My Inquiry
My Account
Texas Instruments LM4040A82IDBZR
- Part No.:
- LM4040A82IDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040A82IDBZR.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,213
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040A82IDBZR from Texas Instruments is a precision micropower shunt voltage reference with 8.192V nominal output, ±0.1% initial accuracy (A grade), 100ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation from 45μA to 15mA cathode current. It serves as a high-stability voltage reference in analog-to-digital converter biasing and sensor signal conditioning circuits.
For engineers reviewing the LM4040A82IDBZR datasheet, LM4040A82IDBZR pinout, LM4040A82IDBZR application, or LM4040A82IDBZR equivalent, key selection criteria include initial tolerance at 25°C, thermal drift over –40°C to 85°C, dynamic impedance under varying load current, noise performance in precision measurement front-ends, and compatibility with capacitive loads without external compensation.
Technical Context
The LM4040A82IDBZR operates as a two-terminal shunt reference, sinking cathode current to maintain a precise 8.192V reverse breakdown voltage across its terminals. Its Zener-zap trimmed silicon design achieves tight initial tolerance via wafer-level fuse trimming, and its low dynamic impedance (≤0.8Ω at 1mA) ensures minimal output voltage variation with load transients.
It functions within an industrial temperature range of –40°C to +85°C and requires no output capacitor-stable with all capacitive loads-including those found in data acquisition system input stages and isolated sensor interfaces where layout constraints limit decoupling options.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8.192V nominal at IZ = 100μA; enables exact binary-scaled reference for 13-bit ADCs and DACs |
| Initial Accuracy | ±0.1% at 25°C; supports high-resolution measurement systems requiring <1 LSB error at 12-bit resolution |
| Temp Coefficient | 100ppm/°C max; contributes ≤±0.65% drift over –40°C to 85°C ambient, critical for field-deployed instrumentation |
| Wideband Noise | 35μVRMS (10Hz–10kHz); avoids noise-induced quantization errors in sub-16-bit precision signal chains |
| Cathode Current Range | 45μA to 15mA typical; allows ultra-low-power operation in battery-powered sensors and robust sourcing in industrial PLC modules |
| Dynamic Impedance | ≤0.8Ω at 1mA, 120Hz; minimizes output voltage shift during fast load steps in multiplexed analog front-ends |
| Long-Term Stability | 120ppm after 1000 hours; ensures calibration integrity in medical and test equipment with multi-year service life |
Pinout & Package
SOT-23-3 (DBZ) package: compact 2.92mm × 1.30mm footprint optimized for space-constrained PCB layouts in portable and modular instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current/voltage input | Connected to regulated supply rail; sinks current to clamp voltage at 8.192V |
| Anode (Pin 2) | Common reference node | Typically tied to system ground; forms return path for cathode current |
| NC (Pin 3) | No internal connection | Must float or connect to anode per TI recommendation in EMI-sensitive environments |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Eliminates need for external bypass capacitor-reduces BOM count and layout area in compact sensor nodes |
| Micropower operation | 45μA minimum cathode current enables use in energy-harvesting and coin-cell-powered devices |
| Extended temp range support | Specified from –40°C to +85°C, enabling deployment in automotive cabin electronics and industrial control cabinets |
| Low thermal hysteresis | 0.08% max; prevents voltage memory effects after thermal cycling in outdoor environmental monitoring units |
| High ESD robustness | ±2000V HBM rating protects against handling damage during manual assembly and field servicing |
Applications
| Industrial Data Acquisition | Process Field Transmitters |
|---|---|
Use Scenario: High-accuracy 16-bit SAR ADC reference in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Provides stable 8.192V reference for ratiometric conversion of 4–20mA loop signals into digital values. Use Value: Enables ±0.025% full-scale accuracy over temperature-meeting IEC 61000-6-2 immunity requirements for factory automation. | Use Scenario: Reference source in Rosemount-style 2-wire smart pressure transmitters operating on 4–20mA loop power. IC Role / Device Role / Timing Role: Supplies precision bias for bridge sensor excitation and ADC reference in ultra-low-power microcontroller-based transmitter designs. Use Value: Delivers 8.192V output with <45μA quiescent current, allowing full functionality within 3.5mA loop budget while maintaining 0.1% linearity. |
| Energy Infrastructure Monitoring | Precision Audio Level Detection |
