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Texas Instruments LM4120IM5-5.0
- Part No.:
- LM4120IM5-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4120IM5-5.0.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,232
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Product details
Overview
LM4120IM5-5.0 from Texas Instruments is a precision micropower low-dropout bandgap voltage reference delivering 5.0 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 - enabling high-accuracy analog sensing and ADC reference in space-constrained battery-powered systems.
For engineers reviewing the LM4120IM5-5.0 datasheet, LM4120IM5-5.0 pinout, LM4120IM5-5.0 application, or LM4120IM5-5.0 equivalent, key selection criteria include output accuracy over industrial temperature (−40°C to 85°C), low-quiescent-current power-down mode (<2 μA), SOT-23-5 package compatibility, and fixed 5.0 V output with enable functionality.
Technical Context
The LM4120IM5-5.0 implements a bandgap-based reference core with internal error amplifier and pass transistor, supporting operation from VIN = VOUT + 120 mV up to 12 V. Its enable pin provides analog-controlled shutdown with logic-low threshold ≤0.4 V and logic-high threshold ≥2.4 V, drawing ≤15 μA input current.
Designed for stability with 0.022–0.047 μF ceramic output capacitors, it achieves 36 μVPP (10 Hz–10 kHz) noise and maintains load regulation of 0.04%/mA (1–5 mA) and line regulation of 0.008%/V across its operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±0.5% initial accuracy at 25°C - ensures stable reference for 12-bit+ SAR ADCs without trimming |
| Temperature Coefficient | 50 ppm/°C (−40°C to 125°C) - limits drift to ±2.25 mV over full industrial range |
| Dropout Voltage | 120 mV typical at 1 mA - enables operation from 5.12 V supply, critical for single-cell Li-ion or regulated 5 V rails |
| Supply Current | 160 μA typical - supports >1-year battery life in 10 μA average-power IoT sensor nodes |
| Enable Threshold | 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 ADC reference inputs, op-amp bias networks, or DAC buffers |
| Power-Down Current | ≤2 μA - reduces system standby power by >98% vs active mode |
Pinout & Package
SOT-23-5 (DBV) package, 1.60 mm × 2.90 mm body size, RoHS-compliant tin-silver (Cu Sn) finish, moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Reference node | Must remain unconnected - sensitive to noise and capacitive loading; PCB isolation required |
| 2 (GND) | Ground reference | Return path for load current and internal circuitry; low-impedance connection essential for accuracy |
| 3 (EN) | Enable control input | Analog input: pull ≥2.4 V for normal operation; pull ≤0.4 V to enter <2 μA shutdown mode |
| 4 (VIN) | Positive supply input | Accepts 2 V to 12 V; must exceed VOUT by ≥120 mV for regulation |
| 5 (VOUT) | Regulated reference output | 5.0 V precision output; capable of sourcing or sinking up to ±5 mA |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 120 mV typical at 1 mA - enables use with tightly regulated 5 V supplies or single-cell battery inputs |
| Enable-controlled shutdown | <2 μA quiescent current in power-down - eliminates reference-related leakage in sleep modes |
| Source/sink capability | ±5 mA output drive - eliminates need for external buffer in most data acquisition signal chains |
| Low-noise performance | 36 μVPP (10 Hz–10 kHz) - meets SNR requirements for 16-bit ADCs without additional filtering |
| Industrial temperature range | Specified from −40°C to +85°C - validated for deployment in automotive cabin, industrial PLC, and outdoor metering |
Applications
| Portable Instrumentation | Automotive Cabin Sensors |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and lithium coin-cell power. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and internal LDO feedback. Use Value: 50 ppm/°C drift and 160 μA supply current extend battery life beyond 2 years while maintaining ±0.1% measurement accuracy. | Use Scenario: Occupant detection module using capacitive sensing and microcontroller with integrated ADC. IC Role / Device Role / Timing Role: Stable 5.0 V reference for analog front-end and ADC reference rail. Use Value: Enable pin allows synchronous shutdown with MCU sleep mode, reducing system standby current to <5 μA. |
| Industrial Process Transmitters | Medical Patient Monitoring |
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART communication. IC Role / Device Role / Timing Role: Precision reference for DAC generating loop current and sensor excitation. Use Value: ±0.5% initial accuracy and 0.04%/mA load regulation ensure <0.1% total loop error across 4–20 mA span. | Use Scenario: Portable ECG device with low-noise analog front-end and 12-bit ADC sampling at 1 kHz. IC Role / Device Role / Timing Role: Low-noise 5.0 V reference for ADC and op-amp biasing. Use Value: 36 μVPP broadband noise contributes <0.5 LSB error, preserving diagnostic signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C50IDBZR | Shunt reference; requires external bias resistor; 0.5% accuracy; no enable pin; 50 ppm/°C | Fixed 5.0 V shunt topology - suited for low-cost, low-current applications where VIN is stable and higher than 5.0 V | Select when board space permits resistor placement and enable control is unnecessary |
| MAX6126ASA50+T | Series reference; 0.1% accuracy; 3 ppm/°C; 125 μA supply current; no enable pin; SO-8 package | Higher precision and lower drift - used where metrology-grade accuracy is required, but lacks shutdown capability | Select when long-term stability and ultra-low drift outweigh need for power gating |
Compared with LM4120IM5-5.0, LM4040C50IDBZR offers simpler biasing but no enable control or source/sink drive, while MAX6126ASA50+T delivers superior accuracy and drift at the cost of larger footprint and no power-down function - making LM4120IM5-5.0 optimal for compact, battery-aware designs requiring moderate precision and active power management.
