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Texas Instruments LM4050CIM3X-8.2
- Part No.:
- LM4050CIM3X-8.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CIM3X-8.2.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,530
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Product details
Overview
LM4050CIM3X-8.2 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 8.192 V reverse breakdown voltage with ±0.5% initial tolerance (C grade), 50 ppm/°C max temperature coefficient, and 150 μVrms wideband noise (10 Hz–10 kHz). It operates from 74 μA to 15 mA, supports capacitive loads without external compensation, and targets high-accuracy analog signal conditioning in portable instrumentation.
For engineers reviewing the LM4050CIM3X-8.2 datasheet, LM4050CIM3X-8.2 pinout, LM4050CIM3X-8.2 application, or LM4050CIM3X-8.2 equivalent, key selection criteria include its fixed 8.192 V output, C-grade accuracy for cost-sensitive precision systems, no-output-capacitor operation, thermal hysteresis of 2.3 mV, and compatibility with industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges.
Technical Context
The LM4050CIM3X-8.2 uses bandgap-derived Zener-zap trimmed shunt regulation with curvature-corrected temperature drift compensation, enabling stable 8.192 V reference across −40°C to +125°C. Its dynamic impedance is 0.6 Ω at 1 mA, and it tolerates unlimited capacitive loading due to internal phase compensation.
It requires only cathode and anode connections-pin 3 is NC-and draws as little as 74 μA minimum operating current at 25°C, rising to 100 μA over full temperature range. Reverse breakdown voltage long-term stability is 120 ppm after 1000 hours at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8.192 V nominal reverse breakdown voltage, fixed and non-adjustable |
| Initial Tolerance | ±0.5% at 25°C (C grade), defining worst-case DC error before temperature or load effects |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to +125°C, limiting worst-case drift to ±0.42 V across full range |
| Noise (10 Hz–10 kHz) | 150 μVrms, directly impacting ADC effective resolution and low-level sensor signal fidelity |
| Min Operating Current | 74 μA at 25°C, setting lowest usable bias for ultra-low-power battery systems |
| Dynamic Impedance | 0.6 Ω at 1 mA, determining load regulation error under varying sink current |
| Thermal Hysteresis | 2.3 mV over −40°C ↔ +125°C cycle, contributing to repeatable calibration accuracy |
Pinout & Package
SOT-23 (DBZ) package, 3-pin surface-mount, body size 2.92 mm × 1.30 mm, rated for 280 mW power dissipation at 25°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference voltage node | Connected to regulated voltage rail; sinks all load + reference current; defines 8.192 V at this node |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; forms current path with cathode; no internal connection to substrate |
| NC (Pin 3) | No internal connection | Must be left floating; not bonded; no electrical function or thermal role |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for unconditional stability with any capacitive load, eliminating BOM cost and layout risk |
| Fixed 8.192 V output | Matches binary-scaled 213 mV standard, ideal for 13-bit DAC/ADC full-scale calibration and digital multimeters |
| Wide operating current range | 74 μA to 15 mA enables use from nanoamp sensor biasing to 10+ mA reference buffering |
| Low temperature coefficient | 50 ppm/°C max ensures ≤±0.42 V drift over −40°C to +125°C, critical for unheated field instruments |
| Industrial & extended temp support | Qualified for both −40°C to +85°C (industrial) and −40°C to +125°C (extended) operation without derating |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure over multi-year deployments. IC Role / Device Role / Timing Role: Shunt reference providing excitation and ADC reference for ratiometric sensor measurements. Use Value: 74 μA min current enables >10-year battery life; 150 μVrms noise preserves 16-bit effective resolution in low-frequency acquisition. |
Use Scenario: 4–20 mA loop-powered transmitters converting RTD or strain-gauge signals in factory automation. IC Role / Device Role / Timing Role: Precision 8.192 V reference for sigma-delta ADC front-end and DAC-based current loop control. Use Value: ±0.5% initial tolerance and 50 ppm/°C TC ensure <0.1% total error over full industrial temperature range without calibration. |
| Calibration Equipment | Energy Metering IC Reference |
Use Scenario: Handheld multimeters and benchtop calibrators requiring traceable DC voltage standards. IC Role / Device Role / Timing Role: Primary shunt reference for programmable voltage sources and auto-ranging measurement circuits. Use Value: 2.3 mV thermal hysteresis and 120 ppm long-term stability enable recalibration intervals ≥12 months per ISO/IEC 17025. |
Use Scenario: Polyphase electricity meters using metrology SoCs (e.g., TI MSP430FE427) for revenue-grade kWh measurement. IC Role / Device Role / Timing Role: Stable 8.192 V reference for anti-aliasing filters and ADC reference in Class 0.2 metering designs. Use Value: Fixed 8.192 V matches common 13-bit ADC full scale, minimizing gain error; low noise prevents quantization uncertainty in sub-watt detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3X-8.2 | Higher 100 ppm/°C max TC, 200 μVrms noise, 60 μA min current; no extended-temp option | Limited to lower-accuracy industrial systems where 8.192 V match is needed but drift budget allows ±0.8 V over temperature | Select when cost is primary constraint and ±0.5% tolerance + 50 ppm/°C TC are not required |
| REF5040IDBZR | Series topology, 4.096 V output, 3 ppm/°C TC, 4.8 μVrms noise, requires input capacitor and dropout headroom | Used in high-precision lab equipment where ultra-low noise and drift outweigh board space and supply constraints | Select only if 4.096 V suffices and system can accommodate series regulator architecture and higher quiescent current |
Compared with LM4040CIM3X-8.2, the LM4050CIM3X-8.2 delivers tighter temperature stability and lower noise at modest cost premium; versus REF5040IDBZR, it trades ultra-low drift for shunt simplicity, zero dropout, and direct 8.192 V compatibility-making it optimal for space-constrained, battery-operated, binary-aligned measurement systems.
