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Texas Instruments LM4120AIM5-4.1/NOPB
- Part No.:
- LM4120AIM5-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4120AIM5-4.1/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,944
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Product details
Overview
LM4120AIM5-4.1/NOPB from Texas Instruments is a precision micropower low-dropout bandgap voltage reference delivering 4.096 V output with ±0.2% initial accuracy, 50 ppm/°C temperature coefficient, and 120 mV typical dropout at 1 mA load - enabling stable biasing in portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the LM4120AIM5-4.1/NOPB datasheet, LM4120AIM5-4.1/NOPB pinout, LM4120AIM5-4.1/NOPB application, or LM4120AIM5-4.1/NOPB equivalent, key selection criteria include enable-controlled power-down (ISS < 2 µA), ±5 mA source/sink capability, SOT-23-5 package compatibility, and industrial temperature range (−40°C to 85°C) operation without external compensation.
Technical Context
The LM4120AIM5-4.1/NOPB implements a bandgap-based reference core with integrated enable control logic and low-impedance output buffer. Its architecture supports operation from VIN = VOUT + 120 mV up to 12 V while maintaining 160 µA typical supply current and sub-2 µA shutdown current.
It features a dedicated REF pin (unconnected), GND-referenced enable input with 0.4 V logic-low threshold, and output stability with 0.022–0.047 µF ceramic capacitors - eliminating need for series resistance or external compensation networks in standard configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V ±0.2% (A-grade initial accuracy ensures ≤8.2 mV absolute error at 25°C) |
| Temperature Coefficient | 50 ppm/°C (ensured −40°C to 125°C; guarantees ≤2.05 mV drift over full industrial range) |
| Dropout Voltage | 120 mV typical at 1 mA (enables regulation from 4.216 V input; supports single-cell Li-ion or 5 V rail margin) |
| Supply Current | 160 µA typical (enables >1-year battery life in 10 µA system sleep mode with periodic wake-up) |
| Power-Down Current | <2 µA (reduces standby loss by 80× vs active mode; critical for always-on sensor nodes) |
| Output Drive | ±5 mA (supports direct driving of ADC reference inputs, op-amp bias networks, or DAC buffers) |
| Noise (0.1–10 Hz) | 20 µVPP (low flicker noise preserves SNR in 16-bit+ data acquisition front-ends) |
Pinout & Package
SOT-23-5 (DBV) package: 1.60 mm × 2.90 mm body, 0.95 mm height, gull-wing leads, RoHS-compliant matte tin (SN) finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF | Reference node | Must remain unconnected; sensitive to noise and capacitive loading - requires guard ring and no routing underneath |
| 2 - GND | Ground reference | Low-impedance return path for output and enable currents; must connect directly to PCB ground plane |
| 3 - EN | Enable control input | Analog input requiring ≥2.4 V for activation; pulled to GND disables output and reduces current to <2 µA |
| 4 - VIN | Positive supply input | Accepts 4.216 V to 12 V; internal LDO structure eliminates need for pre-regulation in most battery applications |
| 5 - VOUT | Regulated reference output | Delivers 4.096 V with ±5 mA sourcing/sinking; stable with 0.022 µF ceramic capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Enable-controlled shutdown | Reduces quiescent current to <2 µA - extends battery life in intermittent-sampling systems |
| Low dropout operation | 120 mV at 1 mA enables use with Li-ion (3.0–4.2 V) or regulated 5 V rails without headroom penalty |
| A-grade precision | ±0.2% initial accuracy and 50 ppm/°C TC ensure ≤0.5 LSB error in 12-bit ADC references across temperature |
| Source/sink capability | ±5 mA drive strength eliminates external buffer for driving SAR ADC references or op-amp gain-setting networks |
| Stability without external components | Operates unconditionally stable with 0.022–0.047 µF ceramic output capacitors - simplifies layout and BOM |
Applications
| Portable Instrumentation | Battery-Powered Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and auto-ranging front-end. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and analog front-end calibration. Use Value: 4.096 V output matches common 12-bit full-scale ranges (e.g., 0–4.096 V = 0–4095 counts); ±0.2% accuracy eliminates factory recalibration. |
Use Scenario: Wireless environmental sensor node logging temperature/humidity with 12-bit ADC and BLE transmission. IC Role / Device Role / Timing Role: Stable reference for precision analog sensing and ADC digitization during brief active cycles. Use Value: 160 µA operating current and <2 µA shutdown current maximize coin-cell battery lifetime (>2 years at 1-min sampling interval). |
| Precision Regulator Feedback | Medical Sensor Biasing |
Use Scenario: Low-noise 5 V LDO regulator for analog signal chain, using LM4120AIM5-4.1/NOPB in feedback divider. IC Role / Device Role / Timing Role: High-accuracy reference element setting output voltage via resistive divider. Use Value: 50 ppm/°C TC and 20 µVPP low-frequency noise prevent gain drift and baseline wander in sensitive amplifiers. |
