LM285MX-2.5 NOPB Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
LM285MX-2.5 NOPB is a micropower 2.5V shunt voltage reference with low operating current from 20 µA to 20 mA and tight ±1% initial accuracy. It provides a stable reference voltage for ADCs, DACs, and precision comparators in battery-powered systems. Available in SOT-23 package for compact, space-saving mixed-signal designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LM285MX-2.5 NOPB Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM285MX-2.5 NOPB?
- Precision 2.5V shunt reference with ±1% initial accuracy and low dynamic impedance for stable voltage in ADC and DAC circuits
- Ultra-low minimum operating current of 20 µA enabling always-on voltage reference in coin-cell and energy-harvesting battery systems
- Wide current operating range from 20 µA to 20 mA accommodating varying load conditions without additional regulation circuitry
What is LM285MX-2.5 NOPB used for?
LM285MX-2.5 NOPB is used as a precision voltage reference for ADC and DAC circuits in data acquisition systems, portable meters, and industrial sensor transmitters where a stable 2.5V reference is required. Its micropower 20 µA minimum supply current makes it ideal for always-on battery-powered instruments such as handheld digital multimeters and wireless sensor nodes. The device also replaces Zener diodes in precision comparator threshold circuits where tight initial accuracy and low temperature drift are needed.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the LM285MX-2.5 NOPB datasheet?
LM285MX-2.5 NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM285MX-2.5 NOPB?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the minimum operating current of LM285MX-2.5 NOPB and how does it extend battery life in portable designs?
LM285MX-2.5 NOPB operates with a minimum current of 20 µA, which is approximately 50 times lower than a standard 1N4148 Zener diode used as a reference. In a coin-cell powered sensor with a 220 mAh CR2032 battery, this 20 µA current allows over 10,000 hours of continuous reference operation before the battery is depleted, significantly extending field service intervals.
How accurate is the 2.5V output of LM285MX-2.5 NOPB and which ADC resolutions does it support without external trimming?
LM285MX-2.5 NOPB has a maximum initial accuracy of ±1%, corresponding to ±25 mV on the 2.5V output. This accuracy level is compatible with 8-bit and most 10-bit ADC applications without factory trimming. For 12-bit or higher resolution ADC references requiring better than ±0.6 mV accuracy, a trimmed or grade-B version of the LM285 or a higher-precision reference such as LM4041 should be considered.
Can LM285MX-2.5 NOPB be used as a 2.5V reference in a 3.3V single-supply system with a series resistor?
Yes, LM285MX-2.5 NOPB works as a shunt reference in a 3.3V system using a series resistor calculated as R = (Vcc - Vref) / I_bias = (3.3V - 2.5V) / 0.5 mA = 1.6 kΩ. At 0.5 mA bias current, the device operates well within its 20 µA to 20 mA operating range, providing stable 2.5V output while dissipating only 1.25 mW, which is acceptable for low-power portable instruments.
How does LM285MX-2.5 NOPB in SOT-23 compare to a DIP-8 reference IC for space-sensitive PCB layouts?
The SOT-23 package of LM285MX-2.5 NOPB measures only 2.9 mm x 1.6 mm, occupying roughly 4.6 mm² of PCB area compared to over 50 mm² for a DIP-8 package. This 10x reduction in footprint allows designers to place the reference directly adjacent to the ADC input pin on dense mixed-signal PCBs, minimizing reference trace length and reducing susceptibility to noise pickup in precision measurement applications.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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