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Texas Instruments LM4050CIM3-2.5/NOPB
- Part No.:
- LM4050CIM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CIM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,116
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Product details
Overview
LM4050CIM3-2.5/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 ±13 mV (±0.5%) initial tolerance at 25°C, 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 requires no output capacitor.
For engineers reviewing the LM4050CIM3-2.5/NOPB datasheet, LM4050CIM3-2.5/NOPB pinout, LM4050CIM3-2.5/NOPB application, or LM4050CIM3-2.5/NOPB equivalent, this device serves as a space-constrained, low-noise, high-stability reference for ADC/DAC biasing, portable instrumentation, and battery-powered sensor signal conditioning where tight voltage accuracy and minimal quiescent current are critical.
Technical Context
The LM4050CIM3-2.5/NOPB uses bandgap-derived Zener-zap trimmed reverse breakdown voltage with curvature-corrected temperature drift compensation. Its shunt topology sinks current through the cathode to maintain precise 2.5 V across anode-to-cathode terminals, enabling flexible use with series resistors and capacitive loads up to 10 nF without instability.
It features fuse-trimmed wafer-sort calibration for C-grade (±0.5%) accuracy, low dynamic impedance (0.3 Ω at 1 mA), and thermal hysteresis of only 0.7 mV after cycling between −40°C and +125°C - confirming robust performance in industrial temperature-cycled systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; fixed reverse breakdown voltage, calibrated at 100 μA test current |
| Initial Tolerance | ±13 mV (±0.5%) at 25°C; defines maximum deviation before temperature or load effects |
| Temp Coefficient | ≤50 ppm/°C over −40°C to +85°C; ensures ≤±8.125 mV drift across full industrial range |
| Min Operating Current | 65 μA (max) over −40°C to +85°C; minimum cathode current needed to regulate |
| Dynamic Impedance | 0.3 Ω at 1 mA, 120 Hz; enables stable regulation under fast load transients |
| Wideband Noise | 41 μVrms (10 Hz–10 kHz); supports high-resolution data acquisition without added filtering |
| Long-Term Stability | 120 ppm (1000 hrs @ 25°C); predictable aging behavior for calibration-critical systems |
Pinout & Package
SOT-23 (DBZ) package, 3-pin surface-mount, body size 2.92 mm × 1.30 mm. Pin 3 is NC (no internal connection); pin 2 (Anode) connects to system ground; pin 1 (Cathode) carries shunt current and sets regulated voltage node.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Current sink terminal; voltage at this node is regulated to 2.5 V relative to Anode |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms the 2.5 V reference potential reference point |
| NC (Pin 3) | No internal connection | Must be left floating; not bonded internally and has no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with zero external capacitance - reduces BOM count and PCB area |
| Tolerates capacitive loads | Remains stable with ≥10 nF load capacitance - simplifies filtering in noisy environments |
| Fixed 2.5 V breakdown | Factory-trimmed Zener voltage eliminates need for external resistor networks or trimming |
| Micropower operation | 65 μA min operating current enables >10-year battery life in ultra-low-power sensor nodes |
| Industrial temp range | Specified from −40°C to +85°C - suitable for factory automation, outdoor metering, and motor control |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter or portable gas analyzer requiring stable reference for 16-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 2.5 V reference to ADC VREF pin and analog front-end biasing. Use Value: ±13 mV initial tolerance and 50 ppm/°C drift ensure <0.01% measurement error across operating temperature without recalibration. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifier and successive-approximation ADC. Use Value: 41 μVrms low noise prevents degradation of effective resolution below 16 ENOB in 100 kSPS sampling. |
| Energy Management | Precision Audio Components |
Use Scenario: Smart electricity meter with metrology-grade voltage and current channel references. IC Role / Device Role / Timing Role: Primary shunt reference for isolated voltage sensing and anti-tampering monitoring circuitry. Use Value: 120 ppm long-term stability ensures calibration validity over 10+ years per IEC 62053 compliance requirements. |
Use Scenario: High-fidelity DAC-based audio line driver with DC offset cancellation. IC Role / Device Role / Timing Role: Low-noise 2.5 V bias reference for op-amp input stage and DAC reference buffer. Use Value: Sub-50 μVrms noise floor avoids audible hiss and preserves >110 dB SNR in Class-D amplifier feedback paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C25IDBZR | Same 2.5 V, ±0.5%, SOT-23; 45 μVrms noise, 60 μA min current, 60 ppm/°C max TC | Slightly higher noise and tempco; identical pinout and footprint | Valid drop-in alternative if TI second-source assurance is required; verify noise budget margin |
| ADR3425ARJZ-R7 | 2.5 V, ±0.1% (A-grade), SOT-23; 12 μVrms noise, 100 μA min current, 10 ppm/°C max TC | Higher precision and lower noise, but requires ≥100 μA - unsuitable for sub-100 μA battery systems | Preferred when ultra-low drift and noise dominate; redesign series resistor for higher bias current |
Compared with LM4050CIM3-2.5/NOPB, TL4050C25IDBZR offers identical form-factor and cost profile with minor noise/TC trade-offs, while ADR3425ARJZ-R7 delivers superior accuracy and noise at the cost of higher minimum operating current and price - making it optimal only where metrology-grade stability justifies the overhead.
