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Texas Instruments LM4040D50IDCKR
- Part No.:
- LM4040D50IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4040D50IDCKR.pdf
- Description:
- IC VREF SHUNT 1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,337
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Product details
Overview
LM4040D50IDCKR from Texas Instruments is a precision micropower shunt voltage reference with 5.0V nominal output, ±1.0% initial accuracy (D grade), 150ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation from 45μA to 15mA cathode current. It serves as a compact, low-noise voltage reference in analog signal chains for industrial sensors and portable data-acquisition systems.
For engineers reviewing the LM4040D50IDCKR datasheet, LM4040D50IDCKR pinout, LM4040D50IDCKR application, or LM4040D50IDCKR equivalent, key selection considerations include its SC-70-5 package, –40°C to 85°C operating range, no-output-capacitor requirement, and compatibility with high-impedance or capacitive-load circuits.
Technical Context
The LM4040D50IDCKR operates as a two-terminal shunt reference, sinking cathode current (IZ) to maintain a precise 5.0V reverse breakdown voltage across its terminals. Its Zener-zap trimmed silicon design achieves D-grade tolerance (±1.0% at 25°C) and supports stable regulation over 45μA–15mA IZ without external compensation.
It features low dynamic impedance (≤1.1Ω at 1mA), thermal hysteresis of 0.08%, and long-term stability of 120ppm after 1000 hours. The device is characterized for industrial temperature range (–40°C to 85°C) and requires no output capacitor - enabling direct use in space-constrained, low-power analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V nominal; ±25mV (±1.0%) tolerance at 25°C ensures predictable ADC/DAC biasing in mid-range precision systems. |
| Temperature Coefficient | 150ppm/°C max; contributes ≤±0.75V drift over –40°C to 85°C ambient, suitable for non-critical industrial environments. |
| Cathode Current Range | 45μA to 15mA; enables ultra-low-power sensor biasing and robust operation across varying load conditions. |
| Wideband Noise | 35μVRMS (10Hz–10kHz); minimizes added noise in high-resolution 16-bit+ data converters. |
| Dynamic Impedance | ≤1.1Ω at 1mA; maintains tight regulation despite rapid load transients in feedback-controlled power supplies. |
| Thermal Hysteresis | 0.08%; limits repeatability error after thermal cycling - critical for calibration-critical instrumentation. |
Pinout & Package
LM4040D50IDCKR is packaged in a 5-pin SC-70 (DCK) surface-mount package measuring 2.00mm × 1.25mm. Pin 1 is Anode (ground reference), Pin 2 is Cathode (voltage output), Pin 3 is NC (no internal connection), Pins 4 and 5 are NC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Common terminal; must be connected to system ground or low-impedance return path for stable reference operation. |
| 2 | Cathode | Shunt output node; sinks current to regulate 5.0V across external load/resistor network. |
| 3, 4, 5 | No Connection (NC) | Unused pins; electrically isolated - may be left floating or tied to ground per layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V output | Eliminates external resistor networks and trimming, reducing BOM count and layout complexity in voltage-reference designs. |
| No output capacitor required | Enables direct integration into high-impedance nodes (e.g., op-amp inputs, ADC references) without stability concerns. |
| Stable with all capacitive loads | Supports direct connection to sampling capacitors or noisy digital domains without phase-margin degradation. |
| Low 35μVRMS noise | Preserves SNR in precision measurement paths - especially beneficial for 16-bit SAR and delta-sigma ADCs. |
| 45μA minimum operating current | Permits use in battery-powered field transmitters and IoT sensor nodes where quiescent current is tightly constrained. |
Applications
| Industrial Sensor Signal Conditioning | Portable Data-Acquisition Front-End |
|---|---|
Use Scenario: High-accuracy temperature and pressure transducers feeding 16-bit ADCs in factory-floor monitoring units. IC Role / Device Role / Timing Role: Provides stable 5.0V reference for ADC full-scale calibration and ratiometric sensor excitation. Use Value: ±1.0% initial accuracy and 150ppm/°C TC ensure <±0.5% total reference error across –25°C to 70°C operating envelope. |
Use Scenario: Handheld multimeters and portable oscilloscope probes requiring low-power, high-stability analog references. IC Role / Device Role / Timing Role: Serves as primary voltage reference for dual-slope or sigma-delta ADCs powered by coin-cell batteries. Use Value: 45μA min current enables >1-year battery life while 35μVRMS noise preserves 100dB+ effective resolution. |
| Energy Infrastructure Metering | Automotive Body Control Module Sensors |
Use Scenario: Revenue-grade electricity meters measuring voltage/current with metrology-grade ADCs under variable grid temperatures. IC Role / Device Role / Timing Role: Supplies reference voltage for isolation-amplifier outputs and anti-aliasing filter biasing. Use Value: Thermal hysteresis of 0.08% prevents calibration drift after repeated thermal cycling during outdoor installation. |
