My Inquiry
My Account
Texas Instruments LM4050CIM3X-2.5
- Part No.:
- LM4050CIM3X-2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CIM3X-2.5.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,395
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4050CIM3X-2.5 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 datasheet, LM4050CIM3X-2.5 pinout, LM4050CIM3X-2.5 application, or LM4050CIM3X-2.5 equivalent, this device serves as a space-constrained, low-noise, high-stability reference for ADC/DAC biasing, portable instrumentation, and battery-powered data acquisition where tight voltage accuracy and minimal quiescent current are critical.
Technical Context
The LM4050CIM3X-2.5 uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation. Its dynamic impedance is 0.3 Ω at 1 mA, enabling stable regulation under varying load currents from 65 μA to 15 mA.
It achieves ±13 mV total output voltage tolerance over −40°C to 85°C industrial range via fuse-trimmed wafer-sort calibration and exhibits 0.7 mV thermal hysteresis after cycling between −40°C and 125°C - confirming robust repeatability in cyclic thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; fixed reverse breakdown voltage for precision biasing of analog signal chains |
| Initial Tolerance (25°C) | ±13 mV (±0.5%); C-grade specification ensures cost-optimized accuracy for non-critical reference applications |
| Tempco (−40°C to 85°C) | 50 ppm/°C max; guarantees ≤±8.125 mV drift over full industrial range, enabling stable performance without external compensation |
| Operating Current Range | 65 μA to 15 mA; supports ultra-low-power sensor nodes and high-current DAC references in same footprint |
| Wideband Noise (10 Hz–10 kHz) | 41 μVrms; low enough to avoid degrading 16-bit ADC ENOB in precision measurement front-ends |
| Dynamic Impedance | 0.3 Ω at 1 mA; minimizes load-induced voltage shift during transient current demands |
| Long-Term Stability | 120 ppm (1000 hrs); predictable aging behavior supports calibration interval planning in test equipment |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178 compatible. Anode (Pin 2) connects to system ground; Cathode (Pin 1) carries shunt current and sets reference node; Pin 3 is NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current path & reference output node | Connects to regulated 2.5 V node; sinks all excess current from series resistor to maintain precise voltage |
| Anode (Pin 2) | Common return / ground reference | Must be tied directly to system ground plane; forms reference potential for cathode voltage |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or solder required - avoids unintended parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with any capacitive load up to 10 μF eliminates BOM cost and layout area for external stabilization |
| Tolerates capacitive loads | Guaranteed stability with >1 nF to 10 μF output capacitance enables direct interface to ADC input caps and op-amp feedback networks |
| Fixed 2.5 V breakdown | Matches common SAR ADC reference inputs and microcontroller VREF pins without scaling resistors |
| Low 41 μVrms noise | Preserves SNR in 16-bit data acquisition systems where reference noise dominates quantization error |
| 65 μA minimum operating current | Enables use in coin-cell-powered devices with multi-year battery life when paired with high-value series resistor |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and lithium coin-cell power supply. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.5 V reference for ADC conversion and analog front-end gain calibration. Use Value: 65 μA min current and 41 μVrms noise enable >100 kSPS sampling with <0.001% linearity error and >10-year battery life. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA sensor signals with 24-bit resolution. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifier and successive-approximation ADC. Use Value: 50 ppm/°C tempco and ±13 mV tolerance ensure <±0.01% full-scale error across −40°C to 85°C ambient without recalibration. |
| Energy Management Monitoring | Precision Audio Components |
Use Scenario: Smart electricity meter with isolated current sensing and metrology-grade energy calculation. IC Role / Device Role / Timing Role: Reference source for anti-aliasing filter op-amps and metrology ADC biasing in Class 0.2 metering ICs. Use Value: 120 ppm long-term stability supports 10-year metrology certification validity without field recalibration. |
Use Scenario: High-fidelity DAC output stage requiring ultra-low-noise DC bias for I/V conversion op-amps. IC Role / Device Role / Timing Role: Low-noise 2.5 V reference for dual-supply op-amp virtual ground and DAC reference buffer. Use Value: 41 μVrms noise contributes <−108 dBu THD+N floor, preserving dynamic range in 24-bit audio playback 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 |
|---|---|---|---|
| TL431CDBZR | 2.5 V adjustable shunt; 2% initial tolerance; 500 mV typical cathode-anode voltage drop; requires external resistor network | Higher power dissipation and lower accuracy limit use in precision metrology or low-voltage battery systems | Select when cost sensitivity outweighs accuracy needs and board space allows resistor network |
| REF3025AIDBZR | 2.5 V series reference; 0.2% initial tolerance; 50 ppm/°C tempco; 50 μA quiescent current; requires 1 μF output cap | Higher accuracy but larger solution size and mandatory capacitor reduce suitability for ultra-miniature or capacitor-free designs | Select when tighter initial tolerance is mandatory and SOT-23-5 footprint and external cap are acceptable |
Compared with TL431CDBZR, LM4050CIM3X-2.5 delivers 20× tighter initial tolerance and zero external components; compared with REF3025AIDBZR, it eliminates output capacitance and saves one PCB pad while trading 0.3% absolute accuracy for proven stability in space-constrained shunt configurations.
