LM4040AEM3-2.5+T Analog Devices Integrated Circuit (SOT23 (3-Pin)) In Stock
Analog Devices LM4040AEM3-2.5+T is a precision 2.5V micropower shunt voltage reference with 0.1% initial accuracy in a tiny SOT-23-3 package. It delivers ±25mV output tolerance over the full temperature range with only 60µA minimum operating current. Available from stock with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- LM4040AEM3-2.5+T Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.9558(MOQ 1000)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 0.1% initial accuracy (Grade A) ensures 2.475V to 2.525V output over temperature without trimming or calibration
- 60µA minimum shunt current enables use in high-impedance, battery-powered reference circuits with minimal quiescent load
- SOT-23-3 package occupies under 5mm² of PCB area, ideal for portable and space-constrained precision measurement designs
Applications
The LM4040AEM3-2.5+T serves as a precision 2.5V reference in ADC bias networks, DAC reference inputs, and precision comparator threshold circuits where a stable, low-power reference is required. Its micropower 60µA minimum operating current makes it appropriate for battery-powered data loggers, portable medical instruments, and always-on IoT sensors needing a stable reference between measurement cycles. The SOT-23-3 footprint allows direct placement near the ADC VREF pin to minimize reference noise pickup.
Specifications
| Manufacturer Package Code | 3-SOT_23-N/A |
| Reach Compliance Code | Compliant |
| Date Of Intro | 2000-07-15 |
| YTEOL | 9 |
| Analog IC - Other Type | TWO TERMINAL VOLTAGE REFERENCE |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Voltage-Max | 2.5025V |
| Output Voltage-Min | 2.4975V |
| Output Voltage-Nom | 2.5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TO-236 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Technology | BICMOS |
| Temp Coef of Voltage-Max | 100ppm/°C |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trim/Adjustable Output | NO |
| Voltage Tolerance-Max | 0.1% |
| Package | SOT23 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Japan, Mainland China, Malaysia, Philippines, Singapore, South Korea, Taiwan, Thailand, USA |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the output accuracy of LM4040AEM3-2.5+T over temperature, and how does Grade A compare to Grade B?
LM4040AEM3-2.5+T (Grade A) guarantees ±0.1% initial accuracy at room temperature, meaning the 2.5V output stays within 2.475V to 2.525V. Over the -40°C to +125°C range the temperature coefficient is typically 100 ppm/°C, causing less than ±12.5mV additional drift. Grade B relaxes initial accuracy to ±0.2%, making Grade A the preferred choice for 12-bit ADC reference applications where LSB size is approximately 1.2mV.
How should LM4040AEM3-2.5+T be connected as a shunt reference in a 3.3V-powered ADC circuit?
Connect a series resistor from the 3.3V supply to the anode, sized so that shunt current stays between 60µA (minimum) and 15mA (maximum). For a 3.3V rail: R = (3.3V - 2.5V) / I_shunt. At 1mA shunt current, R = 800Ω (use 820Ω standard value). Add a 100nF ceramic capacitor from cathode to ground to suppress high-frequency noise, keeping the reference voltage stable within ±1mV for 12-bit or 16-bit ADC use.
Can LM4040AEM3-2.5+T replace a TL431 in a 2.5V reference application, and what are the key trade-offs?
LM4040AEM3-2.5+T is a direct two-terminal shunt reference like TL431 and fits the same SOT-23 footprint. The LM4040 offers tighter ±0.1% Grade A accuracy versus TL431's typical ±0.5%, and the LM4040 needs only 60µA minimum operating current versus TL431's 1mA minimum, saving 940µA in low-power designs. TL431 supports adjustable output and higher current, so choose LM4040 when fixed 2.5V and micropower operation are priorities.
For a portable data logger powered by a 3.6V lithium cell, what is the minimum operating voltage for LM4040AEM3-2.5+T?
LM4040AEM3-2.5+T requires the cathode voltage to equal or exceed its 2.5V reference output, so minimum supply is 2.5V plus the voltage drop across the series resistor. At 60µA shunt current with a 10kΩ series resistor, the minimum supply is 2.5V + 0.6V = 3.1V. A 3.6V lithium primary cell with 3.0V end-of-discharge voltage provides adequate headroom throughout the battery's discharge curve.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1000+ | $2.0558 | $2055.78 |
| 2500+ | $1.9934 | $4983.52 |
| 5000+ | $1.9558 | $9779.15 |
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