參數(shù)資料
型號(hào)： CSP1027
元件分類： Codec
英文描述： CSP1027 Voice Band Codec for Cellular Handset and Modem Applications
中文描述： CSP1027語(yǔ)音頻帶編解碼器的蜂窩手機(jī)和調(diào)制解調(diào)器應(yīng)用
文件頁(yè)數(shù)： 50/64頁(yè)
文件大小： 937K
代理商： CSP1027
CSP1027 Voice Band Codec for
Cellular Handset and Modem Applications
Data Sheet
December 1999
Lucent Technologies Inc.
50
9 Electrical Characteristics and Requirements
(continued)
9.1 Power Dissipation
Power dissipation is highly dependent on the frequency of operation. The typical power dissipation listed is for a
selected application. The following electrical characteristics are preliminary and are subject to change.
The power dissipation listed is for internal power dissipation only. Total power dissipation can be calculated on the
basis of the application by adding C x V
DD
2
x f for each output, where C is the additional load capacitance and f is
the effective output frequency.
Power dissipation due to the input and I/O buffers is highly dependent on the input voltage level. At full CMOS lev-
els, essentially no dc current is drawn. However, for levels near the threshold of 0.5 x V
DD
, high and unstable levels
can flow. Therefore, all unused input pins should be tied inactive to V
DD
or V
SS
, and all unused I/O pins should be
tied inactive through a 10 k
resistor to V
DD
or V
SS
. Table 13 shows the input buffer power dissipation for inputs at
dc levels, V
DD or
V
SS
.
Table 13. Power Dissipation
Operating Mode
Analog Supply
(V
DDA
)
5.0 V
Typ
5.0 V
Digital Supply
(V
DD
)
3.3 V
Typ
3.3 V
5.0 V
3.0 V
Max
5.5 V
Typ
5.0 V
Max
5.5 V
Max
3.6 V
Typ
3.0 V
Max
3.3 V
Codec Active,
Crystal Osc. Disabled
(
cioc0
: ACTIVE = 1,
XOSCEN = 0,
CLK at 25 MHz,
IOCK at 6.25 MHz,
CK
OS
at 1 MHz)
Codec Inactive,
Crystal Osc. Disabled
(
cioc0
: ACTIVE = 0,
XOSCEN = 0,
CLK at 25 MHz,
IOCK at 6.25 MHz)
Codec Active,
Crystal Osc. Enabled
(
cioc0
: ACTIVE = 1,
XOSCEN = 1,
25 MHz crystal,
IOCK at 6.25 MHz,
CK
OS
at 1 MHz)
Codec Inactive,
Crystal Osc. Enabled
(
cioc0
: ACTIVE = 0,
XOSCEN = 1,
25 MHz crystal,
IOCK at 6.25 MHz)
11.0 mA
55.0 mW
12.2 mA
67.1 mW
4.6 mA
23.0 mW
5.8 mA
31.9 mW
3.0 mA
9.9 mW
3.8 mA
13.7 mW
2.8 mA
8.4 mW
3.5 mA
11.5 mW
0.01 mA
0.05 mW
0.02 mA
0.11 mW
3.7 mA
18.5 mW
4.9 mA
26.9 mW
2.5 mA
8.2 mW
3.2 mA
11.5 mW
2.2 mA
6.6 mW
2.9 mA
9.6 mW
11.0 mA
55.0 mW
12.2 mA
67.1 mW
10.2 mA
51.0 mW
11.4 mA
62.7 mW
4.1 mA
13.5 mW
5.0 mA
18.0 mW
3.9 mA
11.7 mW
4.7 mA
15.5 mW
0.01 mA
0.05 mW
0.02 mA
0.11 mW
9.3 mA
46.5 mW
10.5 mA
57.8 mW
3.6 mA
11.9 mW
4.4 mA
15.8 mW
3.3 mA
9.9 mW
4.1 mA
13.5 mW
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