My Inquiry
My Account
Texas Instruments LM4040BIM3-3.0
- Part No.:
- LM4040BIM3-3.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BIM3-3.0.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,449
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040BIM3-3.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 3.0 V reverse breakdown voltage with ±0.2% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and operation from 62 μA to 15 mA. It serves as a compact, capacitor-free reference for ADCs, DACs, and sensor signal conditioning in portable instrumentation.
For engineers reviewing the LM4040BIM3-3.0 datasheet, LM4040BIM3-3.0 pinout, LM4040BIM3-3.0 application, or LM4040BIM3-3.0 equivalent, this page provides verified electrical specifications, validated SOT-23 pin functions, confirmed industrial temperature range (−40°C to +85°C), and two technically documented alternative parts for design flexibility.
Technical Context
The LM4040BIM3-3.0 uses a Zener-zap trimmed bandgap architecture with curvature-corrected temperature drift compensation, enabling stable 3.0 V output across −40°C to +85°C. Its low dynamic impedance (≤0.8 Ω at 1 mA) and wide operating current range (62 μA–15 mA) support direct use with capacitive loads without external stabilization.
It operates as a two-terminal shunt device: cathode sinks current to regulate voltage at the anode node, requiring only a series resistor for biasing. No output capacitor is needed, and it tolerates load capacitance up to 10 nF while maintaining stability - critical for space-constrained battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, fixed and factory-trimmed |
| Initial Tolerance | ±0.2% at 25°C (B-grade), enabling high-accuracy 12-bit+ data conversion |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C, limiting drift to ±6.5 mV across full range |
| Operating Current | 62 μA minimum to 15 mA maximum, supporting ultra-low-power and high-current designs |
| Dynamic Impedance | ≤0.8 Ω at 1 mA, ensuring minimal load regulation error (<6 mV from 1 mA to 15 mA) |
| Output Noise | 35 μVRMS (10 Hz–10 kHz), suitable for precision analog front-ends |
| Long-Term Stability | 120 ppm after 1000 hours, indicating <0.036% output shift over 1k-hour burn-in |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC-compliant footprint with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage node | Connects to supply rail via series resistor; voltage at this node is regulated to 3.0 V |
| Anode (Pin 2) | Reference ground terminal | Typically connected to system ground; defines the 0 V reference for output voltage |
| NC (Pin 3) | No-connect terminal | Must be left floating or tied to Pin 2 (anode); no internal connection or function |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into space-limited PCB layouts without stability-compensation components |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance, simplifying filtering for noise-sensitive ADC references |
| Micropower operation | 62 μA minimum current allows use in always-on sensor nodes with multi-year battery life |
| Low dynamic impedance | 0.8 Ω typical ensures <1 mV load regulation error across 1–15 mA, critical for precision ratiometric circuits |
| Industrial temperature range | Specified performance from −40°C to +85°C supports deployment in harsh environmental conditions |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitors measuring temperature, humidity, and pressure over months between charges. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.0 V excitation and ADC reference for ratiometric sensor measurements. Use Value: Micropower operation (62 μA min) extends battery life; ±0.2% tolerance ensures <0.5°C temperature measurement accuracy. |
Use Scenario: 4–20 mA loop-powered transmitters converting analog sensor outputs to standardized current signals. IC Role / Device Role / Timing Role: Precision voltage reference for DAC and op-amp circuitry generating accurate current setpoints. Use Value: 100 ppm/°C tempco limits output drift to <±0.25% over −40°C to +85°C, meeting IEC 61000-6-2 industrial immunity requirements. |
| Medical Wearable Sensors | Energy Metering Front-Ends |
Use Scenario: Compact ECG and pulse oximetry modules requiring low-noise, stable biasing for analog signal chains. IC Role / Device Role / Timing Role: Low-noise (35 μVRMS) shunt reference for ADC reference and op-amp feedback networks. Use Value: Absence of external capacitor eliminates board area and BOM cost; 0.8 Ω dynamic impedance minimizes noise coupling into sensitive biopotential amplifiers. |
Use Scenario: Polyphase electricity meters performing high-resolution voltage and current sampling for revenue-grade energy calculation. IC Role / Device Role / Timing Role: Primary voltage reference for 24-bit delta-sigma ADCs measuring grid voltage with <0.1% total error budget. Use Value: ±0.2% initial tolerance and 120 ppm long-term stability ensure meter calibration remains valid over 10+ years of field operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050B30IDBZR | 3.0 V, ±0.2% tolerance, SOT-23-3, but higher 75 ppm/°C max tempco and 1.2 Ω dynamic impedance | Less stable over temperature; requires tighter thermal management in wide-range industrial environments | Preferred when lower cost is prioritized over long-term drift and load regulation performance |
| MAX6003EUR+T | 3.0 V, ±0.2% tolerance, SOT-23-3, but wider 60–20 mA operating current range and 1.5 Ω dynamic impedance | Higher minimum current (60 μA vs. 62 μA) and reduced load regulation accuracy limit use in ultra-low-power designs | Selected where compatibility with legacy MAX600x layout footprints is required |
Compared with LM4040BIM3-3.0, TL4050B30IDBZR offers cost advantage but sacrifices thermal stability and dynamic impedance; MAX6003EUR+T maintains pinout compatibility but trades off micropower capability and regulation precision for broader current handling.
