參數(shù)資料
型號： CPS1027-J
英文描述： Telecommunication IC
中文描述： 通信集成電路
文件頁數(shù)： 47/64頁
文件大?。?/td> 870K
代理商： CPS1027-J
Agere Systems Inc.
Data Sheet
January 2002
CSP1027 Voice Band Codec for
Cellular Handset and Modem Applications
47
8 Device Characteristics
8.1 Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
External leads can be bonded and soldered safely at temperatures of up to 300 °C.
Voltage Range on any Pin with Respect to Ground.................................................................–0.5 V to +6 V
Power Dissipation................................................................................................................................. 0.3 W
Ambient Temperature Range...............................................................................................–40 °C to +85 °C
Storage Temperature Range
....................................................................................................... –
65 °C to +150 °C
8.2 Handling Precautions
All MOS devices must be handled with certain precautions to avoid damage due to the accumulation of static
charge. Although input protection circuitry has been incorporated into the devices to minimize the effect of this
static buildup, proper precautions should be taken to avoid exposure to electrostatic discharge during handling and
mounting. Agere employs a human-body model for ESD-susceptibility testing. Since the failure voltage of electronic
devices is dependent on the current, voltage, and, hence, the resistance and capacitance, it is important that stan-
dard values be employed to establish a reference by which to compare test data. Values of 100 pF and 1500
are
the most common and are the values used in the Agere human-body model test circuit. The breakdown voltage for
the CSP1027 is greater than 1000 V.
8.3 Recommended Operating Conditions
8.3.1 Package Thermal Considerations
The recommended operating temperature specified above is based on the maximum power, package type, and
maximum junction temperature. The following equation describes the relationship between these parameters. Cer-
tain applications' maximum power may be less than the worst-case value and can use this relationship to determine
the maximum ambient temperature allowed.
T
A
= T
J
– P x
Θ
JA
Maximum Junction Temperature (T
J
) in 44-Pin QFP...........................................................................125 °C
44-pin QFP Maximum Thermal Resistance in Still-Air-Ambient (
Θ
JA
).............................................. 39 °C/W
Maximum Junction Temperature (T
J
) in 48-Pin TQFP.........................................................................125 °C
48-pin TQFP Maximum Thermal Resistance in Still-Air-Ambient (
Θ
JA
) ........................................... 90 °C/W
Table 11. Recommended Operating Conditions
Parameter
Symbol
V
DDA
V
DD
T
A
Min
4.5
2.7
–40
Max
5.5
5.5
85
Unit
V
V
°C
Analog Supply Voltage
Digital Supply Voltage
Ambient Temperature
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