Virtex-5 FPGA Data Sheet: DC and Switching Characteristics
DS202 (v5.3) May 5, 2010
Product Specification
20
GTX_DUAL Tile DC Input and Output Levels
Table 40 summarizes the DC output specifications of the GTX_DUAL tiles in Virtex-5 FPGAs.
Figure 6 shows the single-
ended output voltage swing.
Figure 7 shows the peak-to-peak differential output voltage.
Consult
UG198:Virtex-5 FPGA RocketIO GTX Transceiver User Guide for further details.
Table 39: GTX_DUAL Tile Quiescent Supply Current
Symbol
Description
Typ(1)
Max
Units
IAVTTTXQ
Quiescent MGTAVTTTX (transmitter termination) supply current
8.2
21.6
mA
IAVCCPLLQ
Quiescent MGTAVCCPLL (PLL) supply current
0.8
4.8
mA
IAVTTRXQ
Quiescent MGTAVTTRX (receiver termination) supply current. Includes
MGTAVTTRXCQ.
1.2
12.0
mA
IAVCCQ
Quiescent MGTAVCC (analog) supply current
9.0
50.4
mA
Notes:
1.
Typical values are specified at nominal voltage, 25°C.
2.
Device powered and unconfigured.
3.
Currents for conditions other than values specified in this table can be obtained by using the XPOWER Estimator (XPE) or XPOWER
Analyzer (XPA) tools.
4.
GTX_DUAL tile quiescent supply current for an entire device can be calculated by multiplying the values in this table by the number of
available GTX_DUAL tiles in the target TXT or FXT device.
Table 40: GTX_DUAL Tile DC Specifications
Symbol
DC Parameter
Conditions
Min
Typ
Max
Units
DVPPIN
Differential peak-to-peak input
voltage
External AC coupled
≤ 4.25 Gb/s
125
1800
mV
External AC coupled
> 4.25 Gb/s
125
1800
mV
VIN
Absolute input voltage
DC coupled
MGTAVTTRX = 1.2V
–400
MGTAVTTRX +400
up to 1320
mV
VCMIN
Common mode input voltage
DC coupled
MGTAVTTRX = 1.2V
800
mV
DVPPOUT
Differential peak-to-peak output
voltage(1)
TXBUFDIFFCTRL = 111
1400
mV
VSEOUT
Single-ended output voltage
swing(1)
TXBUFDIFFCTRL = 111
700
mV
VCMOUT
Common mode output voltage
Equation based
MGTAVTTTX = 1.2V
1200–DVPPOUT/2
mV
RIN
Differential input resistance
85
100
120
Ω
ROUT
Differential output resistance
85
100
120
Ω
TOSKEW
Transmitter output skew
2
8
ps
CEXT
Recommended external AC coupling capacitor(2)
75
100
200
nF
Notes:
1.
The output swing and preemphasis levels are programmable using the attributes discussed in
UG198:Virtex-5 FPGA RocketIO GTX
Transceiver User Guide and can result in values lower than reported in this table.
2.
Values outside of this range can be used as appropriate to conform to specific protocols and standards.
X-Ref Target - Figure 6
Figure 6: Single-Ended Output Voltage Swing
0
+V
P
N
VSEOUT
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