My Inquiry
My Account
Texas Instruments LM4040B10IDBZT
- Part No.:
- LM4040B10IDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040B10IDBZT.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:210
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040B10IDBZT from Texas Instruments is a precision 10V shunt voltage reference in SOT-23-3 (DBZ) package, rated for –40°C to 85°C operation. It delivers 0.2% initial accuracy, 100ppm/°C temperature coefficient, 35μVRMS wideband noise, stable performance from 45μA to 15mA cathode current, and requires no output capacitor - ideal for high-accuracy analog-to-digital conversion in industrial sensor front-ends.
For engineers reviewing the LM4040B10IDBZT datasheet, LM4040B10IDBZT pinout, LM4040B10IDBZT application, or LM4040B10IDBZT equivalent, key selection criteria include its guaranteed 10V reverse breakdown voltage at 100μA, low dynamic impedance (≤0.8Ω), thermal hysteresis of 0.08%, long-term stability (120ppm over 1000h), and compatibility with all capacitive loads without external compensation.
Technical Context
The LM4040B10IDBZT operates as a two-terminal shunt reference, sinking cathode current (IZ) to maintain a precise 10V output across its cathode-anode terminals. Its Zener-based architecture uses wafer-level fuse and Zener-zap trimming to achieve B-grade 0.2% initial tolerance and 100ppm/°C tempco over –40°C to 85°C.
It exhibits low dynamic impedance (0.3–0.8Ω at 1mA/120Hz), minimal voltage drift vs. cathode current (≤6mV from 1mA to 15mA), and stable regulation down to 45μA minimum operating current - enabling use in ultra-low-power data acquisition systems where supply headroom is constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10V nominal reverse breakdown voltage at IZ = 100μA; ensures accurate scaling for 12-/16-bit ADCs referencing to 10V full-scale. |
| Initial Accuracy | ±0.2% at 25°C; guarantees ≤±20mV absolute error before temperature or load effects - critical for calibration-critical instrumentation. |
| Tempco | 100ppm/°C max over –40°C to 85°C; contributes ≤±650ppm (±6.5mV) additional error across full industrial range. |
| Dynamic Impedance | 0.3–0.8Ω at 1mA/120Hz; minimizes output voltage shift under varying load currents - essential for stable reference in multiplexed sensor systems. |
| Wideband Noise | 35μVRMS (10Hz–10kHz); low enough to avoid degrading ENOB in 16-bit+ SAR or delta-sigma ADCs. |
| Min Cathode Current | 45μA typical; enables operation from microcontroller GPIOs or low-current LDOs in portable or energy-harvesting designs. |
| Thermal Hysteresis | 0.08% (≈8mV); limits repeatability error after thermal cycling - vital for field-deployed test equipment requiring consistent calibration. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92mm × 1.30mm footprint, surface-mount, tape-and-reel compatible. Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC (No Internal Connection, must float or connect to anode per TI EMI guidance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sensing node | Connects to regulated rail or feedback node; sinks current to clamp voltage at 10V - primary regulation point. |
| Anode (Pin 2) | Common reference terminal / ground return | Typically tied to system ground; forms reference potential for cathode voltage - defines 0V reference plane. |
| NC (Pin 3) | No internal connection | Must remain unconnected or tied to anode; not used for regulation but recommended for EMI mitigation near switching noise sources. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 10V output | Eliminates external resistor networks and trim components - reduces BOM count and layout area in compact analog modules. |
| Stable with all capacitive loads | Enables direct connection to ADC reference inputs or op-amp feedback nodes without stability-compensation capacitors. |
| Low 35μVRMS noise | Preserves signal integrity in precision measurement chains - avoids noise-induced quantization errors in high-resolution converters. |
| 45μA min operating current | Supports battery-powered or energy-harvesting applications where quiescent current must stay below 100μA. |
| –40°C to 85°C operation | Validated for industrial environments including factory automation controllers, PLC analog I/O modules, and outdoor metering. |
Applications
| Industrial Analog Input Module | Data-Acquisition System |
|---|---|
Use Scenario: 16-bit isolated analog input channel conditioning 4–20mA or ±10V sensor signals in a programmable logic controller. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 10V full-scale reference for SAR ADC and precision op-amp gain stages. Use Value: Enables <±0.5 LSB total unadjusted error across temperature, meeting IEC 61000-6-2 immunity requirements for factory-floor deployment. |
Use Scenario: Portable handheld multimeter with dual-slope or sigma-delta ADC measuring DC voltage up to 100V via precision resistive divider. IC Role / Device Role / Timing Role: Primary 10V reference source for ADC reference buffer and auto-zero calibration circuitry. Use Value: Delivers 0.08% thermal hysteresis and 120ppm/1000h long-term stability - ensuring repeatable measurements across field recalibration cycles. |
| Field Transmitter | Energy Infrastructure Monitoring |
Use Scenario: Two-wire 4–20mA smart transmitter housing temperature, pressure, or flow sensors in oil/gas wellhead installations. IC Role / Device Role / Timing Role: Precision shunt reference powering sensor excitation and setting loop current scaling via DAC feedback. Use Value: Operates reliably at 45μA minimum current and withstands –40°C cold starts - eliminating need for auxiliary bias supplies. |
Use Scenario: Smart electricity meter measuring phase voltage/current with metrology-grade accuracy per IEC 62053-21 Class 0.5S. IC Role / Device Role / Timing Role: 10V reference for anti-aliasing filter op-amps and ADC reference buffer in polyphase sampling subsystem. Use Value: 100ppm/°C tempco and 35μVRMS noise meet stringent SNR and linearity specs for revenue-grade billing accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C10IDBZT | 0.5% initial accuracy (vs. 0.2%), same 100ppm/°C tempco and 35μVRMS noise | Acceptable where cost sensitivity outweighs tight calibration requirements - e.g., non-critical sensor biasing | Select when BOM cost reduction is prioritized over end-equipment calibration labor or test time. |
| REF3010AIDBZR | Series topology, 10ppm/°C max tempco, higher 65μA min current, 25μVRMS noise | Requires input headroom >10.3V; unsuitable for low-voltage or floating-bus applications where shunt topology is mandatory | Choose only if ultra-low tempco and lower noise justify added complexity and supply margin constraints. |
Compared with LM4040C10IDBZT, the LM4040B10IDBZT offers tighter initial accuracy for reduced calibration overhead; compared with REF3010AIDBZR, it provides true two-terminal operation and lower minimum current - making it uniquely suitable for 3.3V/5V-powered shunt-regulated sensor interfaces.
