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Analog Devices Inc./Maxim Integrated LM4040BIM3-2.5+T
- Part No.:
- LM4040BIM3-2.5+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BIM3-2.5+T.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:32,560
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Product details
Overview
LM4040BIM3-2.5+T from Maxim Integrated is a precision 2.500V fixed-output shunt voltage reference in a 3-pin SOT23 package, featuring ±0.2% initial accuracy, 100ppm/°C max temperature coefficient, and 60μA–15mA operating current range. It delivers stable reverse-breakdown voltage for analog-to-digital converter (ADC) reference, portable battery-powered instrumentation, and industrial sensor signal conditioning.
For engineers reviewing the LM4040BIM3-2.5+T datasheet, LM4040BIM3-2.5+T pinout, LM4040BIM3-2.5+T application, or LM4040BIM3-2.5+T equivalent, this page provides verified specifications, thermal performance data, SC70/SOT23 package mapping, AEC-Q100-qualified variants, and design-critical stability metrics including dynamic impedance (0.8Ω), wideband noise (35µVRMS), and long-term drift (120ppm).
Technical Context
The LM4040BIM3-2.5+T operates as a two-terminal bandgap shunt reference, maintaining a precise 2.500V output across its cathode-anode terminals when reverse-biased with 60μA to 15mA current. Its laser-trimmed resistor network ensures grade-B (±0.2%) initial tolerance at +25°C, with guaranteed operation over –40°C to +85°C.
No external capacitor is required for stability, and it tolerates any capacitive load without oscillation. The device exhibits low dynamic impedance (0.3–0.8Ω), 35µVRMS output noise (10Hz–10kHz), and minimal voltage shift (<1.0mV) over 1mA current variation - enabling high-accuracy, low-power reference design in space-constrained applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.2% at +25°C; supports precision ADC/DAC biasing and sensor excitation |
| Initial Accuracy | ±0.2% (B-grade); enables single-point calibration elimination in mid-accuracy systems |
| Temp Coefficient | 100ppm/°C max; contributes ≤±0.25V drift over –40°C to +85°C ambient |
| Operating Current | 60μA to 15mA; allows ultra-low-power sleep modes and high-current regulation |
| Dynamic Impedance | 0.3–0.8Ω at 1mA; maintains <1mV output shift under fast load transients |
| Output Noise | 35µVRMS (10Hz–10kHz); suitable for 16-bit SAR ADC reference without filtering |
| Long-Term Stability | 120ppm after 1000h; ensures <0.3% output drift over 5-year product lifetime |
Pinout & Package
LM4040BIM3-2.5+T uses the industry-standard 3-pin SOT23 surface-mount package (2.92mm × 1.3mm × 1.0mm), RoHS-compliant and tape-and-reel ready. Pin 3 is NC (no connection) and must be left unconnected or tied to pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-bias input terminal; connects to supply rail through series resistor (RS) |
| 2 (–) | Anode | Reference ground node; ties to system GND and load return path |
| 3 (N.C.) | No Connection | Must remain floating or shorted to pin 2; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT23 footprint | 2.92mm × 1.3mm area saves PCB space vs. TO-92 or larger packages |
| No output capacitor required | Eliminates BOM cost and layout risk while ensuring stability with any load capacitance |
| Wide shunt current range | 60μA minimum enables microamp-level standby operation; 15mA max supports high-precision active circuits |
| AEC-Q100 qualified variants available | LM4040BEM3-2.5+T meets automotive reliability standards for under-hood sensors |
| Low 35µVRMS noise | Enables direct use in 16-bit data acquisition without external filtering |
Applications
| Portable Instrumentation | Industrial Sensor Signal Chain |
|---|---|
Use Scenario: Handheld multimeter with dual-range 16-bit ADC requiring stable reference during battery discharge. IC Role / Device Role / Timing Role: Shunt voltage reference providing 2.500V reference for ADC conversion and internal DAC calibration. Use Value: ±0.2% initial accuracy and 100ppm/°C tempco ensure <0.5% total error across 0–40°C operating range without recalibration. | Use Scenario: 4–20mA loop-powered pressure transmitter with onboard analog front-end. IC Role / Device Role / Timing Role: Precision shunt reference for bridge sensor excitation and ADC reference in isolated signal path. Use Value: 60μA–15mA operating range accommodates varying loop power budgets while maintaining <1mV output shift under load transients. |
| Battery-Powered IoT Node | Automotive Cabin Sensor Module |
Use Scenario: BLE-enabled environmental sensor node powered by coin cell (2.0–3.3V range). IC Role / Device Role / Timing Role: Low-current shunt reference for temperature/humidity sensor ADC and internal LDO feedback. Use Value: 60μA minimum operating current extends battery life beyond 5 years in periodic wake-up mode. | Use Scenario: Occupancy detection module using IR proximity sensor in vehicle cabin (-40°C to +85°C). IC Role / Device Role / Timing Role: Stable 2.500V reference for analog signal conditioning and microcontroller ADC. Use Value: AEC-Q100-compatible variants (e.g., LM4040BEM3-2.5+T) guarantee operation across full automotive temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | Adjustable 1.24V–18V output; 0.5% initial accuracy; higher 150ppm/°C tempco | Requires external resistors for 2.5V setting; less stable over temperature than LM4040BIM3-2.5+T | Select when adjustable output or higher voltage capability is needed; verify thermal drift impact on system accuracy |
| REF3025AIDBZR | 2.5V series reference; 0.2% initial accuracy; 50ppm/°C tempco; requires 50μA supply current | Three-terminal architecture demands separate supply and ground pins; not drop-in compatible | Choose for lower tempco and better PSRR where board space permits three-terminal layout |
Compared with TLVH431ACDBVR and REF3025AIDBZR, the LM4040BIM3-2.5+T offers superior thermal stability in compact two-terminal form factor, making it optimal for space-constrained, fixed-voltage reference designs where simplicity and proven long-term drift are critical.