Availability
LM4120IM5-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and industrial process transmitters requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4120IM5-5.0 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 and broad industrial portfolio coverage.
The LM4120 product line delivers micropower, low-dropout voltage references optimized for battery-operated and space-constrained applications demanding accuracy, stability, and enable-controlled power management.
FAQ
What is the maximum input voltage for the LM4120IM5-5.0?
The LM4120IM5-5.0 supports a maximum input voltage of 12 V, as specified in its Absolute Maximum Ratings. Operation above this level risks permanent damage. For reliable regulation, VIN must remain within 2 V to 12 V, and must exceed VOUT by at least 120 mV under 1 mA load to maintain output accuracy. The device includes internal protection against reverse current flow from VOUT to VIN.
Does the LM4120IM5-5.0 require an output capacitor, and if so, what value?
Yes, the LM4120IM5-5.0 requires a minimum 0.022 μF ceramic output capacitor for stability, with recommended values between 0.022 μF and 0.047 μF. Larger values up to 1 μF are permissible but require tantalum construction above 0.047 μF. The capacitor must be placed close to VOUT and GND; insufficient capacitance causes oscillation or degraded transient response in the LM4120IM5-5.0.
How does the enable pin function on the LM4120IM5-5.0?
The enable pin (Pin 3) of the LM4120IM5-5.0 controls device activation: pulling it to ≥2.4 V enables normal operation, while pulling it to ≤0.4 V places the LM4120IM5-5.0 in shutdown mode with <2 μA supply current. The pin draws ≤15 μA and has minimal hysteresis; floating is not allowed. Direct connection to VIN is acceptable if shutdown is unused.
What is the output voltage accuracy specification for the LM4120IM5-5.0 over temperature?
The LM4120IM5-5.0 is specified for ±0.5% initial accuracy at 25°C and maintains this grade over the industrial temperature range (−40°C to +85°C). Its 50 ppm/°C temperature coefficient ensures total output variation remains within ±2.25 mV across that range - confirmed by TI's Statistical Quality Control (SQC) validation, not extrapolated.
Can the LM4120IM5-5.0 sink current, and how much?
Yes, the LM4120IM5-5.0 can both source and sink up to ±5 mA, as explicitly stated in its Features and Electrical Characteristics tables. This bidirectional capability allows it to actively regulate loads that may pull current from the reference rail - such as op-amp inputs or DAC feedback networks - without requiring external components. Performance is characterized across the full −40°C to +85°C range.
LM4120IM5-5.0 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:
- ±0.5%
- 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
LM4120IM5-5.0 FAQ
1.How can I place an order for LM4120IM5-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4120IM5-5.0 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 LM4120IM5-5.0 reliable?
The price and inventory of LM4120IM5-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4120IM5-5.0 is usually 5 days.
3.What payment methods are accepted for LM4120IM5-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4120IM5-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4120IM5-5.0?
LM4120IM5-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4120IM5-5.0 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 LM4120IM5-5.0?
For technical support, including LM4120IM5-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4120IM5-5.0 requirements.
6.How does Aetrix verify that LM4120IM5-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4120IM5-5.0 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 LM4120IM5-5.0 meets industry standards.
7.What is the process for return or replacement of LM4120IM5-5.0?
All LM4120IM5-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4120IM5-5.0, 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 LM4120IM5-5.0 part is unused and in its original packaging.
Return procedure for LM4120IM5-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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