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Shunt voltage references

LM185-2.5QML-SP

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Space-grade QMLV 2.5-V  shunt voltage reference

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Data sheet

LM185-2.5QML-SP

ACTIVE
Data sheet Order now

Product details

Rating Space VO (V) 2.5 Initial accuracy (max) (%) 0.8 Iz for regulation (min) (µA) 20 VO adj (min) (V) 2.5 VO adj (max) (V) 2.5 Reference voltage (V) Fixed Temp coeff (max) (ppm/°C) 150 Operating temperature range (°C) -55 to 125 Iout/Iz (max) (mA) 20
Rating Space VO (V) 2.5 Initial accuracy (max) (%) 0.8 Iz for regulation (min) (µA) 20 VO adj (min) (V) 2.5 VO adj (max) (V) 2.5 Reference voltage (V) Fixed Temp coeff (max) (ppm/°C) 150 Operating temperature range (°C) -55 to 125 Iout/Iz (max) (mA) 20
TO-CAN (NDU) 2 34.8704 mm² 6.41 x 5.44
  • Operating Current of 20 μA to 20 mA
  • 0.6Ω Dynamic Impedance (A grade)
  • Low Temperature Coefficient
  • Low Voltage Reference—2.5V

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  • Operating Current of 20 μA to 20 mA
  • 0.6Ω Dynamic Impedance (A grade)
  • Low Temperature Coefficient
  • Low Voltage Reference—2.5V

All trademarks are the property of their respective owners.

The LM185-2.5 are micropower 2-terminal band-gap voltage regulator diodes. Operating over a 20 μA to 20 mA current range, they feature exceptionally low dynamic impedance and good temperature stability. On-chip trimming is used to provide tight voltage tolerance. Since the LM185-2.5 band-gap reference uses only transistors and resistors, low noise and good long term stability result.

Careful design of the LM185-2.5 has made the device exceptionally tolerant of capacitive loading, making it easy to use in almost any reference application. The wide dynamic operating range allows its use with widely varying supplies with excellent regulation.

The extremely low power drain of the LM185-2.5 makes it useful for micropower circuitry. This voltage reference can be used to make portable meters, regulators or general purpose analog circuitry with battery life approaching shelf life. Further, the wide operating current allows it to replace older references with a tighter tolerance part. For applications requiring 1.2V see LM185-1.2.

The LM185-2.5 are micropower 2-terminal band-gap voltage regulator diodes. Operating over a 20 μA to 20 mA current range, they feature exceptionally low dynamic impedance and good temperature stability. On-chip trimming is used to provide tight voltage tolerance. Since the LM185-2.5 band-gap reference uses only transistors and resistors, low noise and good long term stability result.

Careful design of the LM185-2.5 has made the device exceptionally tolerant of capacitive loading, making it easy to use in almost any reference application. The wide dynamic operating range allows its use with widely varying supplies with excellent regulation.

The extremely low power drain of the LM185-2.5 makes it useful for micropower circuitry. This voltage reference can be used to make portable meters, regulators or general purpose analog circuitry with battery life approaching shelf life. Further, the wide operating current allows it to replace older references with a tighter tolerance part. For applications requiring 1.2V see LM185-1.2.
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Type Title Date
* Data sheet LM185-2.5QML Micropower Voltage Reference Diode datasheet (Rev. A) 20 Mar 2013
* SMD LM185-2.5QML-SP SMD 5962-87594 21 Jun 2016
Application note Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form (Rev. A) PDF | HTML 05 Nov 2025
Application brief DLA Approved Optimizations for QML Products (Rev. C) PDF | HTML 17 Jun 2025
Application note Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. B) PDF | HTML 10 Jun 2025
Selection guide TI Space Products (Rev. K) 04 Apr 2025
More literature TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. B) 20 Feb 2025
Application note QML flow, its importance, and obtaining lot information (Rev. C) 30 Aug 2023
Application note Single-Event Effects Confidence Interval Calculations (Rev. A) PDF | HTML 19 Oct 2022
Application brief Analog Front-End Design With Texas Instruments’ Tooling Landscape PDF | HTML 07 Mar 2022
Application note DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer 21 Aug 2020
E-book Radiation Handbook for Electronics (Rev. A) 21 May 2019
More literature Die D/S LM185-2.5 MD8 Micropower Voltage Reference Diode 18 Sep 2012

