AMT8504
1.25 Gb/s Integrated 850 nm MSM-TIA
PRELIMINARY DATA SHEET - Rev 1
TO-46L
Ball Lens
Package
TO-46F
Ultra Flat
Window
Package
PRODUCT DESCRIPTION
The ANADIGICS AMT8504 is a 3.3V monolithically
integrated Metal-Semiconductor-Metal (MSM)
photodetector and transimpedance amplifier (TIA)
used to convert an 850nm input optical signal into a
differential output voltage, and is manufactured in
ANADIGICS 6 GaAs wafer fabrication facility. The
integrated MSM and TIA receiver maximizes the
receiver performance by minimizing the
photodetector input parasitics to the TIA and
Figure 1: Equivalent Circuit
internally biasing the photodetector to achieve high
sensitivity, bandwidth and overload performance. As
an integrated product the reliability is inherently
better than a discrete solution, and both the MSM-TIA
integrated circuit and TO46 flat window and TO46
lens packaged receiver pass stringent reliability
requirements. These products are readily designed
into receivers and transceivers for Gigabit Ethernet
and Fibre Channel applications.
US Patents: 5047728, 5646573
Charge
Pump
7.5 GHz
Osc
AGC
OUT
OUT
V
DD
4
2
1
3
P
IN
07/01
FEATURES
Differential Output TIA
3.3V Operation
Automatic Gain Control
Integrated 850nm MSM detector & TIA
100 m Detector Diameter
TO-46 Ultra Flat Window or Lens
Hermetic Package
High Reliability
-5 to +80
C Operating Temperature Range
APPLICATIONS
Gigabit Ethernet (1.250Gb/s)
Fibre Channel (1.0625 Gb/s)
m
3
AMT8504
PRELIMINARY DATA SHEET - Rev 1
07-01
V
D
D
v
0
.
6
P
N
I
m
B
d
5
+
T
S
C
5
2
1
o
t
C
5
6
-
.
p
m
e
T
e
g
a
r
o
t
S
Table 3: Electrical Characteristics
Table 2: Absolute Maximum Ratings
ELECTRICAL CHARACTERISTICS
R
E
T
E
M
A
R
A
P
N
I
M
P
Y
T
X
A
M
T
I
N
U
)
(
h
t
g
n
e
l
e
v
a
W
0
7
7
0
5
8
0
6
8
m
n
r
e
t
e
m
a
i
D
r
o
t
c
e
t
e
D
-
0
0
1
-
m
y
ti
v
i
s
n
o
p
s
e
R
l
a
it
n
e
r
e
ff
i
D
l
a
n
g
i
S
ll
a
m
S
)
1
(
)
z
H
M
0
5
@
(
0
0
0
1
-
-
W
/
V
h
t
d
i
w
d
n
a
B
)
1
(
0
0
9
-
-
z
H
M
ff
o
t
u
C
y
c
n
e
u
q
e
r
F
w
o
L
-
-
0
0
3
z
H
k
e
c
n
a
t
s
i
s
e
R
t
u
p
t
u
O
-
0
4
-
m
h
O
d
a
o
lr
e
v
O
l
a
c
it
p
O
)
2
(
0
-
-
m
B
d
y
ti
v
it
i
s
n
e
S
l
a
c
it
p
O
)
2
(
0
2
-
2
2
-
-
m
B
d
e
g
a
tl
o
V
t
u
p
t
u
O
l
a
it
n
e
r
e
ff
i
D
)
3
(
-
0
0
0
1
-
V
m
T
E
S
I
R
T
&
L
L
A
F
)
%
0
8
-
0
2
(
)
3
(
-
0
6
2
-
s
p
n
o
it
r
o
t
s
i
D
e
l
c
y
C
y
t
u
D
)
3
(
-
4
0
1
%
)
k
p
-
k
p
(
r
e
tt
i
J
l
a
t
o
T
)
4
(
,)
3
(
-
0
8
0
2
1
s
p
t
n
e
r
r
u
C
y
l
p
p
u
S
-
-
5
5
A
m
e
g
n
a
R
e
g
a
tl
o
V
g
n
it
a
r
e
p
O
0
.
3
+
3
.
3
+
6
.
3
+
V
e
g
n
a
R
e
r
u
t
a
r
e
p
m
e
T
e
s
a
C
g
n
it
a
r
e
p
O
5
-
-
0
8
C
l
Stresses in excess of the absolute ratings may
cause permanent damage. Functional operation is
not implied under these conditions. Exposure to
absolute ratings for extended periods of time may
adversely affect reliability.
Notes:
(1) Measured at 14 dBm optical input power with output connected into R
L
= 100W
(differential)
(2) Measured at 10
-10
BER with a 2
7
-1 PRBS at 1.25 GB/s
(3) Measured with a 2
7
-1 PRBS at 1.25Gb/s, an input optical power of -3dBm and
RL=100 W (differential)
(4) 6
s
about the center eye crossing.
5
AMT8504
PRELIMINARY DATA SHEET - Rev 1
07-01
20.0
25.0
30.0
35.0
40.0
45.0
50.0
0
20
40
60
80
100
Case Temperature (C)
Supp
ly
C
u
r
r
e
nt (mA
)
3.0V
3.3V
3.6V
1000
1200
1400
1600
1800
2000
0
20
40
60
80
100
Case Temperature (C)
B
and
w
i
dt
h (
M
H
z
)
3.0V
3.3V
3.6V
1000
1200
1400
1600
1800
2000
0
20
40
60
80
100
Case Temperature (C)
D
i
f
f
er
ent
i
a
l R
e
s
p
o
nsivi
t
y
(
V
/W
)
3.0V
3.3V
3.6V
-25.00
-24.00
-23.00
-22.00
-21.00
-20.00
0
20
40
60
80
100
Case Temperature (C)
Se
ns
i
tiv
ity
(dB
m
)
3.0V
3.3V
3.6V
Figure 4: Eye Diagram with an Optical Input Power
of -17dBm
Figure 5: Eye Diagram with an Optical Input Power
of 0dBm
Figure 6: Supply Current vs. Temperature
Figure 7: Bandwidth vs. Temperature
Figure 8: Differential Responsivity vs. Temperature
Figure 9: Sensitivity vs. Temperature
PERFORMANCE DATA
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