LM612 datasheet(3/10 Pages) NSC

3 / 10 page

Electrical Characteristics These specifications apply for Vb e GND e 0V Va e 5V VCM e VOUT e Va 2

IR e 100 mA unless otherwise specified Limits in standard typeface are for TJ e 25 C limits in boldface type apply over the

Operating Temperature Range

(Continued)

Symbol

Parameter

Conditions

(Note 7)

Typical

LM612AM

LM612M

Units

LM612AI

LM612I

Limits

(Note 8)

VOLTAGE REFERENCE

(Note 9)

Reference Voltage

1244

12365

12191

V Min

12515

12689

V Max

(g06%)

(g2%)

Average Drift with

(Note 10)

150

ppm C

Temperature

Max

Average Drift with

TJ e 40 C

400

ppmkH

Time

TJ e 150 C

1000

ppmkH

Hysteresis

(Note 11)

V C

VR Change with

VR 100 mA b VR 17 mA

005

mV Max

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

VR Change with

VR Vae 5V b VR Vae 36V

mV Max

Va Change

mV Max

VR Vae 5V b VR Vae 3V

001

mV Max

001

mV 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 not 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 the Output to Vb will not cause power dissipation so it may be continuous However shorting the 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 this total power 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 90 CW for the N package

Note 6

Human body model 100 pF discharged 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 e 25 C (standard type face) or over the full operating temperature range (bold type face)

Note 9

VR is the reference output voltage nominally 124V

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 VR 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 spiralling 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 612AMX electrical test specification is available on request The military screened parts can also be procured as a Standard Military

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