Design & development

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Calculation tool

SHUNT_VOLTAGE_REFERENCE_RESISTOR_CALCULATOR — Shunt Voltage Reference External Resistor Quick Start Calculator

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Supported products & hardware

Supported products & hardware

Products
Die & wafer services
Shunt voltage references
  • ATL431 — 2.5-V low-IQ adjustable precision shunt regulator
  • LM136-2.5-N — Voltage Reference Diode
  • LM136-5.0 — 5.0V Reference Diode
  • LM136-5.0QML — 5.0V Reference Diode
  • LM136A-2.5QML — 2.5V Reference Diode
  • LM136A-2.5QML-SP — Radiation-hardened QMLV, 2.5-V shunt voltage reference
  • LM136A-5.0QML — 5.0V Reference Diode
  • LM185-1.2-N — Micropower Voltage Reference Diode
  • LM185-1.2QML — Micropower Voltage Reference Diode
  • LM185-1.2QML-SP — Radiation-hardened QMLV, 1.2-V shunt voltage reference
  • LM185-2.5-N — Micropower Voltage Reference Diode
  • LM185-2.5QML — Micropower Voltage Reference Diode
  • LM185-2.5QML-SP — Space-grade QMLV 2.5-V  shunt voltage reference
  • LM185-ADJ — Adjustable Micropower Voltage Reference
  • LM185QML — Adjustable Micropower Voltage Reference
  • LM285-1.2 — 1.235-V, –40°C to +85°C, micropower voltage reference
  • LM285-1.2-N — 1.235-V, –40°C to +85°C, micropower voltage reference diode
  • LM285-2.5 — 2.5-V, –40°C to +85°C, micropower voltage reference
  • LM285-2.5-N — 2.5-V, –40°C to +85°C, micropower voltage reference diode
  • LM285-ADJ — Adjustable, 85°C, micropower voltage reference
  • LM336-2.5 — 0°C to 70°C, 2.5-V integrated reference circuit
  • LM336-2.5-N — Voltage reference diode
  • LM336-5.0 — 5-V reference diode
  • LM385-1.2 — 1.235-V, 2%, 0°C to 70°C, micropower voltage reference
  • LM385-1.2-MIL — Micropower Voltage Reference
  • LM385-1.2-N — 1.235-V, 0°C to 70°C, micropower voltage reference diode
  • LM385-2.5 — 2.5-V, 2%, 70°C, micropower voltage reference
  • LM385-2.5-N — 2.5-V, 0°C to 70°C, micropower voltage reference diode
  • LM385-ADJ — Adjustable, 70°C, micropower voltage reference
  • LM4030 — Ultra-high-precision shunt voltage reference
  • LM4040 — Fixed voltage, 45-µA, precision micropower shunt voltage reference
  • LM4040-N — 100-ppm/°C precision micropower shunt voltage reference
  • LM4040-N-Q1 — Automotive, 100-ppm/°C precision micropower shunt voltage reference
  • LM4041-N — Fixed & adjustable, 45-µA, precision micropower shunt voltage reference
  • LM4041-N-Q1 — Automotive, precision micropower shunt voltage reference
  • LM4050-N — 50-ppm/°C precision micropower shunt voltage reference
  • LM4050-N-Q1 — Automotive, 50-ppm/°C precision micropower shunt voltage reference
  • LM4050QML-SP — Radiation-hardened QMLV, 2.5-V or 5-V shunt voltage reference
  • LM4051-N — Fixed & adjustable, precision micropower shunt voltage reference
  • LM431 — 2%, 1%, or 0.5% accuracy, adjustable precision Zener shunt regulator
  • LM4431 — Micropower shunt voltage reference
  • LMV431 — 1.5%, low-voltage (1.24-V) adjustable precision shunt regulator
  • LMV431A — 1%, low-voltage (1.24-V) adjustable precision shunt regulator
  • LMV431B — 0.5%, low-voltage (1.24-V) adjustable precision shunt regulator
Current references & sources
  • LM134 — 3-Terminal Adjustable Current Source
  • LM234 — 100°C 3-pin adjustable current source
  • LM334 — 0°C to 70°C 3-pin adjustable current source
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PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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