HDMP-1685A Datasheet, PDF (11/21 Pages) Agilent(Hewlett-Packard) – 1.25 Gbps Four Channel SerDes with 5-pin DDR SSTL-2 Parallel Interface

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
Parameter
Units Typ.
RJ^[1]
Random Jitter at DOUT, the High Speed Electrical Data Port,
specified as 1 sigma deviation of the 50% crossing point (RMS)
ps
11
DJ^[1]
Deterministic Jitter at DOUT, the High Speed Electrical Data Port (pk-pk)
ps
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 70841
PATTERN
GENERATOR
1000001111
+ DATA
- DATA
125 MHz
A 70311A
CLOCK SOURCE
BIAS
TEE
A 83480A
OSCILLOSCOPE
TRIGGER
CH1 CH2
SOi+ SOi–
HDMP-1685
TC
PLUP
TXi[0:4]
1.4 V
0011111000
(STATIC K28.7)
A. BLOCK DIAGRAM OF RJ MEASUREMENT METHOD
Figure 8. Transmitter jitter measurement method.
A 70311A
CLOCK SOURCE
DIVIDE
BY 10
CIRCUIT
1.25 GHz
DIVIDE
BY 2
VARIABLE
DELAY
125 MHz
A 70841B
PATTERN
GENERATOR
+K28.5, -K28.5
+ DATA
- DATA
A 83480A
OSCILLOSCOPE
TRIGGER
CH1 CH2
SOi+ SOi–
SIi–
SIi+
HHDDMMP-P1-618658A5
SYNC
TC
PLUP
TXi[0:4] RXi[0:4]
B. BLOCK DIAGRAM OF DJ 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
Parameter
Units
Typ.
Max.
I_CC,TRx
P_{D, TRx[1]}
Transceiver V_CC Supply Current, T_A = 25°C
mA
Transceiver Power Dissipation, Outputs Connected
W
per Recommended Bias Terminations with 2⁷–1 PRBS Pattern
900
2.97
3.5
Θ_jc[1]
Thermal Resistance, Junction to Case
°C/W
7.8
T_j
Junction Temperature (absolute maximum)
°C
0
+125
T_C
Case Temperature (absolute maximum)
°C
0
+95
Note:
1. Based on independent package testing by Agilent. Θja for these devices is 36°C/W for the HDMP-1685A. Θja 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 + (Θjc x PD), where Tc is the case temperature measured on the top center of the package and PD is the power being dissipated.
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