LT1431IN8-PBF datasheet(3/14 Pages) LINER

Part #	LT1431IN8-PBF

Description	Programmable Reference

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Manufacturer	LINER [Linear Technology]

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LT1431

1431fd

elecTrical characTerisTics

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: VKA is the cathode voltage of the LT1431CZ/IZ and corresponds

to V+ of the LT1431CN8/IN8/CS8/IS8. IK is the cathode current of the

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. IK = 10mA unless otherwise specified (Note 2)

SYMBOL

PARAMETER

CONDITIONS

LT1431I, LT1431M

LT1431C

UNITS

MIN

TYP

MAX

MIN

TYP

MAX

VREF

Reference Voltage

VKA = 5V, IK = 2mA, (Note 3)

l

2.490

2.465

2.500 2.510

2.535

2.490

2.480

2.500 2.510

2.520

V

∆VREF/∆T

Reference Drift

VKA = 5V, IK = 2mA

l

50

30

ppm/°C

∆VREF/∆VKA Voltage Ratio, Reference to

Cathode (Open-Loop Gain)

IK = 2mA, VKA = 3V to 36V

l

0.2

0.5

0.2

0.5

mV/V

|IREF|

Reference Input Current

VKA = 5V, TA = 25°C

l

0.2

1.0

1.5

0.2

1.0

1.2

µA

IMIN

Minimum Operating Current

VKA = VREF to 36V

0.6

1.0

0.6

1.0

mA

|IOFF|

Off-State Cathode Current

VKA = 36V, VREF = 0V

l

1

15

1

2

µA

|ILEAK|

Off-State Collector Leakage Current VCOLL = 36V, V+ = 5V, VREF = 2.4V

l

1

5

1

2

µA

|ZKA|

Dynamic Impedance

VKA = VREF, IK = 1mA to 100mA, f ≤ 1kHz

0.2

Ω

ILIM

Collector Current Limit

VKA = VREF + 50mV

l

80

360

100

260

mA

5V Reference Output

Internal Divider Used, IK = 2mA

4.950 5.000 5.050 4.950 5.000 5.050

V

LT1431CZ/IZ and corresponds to I(V+) + ICOLLECTOR of the LT1431CN8/

IN8/CS8/IS8.

Note 3: The LT1431 has bias current cancellation which is effective only

for VKA ≥ 3V. A slight (≈2mV) shift in reference voltage occurs when

VKA drops below 3V. For this reason, these tests are not performed at

VKA = VREF.

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