OUTPUT VOLTAGE ADJUSTABLE FROM 2.5 TO 36V WITH TWO EXTERNAL RESISTORS
Analog IC - Other Type:
TWO TERMINAL VOLTAGE REFERENCE
JESD-30 Code:
R-PDSO-G8
JESD-609 Code:
e0
Length:
4.9 mm
Moisture Sensitivity Level:
1
Number of Functions:
1
Number of Outputs:
1
Number of Terminals:
8
Operating Temperature-Max:
85 °C
Operating Temperature-Min:
-40 °C
Output Current-Max:
0.1 A
Output Voltage-Max:
2.51 V
Output Voltage-Min:
2.485 V
Output Voltage-Nom:
2.5 V
Package Body Material:
PLASTIC/EPOXY
Package Code:
SOP
Package Equivalence Code:
SOP8,.25
Package Shape:
RECTANGULAR
Package Style:
SMALL OUTLINE
Peak Reflow Temperature (Cel):
235
Qualification Status:
Not Qualified
Seated Height-Max:
1.75 mm
Surface Mount:
YES
Technology:
BIPOLAR
Temp Coef of Voltage-Max:
54.509 ppm/°C
Temperature Grade:
INDUSTRIAL
Terminal Finish:
Tin/Lead (Sn/Pb)
Terminal Form:
GULL WING
Terminal Pitch:
1.27 mm
Terminal Position:
DUAL
Time@Peak Reflow Temperature-Max (s):
NOT SPECIFIED
Trim/Adjustable Output:
YES
Width:
3.9 mm
LM431CIM Frequently Asked Questions (FAQs)
The recommended operating temperature range for the LM431CIM is -40°C to 125°C. However, it's essential to note that the device's accuracy and stability may degrade at extreme temperatures.
To ensure stability, it's crucial to follow proper PCB layout practices, such as keeping the input and output traces short and separate, using a low-ESR capacitor, and minimizing parasitic inductance. Additionally, adding a small capacitor (e.g., 10nF) between the cathode and anode can help prevent oscillations.
The maximum allowed voltage on the LM431CIM's reference input (Vref) is 36V. Exceeding this voltage can damage the device. It's essential to ensure that the voltage on Vref is within the recommended range to maintain the device's accuracy and reliability.
While the LM431CIM can be used as a voltage regulator, it's not its primary intended function. The device is designed as a precision voltage reference, and its output current capability is limited (typically up to 10mA). If you need a voltage regulator, consider using a dedicated voltage regulator IC, such as the LM317 or LM338.
The output voltage of the LM431CIM is determined by the resistor divider network connected to the cathode and anode. The output voltage can be calculated using the formula: Vout = Vref * (R1 / R2), where Vref is the internal reference voltage (2.5V), R1 is the resistor connected between the cathode and output, and R2 is the resistor connected between the anode and output.
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LM431CIM Overview
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
