參數(shù)資料
型號(hào)： ADSP-21991BSTZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 15/44頁(yè)
文件大?。?/td> 0K
描述： IC DSP CONTROLLER 16BIT 176-LQFP
產(chǎn)品變化通告： Product Discontinuance 27/Oct/2011
標(biāo)準(zhǔn)包裝： 1
系列： ADSP-21xx
類(lèi)型： 定點(diǎn)
接口： SPI，SSP
時(shí)鐘速率： 160MHz
非易失內(nèi)存： 外部
芯片上RAM： 112kB
電壓 - 輸入/輸出： 3.30V
電壓 - 核心： 2.50V
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 176-LQFP
供應(yīng)商設(shè)備封裝： 176-LQFP（24x24）
包裝： 托盤(pán)
ADSP-21991
–22–
REV. 0
ABSOLUTE MAXIMUM RATINGS
ESD SENSITIVITY
TIMING SPECIFICATIONS
This section contains timing information for the DSP external
signals. Use the exact information given. Do not attempt to derive
parameters from the addition or subtraction of other information.
While addition or subtraction would yield meaningful results for
an individual device, the values given in this data sheet reflect
statistical variations and worst cases. Consequently, parameters
cannot be added meaningfully to derive longer times.
Switching characteristics specify how the processor changes its
signals. No control is possible over this timing; circuitry external
to the processor must be designed for compatibility with these
signal characteristics. Switching characteristics indicate what the
processor will do in a given circumstance. Switching character-
istics can also be used to ensure that any timing requirement of
a device connected to the processor (such as memory) is satisfied.
Timing requirements apply to signals that are controlled by
circuitry external to the processor, such as the data input for a
read operation.Timing requirements guarantee that the
processor operates correctly with other devices.
Internal (Core) Supply Voltage
1 (V
DDINT) . . –0.3 V to +3.0 V
1 Stresses greater than those listed above may cause permanent damage to the
device. These are stress ratings only; functional operation of the device at these
or any other conditions greater than those indicated in the operational sections
of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
External (I/O) Supply Voltage
1 (V
DDEXT) . . . –0.3 V to +4.6 V
Input Voltage
1, 2 (V
IL–VIH) . . . . . . . . . . . . . –0.5 V to + 5.5 V
2 Except CLKIN and analog pins.
Output Voltage Swing
1, 2 (V
OL–VOH) . . . . . . –0.5 V to + 5.5 V
Load Capacitance
1 (C
L). . . . . . . . . . . . . . . . . . . . . . 200 pF
Core Clock Period
1 (t
CCLK). . . . . . . . . . . . . . . . . . . . 6.25 ns
Core Clock Frequency
1 (f
CCLK)
. . . . . . . . . . . . . . 160 MHz
Peripheral Clock Period
1 (t
HCLK)
. . . . . . . . . . . . . . . 12.5 ns
Peripheral Clock Frequency
1 (f
HCLK) . . . . . . . . . . . 80 MHz
Storage Temperature Range
1 (T
STORE) . . . .–65C to +150C
Lead Temperature (5 seconds)
1 (T
LEAD) . . . . . . . . . . . 185C
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V
readily accumulate on the human body and test equipment and can discharge without
detection. Although the ADSP-21991 features proprietary ESD protection circuitry,
permanent damage may occur on devices subjected to high energy electrostatic
discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
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