Use Scenario: Cabin air quality and humidity sensors in automotive BCMs operating across –40°C to 85°C ambient. IC Role / Device Role / Timing Role: References analog front-end amplifiers and ADCs in low-voltage (5V rail) sensor subsystems. Use Value: SC-70-5 footprint saves PCB area in dense multi-sensor modules; no capacitor simplifies layout near EMI sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C50IDCKR | 0.5% initial accuracy, 100ppm/°C TC - tighter tolerance and lower drift than LM4040D50IDCKR. | Better suited for higher-accuracy industrial control loops where long-term stability is prioritized over cost. | Select when reference error budget demands <±0.3% total uncertainty over temperature and time. |
| TLVH431ACDBVR | Adjustable 1.24V–18V output, 0.5% accuracy, 90ppm/°C TC, 3-pin SOT-23 package. | Requires external resistors for 5V setting; offers flexibility but adds component count and layout sensitivity. | Choose if future designs require multiple reference voltages or programmable thresholds within same platform. |
Compared with LM4040C50IDCKR and TLVH431ACDBVR, the LM4040D50IDCKR trades tighter accuracy for lower cost and zero external components - making it optimal for cost-sensitive, fixed-5V applications where ±1.0% tolerance is acceptable.
Availability
LM4040D50IDCKR is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, portable data-acquisition front-ends, energy infrastructure metering, and automotive body control module sensors requiring stable component supply and consistent parametric performance.
Supply support for LM4040D50IDCKR 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 and embedded processing technologies, with decades of expertise in precision reference design and high-volume manufacturing.
The LM4040 series was engineered for cost-effective, space-efficient shunt reference applications in industrial, automotive, and portable electronics - emphasizing micropower operation, low noise, and robust capacitive-load stability.
FAQ
What is the operating temperature range for LM4040D50IDCKR?
The LM4040D50IDCKR is specified for industrial temperature range: –40°C to +85°C ambient. It is not rated for extended temperature operation (–40°C to +125°C), which applies only to Q-grade variants like LM4040D50QDCKR. This range supports deployment in most factory automation and consumer-grade portable equipment.
Does LM4040D50IDCKR require an output capacitor?
No, LM4040D50IDCKR does not require an output capacitor and remains stable with all capacitive loads - including direct connection to ADC reference inputs or sampling capacitors. This eliminates a common source of layout-induced drift and simplifies design for high-impedance analog nodes.
What is the minimum cathode current needed for LM4040D50IDCKR to regulate properly?
The LM4040D50IDCKR requires a minimum cathode current of 45μA (typical) at 25°C to maintain regulation. At full temperature range (–40°C to +85°C), the guaranteed minimum is 80μA. Designers must ensure the external current-setting resistor delivers ≥80μA across worst-case VIN and temperature.
How does the noise performance of LM4040D50IDCKR impact ADC accuracy?
With 35μVRMS wideband noise (10Hz–10kHz), LM4040D50IDCKR contributes <0.1 LSB error to a 5V-full-scale 16-bit ADC (LSB = 76.3μV). This enables effective resolution >15.5 bits in well-filtered systems - sufficient for most industrial and portable measurement applications.
Can LM4040D50IDCKR be used in place of LM4040C50IDCKR?
Yes, LM4040D50IDCKR is a functional drop-in replacement for LM4040C50IDCKR in the same SC-70-5 package, but with relaxed specifications: ±1.0% vs. ±0.5% initial accuracy and 150ppm/°C vs. 100ppm/°C temperature coefficient. System-level validation is recommended if reference error budget is tight.
LM4040D50IDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 95 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LM4040D50IDCKR FAQ
1.How can I place an order for LM4040D50IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040D50IDCKR 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 LM4040D50IDCKR reliable?
The price and inventory of LM4040D50IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D50IDCKR is usually 5 days.
3.What payment methods are accepted for LM4040D50IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040D50IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040D50IDCKR?
LM4040D50IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040D50IDCKR 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 LM4040D50IDCKR?
For technical support, including LM4040D50IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D50IDCKR requirements.
6.How does Aetrix verify that LM4040D50IDCKR is sourced from the original manufacturer or authorized distributors?
All LM4040D50IDCKR 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 LM4040D50IDCKR meets industry standards.
7.What is the process for return or replacement of LM4040D50IDCKR?
All LM4040D50IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D50IDCKR, 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 LM4040D50IDCKR part is unused and in its original packaging.
Return procedure for LM4040D50IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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