TLK110 Datasheet, PDF (82/104 Pages) Texas Instruments – Industrial Temp, Single Port 10/100Mbs Ethernet Physical Layer

TLK110
SLLS901A – DECEMBER 2011 – REVISED FEBRUARY 2012
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9.5 POWER SUPPLY CHARACTERISTICS
The data was measured using a TLK110 evaluation board. The current from each of the power supply is
measured and the power dissipation is computed. For the single 3.3V external supply case the power dissipation
across the internal linear regulator is also included. All the power dissipation numbers are measured at the
nominal power supply and typical temperature of 25°C. The power needed is given both for the device only, and
including the center tap of the transformer for a total system power requirement. The center tap of the
transformer is normally connected to the 3.3V supply, thus the current needed may also be easily calculated.
9.5.1 Active Power
PARAMETER
100Base-TX /W Traffic (full packet 1518B
rate)
10Base-T /W Traffic (full packet 1518B rate)
TEST CONDITIONS
Single 3.3V external supply
Single 3.3V external supply
FROM POWER PINS
203
96
FROM
TRANSFORMER
CENTER TAP
73
211
UNIT
mW
mW
9.5.2 Power-Down Power
PARAMETER
TEST CONDITIONS⁽¹⁾
IEEE PWDN
Single 3.3V external supply
Passive Sleep Mode
Single 3.3V external supply
Active Sleep Mode
Single 3.3V external supply
(1) Measured under typical conditions.
FROM THE POWER SUPPLIES
12
71
71
ROM TRANSFORMER
CENTER TAP
5
5
5
UNIT
mW
mW
mW
82
Electrical Specifications
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