Use Scenario: ECG front-end amplifier requiring ultra-stable DC bias for electrode offset cancellation. IC Role / Device Role / Timing Role: Reference source for programmable gain amplifier (PGA) and ADC reference voltage. Use Value: Sub-2 µV/°C drift and low thermal hysteresis (0.5 mV/V) maintain baseline stability across patient temperature variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3040AIDBZR | 4.096 V, ±0.2%, 50 ppm/°C, but 50 µA supply current and no enable pin | Lacks power-down capability; unsuitable for duty-cycled systems requiring µA-level sleep current | Select when lowest possible quiescent current is not required and enable control is unnecessary |
| ADR3440ARJZ-R7 | 4.096 V, ±0.1%, 10 ppm/°C, 120 µA supply current, no enable, SOT-23-5 | Higher accuracy and lower TC, but no shutdown mode and higher cost | Select when long-term stability and temperature drift dominate over power budget and control flexibility |
Compared with REF3040AIDBZR and ADR3440ARJZ-R7, the LM4120AIM5-4.1/NOPB uniquely balances A-grade accuracy, enable-controlled ultra-low-power shutdown, and SOT-23-5 footprint - making it optimal for battery-constrained, intermittently active precision measurement systems.
Availability
LM4120AIM5-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data acquisition, and precision regulator feedback applications requiring stable component supply with guaranteed long-term availability.
Supply support for LM4120AIM5-4.1/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 designing analog ICs, embedded processors, and digital signal solutions for industrial, automotive, and consumer markets.
The LM4120 series was developed specifically for micropower, low-dropout precision voltage referencing in space- and energy-constrained applications - emphasizing enable control, SOT-23 integration, and industrial temperature reliability.
FAQ
What is the maximum input voltage for LM4120AIM5-4.1/NOPB?
The LM4120AIM5-4.1/NOPB supports input voltages up to 12 V, as specified in its Absolute Maximum Ratings. Operation above this level risks permanent damage. For reliable performance, VIN should be maintained between VOUT + 120 mV (i.e., ≥4.216 V) and 12 V under recommended conditions.
Does LM4120AIM5-4.1/NOPB require an output capacitor?
Yes - the LM4120AIM5-4.1/NOPB requires a minimum 0.022 µF ceramic output capacitor for stability. TI specifies stable operation with 0.022–0.047 µF ceramic capacitors; larger values (up to 1 µF) are permitted only with tantalum types and additional design validation per datasheet Section 8.1.
What is the function of the REF pin on LM4120AIM5-4.1/NOPB?
The REF pin (Pin 1) on LM4120AIM5-4.1/NOPB must remain unconnected in all applications. It is an internal reference node highly sensitive to noise and capacitive loading; connecting or routing near this pin degrades accuracy and stability per TI's layout guidelines.
Can LM4120AIM5-4.1/NOPB sink current?
Yes - the LM4120AIM5-4.1/NOPB provides true bidirectional output drive with ±5 mA capability. It can both source and sink up to 5 mA, enabling direct interfacing with op-amp inputs, ADC reference buffers, or current-steering circuits without external components.
What is the thermal hysteresis specification for LM4120AIM5-4.1/NOPB?
The LM4120AIM5-4.1/NOPB has a thermal hysteresis of 0.5 mV/V (max) over −40°C to 125°C, meaning output voltage change after cycling between temperature extremes is ≤2.05 mV at 4.096 V output - critical for repeatable calibration in field-deployed instruments.
LM4120AIM5-4.1/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):
- 4.096V
- 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
LM4120AIM5-4.1/NOPB FAQ
1.How can I place an order for LM4120AIM5-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4120AIM5-4.1/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 LM4120AIM5-4.1/NOPB reliable?
The price and inventory of LM4120AIM5-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4120AIM5-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4120AIM5-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4120AIM5-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4120AIM5-4.1/NOPB?
LM4120AIM5-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4120AIM5-4.1/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 LM4120AIM5-4.1/NOPB?
For technical support, including LM4120AIM5-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4120AIM5-4.1/NOPB requirements.
6.How does Aetrix verify that LM4120AIM5-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4120AIM5-4.1/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 LM4120AIM5-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4120AIM5-4.1/NOPB?
All LM4120AIM5-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4120AIM5-4.1/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 LM4120AIM5-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4120AIM5-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4120AIM5-4.1/NOPB Tags
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