LM4040
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
www.ti.com
SLOS456J–JANUARY 2005–REVISED SEPTEMBER 2006
FUNCTIONAL BLOCK DIAGRAM
CATHODE
+
_
ANODE
Absolute Maximum Ratings(1)
over free-air temperature range (unless otherwise noted)
MIN
MAX
25
UNIT
IZ
Continuous cathode current
–10
mA
DBZ package
DCK package
LP package
206
252
156
150
150
θJA
Package thermal impedance(2)(3)
°C/W
TJ
Operating virtual junction temperature
Storage temperature range
°C
°C
Tstg
–65
(1) 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 under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient
temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
(3) The package thermal impedance is calculated in accordance with JESD 51-7.
Recommended Operating Conditions
MIN
MAX
12
UNIT
(1)
IZ
Cathode current
mA
LM4040xxxI
LM4040xxxQ
–40
–40
85
TA
Free-air temperature
°C
125
(1) See parametric tables
7
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