2.7Gbps Post Amp with Automatic Gain Control
ELECTRICAL CHARACTERISTICS (continued)
(V
= +3.0V to +3.6V, T = -40°C to +85°C. Typical values are at V
= +3.3V and T = +25°C, unless otherwise noted.) (Note 1)
CC
A
CC A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
400
920
0.2
MAX
500
UNITS
mV
V
V
= 0
300
760
SC
SC
CC
R = 50Ω to V
(Note 6)
L
CC
Differential Output Amplitude
Output Amplitude Variation
Small Signal Bandwidth
V
OUT
P-P
= 2V
1050
1.0
∆V
V
≥ 6mV , R = 50Ω to V
(Notes 6, 7)
dB
OUT
IN
P-P
L
2.5
2.2
At minimum gain
At maximum gain
3.4
2.9
7.6
15
5.5
4.3
13
BW
(Note 3)
GHz
kHz
Low-Frequency Cutoff
Deterministic Jitter
C
CZ
= 0.1µF
50
(Note 8)
ps
P-P
2.0
0.9
10
V
V
= 920mV
= 400mV
OUT
OUT
P-P
R
≥ 2kΩ
OSM
Output Signal Monitor Voltage
V
V
OSM
(Note 6)
P-P
Output Signal Monitor Linearity
SC Input Range
0V ≤ VSC ≤ 2V (Note 6)
%
V
0
2.0
(Note 9)
Without external capacitor C
,
CG
AGC Loop Constant
RSSI Output Voltage
RSSI Linearity
16
µs
mV
%
V
= 0 (Note 10)
SC
R
≥ 2kΩ,
V
= 2mV
55
RSSI
IN
IN
P-P
RSSI
V
= 0
SC
V
= 100mV
1800
(Note 6)
P-P
2mV
6mV
≤ V ≤ 100mV
(Note 14)
2.5
2.5
12
8
P-P
P-P
IN
P-P
≤ V ≤ 100mV
IN
P-P
Minimum SD Assert Input
Maximum SD Assert Input
SD Assert Time
2
mV
P-P
P-P
100
10
mV
70
44
µs
SD Deassert Time
SD Accuracy
CG+ and CG- are open (Note 11)
(Note 12)
10
µs
%
10
10mV
≤ V ≤ 100mV
P-P
2.8
2.4
4.5
4.5
6.3
P-P
IN
SD Hysteresis
dB
2mV
≤ V ≤ 10mV
(Note 13)
P-P
IN
P-P
SD Output High Voltage
SD Output Low Voltage
EN Input Low Voltage
EN Input High Voltage
EN Input Low Current
EN Input High Current
VREF Output Voltage
Sourcing 20µA current
Sinking 2mA current
V
V
0.44
0.8
V
V
IL
IH
IL
V
2.0
V
I
V
V
= 0
10
10
µA
µA
V
IL
I
= 2.0V
IH
IH
R
≥ 40kΩ
2.0
VREF
23
Note 1: Electrical characteristics are measured or characterized using a 2 - 1PRBS at 2.7Gbps with input edge speeds ≤200ps,
unless otherwise noted. Dice are tested at T = +25°C only. All AC specifications are guaranteed by design and charac-
A
terization, unless otherwise noted.
Note 2: Supply current measurement is taken with AC-coupled inputs and excludes output currents into 50Ω loads.
Note 3: Minimum gain is defined as V = 1200mV
and V
= 400mV . Maximum gain is defined as V = 6mV
and V
P-P
OUT
P-P
P-P
IN
OUT
IN
= 920mV . Reference gain is measured at 100MHz.
P-P
Note 4: Power-supply noise rejection is characterized with a 2.7Gbps 1100 pattern on the input. It is calculated by the equation
PSNR = 20log(∆V
/ (∆V
)), where ∆V
is the change in differential output voltage because of power-supply noise.
See Power Supply Noise Rejection vs. Frequency in the Typical Operating Characteristics.
CC
OUT OUT
_______________________________________________________________________________________
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