Analog Devices ADSP-2183 manuals
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Analog Devices ADSP-2183 Manual
40 pages 390.22 Kb
aDSP Microcomputers ADSP-2181/ADSP-2183 12 ADSP-2181SPECIFICATIONS16 ADSP-2183SPECIFICATIONSRECOMMENDED OPERATING CONDITIONS ELECTRICAL CHARACTERISTICS 17 ADSP-2183 TIMING PARAMETERS18 ADSP-2181/ADSP-2183REV. 0 18 (C VCK DD JC JA JC JA CASE AMB Figure 16. Power vs. Frequency MODES nPOWER, IDLE POWER, IDLE POWER, INTERNAL f) is calculated for each output:# of Pins C V f Address, DMS 8 10 pF 3.3 V 33.3 MHz = 29.0 mW Data Output, WR 9 10 pF 3.3 V 16.67 MHz = 16.3 mW RD 1 10 pF 3.3 V 16.67 MHz = 1.8 mW CLKOUT 1 10 pF 3.3 V 33.3 MHz = 3.6 mW 50.7 mW Total power dissipation for this example is P + 50.7 mW. ADSP-2183ENVIRONMENTAL CONDITIONS Ambient Temperature Rating: T = T (PD ) T = Case Temperature in C PD = Power Dissipation in W = Thermal Resistance (Case-to-Ambient) = Thermal Resistance (Junction-to-Ambient) = Thermal Resistance (Junction-to-Case) Package TQFP 50C/W 2C/W 48C/W PQFP 41C/W 10C/W 31C/WFigure 15. Power-Down Supply Current (Typical) f C = load capacitance, f= output switching frequency. External data memory is accessed every cycle with 50% of the address pins switching. External data memory writes occur every other cycle with 50% of the data pins switching. Each address and data pin has a 10 pF total load at the pin. The application operates at V = 3.3 V and t = 34.7 ns. Total Power Dissipation = P + (C V f) P = internal power dissipation from Power vs. Frequency graph (Figure 16). 19 t=C 0.5V i 21 ADSP-2181/ADSP-2183
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