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Texas Instruments LM4050CIM3X-2.5/NOPB
- Part No.:
- LM4050CIM3X-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CIM3X-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,856
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Product details
Overview
LM4050CIM3X-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 LM4050CIM3X-2.5/NOPB datasheet, LM4050CIM3X-2.5/NOPB pinout, LM4050CIM3X-2.5/NOPB application, or LM4050CIM3X-2.5/NOPB equivalent, this device serves as a space-constrained, low-noise, high-stability reference for portable instrumentation, battery-powered data acquisition, and precision analog signal conditioning where tight voltage accuracy and minimal quiescent current are critical.
Technical Context
The LM4050CIM3X-2.5/NOPB employs bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its dynamic impedance remains ≤0.3 Ω at 1 mA, enabling stable regulation under varying load currents from 65 μA to 15 mA.
It achieves ±13 mV (C-grade) initial accuracy at 25°C and maintains ≤±21 mV total tolerance across −40°C to 85°C industrial range, with thermal hysteresis of only 0.7 mV after cycling between −40°C and 125°C. No external capacitor is needed-stability is guaranteed with any capacitive load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal reverse breakdown voltage - sets precise bias/reference point for ADCs, DACs, and comparators |
| Initial Tolerance (25°C) | ±13 mV (±0.5%) - enables single-point calibration in mid-accuracy systems without trimming |
| Temp Coefficient | ≤50 ppm/°C - ensures <±0.21 mV drift over −40°C to 85°C, critical for unheated field instruments |
| Operating Current Range | 65 μA to 15 mA - supports ultra-low-power sensor nodes and high-current analog front-ends |
| Wideband Noise (10 Hz–10 kHz) | 41 μVrms - minimizes added noise in 16-bit+ data acquisition systems |
| Dynamic Impedance | 0.3 Ω at 1 mA - provides tight load regulation (<6 mV change from 1 mA to 15 mA) |
| Long-Term Stability | 120 ppm (1000 hrs) - ensures reference integrity over multi-year product lifetimes |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage reference node | Connects to regulated supply rail; sinks all current not drawn by load - defines reference potential |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; establishes 0 V reference for cathode voltage |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no routing or soldering required - avoids unintended parasitics |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Guaranteed stability with any capacitive load - eliminates BOM cost and layout area for bulk capacitance |
| Tolerates capacitive loads | Stable operation up to ≥10 μF - supports direct buffering into ADC sample-and-hold or op-amp inputs |
| Fixed 2.5 V breakdown | Matches common SAR ADC reference rails and microcontroller VREF inputs without scaling resistors |
| Low 65 μA minimum current | Enables operation in sub-100 μA sleep modes - ideal for battery life extension in IoT endpoints |
| SOT-23 footprint | 3 mm × 1.3 mm area - fits dense PCB layouts in handheld medical or portable test equipment |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and lithium coin-cell power. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V for ADC full-scale range and internal DAC calibration. Use Value: ±13 mV initial tolerance and 50 ppm/°C drift ensure <0.05% measurement error across operating temperature without firmware compensation. |
Use Scenario: Industrial sensor node logging temperature/pressure via 12-bit SAR ADC. IC Role / Device Role / Timing Role: Precision voltage reference for ADC reference input and analog front-end biasing. Use Value: 41 μVrms noise and 0.3 Ω dynamic impedance prevent reference-induced quantization noise and maintain ENOB >11.5 bits. |
| Energy Management | Precision Audio Components |
Use Scenario: Smart meter monitoring AC mains voltage and current with isolated ADCs. IC Role / Device Role / Timing Role: Primary shunt reference for isolated voltage sensing channel and metrology IC biasing. Use Value: 120 ppm long-term stability ensures calibration validity over 10-year utility deployment without field recalibration. |
Use Scenario: High-fidelity audio DAC requiring ultra-low-noise analog supply reference. IC Role / Device Role / Timing Role: Low-noise 2.5 V reference for DAC internal voltage scaling and headphone amplifier bias. Use Value: 41 μVrms noise floor prevents audible hiss; SOT-23 placement near DAC minimizes PCB trace inductance coupling. |
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% tolerance, SOT-23, but higher 74 μA min current and 55 μVrms noise | Less suitable for ultra-low-power sleep modes; acceptable where noise margin >14 μVrms exists | Prefer LM4050CIM3X-2.5/NOPB when minimizing quiescent current or noise is primary |
| MAX6008AEUR+T | 2.5 V, ±0.2% (A-grade), but SOT-23-5 package with enable pin and 1.2 μA typical quiescent current | Requires additional control logic; optimized for on/off sequencing, not continuous low-noise operation | Choose MAX6008AEUR+T only if system-level power gating is mandatory and tighter initial accuracy justifies extra pin and complexity |
Compared with TL4050C25IDBZR and MAX6008AEUR+T, the LM4050CIM3X-2.5/NOPB uniquely balances ultra-low minimum current (65 μA), industry-leading noise (41 μVrms), and compact 3-pin SOT-23 packaging - making it optimal for always-on, space-constrained, high-accuracy analog systems without enable functionality.
