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Texas Instruments LM4050BIM3X-2.5/NOPB
- Part No.:
- LM4050BIM3X-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BIM3X-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,385
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Product details
Overview
LM4050BIM3X-2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.5 V reverse breakdown voltage with ±5 mV (±0.2%) initial tolerance at 25°C, 41 μVrms wideband noise (10 Hz–10 kHz), and 50 ppm/°C max temperature coefficient across −40°C to 85°C. It operates from 65 μA to 15 mA and requires no output capacitor, supporting portable instrumentation and battery-powered data acquisition.
For engineers reviewing the LM4050BIM3X-2.5/NOPB datasheet, LM4050BIM3X-2.5/NOPB pinout, LM4050BIM3X-2.5/NOPB application, or LM4050BIM3X-2.5/NOPB equivalent, key selection criteria include its 2.5 V fixed reference accuracy, micropower operation down to 65 μA, SOT-23 footprint compatibility, and stability with capacitive loads-critical for space-constrained analog front-ends and precision ADC biasing.
Technical Context
The LM4050BIM3X-2.5/NOPB uses bandgap-based Zener-zap trimmed shunt regulation with curvature-corrected temperature drift compensation, enabling ±50 ppm/°C max TC over full industrial temperature range. Its low dynamic impedance (0.3 Ω at 1 mA) and absence of required external capacitance simplify layout while maintaining stability under varying load conditions.
It functions as a two-terminal device: cathode accepts input current and sets reference voltage at anode (ground-referenced node), with NC pin unconnected. The design tolerates capacitive loads up to 10 nF without oscillation, eliminating need for series resistance or damping networks in sensor signal conditioning paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; ±5 mV (±0.2%) initial tolerance at 25°C ensures high-accuracy biasing for 12-bit+ ADCs and DACs. |
| Temperature Coefficient | ≤50 ppm/°C max over −40°C to 85°C; enables <±1.3 mV total drift across full industrial range for stable calibration references. |
| Operating Current Range | 65 μA min to 15 mA max; supports ultra-low-power sensor nodes and high-current reference buffering without external components. |
| Output Noise | 41 μVrms (10 Hz–10 kHz); low-noise performance critical for precision measurement systems where reference ripple affects SNR. |
| Dynamic Impedance | 0.3 Ω at 1 mA, 120 Hz; maintains tight regulation under fast load transients in multiplexed data acquisition circuits. |
| Long-Term Stability | 120 ppm after 1000 hrs at 25°C; ensures minimal calibration drift in field-deployed instrumentation and energy metering. |
| Thermal Hysteresis | 0.7 mV over −40°C ↔ 125°C cycling; preserves repeatability in environments with repeated thermal excursions. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, 3-pin configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Input current sink / reference voltage node | Accepts shunt current; voltage at this terminal is regulated 2.5 V above anode; connects to supply rail via current-setting resistor. |
| Anode (Pin 2) | Ground reference / common return | Must be connected to system ground; defines 0 V reference point for the 2.5 V output; all load currents return here. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no electrical function; mechanical support only; must not be tied to any net. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact PCB layouts without stability-compromising external components. |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance-ideal for driving ADC input filters or op-amp buffers without added isolation resistors. |
| Fixed 2.5 V reverse breakdown | Matches standard logic supply rails and 10-bit/12-bit ADC full-scale ranges, simplifying gain scaling in analog front-ends. |
| Micropower operation (65 μA min) | Extends battery life in portable test equipment and wireless sensor nodes where quiescent current is tightly constrained. |
| Industrial temperature range | Rated for −40°C to +85°C ambient operation-suitable for factory automation, process control, and outdoor instrumentation. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeters and portable oscilloscopes requiring stable, low-drift reference for ADC conversion. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 2.5 V reference for successive-approximation ADCs and digital calibration circuits. Use Value: ±5 mV initial tolerance and ≤50 ppm/°C TC ensure <±2 LSB error over temperature in 12-bit systems without recalibration. |
Use Scenario: Modular DAQ modules in industrial PLCs acquiring analog sensor signals (thermocouples, strain gauges). IC Role / Device Role / Timing Role: Precision reference source for sigma-delta ADCs and programmable gain instrumentation amplifiers. Use Value: 41 μVrms noise and 0.3 Ω dynamic impedance minimize reference-induced quantization noise and load-induced voltage sag. |
| Energy Metering | Process Control Transmitters |
Use Scenario: Residential and commercial smart meters measuring voltage, current, and power with metrology-grade accuracy. IC Role / Device Role / Timing Role: Primary voltage reference for polyphase energy measurement ICs (e.g., ADE7xxx family) and anti-tampering calibration storage. Use Value: 120 ppm long-term stability and 0.7 mV thermal hysteresis ensure annual calibration drift remains within ANSI C12.20 Class 0.2 limits. |
