ACE432 datasheet(3/12 Pages) ACE

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ACE432

Technology

Precision adjustable shunt voltage reference

VER 1.2

Power Dissipation Table

Package

(

OC /W )

Df(mW/℃)

TA≧25℃

TA≤ 25

Power rating(mW)

TA=50

Power rating(mW)

TA= 75

Power rating (mW)

220

6.41

568

455

341

230

3.50

543

435

326

Note:

1.Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will

go into Thermal shutdown.

2.TJ: Junction Temperature Calculation TJ = TA + ( PD x θJA )

The θJA numbers are guidelines for the thermal performance of the device/PC-board system. All of the above

assume no Ambient airflow.

3.θJA : Thermal Resistance-Junction to Ambient, DF: Derating factor, Po: Power consumption

Electrical Characteristics

Parameter

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

0.5%

1.234 1.240 1.246

1.0%

1.228 1.240 1.252

1.5%

1.211 1.240 1.259

Reference Voltage

2.0%

VREF

VKA=VREF, IKA=10mA

Test Circuit #1

1.215 1.240 1.265

Deviation of reference voltage

over full temperature range

VI(DEV)

VKA=VREF, IKA=10mA

TA=0℃ to 105℃

Test Circuit #1

Ratio of change in reference

voltage to the change in cathode

voltage

ΔVREF/ΔKA

IKA=10mA

ΔVKA=8V to VREF

Test Circuit #2

-1.0

-2.7

mV/V

Reference current

IREF

IKA=10mA,

R1=10KΩ, R2=∞

Test Circuit #2

0.15

μA

Deviation of Reference current

over full temperature range

II(DEV)

IKA=10mA, TA=0℃ to

105℃ R1=10KΩ, R2=∞

Test Circuit #2

0.10

0.50

μA

Minimum cathode current for

regulation

IMIN

VKA=VREF

Test Circuit #1

100

μA

Off-state cathode current

IOFF

VKA=8V, VREF=0

Test Circuit #3

0.04

0.8

μA

Dynamic impedance

IZKAI

IKA=100μA-80mA

VKA=VREF, f≦1KHz

Test Circuit #1

0.3

1.0

Ω

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