Xilinx DS610 Quiescent Current Requirements, Quiescent Supply Current Characteristics, Maximum2

DC and Switching Characteristics

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Quiescent Current Requirements

Table 9: Quiescent Supply Current Characteristics

				Typical(2)	Commercial	Industrial
Symbol	Description	Device	Power		Maximum(2)	Maximum(2)	Units
ICCINTQ	Quiescent VCCINT supply current	XC3SD1800A	C,I	55	390	500	mA
			LI	45	-	175	mA
		XC3SD3400A	C,I	80	550	725	mA
			LI	70	-	300	mA
ICCOQ	Quiescent VCCO supply current	XC3SD1800A	C,I	0.4	4	5	mA
			LI	0.2	-	5	mA
		XC3SD3400A	C,I	0.4	4	5	mA
			LI	0.2	-	5	mA
ICCAUXQ	Quiescent VCCAUX supply current	XC3SD1800A	C,I	42	90	110	mA
			LI	38	-	72	mA
		XC3SD3400A	C,I	70	130	160	mA
			LI	65	-	105	mA

Notes:

1.The numbers in this table are based on the conditions set forth in Table 7.

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 (TA of 25°C at VCCINT = 1.2V, VCCO = 3.3V, and VCCAUX = 2.5V). The maximum limits are tested for each device at the respective maximum specified junction temperature and at maximum voltage limits with VCCINT = 1.26V, VCCO = 3.6V, and VCCAUX = 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.

14	www.xilinx.com	DS610-3 (v2.0) July 16, 2007
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