DS681 Datasheet, PDF (10/56 Pages) Xilinx, Inc – Fast look-ahead carry logic

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Quiescent Current Requirements
Table 10: Quiescent Supply Current Characteristics
Symbol
I_CCINTQ
I_CCOQ
I_CCAUXQ
Description
Quiescent V_CCINT supply current
Quiescent V_CCO supply current
Quiescent V_CCAUX supply current
Device
XA3S200A
XA3S400A
XA3S700A
XA3S1400A
XA3S200A
XA3S400A
XA3S700A
XA3S1400A
XA3S200A
XA3S400A
XA3S700A
XA3S1400A
Typical⁽²⁾
7
10
13
24
0.2
0.3
0.3
0.3
5
5
6
10
I-Grade
Maximum⁽²⁾
70
125
185
310
3
4
4
4
15
24
34
58
Q-Grade
Maximum⁽²⁾
110
230
330
580
4
5
5
5
20
40
60
95
Units
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
Notes:
1. The numbers in this table are based on the conditions set forth in Table 8.
2. Quiescent supply current is measured with all I/O drivers in a high-impedance state and with all pull-up/pull-down resistors at the I/O pads
disabled. Typical values are characterized using typical devices at ambient room temperature (T_A of 25°C at V_CCINT = 1.2V, V_CCO = 3.3V, and
V_CCAUX = 2.5V). The maximum limits are tested for each device at the respective maximum specified junction temperature and at maximum
voltage limits with V_CCINT = 1.26V, V_CCO = 3.6V, and V_CCAUX = 3.6V. The FPGA is programmed with a “blank” configuration data file (that is,
a design with no functional elements instantiated). For conditions other than those described above (for example, a design including
functional elements), measured quiescent current levels will be different than the values in the table.
3. There are two recommended ways to estimate the total power consumption (quiescent plus dynamic) for a specific design: a) The
Spartan-3A FPGA XPower Estimator provides quick, approximate, typical estimates, and does not require a netlist of the design. b) XPower
Analyzer uses a netlist as input to provide maximum estimates as well as more accurate typical estimates.
4. The maximum numbers in this table indicate the minimum current each power rail requires in order for the FPGA to power-on successfully.
5. For information on the power-saving Suspend mode, see XAPP480: Using Suspend Mode in Spartan-3 Generation FPGAs. Suspend mode
typically saves 40% total power consumption compared to quiescent current.
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DS681 (v1.1) February 3, 2009
Product Specification