnected (open) in all applications. It is an internal node sensitive to noise and capacitive loading; grounding or routing traces to it degrades output accuracy and stability. PCB layout must isolate REF from adjacent signals and copper pours.
What is the output voltage tolerance of LM4120AIM5X-5.0 over temperature?
LM4120AIM5X-5.0 maintains ±0.2% initial accuracy at 25°C and exhibits a maximum temperature coefficient of 50 ppm/°C over −40°C to 125°C. Over the industrial range (−40°C to 85°C), total output variation is typically ≤±0.35%, combining initial error and thermal drift.
Is LM4120AIM5X-5.0 pin-compatible with other members of the LM4120 family?
Yes - all LM4120 variants in SOT-23-5 (DBV) packaging, including LM4120AIM5X-5.0, share identical pinout, footprint, and enable functionality. Voltage options (1.8 V to 5.0 V) and grade (A vs standard) do not affect mechanical or electrical pin compatibility, enabling drop-in replacement within the same package variant.
LM4120AIM5X-5.0 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):
- 5V
- 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-5.0 FAQ
1.How can I place an order for LM4120AIM5X-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4120AIM5X-5.0 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-5.0 reliable?
The price and inventory of LM4120AIM5X-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4120AIM5X-5.0 is usually 5 days.
3.What payment methods are accepted for LM4120AIM5X-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4120AIM5X-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4120AIM5X-5.0?
LM4120AIM5X-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4120AIM5X-5.0 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-5.0?
For technical support, including LM4120AIM5X-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4120AIM5X-5.0 requirements.
6.How does Aetrix verify that LM4120AIM5X-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4120AIM5X-5.0 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-5.0 meets industry standards.
7.What is the process for return or replacement of LM4120AIM5X-5.0?
All LM4120AIM5X-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4120AIM5X-5.0, 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-5.0 part is unused and in its original packaging.
Return procedure for LM4120AIM5X-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4120AIM5X-5.0 Tags
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TL431AIDBZR
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