Availability
LM4050CIM3X-8.2 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and energy metering applications requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050CIM3X-8.2 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 leadership in precision reference design.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-accuracy measurement systems-designed specifically for applications demanding fixed-voltage stability without external compensation.
FAQ
What is the exact output voltage of the LM4050CIM3X-8.2?
The LM4050CIM3X-8.2 provides a nominal reverse breakdown voltage of 8.192 V, verified at 150 μA test current per datasheet Section 6.9. This value is fixed and non-adjustable, matching the binary-scaled 213 mV standard used in high-resolution data converters. The actual voltage falls within ±0.5% of 8.192 V at 25°C for the C-grade device, and remains stable across its full operating current and temperature range.
Does the LM4050CIM3X-8.2 require an external capacitor for stability?
No, the LM4050CIM3X-8.2 does not require an external output capacitor. Its internal compensation ensures unconditional stability with any capacitive load, including large bulk capacitors or long PCB traces. This eliminates layout sensitivity and reduces BOM count-unlike many competing shunt references that mandate minimum capacitance or series resistance to prevent oscillation.
What is the minimum operating current for the LM4050CIM3X-8.2 over temperature?
The LM4050CIM3X-8.2 requires a minimum operating current of 74 μA at 25°C, increasing to 100 μA across the full extended temperature range (−40°C to +125°C), as specified in Section 6.9 of the datasheet. Below this threshold, regulation degrades and output voltage deviates beyond specification limits-critical for ultra-low-power sleep-mode operation in battery-powered devices.
How does the LM4050CIM3X-8.2 compare to the LM4050AIM3X-8.2?
The LM4050CIM3X-8.2 and LM4050AIM3X-8.2 share identical 8.192 V nominal output and SOT-23 package, but differ in initial accuracy: the 'C' grade has ±0.5% tolerance at 25°C, while the 'A' grade offers ±0.1%. Both exhibit the same 50 ppm/°C max temperature coefficient and 150 μVrms noise. The C-grade is selected for cost-sensitive applications where tighter initial tolerance is unnecessary.
Is the LM4050CIM3X-8.2 qualified for automotive applications?
No, the LM4050CIM3X-8.2 is not AEC-Q100 qualified. It belongs to the industrial-grade LM4050-N family. For automotive use, TI offers the LM4050-N-Q1 series (e.g., LM4050CIM3X-8.2Q1), which is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and manufactured on an automotive-grade flow-distinct part numbers with separate qualification documentation.
LM4050CIM3X-8.2 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):
- 8.192V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 150µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 95 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050CIM3X-8.2 FAQ
1.How can I place an order for LM4050CIM3X-8.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIM3X-8.2 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-8.2 reliable?
The price and inventory of LM4050CIM3X-8.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CIM3X-8.2 is usually 5 days.
3.What payment methods are accepted for LM4050CIM3X-8.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIM3X-8.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIM3X-8.2?
LM4050CIM3X-8.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIM3X-8.2 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-8.2?
For technical support, including LM4050CIM3X-8.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIM3X-8.2 requirements.
6.How does Aetrix verify that LM4050CIM3X-8.2 is sourced from the original manufacturer or authorized distributors?
All LM4050CIM3X-8.2 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-8.2 meets industry standards.
7.What is the process for return or replacement of LM4050CIM3X-8.2?
All LM4050CIM3X-8.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIM3X-8.2, 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-8.2 part is unused and in its original packaging.
Return procedure for LM4050CIM3X-8.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050CIM3X-8.2 Tags
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