Part: LM4040 — Maxim Integrated

Type: Precision Shunt Voltage Reference

Description: The LM4040 is a precision, two-terminal shunt mode, bandgap voltage reference available in fixed reverse-breakdown voltages from 2.048V to 5.000V, offering initial accuracy down to 0.1% and a 100ppm/°C temperature coefficient, with a wide operating current range of 60μA to 15mA.

Operating Conditions:

• Operating current range: 60μA to 15mA
• Operating temperature: -40°C to +85°C (suffix-dependent — see Absolute Maximum Ratings for grade-specific ranges)
• Fixed reverse-breakdown voltages: 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, 5.000V

Absolute Maximum Ratings:

• Max reverse current (cathode to anode): 20mA
• Max forward current (anode to cathode): 10mA
• Max junction temperature: +150°C

Key Specs:

• Reverse Breakdown Voltage (LM4040A, 2.500V): 2.4975V to 2.5025V (at T A = +25°C)
• Initial Accuracy (LM4040A): 0.1% (max)
• Minimum Operating Current (LM4040A/B/C): 65 μA (max)
• Average Reverse Voltage Temperature Coefficient (LM4040A/B/C, I R = 1mA): ±100 ppm/°C (max)
• Reverse Dynamic Impedance (LM4040A/B, I R = 1mA, f = 120Hz): 0.8 Ω (max)
• Wideband Noise (2.500V, I R = 100μA, 10Hz ≤ f ≤ 10kHz): 35 μV RMS (typ)
• Reverse Breakdown Voltage Long-Term Stability (T = 1000h): 120 ppm (typ)

Features:

• Ultra-Small 3-Pin SC70 Package
• 0.1% (max) Initial Accuracy
• 100ppm/°C (max) Temperature Coefficient Guaranteed Over -40°C to +125°C Temperature Range
• Wide Operating Current Range: 60μA to 15mA
• Low 28μV RMS Output Noise (10Hz to 10kHz)
• 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V Fixed Reverse-Breakdown Voltages
• No Output Capacitors Required
• Tolerates Capacitive Loads
• AEC-Q100 Qualified

Applications:

• Portable, Battery-Powered Equipment
• Notebook Computers
• Cell Phones
• Industrial Process Controls
• Automotive

Package:

• SC70-3
• SOT-23-3

• Ultra-Small 3-Pin SC70 Package
• 0.1% (max) Initial Accuracy
• 100ppm/°C (max) Temperature Coefficient Guaranteed Over -40°C to +125°C Temperature Range
• Wide Operating Current Range: 60μA to 15mA
• Low 28μV RMS Output Noise (10Hz to 10kHz)
• 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V Fixed Reverse-Breakdown Voltages
• No Output Capacitors Required
• Tolerates Capacitive Loads
• AEC-Q100 Qualified - Refer to Ordering Information table for /V parts

Ordering Information appears at end of data sheet.

• Portable, Battery-Powered Equipment
• Notebook Computers
• Cell Phones
• Industrial Process Controls
• Automotive

LM4040DIM3-2.5 Pinout

Package: SC70 (3-pin)

Notes

• Pin 3 must be left unconnected or connected to Pin 2 (GND).
• LM4040DIM3-2.5 is a 2.5V precision shunt voltage reference.
• The part is a 3-terminal device in SC70/SOT23-3 package.

(IR = 100μA, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)

│

Reverse Current (cathode to anode)..................................

Forward Current (anode to cathode) ..................................

20mA

10mA

Continuous Power Dissipation (T A = +70°C)

3-Pin SC70 (derate 2.90mW/°C above +70°C) ...........235mW

3-Pin SOT23 (derate 3mW/°C above +70°C) ..........238.1mW

• LM4040_I_ _ _................................................ -40°C to +85°C
• LM4040_E_ _ _............................................ -40°C to +125°C
• Storage Temperature Range............................ -65°C to +150°C
• Junction Temperature......................................................+150°C
• Lead Temperature (soldering, 10s) .................................+300°C
• Soldering Temperature (reflow).......................................+260°C

Stresses beyond those listed under 'Absolute Maximum Ratings' may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.