Availability
LM4050CIM3X-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, energy management systems, and precision data acquisition requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM4050CIM3X-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 connectivity technologies, with decades of expertise in precision analog design and automotive-grade reliability.
The LM4050-N series was engineered specifically for space-constrained, battery-operated, and industrial measurement applications demanding high initial accuracy, low drift, and robust capacitive-load stability - without external compensation components.
FAQ
What is the minimum operating current for LM4050CIM3X-2.5/NOPB?
The LM4050CIM3X-2.5/NOPB requires a minimum operating current of 65 μA across its industrial temperature range (−40°C to 85°C). At 25°C, the typical minimum is 60 μA. This low current enables use in ultra-low-power applications such as battery-backed sensors and sleep-mode circuits where current budgets are sub-100 μA. The LM4050CIM3X-2.5/NOPB will not regulate properly below this threshold.
Does LM4050CIM3X-2.5/NOPB require an external output capacitor?
No, the LM4050CIM3X-2.5/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load - including direct connection to ADC input capacitors or op-amp feedback networks up to 10 μF. This eliminates BOM cost, board area, and potential phase-margin issues associated with external capacitor selection. The LM4050CIM3X-2.5/NOPB achieves this via proprietary dynamic impedance control and curvature-compensated bandgap topology.
What is the temperature coefficient specification for LM4050CIM3X-2.5/NOPB?
The LM4050CIM3X-2.5/NOPB has a maximum average temperature coefficient of 50 ppm/°C over the −40°C to 85°C industrial temperature range. At 25°C, the typical coefficient is ±15 ppm/°C. This translates to a worst-case drift of ±21 mV across the full temperature range - critical for maintaining accuracy in unheated field instruments. The LM4050CIM3X-2.5/NOPB achieves this via integrated temperature drift curvature correction.
How does the LM4050CIM3X-2.5/NOPB differ from the A-grade or B-grade variants?
The LM4050CIM3X-2.5/NOPB is the C-grade variant, offering ±0.5% (±13 mV) initial tolerance at 25°C, versus ±0.1% (±2.5 mV) for A-grade and ±0.2% (±5 mV) for B-grade. All grades share identical package, temperature range, noise (41 μVrms), dynamic impedance (0.3 Ω), and operating current range. The LM4050CIM3X-2.5/NOPB is selected when cost-sensitive designs can tolerate wider initial accuracy but still require low drift and low noise.
What is the long-term stability of LM4050CIM3X-2.5/NOPB?
The LM4050CIM3X-2.5/NOPB exhibits 120 ppm reverse breakdown voltage shift after 1000 hours of operation at 25°C and 100 μA bias current. This equates to approximately ±0.3 mV drift over one year of continuous operation - supporting multi-year calibration validity in industrial and energy metering applications. The LM4050CIM3X-2.5/NOPB achieves this through wafer-level Zener-zap trimming and stable passivation processes.
LM4050CIM3X-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
LM4050CIM3X-2.5/NOPB FAQ
1.How can I place an order for LM4050CIM3X-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIM3X-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 LM4050CIM3X-2.5/NOPB reliable?
The price and inventory of LM4050CIM3X-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 LM4050CIM3X-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050CIM3X-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIM3X-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIM3X-2.5/NOPB?
LM4050CIM3X-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIM3X-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 LM4050CIM3X-2.5/NOPB?
For technical support, including LM4050CIM3X-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIM3X-2.5/NOPB requirements.
6.How does Aetrix verify that LM4050CIM3X-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050CIM3X-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 LM4050CIM3X-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050CIM3X-2.5/NOPB?
All LM4050CIM3X-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIM3X-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 LM4050CIM3X-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050CIM3X-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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