Use Scenario: 4–20 mA loop-powered transmitters converting RTD or pressure sensor outputs in chemical plants. IC Role / Device Role / Timing Role: Stable excitation and reference source for ratiometric bridge measurements and DAC output scaling. Use Value: Micropower operation (65 μA min) allows full functionality within 3.5 mA loop budget while maintaining 2.5 V accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | 2.5 V, ±0.2% initial accuracy, 50 ppm/°C TC, but higher 50 μA typical quiescent current; requires 1 μF output capacitor for stability. | Not suitable for capacitor-free designs or ultra-low-IQ systems; better PSRR (65 dB vs 30 dB) for noisy supply environments. | Select REF3025AIDBZR when supply rejection is prioritized over board area and capacitor count. |
| ADR3425ARTZ-REEL7 | 2.5 V, ±0.1% initial accuracy, 30 ppm/°C TC, 12 μA typical IQ, but 3-pin SOT-23 with different pinout (VOUT/GND/NC) and series topology-not shunt. | Cannot replace LM4050BIM3X-2.5/NOPB directly; requires redesign of current-source bias network and load connection. | Choose ADR3425ARTZ-REEL7 only for new designs targeting lowest possible quiescent current and highest initial accuracy, accepting topology change. |
Compared with REF3025AIDBZR and ADR3425ARTZ-REEL7, the LM4050BIM3X-2.5/NOPB uniquely combines shunt topology, capacitor-free operation, and SOT-23 pin compatibility-making it the only drop-in solution for legacy 2.5 V reference upgrades in space-limited, low-power analog systems.
Availability
LM4050BIM3X-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, energy metering, and industrial process control requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050BIM3X-2.5/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 leadership in precision analog ICs and industrial-grade components.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement applications-designed to replace bulkier three-terminal references without sacrificing stability or accuracy.
FAQ
What is the minimum operating current for LM4050BIM3X-2.5/NOPB?
The LM4050BIM3X-2.5/NOPB requires a minimum operating current of 65 μA across the industrial temperature range (−40°C to 85°C), as specified in Section 6.6 of the datasheet. This value increases slightly to 73 μA for the 4.096 V variant but remains 65 μA for the 2.5 V version. Below this threshold, regulation is not guaranteed, and output voltage may deviate beyond tolerance limits.
Does LM4050BIM3X-2.5/NOPB require an external output capacitor?
No, the LM4050BIM3X-2.5/NOPB does not require an external output capacitor for stability. Its internal design eliminates the need for stabilization components, and it remains stable with any capacitive load up to 10 nF-enabling direct connection to ADC inputs, op-amp buffers, or filter networks without added series resistance or compensation.
What is the temperature coefficient specification for LM4050BIM3X-2.5/NOPB?
The LM4050BIM3X-2.5/NOPB has a maximum temperature coefficient of 50 ppm/°C over the industrial temperature range (−40°C to 85°C). At 25°C, the typical TC is ±15 ppm/°C, but the worst-case limit across full temperature range is ±50 ppm/°C, resulting in ≤±1.3 mV total drift for the 2.5 V output.
How is the LM4050BIM3X-2.5/NOPB pinout configured in SOT-23?
The LM4050BIM3X-2.5/NOPB uses the DBZ SOT-23 package with Pin 1 = Cathode, Pin 2 = Anode (ground), and Pin 3 = NC (no internal connection). Pin 3 must remain unconnected-tying it to ground or any other net violates the datasheet requirement and may impair performance or reliability.
Is LM4050BIM3X-2.5/NOPB suitable for automotive applications?
No, LM4050BIM3X-2.5/NOPB is not automotive-qualified. It belongs to the industrial-grade LM4050-N series. For automotive use, TI offers the LM4050-N-Q1 (e.g., LM4050BIM3X-2.5Q1), which is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and manufactured on an automotive-grade flow-LM4050BIM3X-2.5/NOPB lacks those qualifications and testing.
LM4050BIM3X-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 41µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050BIM3X-2.5/NOPB FAQ
1.How can I place an order for LM4050BIM3X-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIM3X-2.5/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 LM4050BIM3X-2.5/NOPB reliable?
The price and inventory of LM4050BIM3X-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIM3X-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050BIM3X-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIM3X-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIM3X-2.5/NOPB?
LM4050BIM3X-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIM3X-2.5/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 LM4050BIM3X-2.5/NOPB?
For technical support, including LM4050BIM3X-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIM3X-2.5/NOPB requirements.
6.How does Aetrix verify that LM4050BIM3X-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050BIM3X-2.5/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 LM4050BIM3X-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050BIM3X-2.5/NOPB?
All LM4050BIM3X-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIM3X-2.5/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 LM4050BIM3X-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050BIM3X-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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