AD807(RevB) View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

AD807
(Rev.:RevB)

Fiber Optic Receiver with Quantizer and Clock Recovery and Data Retiming

Analog Devices 

AD807

C1 0.1␮F

C12

R1

R2

100⍀ 100⍀

R9

R10

SDOUT

0.1␮F

C2 0.1␮F

R5 100⍀ 154⍀

154⍀

R16

J1

1 DATAOUTN

VEE 16

330⍀ C13

J2

C3 0.1␮F

C4 0.1␮F

R6 100⍀

R7 100⍀ C7 0.1␮F

2 DATAOUTP

3 VCC2

SDOUT 15

AVCC2 14

C11 0.1␮F

R14

47⍀

R15

47⍀

0.1␮F R17

3.9k⍀

120nH

2 PIN TIA

1␮F

EPITAXX

1

ERM504

J3

4 CLKOUTN

PIN 13

R8 100⍀

J4

5 CLKOUTP

NIN 12

C14

0.1␮F

30pF 30pF

C5 0.1␮F

C8

6 VCC1

AVCC1 11

C10 0.1␮F

R3

R4

100⍀ 100⍀

C6

R11

150⍀

0.1␮F

CD

R12

150⍀

7 CF1

THRADJ 10

8 CF2

AVEE 9

AD807

R13

THRADJ

NOISE FILTER

NOTE:

PIN TIA PIN 4 (CASE)

IS CONNECTED TO

0.1␮F

GROUND

C9

10␮F

5V

Figure 17. AD807 Application with Epitaxx PIN—Transimpedance Amplifier Module

The entire circuit was enclosed in a shielded box. Table I sum-

marizes results of tests performed using a 223-1 PRN Sequence,

and varying the average power at the PIN diode.

The circuit acquires and maintains lock with an average input

power as low as –39.25 dBm.

Table II. AD807—Epitaxx ERM504 PIN TIA 155 Mbps

Fiber Optic Receiver Circuit: Output Bit Error Rate and

Output Jitter vs. Average Input Power

Average Optical

Input Power

(dBm)

0

–3

–10

–20

–30

–32

–34

–35

–35.5

–36

–37.0

–37.6

–38.0

Output Bit

Error Rate

0.0 × 10–10

0.0 × 10–10

0.0 × 10–10

0.0 × 10–10

0.0 × 10–10

0.0 × 10–10

0.0 × 10–10

0.0 × 10–10

0.0 × 10–10

0.0 × 10–10

0.0 × 10–10

0.5 × 10–10

4 × 10–6

Output Jitter

(ps rms)

29

35

40

37

33

35

36

39

40

41

42

43

50

SONET (OC-3)/SDH (STM-1) Fiber Optic Receiver Circuit

A light wave receiver circuit for SONET/SDH application at

155 Mbps is shown in Figure 17, with test results given in Table

II. The circuit operates from a single 5 V supply, and uses two

major components: an Epitaxx ERM504 PIN-TIA module with

AGC, and the AD807 IC.

A 120 MHz, third order, low-pass Butterworth filter at the

output of the PIN-TIA module provides adequate bandwidth

(70% of the bit rate), and attenuates high frequency (out of

band) noise.

250mV

50mV/

DIV

–250mV

38.12ns

1ns/DIV

48.12ns

Figure 18. Receiver Output (Data) Eye Diagram,

0 dBm Optical Input

250mV

50mV/

DIV

–250mV

38.12ns

1ns/DIV

48.12ns

Figure 19. Receiver Output (Data) Eye Diagram,

–38 dBm Optical Input

REV. B

–11–

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