Availability
LM4040BIM3-3.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical wearable sensors requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for LM4040BIM3-3.0 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
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 reliability.
The LM4040-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and industrial-grade measurement systems demanding high initial accuracy and low temperature drift.
FAQ
What is the exact reverse breakdown voltage specification for LM4040BIM3-3.0?
The LM4040BIM3-3.0 has a nominal reverse breakdown voltage of 3.0 V, with a guaranteed tolerance of ±0.2% at 25°C (±6 mV). This value is measured at 100 μA test current and remains stable across its full operating current range (62 μA to 15 mA) and industrial temperature range (−40°C to +85°C). The LM4040BIM3-3.0 achieves this via Zener-zap trimming during wafer sort.
Does LM4040BIM3-3.0 require an external output capacitor for stability?
No, the LM4040BIM3-3.0 does not require an external output capacitor. Its internal bandgap-Zener hybrid architecture ensures inherent stability with any capacitive load up to 10 nF. This eliminates the need for board space and BOM cost associated with stabilization capacitors - a key advantage over older shunt references like the TL431. The LM4040BIM3-3.0 remains stable even when directly driving ADC reference inputs or op-amp feedback networks.
What is the minimum operating current for LM4040BIM3-3.0, and why does it matter?
The LM4040BIM3-3.0 requires a minimum operating current of 62 μA at 25°C to maintain regulation within specification. Below this threshold, the output voltage deviates from 3.0 V due to insufficient Zener conduction. This low minimum current enables use in ultra-low-power applications such as battery-backed real-time clocks or wake-up comparators, where the LM4040BIM3-3.0 contributes negligible quiescent drain while delivering precision voltage.
How does the temperature coefficient of LM4040BIM3-3.0 affect system accuracy?
The LM4040BIM3-3.0 has a maximum average temperature coefficient of 100 ppm/°C over −40°C to +85°C. Over this 125°C span, that translates to a worst-case voltage drift of ±12.5 mV (0.42% of 3.0 V). This is fully characterized and included in the total overtemperature tolerance (±0.85%), making the LM4040BIM3-3.0 suitable for applications where absolute voltage accuracy must remain within ±15 mV across ambient temperature variations.
Can LM4040BIM3-3.0 replace LM4040AIM3-3.0 in an existing design?
Yes, the LM4040BIM3-3.0 is a direct drop-in replacement for the LM4040AIM3-3.0 in most cases, sharing identical SOT-23-3 package, pinout, and electrical interface. The primary difference is initial tolerance: ±0.2% (B-grade) versus ±0.1% (A-grade). If the original design accommodates ±0.2% tolerance - verified by checking ADC full-scale error budgets - the LM4040BIM3-3.0 can be substituted without layout or schematic changes.
LM4040BIM3-3.0 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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 67 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040BIM3-3.0 FAQ
1.How can I place an order for LM4040BIM3-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIM3-3.0 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 LM4040BIM3-3.0 reliable?
The price and inventory of LM4040BIM3-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BIM3-3.0 is usually 5 days.
3.What payment methods are accepted for LM4040BIM3-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIM3-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIM3-3.0?
LM4040BIM3-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIM3-3.0 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 LM4040BIM3-3.0?
For technical support, including LM4040BIM3-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIM3-3.0 requirements.
6.How does Aetrix verify that LM4040BIM3-3.0 is sourced from the original manufacturer or authorized distributors?
All LM4040BIM3-3.0 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 LM4040BIM3-3.0 meets industry standards.
7.What is the process for return or replacement of LM4040BIM3-3.0?
All LM4040BIM3-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIM3-3.0, 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 LM4040BIM3-3.0 part is unused and in its original packaging.
Return procedure for LM4040BIM3-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040BIM3-3.0 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…
