adsp-21991 Analog Devices, Inc., adsp-21991 Datasheet - Page 17

• Manufacturer Part Number: adsp-21991
• Description: Mixed Signal Dsp Controller
• Manufacturer: Analog Devices, Inc.

SPECIFICATIONS
Specifications subject to change without notice.
RECOMMENDED OPERATING CONDITIONS—ADSP-21991BBC
1
2
3
4
RECOMMENDED OPERATING CONDITIONS—ADSP-21991BST
1
2
3
4
REV. 0
Parameter
V
V
AVDD
CCLK
HCLK
CLKIN
T
T
Parameter
V
V
AVDD
CCLK
HCLK
CLKIN
T
T
The HCLK frequency may be made to appear at the dedicated CLKOUT pin of the device. For low power operation, however, the CLKOUT pin can be
The peripherals operate at the HCLK rate, which may be selected to be equal to CCLK or CCLK 2, up to a maximum of a 75 MHz HCLK for the
In order to attain the correct CCLK and HCLK values, the input clock frequency or crystal frequency depends on the internal operation of the clock
The maximum junction temperature is limited to 140°C in order to meet all of the electrical specifications. It is ultimately the responsibility of the user to
The HCLK frequency may be made to appear at the dedicated CLKOUT pin of the device. For low power operation, however, the CLKOUT pin can be
The peripherals operate at the HCLK rate, which may be selected to be equal to CCLK or CCLK 2, up to a maximum of an 80 MHz HCLK for the
In order to attain the correct CCLK and HCLK values, the input clock frequency or crystal frequency depends on the internal operation of the clock
The maximum junction temperature is limited to 140°C in order to meet all of the electrical specifications. It is ultimately the responsibility of the user to
disabled.
generation PLL circuit and the associated frequency ratio.
ensure that the power dissipation of the ADSP-21991 (including all dc and ac loads) is such that the maximum junction temperature limit of 140°C is not
exceeded.
disabled.
ADSP-21991BST.
generation PLL circuit and the associated frequency ratio.
ensure that the power dissipation of the ADSP-21991 (including all dc and ac loads) is such that the maximum junction temperature limit of 140°C is not
exceeded.
ADSP-21991BBC.
DDINT
DDEXT
DDINT
DDEXT
JUNC
AMB
JUNC
AMB
4
4
1, 2
1, 2
3
3
Internal (Core) Supply Voltage
External (I/O) Supply Voltage
Analog Supply Voltage
DSP Instruction Rate, Core Clock
Peripheral Clock Rate
Input Clock Frequency
Silicon Junction Temperature
Ambient Operating Temperature
Internal (Core) Supply Voltage
External (I/O) Supply Voltage
Analog Supply Voltage
DSP Instruction Rate, Core Clock
Peripheral Clock Rate
Input Clock Frequency
Silicon Junction Temperature
Ambient Operating Temperature
–17–
Min
2.375
3.135
2.375
0
0
–40
Min
2.375
3.135
2.375
0
0
–40
0
0
Typ
2.5
3.3
2.5
Typ
2.5
3.3
2.5
Max
2.625
3.465
2.625
150
75
150
+140
+85
Max
2.625
3.465
2.625
160
80
160
+140
+85
ADSP-21991
Unit
V
V
V
MHz
MHz
MHz
ºC
ºC
Unit
V
V
V
MHz
MHz
MHz
ºC
ºC