Use Scenario: Voltage reference for isolation amplifier feedback in solar inverter DC-link voltage sensing. IC Role / Device Role / Timing Role: Sets gain and offset in isolated sigma-delta modulator front-end used for high-voltage DC bus monitoring. Use Value: 100ppm/°C tempco and 35μVRMS noise ensure <0.05% measurement error across –25°C to +70°C inverter enclosure temperatures. | Use Scenario: Reference for RMS-to-DC converter in professional audio level metering circuits. IC Role / Device Role / Timing Role: Defines full-scale input threshold for logarithmic response scaling in broadcast-quality VU meters. Use Value: Binary-aligned 8.192V output matches standard 13-bit digital audio word length, simplifying firmware scaling and eliminating floating-point math. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040B82IDBZR | ±0.2% initial accuracy (vs. ±0.1%), same tempco and noise | Acceptable where 12-bit system resolution suffices and cost optimization is prioritized | Select when total unadjusted error budget allows ±0.2% at 25°C and tighter long-term stability is not required |
| REF43FH82IDBVR | 8.192V output, ±0.05% initial accuracy, 3ppm/°C tempco, higher 1.5mA min current | Used in metrology-grade instruments requiring sub-16-bit stability; incompatible with micropower designs | Choose only when ultra-low drift and lab-grade accuracy justify higher quiescent current and cost premium |
Compared with LM4040B82IDBZR, the LM4040A82IDBZR delivers twice the initial accuracy for high-resolution data acquisition, while REF43FH82IDBVR offers superior drift performance at the expense of 33× higher minimum operating current-making LM4040A82IDBZR optimal for battery-powered field instruments balancing precision and power.
Availability
LM4040A82IDBZR is available at Aetrix Electronics and suitable for industrial data acquisition, process field transmitters, energy infrastructure monitoring, and precision audio level detection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4040A82IDBZR 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 industrial-grade components.
The LM4040 series was designed specifically for high-accuracy, low-power shunt reference applications in data acquisition, sensor signal conditioning, and industrial control systems where space, power, and long-term stability are critical.
FAQ
What is the maximum cathode current rating for LM4040A82IDBZR?
The absolute maximum cathode current for LM4040A82IDBZR is 25mA, but the recommended operating range is 45μA to 15mA. Exceeding 15mA may increase self-heating and degrade long-term stability; operation above 25mA risks permanent device damage per TI's Absolute Maximum Ratings table.
Does LM4040A82IDBZR require an external output capacitor?
No, LM4040A82IDBZR is stable with all capacitive loads and does not require an external output capacitor. This feature simplifies PCB layout and reduces bill-of-materials cost-particularly valuable in space-constrained applications like handheld test equipment and modular I/O systems.
What is the thermal hysteresis specification for LM4040A82IDBZR?
The thermal hysteresis for LM4040A82IDBZR is 0.08%, 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 performance in applications subject to repeated thermal cycling, such as outdoor environmental sensors and automotive engine bay modules.
Can LM4040A82IDBZR be used in automotive applications?
LM4040A82IDBZR is qualified for the industrial temperature range (–40°C to +85°C), making it suitable for cabin and body-control automotive applications-but not for under-hood or safety-critical powertrain systems. For extended-range automotive use up to +125°C, TI offers the LM4040xQ variants (e.g., LM4040A82IQDBZR), which are AEC-Q100 qualified.
How does the 8.192V output voltage benefit digital systems?
The 8.192V output of LM4040A82IDBZR corresponds exactly to 213 × 1mV, enabling direct binary-scaled full-scale definition for 13-bit ADCs and DACs. This eliminates software scaling factors, reduces firmware complexity, and avoids rounding errors in digital signal processing pipelines used in precision instrumentation and audio converters.
LM4040A82IDBZR 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):
- 8.192V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 130µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 110 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040A82IDBZR FAQ
1.How can I place an order for LM4040A82IDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040A82IDBZR 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 LM4040A82IDBZR reliable?
The price and inventory of LM4040A82IDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040A82IDBZR is usually 5 days.
3.What payment methods are accepted for LM4040A82IDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040A82IDBZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040A82IDBZR?
LM4040A82IDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040A82IDBZR 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 LM4040A82IDBZR?
For technical support, including LM4040A82IDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040A82IDBZR requirements.
6.How does Aetrix verify that LM4040A82IDBZR is sourced from the original manufacturer or authorized distributors?
All LM4040A82IDBZR 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 LM4040A82IDBZR meets industry standards.
7.What is the process for return or replacement of LM4040A82IDBZR?
All LM4040A82IDBZR units undergo pre-shipment inspection (PSI). If there is an issue with LM4040A82IDBZR, 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 LM4040A82IDBZR part is unused and in its original packaging.
Return procedure for LM4040A82IDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040A82IDBZR 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…
