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Texas Instruments LM4040C10IDBZR
- Part No.:
- LM4040C10IDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040C10IDBZR.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,087
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Product details
Overview
LM4040C10IDBZR from Texas Instruments is a precision 10V shunt voltage reference in SOT-23-3 (DBZ) package, delivering ±0.5% initial accuracy, 100ppm/°C temperature coefficient, 35μVRMS wideband noise, stable operation from 45μA to 15mA cathode current, and rated for –40°C to 85°C ambient. It serves as a stable voltage reference in analog-to-digital converters and sensor signal conditioning circuits.
For engineers reviewing the LM4040C10IDBZR datasheet, LM4040C10IDBZR pinout, LM4040C10IDBZR application, or LM4040C10IDBZR equivalent, key selection criteria include output tolerance over temperature, low-noise performance at microamp bias, stability with capacitive loads, and compatibility with space-constrained PCB layouts requiring SOT-23 footprint.
Technical Context
The LM4040C10IDBZR operates as a two-terminal shunt reference, sinking cathode current (IZ) to maintain a precise 10V reverse breakdown voltage (VZ) across its terminals. Its Zener-zap trimmed bandgap architecture achieves tight initial tolerance and low thermal drift without external components.
It exhibits low dynamic impedance (≤0.9Ω at 1mA), supports wide operating current (45μA–15mA), and remains stable with all capacitive loads-eliminating need for output capacitance. Thermal hysteresis is limited to 0.08%, and long-term stability is 120ppm after 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10V nominal reverse breakdown voltage at IZ = 100μA; enables accurate scaling in 12-bit+ ADC systems. |
| Initial Accuracy | ±0.5% at 25°C; ensures ≤±50mV absolute error before temperature compensation. |
| Temp Coefficient | 100ppm/°C max over –40°C to 85°C; contributes ≤±6.5mV drift across full industrial range. |
| Wideband Noise | 35μVRMS (10Hz–10kHz); minimizes added noise in precision measurement front-ends. |
| Cathode Current Range | 45μA (min) to 15mA (max); supports ultra-low-power sensor nodes and higher-drive analog stages. |
| Dynamic Impedance | ≤0.9Ω at 1mA; maintains regulation under fast load transients in closed-loop references. |
| Thermal Hysteresis | 0.08% over –40°C ↔ 125°C cycling; limits repeatability error in thermally cycled instrumentation. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92mm × 1.30mm footprint, surface-mount, gull-wing leads. RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connected to regulated supply rail; sinks current to establish 10V reference potential relative to anode. |
| Anode (Pin 2) | Common return / ground reference | Typically tied to system ground; defines reference zero point for VZ measurement and load connection. |
| NC (Pin 3) | No internal connection | Unused terminal; must be left floating or optionally tied to anode per EMI mitigation guidance in datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable with any capacitive load up to 100nF; eliminates BOM cost and layout area for output filter. |
| Micropower operation | 45μA minimum cathode current enables use in battery-powered sensors and energy-harvesting systems. |
| Extended temperature range | Specified from –40°C to +85°C; qualified for industrial control, automotive body electronics, and outdoor equipment. |
| Low output noise | 35μVRMS over 10Hz–10kHz bandwidth; preserves SNR in high-resolution data acquisition paths. |
| Fuse/Zener-zap trimming | Factory-trimmed for ±0.5% initial accuracy; avoids post-manufacture calibration in production test. |
Applications
| Industrial Analog Input Module | Energy Infrastructure Metering |
|---|---|
Use Scenario: High-accuracy voltage scaling for 16-bit SAR ADCs in programmable logic controller (PLC) analog input cards. IC Role / Device Role / Timing Role: Precision shunt reference providing stable 10V full-scale reference for ADC conversion. Use Value: Enables ≤0.5 LSB total unadjusted error (TUE) over temperature without recalibration. |
Use Scenario: Reference for polyphase electricity meter ICs measuring grid voltage and current waveforms. IC Role / Device Role / Timing Role: Stable 10V reference for metrology-grade ADCs and anti-aliasing filters. Use Value: Maintains <±0.1% energy measurement accuracy across –25°C to +70°C field operating conditions. |
| Field Transmitter Signal Conditioning | Precision Audio Level Detection |
Use Scenario: 4–20mA loop-powered pressure/temperature transmitter with onboard analog front-end. IC Role / Device Role / Timing Role: Shunt reference establishing excitation voltage for bridge sensors and gain-setting resistors. Use Value: Delivers <±100ppm/°C drift contribution to overall transmitter accuracy, meeting IEC 61298 Class 0.1. |
Use Scenario: RMS-to-DC converter reference in studio-grade audio peak limiter and VU meter circuits. IC Role / Device Role / Timing Role: Low-noise 10V reference for precision rectifier and averaging stages. Use Value: Limits added noise floor to <0.0005% THD+N, preserving dynamic range in 24-bit audio 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 |
|---|---|---|---|
| TL4050C10IDBZR | Same 10V output, ±0.5% grade, SOT-23-3 package; lower 20μA min cathode current, 20ppm/°C typical tempco. | Better suited for ultra-low-power designs; tighter tempco improves accuracy in narrow-temp environments. | Select TL4050C10IDBZR when <30μA operating current or <50ppm/°C max drift is required. |
| REF3010AIDBZR | 10V series reference; requires 50μA supply current, 100ppm/°C max tempco, 40μVRMS noise, SO-8 package. | Higher drive capability (25mA), but needs input headroom and external bypass capacitor. | Choose REF3010AIDBZR only if sourcing >10mA load current or needing forced-ground topology. |
Compared with TL4050C10IDBZR, LM4040C10IDBZR offers higher minimum cathode current margin and identical tempco spec, while REF3010AIDBZR trades shunt simplicity for series-regulator drive strength-making LM4040C10IDBZR optimal for fixed-voltage, low-quiescent, capacitor-free reference needs.
