Datasheet

2 ______________________________________________________________________________________
MAX3945
1.0625Gbps to 11.3Gbps,
SFP+ Dual-Path Limiting Amplifier
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
V
CC
.......................................................................-0.3V to +4.0V
Voltage Range at SDA, SCL, CSEL,
LOS, CAZ, RPMIN ................................. -0.3V to (V
CC
+ 0.3V)
Voltage Range at ROUT+, ROUT- ........(V
CC
- 2V) to (V
CC
+ 0.3V)
Voltage Range at RIN+, RIN- ........ (V
CC
- 1.7V) to (V
CC
+ 0.3V)
Current Range Into LOS ...................................... -1mA to +5mA
Current Range Into SDA ..................................... -1mA to +1mA
Current Out of ROUT+, ROUT- ..........................................40mA
Continuous Power Dissipation (T
A
= +70NC)
16-Pin TQFN (derate 14.7mW/NC above +70NC) .........1.176W
Operating Junction Temperature Range ......... -55NC to +150NC
Storage Temperature Range ............................ -65NC to +160NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
ELECTRICAL CHARACTERISTICS
(V
CC
= 2.85V to 3.63V, CML receiver output is AC-coupled to differential 100I load, C
CAZ
= 0.1FF, T
A
= -40NC to +85NC. Registers
are set to default values, unless otherwise noted. Typical values are at V
CC
= 3.3V, T
A
= +25NC, unless otherwise noted.)
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER SUPPLY
Power-Supply Current I
CC
Includes the CML output current,
V
DIFF_ROUT
= 400mV
P-P
, RXDE_EN = 0,
LOS1_EN = 1, LOS2_EN = 0
46.6 62
mA
Includes the CML output current,
V
DIFF_ROUT
= 400mV
P-P
, RXDE_EN = 0,
LOS1_EN = 0, LOS2_EN = 1
39.4 52.5
Power-Supply Voltage V
CC
2.85 3.63 V
Power-Supply Noise
f < 10MHz 100
mV
P-P
10MHz < f < 20MHz 10
GENERAL
Input Data Rate 1.06 10.32 11.3 Gbps
Input/Output SNR 14.1
BER 10E-12
POWER-ON RESET (POR)
POR Deassert Threshold 2.55 2.75 V
POR Assert Threshold 2.3 2.45 V
INPUT SPECIFICATIONS
Differential Input Resistance
RIN+/RIN-
R
IN_DIFF
75 100 125
I
Input Sensitivity
(Note 1)
V
INMIN
RATE_SEL = 1, input transition time 25ps,
10.32Gbps, PRBS23-1 pattern
4 8
mV
P-P
RATE_SEL = 0, input transition time 260ps,
1.25Gbps, K28.5 pattern
1 2
Input Overload V
INMAX
1.2 V
P-P
Input Return Loss
SDD11
DUT is powered on, f P 5GHz
10
dB
DUT is powered on, f P 16GHz
7
SCC11
DUT is powered on, 1GHz < f P 5GHz
13
dB
DUT is powered on, 1GHz < f P 16GHz
5
RPMIN Input-Current High I
IH
LOS1_EN = 0 and LOS2_EN = 1,
V
RPMIN
= 2V
50 nA