Achronix Speedster22i SerDes - Manual (Page 109)

Parameter Description Min Typ Max Unit
Z
RL-CM-NYQ
Receiver Common-Mode Return Loss at
Nyquist Frequency (F
BAUD
/2)
-4 dB
Receiver DC Impedance
R
DIFF-DC
DC Differential Receive Impedance 80 100 110 Ohm
R
CM-DC
DC Common-Mode Receive Impedance 20 25 27.5 Ohm
R
DIFF-HIZ-POS
Differential Receive High Impedance for
Input Voltage from 0V to 200mV
200k Ohm
R
CM-HIZ-POS
Common-mode Receive High Impedance for
Input Voltage from 0V to 200mV
50k Ohm
R
DIFF-HIZ-NEG
Differential Receive High Impedance for
Input Voltage from -150mV to 0mV
4k Ohm
R
CM-HIZ-NEG
Common-mode Receive High Impedance for
Input Voltage from -150mV to 0mV
1k Ohm
Receiver Signal Detection
V
IDLE-THRESH
Receiver Signal Detect Input Voltage
Threshold
75 120 175
mV
diff-
pkpk
T
SIGDET-ATTACK
Signal Detect Valid Signal Attack Time
(Turn-on time) in SATA mode
15 Ns
T
SIGDET-DECAY
Signal Detect Valid Signal Decay Time (Turn-
off time) in SATA mode
15 ns
T
SIGDET-ATT-
DECAY-MIS
Signal Detect Attack / Decay Time Mismatch
in SATA mode
5 ns
Equalizer/Re-timer Mode Specifications
T
RCLK-DJ
Recovered Clock Deterministic Jitter
(in lock-to-data and in lock-to-reference
modes)
0.075 UI
pkpk
T
RCLK-RJ
Recovered Clock Random Jitter (at 1E-12
BER)
(in lock-to-data and in lock-to-reference
modes)
0.112 UI
pkpk
N
RCLK-GPLL
F3dB cutoff frequency for the 1 st Order High-
Pass Jitter Measurement Filter.
Defined as the ratio of the F
3DB
cutoff
frequency, to the data rate
1667
F
BAUD
/
F
GPLL
Repeater Receiver Input Eye Specification
V
RX-DIFF-PKPK
Receiver Input Differential Peak-Peak Voltage 250 2000
mV
diff-
pkpk
V
RX-CM-DC
Receiver Input DC Common Mode Voltage 0
mV
diff-
pkpk
V
RX-CM-AC
Receiver Input AC Common Mode Voltage -150 150
mV
diff-
pkpk
UG028, July 1, 2014 109