VSC7810(2001) 查看數據表（PDF） - Vitesse Semiconductor

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VSC7810
(Rev.:2001)

Photodetector/Transimpedance Amplifier Family for Optical Communication

Vitesse Semiconductor 

VITESSE

SEMICONDUCTOR CORPORATION

Photodetector/Transimpedance Amplifier

Family for Optical Communication

Data Sheet

VSC7810

Notes on Measurement Conditions and Applications

Note 1: Noise Measurement Method

The VSC7810 is specified to operate in the following two ranges of temperature: (a) “normal” from 0°C

(ambient) to 70°C (case) and (b) “Extended” from 0°C (ambient) to 90°C (case). In the extended range, the

operating parameters are specified in Table 6.

Table 6: Specifications Under Extended Temperature Range of Operation

Symbol

Parameter

Min Typ(2) Max Units

Conditions

BW

Optical Modulation Bandwidth

800

900

-

MHz -3dB, P= -15dBm @ 50MHz

Note 2: Noise Measurement Method

3GHz BW

Hybrid Coupler

Power Meter

HP 437B

P1

P2

DUT

Board

with

8481D

Power Sensor

RMS

Output

Noise

The noise voltage, (Vn), is calculated from the Output Noise Power, (Pn), into 50Ω.

Vn = Pn • 50

The noise voltage, Vn, at the output is referred back to the noise power at the input through the responsivity

R (with R in volts/watts)

NEP = V-----n-

R

The bit error rate can be expressed as:

e (-Q2/2)

BER =

.

√2πQ

where ,

For a BER = 1×10–12 , the parameter Q = 7.

The sensitivity(s) at a bit error rate of 1×10–12 is calculated as follows:

( ) S = 10 log10

Q

NEP

1mW

,

where the NEP is in units of milliwatts and S is in dBm, respectively.

Page 8

© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012

Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com

Internet: www.vitesse.com

G52145-0, Rev 4.1

04/05/01

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