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EP1C12F100C6ES Datasheet(PDF) 78 Page - Altera Corporation |
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EP1C12F100C6ES Datasheet(HTML) 78 Page - Altera Corporation |
78 / 104 page ![]() 4–8 Altera Corporation Preliminary January 2007 Cyclone Device Handbook, Volume 1 Power Consumption Designers can use the Altera web Early Power Estimator to estimate the device power. Cyclone devices require a certain amount of power-up current to successfully power up because of the nature of the leading-edge process on which they are fabricated. Table 4–17 shows the maximum power-up current required to power up a Cyclone device. Designers should select power supplies and regulators that can supply this amount of current when designing with Cyclone devices. This specification is for commercial operating conditions. Measurements were performed with an isolated Cyclone device on the board. Decoupling capacitors were not used in this measurement. To factor in the current for decoupling capacitors, sum up the current for each capacitor using the following equation: I = C (dV/dt) The exact amount of current that is consumed varies according to the process, temperature, and power ramp rate. If the power supply or regulator can supply more current than required, the Cyclone device may consume more current than the maximum current specified in Table 4–17. However, the device does not require any more current to successfully power up than what is listed in Table 4–17. The duration of the ICCINT power-up requirement depends on the VCCINT voltage supply rise time. The power-up current consumption drops when the VCCINT supply reaches approximately 0.75 V. For example, if the VCCINT rise time has a linear rise of 15 ms, the current consumption spike drops by 7.5 ms. Table 4–17. Cyclone Maximum Power-Up Current (ICCINT) Requirements (In-Rush Current) Device Commercial Specification Industrial Specification Unit EP1C3 150 180 mA EP1C4 150 180 mA EP1C6 175 210 mA EP1C12 300 360 mA EP1C20 500 600 mA Notes to Table 4–17: (1) The Cyclone devices (except for the EP1C20 device) meet the power up specification for Mini PCI. (2) The lot codes 9G0082 to 9G2999, or 9G3109 and later comply to the specifications in Table 4–17 and meet the Mini PCI specification. Lot codes appear at the top of the device. (3) The lot codes 9H0004 to 9H29999, or 9H3014 and later comply to the specifications in this table and meet the Mini PCI specification. Lot codes appear at the top of the device. |
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