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Texas Instruments LM4050BIM3-2.5
- Part No.:
- LM4050BIM3-2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BIM3-2.5.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,101
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Product details
Overview
LM4050BIM3-2.5 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.500 V reverse breakdown voltage with ±5 mV (±0.2%) initial tolerance at 100 μA, 50 ppm/°C max temperature coefficient, and 41 μVrms wideband noise (10 Hz–10 kHz). It operates from 65 μA to 15 mA over −40°C to 85°C and serves as a compact, capacitor-free reference in analog front-ends and ADC biasing circuits.
For engineers reviewing the LM4050BIM3-2.5 datasheet, LM4050BIM3-2.5 pinout, LM4050BIM3-2.5 application, or LM4050BIM3-2.5 equivalent, key selection criteria include its 2.5 V fixed output, B-grade accuracy, SOT-23 thermal performance (RθJA = 287°C/W), and compatibility with capacitive loads without external stabilization.
Technical Context
The LM4050BIM3-2.5 uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, enabling stable 2.5 V regulation across industrial temperatures. Its dynamic impedance is 0.3 Ω at 1 mA, supporting low-noise, high-PSRR analog signal chains.
It requires no output capacitor and tolerates arbitrary capacitive loading due to internal phase compensation-eliminating stability concerns in battery-powered sensor nodes and portable instrumentation where board space and component count are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal at 100 μA; enables precise 2.5 V biasing for 12-bit+ SAR ADCs and op-amp references. |
| Initial Tolerance | ±5 mV (±0.2%) at 25°C; B-grade accuracy suitable for mid-precision industrial sensing and calibration. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 85°C; ensures ≤±13 mV total drift across full industrial range. |
| Operating Current | 65 μA min to 15 mA max; supports ultra-low-power wake-up modes and high-current DAC reference buffering. |
| Output Noise | 41 μVrms (10 Hz–10 kHz); low enough for 16-bit data acquisition without additional filtering. |
| Dynamic Impedance | 0.3 Ω at 1 mA, 120 Hz; maintains regulation stability under fast load transients in closed-loop systems. |
| Long-Term Stability | 120 ppm after 1000 hrs; predictable aging behavior for field-deployed energy metering and test equipment. |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm footprint, surface-mount, thermally efficient (RθJA = 287°C/W), rated for 280 mW max power dissipation at 25°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connects to regulated supply rail; sinks all load + reference current; voltage setpoint appears here. |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; defines 0 V reference for cathode voltage; no internal connection to substrate. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no electrical function; not bonded or connected internally. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internal compensation ensures unconditional stability with any capacitive load-reduces BOM count and layout sensitivity. |
| Tolerates capacitive loads | Stable into ≥100 nF; enables direct interface with ADC input caps, filter networks, and long PCB traces without oscillation. |
| Fixed 2.5 V breakdown | Factory-trimmed Zener-zap process guarantees 2.500 V ±5 mV at 100 μA-no external resistor network needed. |
| Micropower operation | 65 μA minimum operating current allows use in always-on sensor monitors with multi-year battery life. |
| Industrial temp range | Specified from −40°C to +85°C; qualified for factory automation, PLC I/O modules, and outdoor environmental sensors. |
Applications
| Portable Data Loggers | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and pressure with 16-bit ADC sampling every 10 seconds. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V excitation and ADC reference voltage. Use Value: Enables <1 LSB error over temperature with 65 μA quiescent current, extending coin-cell life beyond 5 years. |
Use Scenario: 4–20 mA transmitter module converting RTD or strain gauge signals in factory-floor machinery. IC Role / Device Role / Timing Role: Precision voltage reference for instrumentation amplifier gain-setting and ADC reference. Use Value: 50 ppm/°C TC and ±5 mV tolerance ensure <0.1% total measurement error across −25°C to 70°C ambient. |
| Energy Meter Reference Subsystem | Automotive Cabin Climate Controller |
Use Scenario: Class 0.5 electricity meter using isolated sigma-delta ADCs for voltage and current channel measurement. IC Role / Device Role / Timing Role: Primary shunt reference for metrology-grade analog front-end calibration. Use Value: 120 ppm long-term stability and 41 μVrms noise meet IEC 62053-21 accuracy requirements without recalibration. |
Use Scenario: HVAC control unit in passenger vehicle cabin monitoring thermistor arrays and driving PWM fan drivers. IC Role / Device Role / Timing Role: Stable 2.5 V reference for microcontroller ADC and analog comparator thresholds. Use Value: Operates reliably across −40°C to +85°C engine bay proximity; NC pin simplifies layout in tight ECU enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040BIM3-2.5 | Higher 100 μA min operating current; 20 ppm/°C typical TC (vs. 50 ppm/°C max for LM4050BIM3-2.5); same SOT-23 package. | Better TC performance but less suitable for sub-100 μA ultra-low-power designs. | Select when tighter temperature drift is prioritized over minimum current; not drop-in due to higher IRMIN. |
| REF3025AIDBZR | Series reference (not shunt); 2.5 V output; 50 ppm/°C max TC; 50 μA quiescent current; SOT-23 package. | Requires input-to-output headroom (~100 mV); incompatible with shunt topology constraints (e.g., floating ground). | Choose only if system architecture permits series configuration and ground-referenced output is required. |
Compared with LM4040BIM3-2.5 and REF3025AIDBZR, the LM4050BIM3-2.5 uniquely balances ultra-low operating current (65 μA), guaranteed 2.5 V accuracy, and shunt topology flexibility-making it optimal for space-constrained, battery-operated, ground-referenced analog systems where external capacitors must be avoided.
