15/26

STLC1512

4.5.4 Power Supply Noise

4.5.5 References

P(RXVCC1..2)

Current drawn by

RXVCC

8.6

mArms

While passing a

full scale

signal.<Superscri

pt>1

P(RXVCC1..2)

Current drawn by

RXVCC

6.6

8.4

mArms

Quiescent Current

P(PAON/PAOP)

Current supplied

through the center

tap of the

transformer.

93

mArms

RMS while driving

a DMT

signal.<Superscri

pt>1

P(PAON/PAOP)

Current supplied

through the center

tap of the

transformer.

20

36

mArms

Quiescent Current

<1>The nominal power is all that is available for the active power because the power is very dependent on the line impedance.

Table 11. Power Supply Noise

Noise Band

Maximum RXVCC Supply Noise

Spectral Density

Maximum TXVCC Supply Noise Spectral

Density

30kHz<f<120kHz

0.2uVrms/

√Hz @ 120kHz, rising 20dB per

decade for decreasing frequency

10uVrms/

√Hz@120kH,following 10dB per

decade for decreasing frequency to

3uVrms/

√Hz @ 30kHz

150kHz<f<540kHz

0.1uVrms/

√Hz@540kHz, rising 20dB per

decade for decreasing frequency

1uVrms/

√Hz@540kHz, rising 20dB per

decade for decreasing frequency to

7uVrms/

√Hz @150kHz

Table 12. References

PIN NAMES

Description

MIN

NOM

MAX

UNIT

COMMENTS

RBIAS

External resistance

for bias current

generation

12.3

12.4

12.5

K

Ω

To create 200uA

bias current.

REF2P5

External reference

voltage for AC

Ground.

2.425

2.5

2.575

V

External reference

voltage must be

3% accurate

I(REF2P5)

Current supplied to

REF2P5

3.75uA

8.25uA

V

TXANG/

RXANG

Tx and Rx AC ground

current sinking

capability

REF2P5*

0.97

REF2P5

REF2P5*

1.03

V

1mA source/sink

Table 10. Power Supply