Instruction Manual

MAX3744/MAX3745
2.7Gbps SFP Transimpedance
Amplifiers with RSSI
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.97V to +3.63V and T
A
= -40°C to +85°C. Typical values are at V
CC
= +3.3V, source capacitance (C
IN
) = 0.85pF, and T
A
=
+25°C, unless otherwise noted.) (Notes 1, 2)
Note 1: Die parameters are production tested at room temperature only, but are guaranteed by design and characterization from
-40°C to +85°C.
Note 2: Source capacitance represents the total capacitance at the IN pad during characterization of the noise and bandwidth para-
meters.
Note 3: Guaranteed by design and characterization.
Note 4: Input-referred noise is:
Note 5: Deterministic jitter is the sum of pulse-width distortion (PWD) and pattern-dependent jitter (PDJ).
Note 6: Power-supply noise rejection PSNR = -20log(∆V
OUT
/ ∆V
CC
), where ∆V
OUT
is the differential output voltage and ∆V
CC
is the
noise on V
CC
.
Note 7:
A
IIAIIA
A
where I
II
RSSI range is from I A to A
RSSI
OUT CM IN OUT CM IN
OUT CM
OUT OUT
IN
=
=− =
=
+
=
+−
__
_
()() 400 0
400
2
6 500
µµ
µ
µµ
RMS output noise
Gain at f MHz=






100
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Single-Ended Output Common-
Mode Minimum Level (MAX3744)
Relative to V
CC
, I
IN
= 1mA
AVE
540 490 mV
Output Data Transition Time
Input > 200µA
P-P
20% to 80% rise/fall time
(Note 3)
80 140 ps
Frequency ≤ 1GHz 17
Differential Output Return Loss
1GHz < frequency ≤ 2GHz 10
TBD
f < 1MHz 46
Power-Supply Noise Rejection PSNR
I
IN
= 0
(Note 6)
1MHz ≤ f < 10MHz 34
dB
RSSI Gain (MAX3744) A
RSSI
(Note 7) 21 A/A
RSSI Gain Stability (MAX3744)
10log(A
RSSI
/A
RSSI-NOM
) where A
RSSI-NOM
=
A
RSSI
at 3.3V, +25°C (Note 3)
0.24 dB