MAX3272A MAXIM [Maxim Integrated Products], MAX3272A Datasheet - Page 9

• Manufacturer Part Number: MAX3272A
• Description: +3.3V, 2.5Gbps Low-Power Limiting Amplifiers
• Manufacturer: MAXIM [Maxim Integrated Products]

NOTE: EXPOSED PAD MUST BE CONNECTED TO SUPPLY GROUND.
NOTE: EXPOSED PAD MUST BE CONNECTED TO SUPPLY GROUND.
TOP VIEW
GND
GND
GND
GND
IN+
IN+
IN-
IN-
TH
TH
1
2
3
4
5
1
2
3
4
5
_______________________________________________________________________________________
20
20
6
6
+
THIN QFN*
19
19
MAX3272A
MAX3272A
MAX3272/
7
7
QFN*
Pin Configuration
18
18
8
8
17
17
9
9
16
10
16
10
15
14
13
12
11
15
14
13
12
11
V
OUT+
OUT-
V
LEVEL
V
OUT+
OUT-
V
LEVEL
CC
CC
CC
CC
+3.3V, 2.5Gbps Low-Power
In an optical receiver, the electrical power change at the
limiting amplifier is 2 times the optical power change.
As an example, if a receiver’s optical input power (x)
increases by a factor of two, and the preamplifier is lin-
ear, then the voltage input to the limiting amplifier also
increases by a factor of two.
The optical power change is 10log(2x / x) = 10log(2) =
+3dB.
At the limiting amplifier, the electrical power change is:
The MAX3272 typical voltage hysteresis is 3.3dB. This
provides an optical hysteresis of 1.65dB.
Coordinates are for the center of the pad.
Coordinate 0, 0 is the lower left corner of the passivation open-
ing for pad 5.
10log
PAD
10
11
12
13
14
15
16
17
18
19
20
21
1
2
3
4
5
6
7
8
9
(
2V
V
IN
Limiting Amplifiers
IN
2
)
2
/ R
/ R
IN
Applications Information
IN
SQUELCH
OUTPOL
NAME
LEVEL
CLOS
OUT+
CAZ2
CAZ1
OUT-
GND
GND
GND
LOS
LOS
N.C.
V
V
V
V
IN+
IN-
TH
=
CC
CC
CC
CC
10log(2 )
Pad Coordinates
2
Optical Hysteresis
=
COORDINATES (µm)
20log(2)
1119, 1042
1063, -154
1331, 212
1331, 421
1331, 573
1331, 780
957, 1042
773, 1042
583, 1042
422, 1042
268, 1042
255, -154
436, -154
645, -154
850, -154
1331, 37
47, 836
47, 603
47, 425
47, 237
47, 47
= +
6dB
9