VSC7878
10 Gbps Linear Transimpedance Amplifier
B L O C K D I A G R A M :
VCCPD
VCC
VCCF
DOUTP
40 W
PDCAP
10 W
FILTER1
PD
IIN
TIA
AGC
Average
Input Current
Monitor
FILTER2
IMON
GND1
GND2
DOUTN
F E A T U R E S :
B E N E F I T S :
` Integrated AGC
` Linear operation over the input power range of the device
` Enables high volume ROSA assembly
` TO-46 can die size
` Integrated photo detector bias circuit
` Provides the best RF match to the photo detector and reduces the
component count inside the ROSA
` Integrated photo current monitor
` Available in bare die
` Used for fiber alignment and diagnostic capabilities
` Fully tested, known good die
S P E C I F I C A T I O N S :
A P P L I C A T I O N S :
` Supply voltage: 3.3 V +/- 10%
` 10 G receiver optical sub-assemblies:
-9.983 Gbps SONET OC-192/SDH STM-64
-10.3 Gbps Ethernet
` Total harmonic distortion: 3% (typical)
-10.5 Gbps Fibre Channel
` Differential output swing: 500 mV (linear operation)
` Bandwidth: 8 GHz (typical)
-10.7 Gbps OTN G.709/G.975
-12.5 Gbps SONET with FEC
-DWDM SONET/SDH
` Sensitivity: -18 dBm OMA (typical)
` Transponders:
-XENPAK, X2, XPAK modules
-300-pin MSA modules
` Max input current for linear operation: 2 mA p-p (typical)
` Operating temperature from -30o to 105o C die backside
` Transceivers:
-XFP modules
VPPD-01376
Revision 1.0