Avago AFBR-83CDZ, Datasheet

Page: 6 / 26

6
Avago Technologies Confidential
Transmitter Electrical Characteristics
The following characteristics are defined over the Recommended Operating Conditions unless otherwise noted. Typical
values are for Tc = 40°C, Vcc33 = 3.3 V
Parameter Symbol Min Typ Max Units Notes
Differential Input Impedance 80 100 120
W
LOS Assert Threshold: Tx Data Input
Differential Peak-to-Peak Voltage Swing
Δ Vdi pp losA 110 mVpp Note 1
Informative
LOS De-Assert Threshold: Tx Data Input
Differential Peak-to-Peak Voltage Swing
Δ
Vdi pp losD 130 210 mVpp Note 1
Informative
LOS Hysteresis 0.5 4 dB
Parameter Test Point Min Typ Max Units Notes/Conditions
Single ended input voltage tolerance TP1a -0.3 4.0 V Note 2
AC common mode input voltage tolerance TP1a 15 mV RMS
Differential input return loss TP1 footnote dB 10 MHz to 11.1 GHz
Note 3
Differential to common-mode
input return loss
TP1 10 dB 10 MHz to 11.1 GHz
TJ Jitter tolerance TP1a 0.25 UI
DJ Jitter tolerance TP1a 0.15 UI
RJ Jitter tolerance TP1a 0.10 UI
Data Dependent Pulse Width Shrinkage
(DDPWS) tolerance
TP1a 0.07 UI
Eye Mask Coordinates:
X1, X2, Y1, Y2
TP1a SPECIFICATION VALUES
0.11, 0.31
95, 350
UI
mV
Hit Ratio = 5x10
-5
Notes:
1. At default Tx EQ setting only. Informative only. Tx LOS thresholds also represent the Tx channel squelch thresholds when enabled. Behavior per
IBTA Annex A6 CXP Interface Specification (Tx squelch disabled).
2. Referred to TP1 signal common; The single-ended input voltage tolerance is the allowable range of the instantaneous input signals
3. From 10 MHz to 11.1 GHz, the magnitude in decibels of the module differential input return loss at TP1 and the host differential output return loss
at TP1a shall not exceed the limit given in Equation
Return_loss(
ƒ
) is the return loss at frequency
ƒ
ƒ
is the frequency in GHz.
Return_loss (
ƒ
) ≥ 12 – 2√
ƒ
0.01 ≤
ƒ
< 4.1 GHz
≥ 6.3 – 13log
10
4.11 ≤
ƒ
< 11.1 GHz
ƒ
5.5




Figure 2. Tx Electrical Eye Mask Coordinates (TP1a) at Hit ratio 5 x 10
-5
hits per sample
0
-Y1
Y1
0
1-X1
X1 1
Time (UI)
Differential amplitude (mV)
Y2
-Y2
X2 1-X2