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Texas Instruments LM4040DIM3-5.0
- Part No.:
- LM4040DIM3-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DIM3-5.0.pdf
- Description:
- LM4040-N 100-PPM/C PRECISION MIC
- Quantity:
- Payment:
- Shipping:
Inventory:47,920
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Product details
Overview
LM4040DIM3-5.0 from Micrel is a precision micropower shunt voltage reference with fixed 5.000 V reverse breakdown voltage, ±1.0% initial tolerance, 150 ppm/°C max temperature coefficient, and 74 µA minimum operating current in SOT-23 package. It delivers stable reference accuracy for low-power analog signal conditioning in portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the LM4040DIM3-5.0 datasheet, LM4040DIM3-5.0 pinout, LM4040DIM3-5.0 application, or LM4040DIM3-5.0 equivalent, key selection considerations include its 5.000 V output tolerance over –40°C to +85°C, dynamic impedance of 1.1 Ω max at 1 mA, wide 74 µA–15 mA operating current range, and compatibility with capacitive loads without external compensation.
Technical Context
The LM4040DIM3-5.0 implements bandgap-based curvature-corrected shunt regulation, enabling stable 5.000 V reference voltage across industrial temperature range and varying load currents. Its internal architecture eliminates need for output capacitor while tolerating up to 10 nF bypass capacitance.
It operates as a two-terminal device: cathode (pin 1) and anode (pin 2), with pin 3 floating or tied to pin 2 per datasheet requirement. Reverse dynamic impedance remains ≤1.1 Ω at 1 mA, supporting low-noise performance (80 µVRMS, 10 Hz–10 kHz) and long-term stability of 120 ppm over 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V nominal; enables precise ADC/DAC biasing and sensor excitation at standard logic rail |
| Initial Tolerance | ±1.0% (±50 mV); defines worst-case DC error before temperature or aging effects |
| Temp Coefficient | 150 ppm/°C max; contributes ≤±9.75 mV drift over –40°C to +85°C ambient |
| Min Operating Current | 74 µA max; ensures regulation starts reliably even in ultra-low-power sleep modes |
| Max Operating Current | 15 mA; sets upper limit for series resistor sizing in shunt regulator configurations |
| Dynamic Impedance | 1.1 Ω max at 1 mA; maintains output stability under fast load transients |
| Wideband Noise | 80 µVRMS (10 Hz–10 kHz); suitable for 12-bit precision measurement front-ends |
Pinout & Package
SOT-23 (M3) surface-mount package: 3 mm × 1.3 mm footprint, 1.45 mm height, gull-wing leads. Pin 3 must float or be connected to pin 2; not used as functional terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Cathode) | Reference Output / High-Side Terminal | Connected to regulated 5.000 V node; sinks current from external series resistor |
| Pin 2 (Anode) | Reference Ground / Low-Side Terminal | Return path for reference current; forms reference potential with pin 1 |
| Pin 3 | Die Attach Interface | Must float or tie to pin 2; no electrical function in LM4040 fixed-voltage variants |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained PCB layouts without stability-compensation components |
| Tolerates capacitive loads | Stable with 10 nF bypass cap; avoids oscillation in noisy supply environments |
| Low dynamic impedance | ≤1.1 Ω at 1 mA supports <10 µs transient recovery in precision feedback loops |
| Micropower operation | 74 µA min start-up current allows use in 10 µA standby systems |
| Industrial temperature range | –40°C to +85°C operation validated; supports deployment in uncontrolled enclosures |
Applications
| Battery-Powered Instrumentation | Data Acquisition Front-End |
|---|---|
Use Scenario: Portable multimeter with 16-bit SAR ADC and lithium coin-cell power source. IC Role / Device Role / Timing Role: Shunt reference providing stable 5.000 V reference for ADC full-scale calibration and sensor excitation. Use Value: ±1.0% initial tolerance and 150 ppm/°C TC ensure <0.2% total reference error across operating temperature, meeting Class II meter accuracy requirements. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA loop signals. IC Role / Device Role / Timing Role: Precision voltage reference for op-amp gain-setting and ADC reference in isolated signal chain. Use Value: 74 µA minimum operating current enables low-quiescent design; 15 mA max rating supports robust fault-current margin during overvoltage events. |
| Energy Management Sensor Node | Precision Audio Biasing |
Use Scenario: Wireless smart-meter sub-GHz RF node monitoring voltage/current harmonics. IC Role / Device Role / Timing Role: Reference source for anti-aliasing filter cutoff tuning and ADC reference in ultra-low-duty-cycle sampling. Use Value: 80 µVRMS wideband noise prevents quantization dither in high-resolution RMS calculations; SOT-23 footprint minimizes board area. |
Use Scenario: High-fidelity headphone amplifier with discrete Class-A output stage. IC Role / Device Role / Timing Role: Stable bias reference for op-amp offset nulling and VBE multiplier circuits. Use Value: Low 1.1 Ω dynamic impedance suppresses supply-induced distortion; ±1.0% tolerance ensures consistent channel matching across stereo pairs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C50IDBZR | 5.0 V, ±0.5% initial tolerance, 50 ppm/°C TC, 70 µA min current, SOT-23 | Higher accuracy and lower TC; requires tighter layout control for thermal stability | Select when system-level accuracy budget demands <±0.1% total reference error over temperature |
| MAX6008AEUR+T | 5.0 V, ±1.0% tolerance, 100 ppm/°C TC, 60 µA min current, SOT-23 | Lower TC than LM4040DIM3-5.0 but higher min current spec; optimized for low-drift designs | Prefer for battery-operated systems needing reduced drift contribution below 100 ppm/°C |
Compared with TL4050C50IDBZR and MAX6008AEUR+T, the LM4040DIM3-5.0 offers best-in-class micropower start-up (74 µA max) and proven robustness with capacitive loads, making it optimal for cost-sensitive, space-constrained industrial sensors where ±1.0% tolerance is acceptable.