Availability
LM4040B10IDBZT is available at Aetrix Electronics and suitable for industrial analog input modules, portable data-acquisition systems, field transmitters, and energy infrastructure monitoring requiring stable component supply with traceable lot control and extended lifecycle support.
Supply support for LM4040B10IDBZT 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 power management technologies, with decades of expertise in precision reference design.
The LM4040 series was engineered for high-accuracy, low-power shunt reference applications in industrial, automotive, and instrumentation systems - emphasizing stability, noise performance, and ease of use without external compensation.
FAQ
What is the maximum cathode current rating for LM4040B10IDBZT?
The LM4040B10IDBZT has an absolute maximum continuous cathode current of 25mA per its Absolute Maximum Ratings table. However, the recommended operating range is 45μA to 15mA - exceeding 15mA risks thermal overload and accelerated long-term drift. Derating is advised above 10mA in still-air conditions due to its 206°C/W junction-to-ambient thermal resistance in the DBZ package.
Does LM4040B10IDBZT require an output capacitor for stability?
No, the LM4040B10IDBZT is explicitly designed to be stable with all capacitive loads and does not require an output capacitor. This is confirmed in both the Features list and Description section of the datasheet. Adding capacitance may even degrade transient response but will not cause oscillation - simplifying layout in space-constrained analog front-ends.
What is the thermal hysteresis specification for LM4040B10IDBZT?
The LM4040B10IDBZT has a thermal hysteresis of 0.08% - defined as the voltage difference measured at 25°C after cycling to –40°C versus after cycling to 125°C. For the 10V output, this equates to approximately ±8mV hysteresis error, which is critical for applications requiring repeatable calibration after environmental stress exposure.
Can LM4040B10IDBZT be used in automotive applications?
The LM4040B10IDBZT is qualified for the industrial temperature range (–40°C to +85°C), not the full AEC-Q100 automotive grade (–40°C to +125°C). While it may function in some under-hood or cabin applications, TI does not guarantee performance or reliability beyond 85°C ambient - use LM4040B10IQDBZR (Q-grade) for automotive-qualified designs requiring operation up to 125°C.
How does the LM4040B10IDBZT compare to bandgap references in noise performance?
The LM4040B10IDBZT delivers 35μVRMS wideband noise (10Hz–10kHz), significantly lower than most standard bandgap references (typically 50–100μVRMS). This advantage stems from its buried-Zener architecture, making it preferred for metrology-grade ADCs where noise directly limits effective resolution - especially in 16-bit and higher systems.
LM4040B10IDBZT 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:
- ±0.2%
- 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
LM4040B10IDBZT FAQ
1.How can I place an order for LM4040B10IDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040B10IDBZT 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 LM4040B10IDBZT reliable?
The price and inventory of LM4040B10IDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040B10IDBZT is usually 5 days.
3.What payment methods are accepted for LM4040B10IDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040B10IDBZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040B10IDBZT?
LM4040B10IDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040B10IDBZT 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 LM4040B10IDBZT?
For technical support, including LM4040B10IDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040B10IDBZT requirements.
6.How does Aetrix verify that LM4040B10IDBZT is sourced from the original manufacturer or authorized distributors?
All LM4040B10IDBZT 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 LM4040B10IDBZT meets industry standards.
7.What is the process for return or replacement of LM4040B10IDBZT?
All LM4040B10IDBZT units undergo pre-shipment inspection (PSI). If there is an issue with LM4040B10IDBZT, 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 LM4040B10IDBZT part is unused and in its original packaging.
Return procedure for LM4040B10IDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040B10IDBZT 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…