Availability
LM4050BIM3-2.5 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and energy metering systems requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4050BIM3-2.5 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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision reference design and automotive-qualified components.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-sensitive applications-including portable medical devices, handheld test equipment, and industrial IoT edge nodes-where capacitor-free operation and guaranteed 2.5 V accuracy are critical.
FAQ
What is the minimum operating current for LM4050BIM3-2.5?
The LM4050BIM3-2.5 requires a minimum operating current of 65 μA across its full industrial temperature range (−40°C to +85°C), as specified in Section 6.6 of the SNOS455G datasheet. This value is measured at the cathode terminal and ensures stable 2.500 V regulation. Below this threshold, output voltage may deviate beyond the ±5 mV initial tolerance band.
Does LM4050BIM3-2.5 require an external output capacitor?
No, the LM4050BIM3-2.5 does not require an external output capacitor. Its internal compensation ensures unconditional stability with any capacitive load, including direct connection to ADC input capacitors or long PCB traces. This eliminates risk of oscillation and reduces bill-of-materials count-confirmed in the "No Output Capacitor Required" feature and functional description of the SNOS455G datasheet.
What is the temperature coefficient specification for LM4050BIM3-2.5?
The LM4050BIM3-2.5 has a maximum average temperature coefficient of 50 ppm/°C over the industrial temperature range (−40°C to +85°C), as stated in Section 6.6 of the SNOS455G datasheet. At 25°C, the typical TC is ±15 ppm/°C. This translates to a worst-case voltage drift of ±13 mV across the full range, calculated as 2.5 V × 50 ppm/°C × 65°C.
Is LM4050BIM3-2.5 compatible with automotive applications?
The LM4050BIM3-2.5 is rated for the industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. For automotive applications, TI offers the pin-compatible LM4050BQIM3-2.5 (Q1 grade), which is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and manufactured on an automotive-grade flow. The standard LM4050BIM3-2.5 should not be used in safety-critical automotive systems.
What is the reverse dynamic impedance of LM4050BIM3-2.5?
The reverse dynamic impedance of LM4050BIM3-2.5 is 0.3 Ω, measured at 1 mA DC current and 120 Hz AC signal with 0.1×IR AC amplitude (Section 6.6, SNOS455G). This low impedance ensures minimal output voltage variation under load transients-critical for maintaining ADC reference accuracy during multiplexed sampling or digital switching noise events.
LM4050BIM3-2.5 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:
- Obsolete
- 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
LM4050BIM3-2.5 FAQ
1.How can I place an order for LM4050BIM3-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIM3-2.5 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 LM4050BIM3-2.5 reliable?
The price and inventory of LM4050BIM3-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIM3-2.5 is usually 5 days.
3.What payment methods are accepted for LM4050BIM3-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIM3-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIM3-2.5?
LM4050BIM3-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIM3-2.5 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 LM4050BIM3-2.5?
For technical support, including LM4050BIM3-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIM3-2.5 requirements.
6.How does Aetrix verify that LM4050BIM3-2.5 is sourced from the original manufacturer or authorized distributors?
All LM4050BIM3-2.5 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 LM4050BIM3-2.5 meets industry standards.
7.What is the process for return or replacement of LM4050BIM3-2.5?
All LM4050BIM3-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIM3-2.5, 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 LM4050BIM3-2.5 part is unused and in its original packaging.
Return procedure for LM4050BIM3-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050BIM3-2.5 Tags
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