AD807 View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'AD807' PDF : 12 Pages View PDF
AD807
DATAOUTN
DATAOUTP
CLKOUTN
CLKOUTP
C1 0.1µF
C2
0.1µF
R1 R2
100 100
C3
0.1µF
C4
0.1µF
C5
0.1µF
R3 R4
100 100
C6
0.1µF
R5 100
R6 100
R7 100
R8 100
R11
154
R9 R10
154 154
1 DATAOUTN
2 DATAOUTP
VEE 16
SDOUT 15
3 VCC2
C7
4 CLKOUTN
AVCC 14
PIN 13
5 CLKOUTP
NIN 12
C8 TP1 6 VCC1
7 CF1
AVCC 11
THRADJ 10
R12 CD
154 TP2
8 CF2
AD807
AVEE
9
SDOUT
TP7
R17 C12
3.65k 2.2µF
C11
C10
TP6
R13
THRADJ
TP5
R16
301
R14 R15
50
50
C15 C14
0.1µF 0.1µF
C13
0.1µF
NOTES
1. ALL CAPS ARE CHIP,
15pF ARE MICA.
2. 150nH ARE SMT
GND
TP4
C9
10µF
5V TP3
ABB HAFO 1A227
FC HOUSING
0.8 A/W, 0.7pF
2.5GHz
0.1µF 0.01µF
1 NC
+VS 8
2 IIN
+OUT 7
3 NC
–OUT 6
4 VBYP
–VS 5
AD8015
NC = NO CONNECT
0.1µF
10µF
50Ω 50Ω
LINE LINE
150nH
15pF
150nH 15pF
Figure 23. Low Cost 155 Mbps Fiber Optic Receiver Schematic
Table I. AD807—AD8015 Fiber Optic Receiver Circuit:
Output Bit Error Rate & Output Jitter vs. Input Power
Average Optical
Input Power
(dBm)
Output Bit
Error Rate
Output Jitter
(ps rms)
–6.4
–6.5
–6.6
–6.7
–7.0 to –35.5
–36.0
–36.5
–37.0
–38.0
–39.0
–39.2
–39.3
Loses Lock
7.5 × 10–3
9.4 × 10–4
0 × 10–14
0 × 10–14
<40
3 × 10–12
<40
4.8 × 10–10
2.8 × 10–8
1.3 × 10–5
1.0 × 10–3
1.9 × 10–3
Loses Lock
APPLICATIONS
Low Cost 155 Mbps Fiber Optic Receiver
The AD807 and AD8015 can be used together for a complete
155 Mbps Fiber Optic Receiver (Quantizer and Clock Recovery,
and Transimpedance Amplifier) as shown in Figure 23.
The PIN diode front end is connected to a single mode 1300 nm
laser source. The PIN diode has 3.3 V reverse bias, 0.8 A/W re-
sponsively, 0.7 pF capacitance, and 2.5 GHz bandwidth.
The AD8015 outputs (POUT and NOUT) drive a differential, con-
stant impedance (50 Ω) low-pass filter with a 3 dB cutoff of
100 MHz. The outputs of the low-pass filter are ac coupled to
the AD807 inputs (PIN and NIN). The AD807 PLL damping
factor is set at 7 using a 0.22 µF capacitor.
Figure 24. Receiver Output (Data) Eye Diagram,
–7.0 dBm Optical Input
Figure 25. Receiver Output (Data) Eye Diagram,
–36.0 dBm Optical Input
–10–
REV. A
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