ACPL-C87B datasheet(13/14 Pages) AVAGO

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Table 13. Diagnostic Parameters

Diagnostic Parameter

Range

LSB

Accuracy

Address

Note

Min.

Max.

Transceiver

Temperature(Temp)

-15

[ºC]

+105

[ºC]

1/256

[ºC]

±3

[ºC]

96-97

A 16 bit signed twos

complement value

Supply Voltage (Voltage)

+2.97

[V]

+3.63

[V]

100

[µV]

±3

[%]

98-99

A 16 bit unsigned integer

TX Bias Current (Bias)

[mA]

+95

[mA]

2.0

[µA]

±10

[%]

100-101

A 16 bit unsigned integer

TX Optical Output Power

(TX Power)

-6

[dBm]

0.1

[µW]

±3

[dB]

102-103

A 16 bit unsigned integer

RX Optical Input Power (RX

Power)

-25

[dBm]

0.1

[µW]

±3

[dB]

104-105

A 16 bit unsigned integer

Table 14. Alarm and Warning Thresholds

Parameter

Unit

Warning

Alarm

Low

High

Low

High

Transceiver Temperature

ºC

-5

+70

-10

+75

Supply Voltage

+3.1

+3.5

+3.6

TX Bias Current

TX Optical Output Power

dBm

-4

-7

RX Optical Input Power

dBm

-21

-22

Digital Diagnostic Monitoring

2 wire serial bus address 1010001X (A2h) is used to access

measurement of transceiver temperature, internally mea-

sured supply voltage, TX bias current, TX optical output

power and RX optical input power which are shown in

Table 13. Each diagnostic parameter has a corresponding

high alarm, low alarm, high warning and low warning

threshold which are shown in Table 14. Alarm flags indi-

cate conditions likely to be associated with an inopera-

tional link and cause for immediate action. Warning flags

indicate conditions outside the normally guaranteed

bounds but not necessarily causes of immediate link fail-

ures. It is recommended that detection of an asserted flag

bit should be verified by a second read of the flag at least

100 msec later. The detail contents of the 2 wire address

A2h are shown in Table 15 to 21.

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