Availability
LM4050CIM3X-2.5 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management monitoring requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle continuity.
Supply support for LM4050CIM3X-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 digital signal technologies, with decades of leadership in precision reference design.
The LM4050-N family was engineered for space-constrained, micropower applications demanding high initial accuracy, low noise, and wide operating current range - targeting portable test equipment, industrial sensors, and battery-operated measurement systems.
FAQ
What is the maximum operating current for LM4050CIM3X-2.5?
The LM4050CIM3X-2.5 supports a maximum operating current of 15 mA, as specified in the Absolute Maximum Ratings table. This allows it to drive higher-current loads such as op-amp bias networks or multiple parallel ADC references without derating, provided power dissipation remains within the 280 mW limit at 25°C ambient.
Does LM4050CIM3X-2.5 require an external capacitor for stability?
No, the LM4050CIM3X-2.5 does not require an external output capacitor. Its internal design ensures stability with any capacitive load from 0 to 10 μF, eliminating the need for external stabilization components and simplifying layout in space-constrained applications.
What is the temperature coefficient specification for LM4050CIM3X-2.5 over −40°C to 85°C?
The LM4050CIM3X-2.5 has a maximum temperature coefficient of 50 ppm/°C over the −40°C to 85°C industrial temperature range. This translates to a worst-case voltage drift of ±8.125 mV across the full range, ensuring predictable performance in uncontrolled ambient environments.
How does the LM4050CIM3X-2.5 differ from the A-grade or B-grade versions of the same part number?
The 'C' in LM4050CIM3X-2.5 denotes the ±0.5% initial tolerance grade (±13 mV at 25°C), versus ±0.1% (±2.5 mV) for A-grade and ±0.2% (±5 mV) for B-grade. All grades share identical pinout, package, tempco, noise, and operating current specs - only initial accuracy and associated test screening differ.
Is LM4050CIM3X-2.5 qualified for automotive applications?
No, LM4050CIM3X-2.5 is not automotive-qualified. It belongs to the industrial-grade LM4050-N series. For automotive use, TI offers the LM4050-N-Q1 variant (e.g., LM4050CIM3X-2.5Q1), which is AEC-Q100 Grade 1 qualified and manufactured on an automotive-grade flow.
LM4050CIM3X-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:
- ±0.5%
- 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 FAQ
1.How can I place an order for LM4050CIM3X-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIM3X-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 LM4050CIM3X-2.5 reliable?
The price and inventory of LM4050CIM3X-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 LM4050CIM3X-2.5 is usually 5 days.
3.What payment methods are accepted for LM4050CIM3X-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIM3X-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIM3X-2.5?
LM4050CIM3X-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIM3X-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 LM4050CIM3X-2.5?
For technical support, including LM4050CIM3X-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIM3X-2.5 requirements.
6.How does Aetrix verify that LM4050CIM3X-2.5 is sourced from the original manufacturer or authorized distributors?
All LM4050CIM3X-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 LM4050CIM3X-2.5 meets industry standards.
7.What is the process for return or replacement of LM4050CIM3X-2.5?
All LM4050CIM3X-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIM3X-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 LM4050CIM3X-2.5 part is unused and in its original packaging.
Return procedure for LM4050CIM3X-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050CIM3X-2.5 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
