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VSC7969 Datasheet(PDF) 2 Page - Vitesse Semiconductor Corporation

Part No. VSC7969
Description  3.125Gb/s Integrated Transimpedance and Limiting Amplifier with Signal Detect
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Maker  VITESSE [Vitesse Semiconductor Corporation]
Homepage  http://www.vitesse.com
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VSC7969 Datasheet(HTML) 2 Page - Vitesse Semiconductor Corporation

 
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VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7969
3.125Gb/s Integrated Transimpedance
and Limiting Amplifier with Signal Detect
Page 2
G52355-0, Rev 2.0
02/09/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Electrical Characteristics
Table 1: AC Specifications
Symbol
Parameter
Min
Typ
Max
Units
Conditions
∆I
PH
Input Photocurrent Swing
2.2
mA
Peak-to-peak AC current
amplitude
IPHS-AVG
Average Photocurrent Sensitivity
4
µA
-23dBm average optical power
with a detector responsitivity of
0.8A/W.
IPHS-PEAK
Peak Input Photocurrent Sensitivity
8
µA
-23dBm average optical power
with a detector responsitivity of
0.8A/W.
∆V
OUT-SE
Single-Ended Output Voltage
Amplitude
200
250
300
mV
Single-ended peak-to-peak
measurement, IIN >20µA.
∆V
OUT-DIFF
Differential Output Voltage Amplitude
400
500
600
mV
Differential peak-to-peak
measurement, IIN >20µA.
tR, tF
Rise and Fall Time
60
100
ps
At 2.2mAp-p input photocurrent
swing. 20% to 80%.
ZT
(1)
Transimpedance Gain
20k
27k
40k
Differential measurement
∆Z
T
(1)
Ripple in Passband Transimpedance
1
dB
Modulation frequency between FL
and BW
BW
Upper -3dB Bandwidth
2.2
2.5
3.0
GHz
Referenced to 10MHz,
CPD = 0.6pF
FL
Lower -3dB Cutoff Frequency
100
kHz
Referenced to 10MHz, CPD =
0.6pF with no external
components
ZO
Output Impedance
50
Single-ended
PSRR
Power Supply Rejection Ratio
TBD
INOISE
Input-Referred rms Noise Current
500
nA
30kHz to 2.5GHz
CPD
Photodetector Capacitance
0.4
0.6
0.8
pF
Bias voltage on detector at 2.0V
SDH
Signal Detect Hysterisis
1
2
4
dB
Electrical measurement on SD pin
SDA-OPEN
Signal Detect Assertion Level
3
5
9
µA
Average photocurrent with SD
open.
SDD-OPEN
Signal Detect Deasseration Level
1.0
2.2
3.0
µA
Average photocurrent with SD
open.
SDA-SHORT
Signal Detect Asseration Level
6
10
18
µA
Average photocurrent with SD
shorted to ground.
SDD-SHORT
Signal Detect Deasseration Level
2.0
4.4
6.0
µA
Average photocurrent with SD
shorted to ground.
SDHIGH
Signal Detect HIGH Logic Level
VCCS
- 0.3
V
SDLOW
Signal Detect LOW Logic Level
0.5
0.8
V


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