ATA01501
210
1.44
1.24
1.04
.84
B(3dB) A/2π Rf(Cin +Ct)
≈
200
VDD = 5.5 V
VDD = 5.5 V
190
VDD = 5.0 V
180
.64
Rf
.44
170
VDD = 4.5 V
.24
V
DD = 4.5 V
160
50
IIN
.04
150
0
- 2.1
- 1.6
- 1.1
- 0.6
- 0.1
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6
CT(pF)
IIN (mA DC)
Figure 9: Bandwidth vs. IIN
Figure 7: Bandwidth vs. CT
o
Note: All performance curves are typical @ T =25
A
unless otherwise noted.
C
VOUT Connection
IIN Connection
The output pad should be connected via a coupling
capacitor to the next stage of the receiver channel
(filter or decision circuits), as the output buffers are
not designed to drive a DC coupled 50 ohm load
(this would require an output bias current of
approximately 36 mA to maintain a quiescent 1.8
(Refer to the equivalent circuit diagram.) Bonding
the detector cathode to IIN (and thus drawing current
from the ATA00501) improves the dynamic range.
Although the detector may be used in the reverse
direction for input currents not exceeding 25 mA, the
specifications for optical overload will not be met.
Volts across the output load). If V
is connected
OUT
to a high input impedance decision circuit (>500
ohms), then a coupling capacitor may not be
required, although caution should be exercised since
DC offsets of the photo detector/TIA combination may
cause clipping of subsequent gain or decision
circuits.
25
22
19
16
13
3.4
50
IIN
3.2
Heavy AGC
3.0
Output Collapse
10
7
2.9
2.7
2.5
(
2.4
VDD = 5.5 V
VDD = 5.5 V
2.2
Linear Region
2.0 o
4
1.9
1.7
1.5
1.4
1.2
1.0
0.8
0.7
0.5
0.3
0.2
0.0
f
R
1
VDD = 4.5 V
IIN
VDD = 4.5 V
-2.1
-1.6
-1.1
-0.6
-0.1
vOUT
I
(mA DC)
IN
Figure 8: Transimpedance vs. IIN
-4
- 3
- 2
- 1
IIN (mA DC)
Figure 10: VOUT vs. IIN
PRELIMINARY DATA SHEET - Rev 1.6
6
08/2001
ANADIGICS [ ANADIGICS, INC ]
