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ADN2843 Arkusz danych(PDF) 8 Page - Analog Devices

Numer części ADN2843
Szczegółowy opis  10.709 Gbps Laser Diode Driver Chipset
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

ADN2843 Arkusz danych(HTML) 8 Page - Analog Devices

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ADN2843
•Best high frequency board layout techniques including power and ground planes should be used.
• To minimize inductance, keep the connections between the ADN2845 and the laser diode as short as possible. Inductances <0.3 nH
are recommended for best performance. Critical bonds are IMODP and VCC (Pin 14). Ribbon bonding can be used to reduce
bond inductance. Minimize bond lengths for ADN2845 pads to achieve low inductance.
•Place bypass capacitor on laser anode as close to laser as possible.
•Bypass capacitors should be placed as close as possible to VCC pads.
• 50
controlled impedance interconnects should be used on the DATA inputs.
•Parasitic capacitance on IBIAS_CTRL and IMOD_CTRL interconnects should be less than 100 pF. If decoupling caps are used
on IBIAS_CTRL and IMOD_CTRL, they should be tied to VCC rather than GND.
• An inductor should be used in the bias current path. A Microwave Components coil 30-1847-GCCAS-01 (48 mil
24 mil) should
be used.
•The recommended substrate connection is to GND. However, the performance is not affected by connecting the substrate to VCC.
22nF
10nF
IDTONE
IBMON
IMMON
ALS
FAIL
DEGRADE
GND
ASET
ERSET
PSET
GND
IMPD
IMPDMON
IMPDMON2
ADN2844
1
8
32
25
IMPD2
GND
DATAN
GND
NC
GND
DATAP
IMODNTERM
NC
IMODP
IBIAS
ALS
GND
VCC
VCC VCC
GND
ADN2845
15
18
9
6
1
10
14
5
10nF
10k
1k
1k
22nF
24
17
9
16
VCC
10nF
10nF
100 F TANTALUM
VCC
10nF
VCC
MPD
10nF
VCC
VCC
10nF
VCC
NOTES
*FOR DIGITAL PROGRAMMING, THE ADN2850 OR ADN2860 OPTICAL SUPERVISOR CAN BE USED.
**OPTIONAL MONITORING OF CURRENTS.
1k
NC
**
**
**
**
VCC
VCC
VCC
VCC
VCC
Figure 3. ADN2843 Application Circuit (Mode A)


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