14

Am79R251

ELECTRICAL CHARACTERISTICS

Power Dissipation

Loop resistance = 0 to

∞ unless otherwise noted (not including fuse resistors), 2 x 50 Ω fuse resistors,

BATL = -40 V, BATH = –68 V, BATP = +52 V, VCC = +5 V. For power dissipation measurements,

DC-feed conditions are as follows:

•

ILA (Active mode current limit) = 25 mA (IRSN = 50

µA)

•

RFD (Feed resistance) = 500

Ω

•

VAS (Anti-sat activate voltage) = 10 V

•

VAPP (Apparent Battery Voltage) = 48 V

•

RTMG1 = RTMG2 (Thermal management resistors) = 1 k

Ω

Description

Test Conditions

Min

Typ

Max

Unit

Power Dissipation

Normal Polarity

On-Hook Disconnect

TBD

mW

On-Hook Standby

TBD

On-Hook Transmission

ISLIC

Fixed Longitudinal Voltage

TBD

On-Hook Active High Battery ISLIC

TBD

Off-Hook Active Low Battery

ISLIC

RL = 294

Ω

TMG

TBD

Power Supply Currents

On-Hook Disconnect

VBH

VBL

VCC

TBD

mA

On-Hook Standby

VBH

VBL

VCC

TBD

On-Hook Transmission

VBH

Fixed Longitudinal Voltage

VBL

VCC

TBD

On-Hook Active High Battery

VBH

VBL

VCC

TBD

Off-Hook Active Low Battery

VBH

RL = 294

Ω

VBL

VCC

TBD