DS705 Datasheet, PDF (10/54 Pages) Xilinx, Inc – Integrated adder for complex multiply or multiply-add operation

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XA Spartan-3A DSP Automotive FPGA Family Data Sheet
Quiescent Current Requirements
Table 10: Quiescent Supply Current Characteristics
Symbol
Description
Device
I_CCINTQ Quiescent V_CCINT supply current
I_CCOQ Quiescent V_CCO supply current
I_CCAUXQ Quiescent V_CCAUX supply current
XA3SD1800A
XA3SD3400A
XA3SD1800A
XA3SD3400A
XA3SD1800A
XA3SD3400A
Typical⁽²⁾
41
64
0.4
0.4
25
39
I-Grade
Maximum⁽²⁾
500
725
5
5
110
160
Q-Grade
Maximum⁽²⁾
900
-
5
-
145
-
Units
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 DSP 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.
DS705 (v1.1) January 20, 2009
www.xilinx.com
Product Specification
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