Availability
LM4050CIM3-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and energy management systems requiring stable component supply with guaranteed long-lifecycle support.
Supply support for LM4050CIM3-2.5/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 leader specializing in analog, embedded processing, and power management ICs, with decades of leadership in precision reference design.
The LM4050-N family was engineered for space-constrained, battery-operated, and industrial-grade systems needing stable, low-drift, capacitor-free shunt references - targeting instrumentation, sensor interfaces, and metrology applications.
FAQ
What is the minimum operating current for LM4050CIM3-2.5/NOPB across its full temperature range?
The LM4050CIM3-2.5/NOPB requires a minimum cathode current of 65 μA over 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 C-grade part. Below this current, regulation is not guaranteed and output voltage may deviate beyond specification.
Does LM4050CIM3-2.5/NOPB require an external capacitor for stability?
No, the LM4050CIM3-2.5/NOPB does not require an external output capacitor for stability. Its internal design tolerates capacitive loads up to at least 10 nF without oscillation, as confirmed in the "Features" and "Application Information" sections of the datasheet. This eliminates the need for additional components in space-constrained designs.
What is the thermal hysteresis specification for LM4050CIM3-2.5/NOPB?
The LM4050CIM3-2.5/NOPB exhibits 0.7 mV thermal hysteresis, defined as the voltage difference measured at 25°C after cycling between −40°C and +125°C. This value is explicitly listed in Table 6.6 (2.5-V Option) under the VHYST parameter and reflects repeatable, non-permanent voltage shift due to thermal stress history.
Can LM4050CIM3-2.5/NOPB be used in automotive applications?
The LM4050CIM3-2.5/NOPB is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. For automotive use, TI offers the LM4050-N-Q1 series (e.g., LM4050CIM3-2.5Q1), which is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and manufactured on an automotive-grade flow - LM4050CIM3-2.5/NOPB itself is not approved for automotive safety-critical systems.
What is the long-term stability of LM4050CIM3-2.5/NOPB after 1000 hours?
The LM4050CIM3-2.5/NOPB has a reverse breakdown voltage long-term stability of 120 ppm after 1000 hours at 25°C and 100 μA operating current, as documented in Table 6.6. This represents a maximum drift of ±0.3 mV from nominal 2.5 V and is consistent across all voltage options and grades in the LM4050-N family.
LM4050CIM3-2.5/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:
- ±0.5%
- 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
LM4050CIM3-2.5/NOPB FAQ
1.How can I place an order for LM4050CIM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIM3-2.5/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 LM4050CIM3-2.5/NOPB reliable?
The price and inventory of LM4050CIM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CIM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050CIM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIM3-2.5/NOPB?
LM4050CIM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIM3-2.5/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 LM4050CIM3-2.5/NOPB?
For technical support, including LM4050CIM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4050CIM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050CIM3-2.5/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 LM4050CIM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050CIM3-2.5/NOPB?
All LM4050CIM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIM3-2.5/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 LM4050CIM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050CIM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050CIM3-2.5/NOPB Tags
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