HDMP-1685A Output Jitter Characteristics – Transmitter Section
T
A
= 0°C to T
C
= 85°C, V
CC
= 3.15 V to 3.45 V
Symbol
RJ
[1]
DJ
[1]
Parameter
Random Jitter at DOUT, the High Speed Electrical Data Port,
specified as 1 sigma deviation of the 50% crossing point (RMS)
Deterministic Jitter at DOUT, the High Speed Electrical Data Port (pk-pk)
Units
ps
ps
Typ.
11
26
Note:
1. Defined by Fibre Channel Specification X3.230-1994 FC-PH Standard, Annex A, Section A.4 and tested using measurement method shown
in Figure 8.
A 70311A
CLOCK SOURCE
A 70841B
PATTERN
GENERATOR
+K28.5, -K28.5
A 70841
PATTERN
GENERATOR
1000001111
+ DATA
- DATA
125 MHz
A 83480A
OSCILLOSCOPE
TRIGGER
CH1
CH2
1.25 GHz
+ DATA
- DATA
A 83480A
OSCILLOSCOPE
DIVIDE
BY 10
CIRCUIT
DIVIDE
BY 2
TRIGGER
CH1
CH2
A 70311A
CLOCK SOURCE
SOi+
BIAS
TEE
TC
TXi[0:4]
SOi–
HDMP-1685
PLUP
VARIABLE
DELAY
SOi+
SOi–
SIi–
SIi+
SYNC
PLUP
HDMP-1685A
HDMP-1685
125 MHz
TC
TXi[0:4]
RXi[0:4]
1.4 V
0011111000
(STATIC K28.7)
A. BLOCK DIAGRAM OF RJ MEASUREMENT METHOD
B. BLOCK DIAGRAM OF DJ MEASUREMENT METHOD
Figure 8. Transmitter jitter measurement method.
HDMP-1685A Thermal and Power Temperature Characteristics (TRx)
T
A
= 0°C to T
C
= 85°C, V
CC
= 3.15 V to 3.45 V
Symbol
I
CC,TRx
P
D, TRx [1]
Θ
jc[1]
T
j
T
C
Parameter
Transceiver V
CC
Supply Current, T
A
= 25°C
Transceiver Power Dissipation, Outputs Connected
per Recommended Bias Terminations with 2
7
–1 PRBS Pattern
Thermal Resistance, Junction to Case
Junction Temperature (absolute maximum)
Case Temperature (absolute maximum)
Units
mA
W
°C/W
°C
°C
Typ.
900
2.97
7.8
0
0
+125
+95
3.5
Max.
Note:
1. Based on independent package testing by Agilent.
Θ
ja
for these devices is 36°C/W for the HDMP-1685A.
Θ
ja
is measured on
a standard 3x3" FR4 PCB in a still air environment. To determine the actual junction temperature in a given application, use the following:
Tj = Tc + (Θ
jc
x P
D
), where Tc is the case temperature measured on the top center of the package and P
D
is the power being dissipated.
10
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
