ADSP-2185LKST-160 Analog Devices Inc, ADSP-2185LKST-160 Datasheet - Page 37

• Manufacturer Part Number: ADSP-2185LKST-160
• Description: IC DSP CONTROLLER 16BIT 100LQFP
• Manufacturer: Analog Devices Inc
• Series: ADSP-21xxr
• Type: Fixed Pointr

Specifications of ADSP-2185LKST-160

• Rohs Status: RoHS non-compliant
• Interface: Host Interface, Serial Port
• Clock Rate: 40MHz
• Non-volatile Memory: External
• On-chip Ram: 80kB
• Voltage - I/o: 3.30V
• Voltage - Core: 3.30V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Device Core Size: 16b
• Format: Fixed Point
• Clock Freq (max): 40MHz
• Mips: 40
• Device Input Clock Speed: 40MHz
• Ram Size: 80KB
• Program Memory Size: 48KB
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 100
• Package Type: LQFP
• Lead Free Status / Rohs Status: Not Compliant

POWER DISSIPATION
To determine total power dissipation in a specific application,
the following equation should be applied for each output:
where:
C is load capacitance.
f is the output switching frequency.
Example: In an application where external data memory is used
and no other outputs are active, power dissipation is calculated
as follows:
Table 27. Example Power Dissipation Calculation
1
Parameters
Address, DMS
Data Output, WR
RD
CLKOUT
Total power dissipation for this example is P
C
V
DD
2
f
8
9
1
1
No. of Pins
INT
+ 50.7 mW.
ADSP-2184L/ADSP-2185L/ADSP-2186L/ADSP-2187L
Rev. C | Page 37 of 48 | January 2008
1
× C (pF)
10
10
10
10
× V
3.3
3.3
3.3
3.3
Assumptions:
where:
P
Figure 31 on Page
(C
Table
2
2
2
2
DD
INT
• External data memory is accessed every cycle with 50% of
• External data memory writes occur every other cycle with
• Each address and data pin has a 10 pF total load at the pin.
• Application operates at V
2
the address pins switching.
50% of the data pins switching.
(V)
is the internal power dissipation from
V
Total Power Dissipation = P
27.
DD
2
f) is calculated for each output, as in the example in
39.
× f (MHz)
33.3
16.67
16.67
33.3
DD
= 3.3 V and t
INT
+ (C
Figure 28
V
PD (mW)
29.0
16.3
= 50.7
DD
1.8
3.6
CK
2
= 30 ns.
f)
through