Availability
LM4040C10IDBZR is available at Aetrix Electronics and suitable for industrial analog input modules, energy infrastructure metering, and field transmitter signal conditioning requiring stable component supply and guaranteed long-term sourcing.
Supply support for LM4040C10IDBZR 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and broad industrial portfolio coverage.
The LM4040 series was designed for cost-sensitive, space-constrained applications demanding high initial accuracy and low temperature drift-targeting data acquisition, sensor interfaces, and portable instrumentation.
FAQ
What is the maximum cathode current rating for LM4040C10IDBZR?
The absolute maximum cathode current for LM4040C10IDBZR is 25mA per Absolute Maximum Ratings. However, the recommended operating range is 45μA to 15mA. Operating above 15mA increases self-heating and may degrade long-term stability and temperature coefficient performance. The device is optimized for reliable operation within this 15mA upper limit.
Can LM4040C10IDBZR be used without an output capacitor?
Yes, LM4040C10IDBZR is explicitly designed to be stable with all capacitive loads and requires no output capacitor. Its internal architecture provides unconditional stability up to at least 100nF, simplifying layout and reducing BOM count. This feature is confirmed in the datasheet's "Stable with all capacitive loads; no output capacitor required" specification and validated across process corners and temperature.
What does the 'C' grade signify in LM4040C10IDBZR?
The 'C' in LM4040C10IDBZR denotes the C-grade accuracy specification: ±0.5% initial tolerance at 25°C and a maximum temperature coefficient of 100ppm/°C over –40°C to +85°C. This grade balances cost and performance for industrial applications where tighter A/B-grade tolerances are unnecessary but D-grade drift is unacceptable.
Is LM4040C10IDBZR compatible with lead-free reflow processes?
Yes, LM4040C10IDBZR is RoHS-compliant and qualified for standard lead-free reflow soldering per JEDEC J-STD-020. Its SOT-23-3 (DBZ) package supports peak reflow temperatures up to 260°C for 30 seconds. Moisture sensitivity level is MSL1, meaning it can be stored indefinitely at ≤30°C/85% RH without baking prior to assembly.
How does LM4040C10IDBZR handle thermal hysteresis?
LM4040C10IDBZR exhibits 0.08% thermal hysteresis, defined as the voltage difference measured at 25°C after cycling to –40°C versus after cycling to +125°C. This low hysteresis ensures repeatable reference voltage in systems experiencing repeated thermal cycles, such as outdoor industrial controllers or automotive ECUs with diurnal temperature swings.
LM4040C10IDBZR 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):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 180µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 125 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040C10IDBZR FAQ
1.How can I place an order for LM4040C10IDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040C10IDBZR 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 LM4040C10IDBZR reliable?
The price and inventory of LM4040C10IDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040C10IDBZR is usually 5 days.
3.What payment methods are accepted for LM4040C10IDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040C10IDBZR transactions.
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4.How is shipping managed for LM4040C10IDBZR?
LM4040C10IDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040C10IDBZR 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 LM4040C10IDBZR?
For technical support, including LM4040C10IDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040C10IDBZR requirements.
6.How does Aetrix verify that LM4040C10IDBZR is sourced from the original manufacturer or authorized distributors?
All LM4040C10IDBZR 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 LM4040C10IDBZR meets industry standards.
7.What is the process for return or replacement of LM4040C10IDBZR?
All LM4040C10IDBZR units undergo pre-shipment inspection (PSI). If there is an issue with LM4040C10IDBZR, 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 LM4040C10IDBZR part is unused and in its original packaging.
Return procedure for LM4040C10IDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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