LM431ACZ National Semiconductor, LM431ACZ Datasheet - Page 5

• Manufacturer Part Number: LM431ACZ
• Description: IC, ADJ SHUNT REG, 2.495V, 2%, TO-92
• Manufacturer: National Semiconductor

Specifications of LM431ACZ

• Topology: Shunt, Programmable
• Reference Voltage: 2.495V
• Reference Voltage Tolerance: 55mV
• Voltage Reference Case Style: TO-92
• No. Of Pins: 3
• Temperature Coefficient: 50ppm/°C
• Fixed / Adjust / Prog: Adjust
• Output Voltage (max): 2.495 to 37V
• Reference Voltage Accuracy (max): 2
• Input Voltage (max): 37V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 3
• Package Type: TO-92
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

1005507
The average temperature coefficient of the reference input voltage, V
, is defined as:
REF
Where:
T
− T
= full temperature change (0-70°C).
2
1
V
can be positive or negative depending on whether the slope is positive or negative.
REF
Example: V
= 8.0 mV, V
= 2495 mV, T
− T
= 70°C, slope is positive.
DEV
REF
2
1
Note 5: The dynamic output impedance, r
, is defined as:
Z
When the device is programmed with two external resistors, R1 and R2, (see
Figure 2
), the dynamic output impedance of the overall circuit, r
, is defined as:
Z
Equivalent Circuit
1005503
5
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