Availability
LM4040BIM3-2.5+T is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor signal chains, and battery-powered IoT nodes requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4040BIM3-2.5+T 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
Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for industrial, automotive, and communications markets, emphasizing high reliability and low-power operation.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-sensitive applications where fixed-output accuracy, thermal stability, and zero-external-component operation are essential.
FAQ
What is the guaranteed operating temperature range for LM4040BIM3-2.5+T?
The LM4040BIM3-2.5+T is specified for operation from –40°C to +85°C. This range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet. It is distinct from the extended-range LM4040BEM3-2.5+T variant, which supports –40°C to +125°C and carries AEC-Q100 qualification for automotive use.
Can LM4040BIM3-2.5+T be used without an external capacitor?
Yes, LM4040BIM3-2.5+T does not require an external output capacitor and remains stable with any capacitive load. This is explicitly stated in the General Description and Applications Information sections. The internal design eliminates need for stabilization components, reducing BOM count and layout complexity compared to many series references.
What is the minimum shunt current required for LM4040BIM3-2.5+T to maintain regulation?
The LM4040BIM3-2.5+T requires a minimum shunt current of 65µA to maintain regulation across its full temperature range, as specified in the Electrical Characteristics table for the B-grade 2.500V version. Below this threshold, output voltage may deviate beyond guaranteed limits, especially at temperature extremes.
How does the dynamic impedance of LM4040BIM3-2.5+T affect load transient response?
The LM4040BIM3-2.5+T has a typical dynamic impedance of 0.8Ω at 1mA, meaning a 1mA load step induces only ~0.8mV output shift. This low impedance enables fast settling (sub-10µs) during load transients, as shown in Figure LM4040-06 and LM4040-10 of the datasheet - critical for high-speed ADC sampling and multiplexed sensor systems.
Is LM4040BIM3-2.5+T RoHS-compliant and lead-free?
Yes, LM4040BIM3-2.5+T is RoHS-compliant and lead-free, indicated by the "+" suffix in the part number per Maxim's ordering conventions. The package marking "FZEK" and land pattern documentation confirm compliance with JEDEC J-STD-609A Class 1 moisture sensitivity and Pb-free soldering profiles up to +260°C reflow.
LM4040BIM3-2.5+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- 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):
- 2.5V
- 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:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040BIM3-2.5+T FAQ
1.How can I place an order for LM4040BIM3-2.5+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIM3-2.5+T 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 LM4040BIM3-2.5+T reliable?
The price and inventory of LM4040BIM3-2.5+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BIM3-2.5+T is usually 5 days.
3.What payment methods are accepted for LM4040BIM3-2.5+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIM3-2.5+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIM3-2.5+T?
LM4040BIM3-2.5+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIM3-2.5+T 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 LM4040BIM3-2.5+T?
For technical support, including LM4040BIM3-2.5+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIM3-2.5+T requirements.
6.How does Aetrix verify that LM4040BIM3-2.5+T is sourced from the original manufacturer or authorized distributors?
All LM4040BIM3-2.5+T 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 LM4040BIM3-2.5+T meets industry standards.
7.What is the process for return or replacement of LM4040BIM3-2.5+T?
All LM4040BIM3-2.5+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIM3-2.5+T, 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 LM4040BIM3-2.5+T part is unused and in its original packaging.
Return procedure for LM4040BIM3-2.5+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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