參數(shù)資料
型號(hào)： ADSP-2181
廠商： Analog Devices, Inc.
英文描述： ADSP-2100 Family DSP Microcomputers
中文描述： 的ADSP - 2100系列DSP的微機(jī)
文件頁數(shù)： 25/32頁
文件大?。?/td> 290K
代理商： ADSP-2181
ADSP-2181
–25–
REV. D
OUT PUT DRIVE CURRE NT S
Figure 19 shows typical I-V characteristics for the output drivers
of the ADSP-2181. T he curves represent the current drive
capability of the output drivers as a function of output voltage.
SOURCE VOLTAGE – Volts
S
120
–800
1
6
2
3
4
5
100
0
–20
–40
–60
80
60
20
40
5.5V, –40
8
C
5.0V, +25
8
C
4.5V, +85
8
C
4.5V, +85
8
C
5.0V, +25
8
C
5.5V, –40
8
C
Figure 19. Typical Drive Currents
POWE R DISSIPAT ION
T o determine total power dissipation in a specific application,
the following equation should be applied for each output:
C
×
V
DD
2
×
f
C
= load capacitance,
f
= output switching frequency.
E xample:
In an application where external data memory is used and no
other outputs are active, power dissipation is calculated as
follows:
Assumptions:
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.
T he application operates at V
DD
= 5.0 V and t
CK
= 30 ns.
Total Power Dissipation
=
P
INT
+
(C
×
V
DD2
×
f
)
P
INT
= internal power dissipation from Power vs. Frequency
graph (Figure 20).
TEMPERATURE –
°
C
1000
1
100
10
C
m
A
5
85
15
25
35
45
55
65
75
–5
V
DD
= 5.5V
V
DD
= 5.0V
V
DD
= 4.5V
NOTES:
1. REFLECTS ADSP-2181 OPERATION IN LOWEST POWER MODE.
(SEE “SYSTEM INTERFACE" CHAPTER OF THE ADSP-2100 FAMILY
USER'S MANUAL, THIRD EDITION, FOR DETAILS.)
2. CURRENT REFLECTS DEVICE OPERATING WITH NO OUTPUT LOADS.
Figure 20. Power-Down Supply Current (Typical)
(
C
×
V
DD
2
×
f
) is calculated for each output:
# of
Pins
×
C
×
V
DD2
×
5
2
V
×
5
2
V
×
5
2
V
×
5
2
V
×
f
Address,
DMS
Data Output,
WR
RD
CLK OUT
8
9
1
1
×
10 pF
×
10 pF
×
10 pF
×
10 pF
×
33.3 MHz
×
16.67 MHz =
×
16.67 MHz =
×
33.3 MHz
=
66.6 mW
37.5 mW
4.2 mW
8.3 mW
116.6 mW
=
T otal power dissipation for this example is P
INT
+ 116.6 mW.
1/t
CK
– MHz
P
I
)
220
30
32
42
34
36
38
40
420
370
320
270
570
470
520
2181 POWER, INTERNAL
1, 3, 4
V
DD
= 5.5V
V
DD
= 5.0V
V
DD
= 4.5V
410mW
325mW
250mW
550mW
425mW
330mW
28
P
I
)
1/t
CK
– MHz
100
40
30
32
42
34
36
38
40
70
60
50
90
80
30
POWER, IDLE
1, 2, 3
V
DD
= 5.5V
V
DD
= 5.0V
V
DD
= 4.5V
77mW
60mW
45mW
95mW
75mW
54mW
28
1/t
CK
– MHz
P
I
)
80
30
30
32
42
34
36
38
40
75
50
45
40
35
70
65
55
60
POWER, IDLE nMODES
3
IDLE
IDLE (16)
IDLE (128)
60mW
35mW
34mW
39mW
37mW
75mW
28
VALID FOR ALL TEMPERATURE GRADES.
1
POWER REFLECTS DEVICE OPERATING WITH NO OUTPUT LOADS.
4
I
MEASUREMENT TAKEN WITH ALL INSTRUCTIONS EXECUTING FROM INTERNAL
MEMORY. 50% OF THE INSTRUCTIONS ARE MULTIFUNCTION (TYPES 1, 4, 5, 12, 13, 14),
30% ARE TYPE 2 AND TYPE 6 AND 20% ARE IDLE INSTRUCTIONS.
3
TYPICAL POWER DISSIPATION AT 5.0V V
DD
AND 25
8
C EXCEPT WHERE SPECIFIED.
2
IDLE REFERS TO ADSP-2181 STATE OF OPERATION DURING EXECUTION OF IDLE
INSTRUCTION. DEASSERTED PINS ARE DRIVEN TO EITHER V
DD
OR GND.
Figure 21. Power vs. Frequency
相關(guān)PDF資料
PDF描述
ADSP-2181BST-115 DSP Microcomputer
ADSP-2181BST-133 DSP Microcomputer
ADSP2181 DSP Microcomputer
ADSP-2183KST-115 DSP Microcomputer
ADSP-2183KST-133 DSP Microcomputer
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADSP-2181BS-115 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 28.8MHz 28.8MIPS 128-Pin MQFP 制造商:Rochester Electronics LLC 功能描述:DSP W/LARGE RAM, 28.8MIPS I GRDE, PQFP - Bulk
ADSP-2181BS-133 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 33.3MHz 33.3MIPS 128-Pin MQFP 制造商:Analog Devices 功能描述:IC MICROCOMPUTER DSP
ADSP-2181BS-160 制造商:未知廠家 制造商全稱:未知廠家 功能描述:16-Bit Digital Signal Processor
ADSP2181BST115 制造商:AD 功能描述:2181 ANALOG
ADSP-2181BST-115 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 28.8MHz 28.8MIPS 128-Pin TQFP 制造商:Rochester Electronics LLC 功能描述:DSP W/LARGE RAM, 28.8MIPS I GRDE, TQFP - Bulk
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