Datasheet

ST7538Q Electrical characteristics
9/44
3.2 Thermal data
4 Electrical characteristics
Table 3. Thermal data
Symbol Parameter
TQFP44
with slug
Unit
R
thJA1
Maximum Thermal Resistance Junction-Ambient
Steady state
(1)
1. Mounted on Multilayer PCB with a dissipating surface on the bottom side of the PCB
35 ° C/W
R
thJA2
Maximum Thermal Resistance Junction-Ambient
Steady state
(2)
2. It's the same condition of the point above, without any heatsinking surface on the board.
50 ° C/W
Table 4. Electrical characteristics
(AVdd = DVdd = +5V, PAVcc =+9 V, PAVss, SGND = DVss = 0V, -40°C ≤ T
A
≤ 85°C, T
J
< 125 °C, fc = 86kHz,
other control register parameters as default value, unless otherwise specified)
Symbol Parameter Test condition Min Typ Max Unit
AV
dd
, DV
dd
Supply voltages 4.75 5 5.25 V
PAV
dd
- DV
dd
PAV
CC
and DV
dd
Relation
during Power-Up
Sequence
DV
dd
< 4.75V with 5V
Digital supply provided
externally
0.1 1.2 V
PAV
CC
- AV
dd
PAV
CC
and AV
dd
Relation
during Power-Up
Sequence
AV
dd
< 4.75V
0.1 1.2 V
PAV
cc
Power Supply Voltage 7.5 12.5 V
Max allowed slope during
Power-Up
100 V/ms
AI
dd
+ DI
dd
Input Supply Current
Transmission &
Receiving mode
57mA
I PAV
CC
Powered Analog Supply
Current
TX mode (no load) 30 50 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 V
UVLO
HYS
UVLO Hysteresis 340 mV
Digital I/O
R
down
Pull Down Resistor 100 kΩ
R
up
Pull up Resistor 100 kΩ