LM615 datasheet(3/14 Pages) NSC

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Electrical Characteristics

These specifications apply for Vb e GND e 0V Va e 5V VCM e VOUT e Va 2 IR e 100 mA FEEDBACK pin shorted to

GND unless otherwise specified Limits in standard typeface are for TJ e 25 C limits in boldface type apply over the

Operating Temperature Range

(Continued)

LM615AM

LM615M

Symbol

Parameter

Conditions

Typical

LM615AI

LM615I

Units

(Note 7)

Limits

(Note 8)

VOLTAGE REFERENCE

(Note 9)

Reference

1244

12365

12191

V min

Voltage

12515

12689

V max

(g06%)

(g2%)

Average Drift

(Note 10)

150

ppm C

with Temperature

max

Average Drift

TJ e 40 C

400

ppmkH

with Time

TJ e 150 C

1000

ppmkH

Hysteresis

(Note 11)

V C

VR Change

VR 100 mA b VR 17 mA

005

mV max

with Current

mV max

VR 10 mA b VR 100 mA

mV max

(Note 12)

mV max

Resistance

VR 10 mA to 01 mA 99 mA

056

max

VR 100 mAto17 mA 83 mA

max

VRO

VR Change

VR VRO e VR b VR VRO e 63V

mV max

with VRO

mV max

VR Change

VR Vae 5V b VR Vae 36V

mV max

with Va Change

mV max

VR Vae 5V b VR Vae 3V

001

mV max

001

mV max

IFB

FEEDBACK

Vb s VFB s 506V

nA max

Bias Current

nA max

Voltage Noise

BW e 10 Hz to 10 kHz

VRMS

Note 1

Absolute maximum ratings indicate limits beyond which damage to the component may occur Electrical specifications do not apply when operating the

device beyond its rated operating conditions

Note 2

Input voltage above Va is allowed As long as one input pin voltage remains inside the common-mode range the comparator will deliver the correct output

Note 3

More accurately it is excessive current flow with resulting excess heating that limits the voltages on all pins When any pin is pulled a diode drop below

Vb a parasitic NPN transistor turns ON No latch-up will occur as long as the current through that pin remains below the Maximum Rating Operation is undefined

and unpredictable when any parasitic diode or transistor is conducting

Note 4

Shorting an Output to Vb will not cause power dissipation so it may be continuous However shorting an Output to any more positive voltage (including

Va) will cause 80 mA (typ) to be drawn through the output transistor This current multiplied by the applied voltage is the power dissipation in the output transistor

If the total power from all shorted outputs causes the junction temperature to exceed 150 C degraded reliability or destruction of the device may occur To

determine junction temperature see Note 5

Note 5

Junction temperature may be calculated using TJ e TA a PD iJA The given thermal resistance is worst-case for packages in sockets in still air For

packages soldered to copper-clad board with dissipation from one comparator or reference output transistor nominal iJA is 80 CW for the N package

Note 6

Human body model 100 pF discharge through a 15 kX resistor

Note 7

Typical values in standard typeface are for TJ e 25 C values in boldface type apply for the full operating temperature range These values represent the

most likely parametric norm

Note 8

All limits are guaranteed for TJ ea25 C (standard type face) or over the full operating temperature range (bold type face)

Note 9

VRO is the reference output voltage which may be set for 12V to 63V (see Application Information) VR is the VRO-to-FEEDBACK voltage (nominally

1244V)

Note 10

Average reference drift is calculated from the measurement of the reference voltage at 25 C and at the temperature extremes The drift in ppm C is

106

DVR VR 25 C DTJ where DVR is the lowest value subtracted from the highest VR 25 C is the value at 25 C and DTJ is the temperature range This

parameter is guaranteed by design and sample testing

Note 11

Hysteresis is the change in VRO caused by a change in TJ after the reference has been ‘‘dehysterized’’ To dehysterize the reference that is minimize the

hysteresis to the typical value its junction temperature should be cycled in the following pattern spiraling in toward 25 C 25 C 85 C b40 C 70 C 0 C 25 C

Note 12

Low contact resistance is required for accurate measurement

Note 13

A military RETS electrical test specification is available on request The LM615AMJ883 may also be procured as a Standard Military Drawing

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