AD807A-155BRZ 데이터 시트보기 (PDF) - Analog Devices

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AD807A-155BRZ

Fiber Optic Receiver with Quantizer and Clock Recovery and Data Retiming

Analog Devices 

AD807

C1 0.1␮F

J1

DATAOUTN

DATAOUTP

J2

J3

CLKOUTN

CLKOUTP

J4

R1

100⍀

C2 0.1␮F

R2

100⍀

C3 0.1␮F

C4 0.1␮F

C5 0.1␮F

R3

R4

100⍀ 100⍀

C2

0.1␮F

SDOUT

TP7

R9

R5 100⍀ 154⍀

R6 100⍀

R10

154⍀

1 DATAOUTN

2 DATAOUTP

VEE 16

SDOUT 15

R7 100⍀

C7

R8 100⍀

3 VCC2

4 CLKOUTN

5 CLKOUTP

AVCC2 14

PIN 13

NIN 12

R11

154⍀

6 VCC1

AVCC1 11

C8 TP1

7 CF1

THRADJ 10

CD

R12

154⍀

8 CF2

AVEE 9

TP2

AD807

R17 C12

3.65k⍀ 2.2␮F

R16

301⍀

C11

R14 R15

50⍀ 50⍀

C10

TP6

R13

THRADJ

TP5

C15

0.1␮F

C14

0.1␮F

C13

0.1␮F

NOTES:

1. ALL CAPACITORS ARE CHIP,

15pF ARE MICA.

2. 150nH ARE SMT

3. C7, C8, C10, C11 ARE 0.1␮F

BYPASS CAPACITORS

C9

10␮F

TP4

TP3

5V

ABB HAFO 1A227

FC HOUSING

0.8A/W, 0.7pF

2.5GHz

1 NC

2 IIN

3 NC

+VS 8

+OUT 7

–OUT 6

0.1␮F 0.01␮F

4 VBYP

–VS 5

AD8015

NC = NO CONNECT

0.1␮F

10␮F

50⍀

LINE

150nH

15pF

150nH

15pF

Figure 14. Low Cost 155 Mbps Fiber Optic Receiver Schematic

50⍀

LINE

Table I. AD807—AD8015 Fiber Optic Receiver Circuit:

Output Bit Error Rate and Output Jitter vs. Input Power

Average Optical

Input Power

(dBm)

–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

Output Bit

Error Rate

Loses Lock

7.5 × 10–3

9.4 × 10–4

0 × 10–14

0 × 10–14

3 × 10–12

4.8 × 10–10

2.8 × 10–8

1.3 × 10–5

1.0 × 10–3

1.9 × 10–3

Loses Lock

Output Jitter

(ps rms)

<40

<40

503mV

100mV/

DIV

–497mV

48.12ns

1ns/DIV

58.12ns

Figure 15. Receiver Output (Data) Eye Diagram,

–7.0 dBm Optical Input

503mV

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 14.

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

responsively, 0.7 pF capacitance, and 2.5 GHz bandwidth.

The AD8015 outputs (POUT and NOUT) drive a differential,

constant 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 damp-

ing factor is set at 7 using a 0.22 µF capacitor.

100mV/

DIV

–497mV

49.12ns

1ns/DIV

59.12ns

Figure 16. Receiver Output (Data) Eye Diagram,

–36.0 dBm Optical Input

–10–

REV. B

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