Availability
LM4040DIM3-5.0 is available at Aetrix Electronics and suitable for battery-powered equipment, data acquisition systems, and process control applications requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4040DIM3-5.0 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
Micrel, Inc. was a U.S.-based semiconductor company specializing in analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015.
The LM4040 series was designed as a family of micropower shunt references targeting portable instrumentation, sensor interfaces, and industrial measurement systems where size, accuracy, and low quiescent current are critical.
FAQ
What is the maximum operating current for LM4040DIM3-5.0?
The LM4040DIM3-5.0 has a maximum operating current of 15 mA, as specified in the Absolute Maximum Ratings and confirmed in the Electrical Characteristics table. Exceeding this current risks thermal overstress and parametric degradation. Designers must size the series resistor to ensure current stays within 74 µA–15 mA across all operating conditions, including worst-case supply voltage and load variations.
Does LM4040DIM3-5.0 require an output capacitor?
No, the LM4040DIM3-5.0 does not require an output capacitor for stability - a key feature highlighted in its datasheet. However, it tolerates capacitive loads only up to 10 nF; values between 100 pF and 10 nF may cause instability. For bypassing, a 10 nF ceramic capacitor placed directly across pins 1 and 2 is recommended to suppress high-frequency noise without compromising regulation.
What is the temperature coefficient of LM4040DIM3-5.0?
The LM4040DIM3-5.0 has a maximum average temperature coefficient of 150 ppm/°C over the industrial range (–40°C to +85°C), measured at IR = 1 mA. This means its 5.000 V output may drift up to ±7.5 mV across the full temperature span, contributing predictable, bounded error in precision analog circuits where thermal gradients are managed.
Can pin 3 of LM4040DIM3-5.0 be left unconnected?
Yes - pin 3 of the LM4040DIM3-5.0 must either float or be connected to pin 2 (anode). It serves only as a die attach interface with no active circuit function in fixed-voltage LM4040 variants. Leaving it unconnected is fully compliant with Micrel's application guidance and avoids unintended parasitic paths that could affect regulation accuracy or ESD robustness.
What is the long-term stability specification for LM4040DIM3-5.0?
The LM4040DIM3-5.0 exhibits 120 ppm long-term stability after 1000 hours of operation at 25°C ±0.1°C with IR = 100 µA. This represents a maximum output voltage shift of ±0.6 mV over time, supporting reliability in field-deployed instrumentation and energy metering applications where calibration intervals exceed one year.
LM4040DIM3-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- 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:
- 85 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DIM3-5.0 FAQ
1.How can I place an order for LM4040DIM3-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIM3-5.0 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 LM4040DIM3-5.0 reliable?
The price and inventory of LM4040DIM3-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DIM3-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040DIM3-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIM3-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIM3-5.0?
LM4040DIM3-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIM3-5.0 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 LM4040DIM3-5.0?
For technical support, including LM4040DIM3-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIM3-5.0 requirements.
6.How does Aetrix verify that LM4040DIM3-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040DIM3-5.0 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 LM4040DIM3-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040DIM3-5.0?
All LM4040DIM3-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIM3-5.0, 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 LM4040DIM3-5.0 part is unused and in its original packaging.
Return procedure for LM4040DIM3-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DIM3-5.0 Tags
-
TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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