ST7538Q datasheet(9/44 Pages) STMICROELECTRONICS

9 / 44 page

ST7538Q

Electrical characteristics

9/44

3.2

Thermal data

Electrical characteristics

Table 3. Thermal data

Symbol

Parameter

TQFP44

with slug

Unit

RthJA1

Maximum Thermal Resistance Junction-Ambient

Steady state (1)

Mounted on Multilayer PCB with a dissipating surface on the bottom side of the PCB

° C/W

RthJA2

Maximum Thermal Resistance Junction-Ambient

Steady state (2)

It's the same condition of the point above, without any heatsinking surface on the board.

° C/W

Table 4. Electrical characteristics

(AVdd = DVdd = +5V, PAVcc =+9 V, PAVss, SGND = DVss = 0V, -40°C

≤TA ≤ 85°C, TJ < 125 °C, fc = 86kHz,

other control register parameters as default value, unless otherwise specified)

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

AVdd, DVdd

Supply voltages

4.75

5.25

PAVdd - DVdd

PAVCC and DVdd Relation

during Power-Up

Sequence

DVdd < 4.75V with 5V

Digital supply provided

externally

0.1

1.2

PAVCC - AVdd

PAVCC and AVdd Relation

during Power-Up

Sequence

AVdd < 4.75V

0.1

1.2

PAVcc

Power Supply Voltage

7.5

12.5

Max allowed slope during

Power-Up

100

V/ms

AIdd + DIdd

Input Supply Current

Transmission &

Receiving mode

I PAVCC

Powered Analog Supply

Current

TX mode (no load)

mArms

RX mode

500

1000

µA

Maximum total current

370

mArms

UVLO

Input Under Voltage Lock

Out

Threshold on PAVcc

3.7

3.9

4.1

UVLOHYS

UVLO Hysteresis

340

Digital I/O

Rdown

Pull Down Resistor

100

Ω

Rup

Pull up Resistor

100

Ω

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