ADSP-2187LKST-210 Analog Devices Inc, ADSP-2187LKST-210 Datasheet - Page 43

• Manufacturer Part Number: ADSP-2187LKST-210
• Description: IC DSP CONTROLLER 16BIT 100TQFP
• Manufacturer: Analog Devices Inc
• Series: ADSP-21xxr
• Type: Fixed Pointr

Specifications of ADSP-2187LKST-210

• Rohs Status: RoHS non-compliant
• Interface: Host Interface, Serial Port
• Clock Rate: 52MHz
• Non-volatile Memory: External
• On-chip Ram: 160kB
• Voltage - I/o: 3.30V
• Voltage - Core: 3.30V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-TQFP, 100-VQFP

TEST CONDITIONS
Figure 44
(except output disable/enable).
Output Disable Time
Output pins are considered to be disabled when they have
stopped driving and started a transition from the measured out-
put high or low voltage to a high impedance state. The output
disable time (t
shown in
ence signal reaches a high or low voltage level to when the
output voltages have changed by 0.5 V from the measured out-
put high or low voltage.
The decay time, t
and the current load, i
mated by the following equation:
from which
is calculated. If multiple pins (such as the data bus) are disabled,
the measurement value is that of the last pin to stop driving.
Output Enable Time
Output pins are considered to be enabled when they have made
a transition from a high-impedance state to when they start
driving. The output enable time (t
a reference signal reaches a high or low voltage level to when the
output has reached a specified high or low trip point, as shown
in
the measurement value is that of the first pin to start driving.
Figure 44. Voltage Reference Levels for AC Measurements (Except Output
Figure
OUTPUT
INPUT
OR
45. If multiple pins (such as the data bus) are enabled,
Figure
shows voltage reference levels for all ac measurements
DIS
1.5V
) is the difference of t
45. The time is the interval from when a refer-
DECAY
t
DIS
t
DECAY
L
, is dependent on the capacitive load, C
=
, on the output pin. It can be approxi-
t
Enable/Disable)
MEASURED
=
C
----------------------- -
L
ENA
×
i
L
–
) is the interval from when
0.5V
MEASURED
t
DECAY
and t
1.5V
ADSP-2184L/ADSP-2185L/ADSP-2186L/ADSP-2187L
Rev. C | Page 43 of 48 | January 2008
DECAY
, as
L
,
ENVIRONMENTAL CONDITIONS
Table 28. Thermal Resistance
1
Figure 46. Equivalent Loading for AC Measurements (Including All Fixtures)
Rating Description
Thermal Resistance (Case-
to-Ambient)
Thermal Resistance
(Junction-to-Ambient)
Thermal Resistance
(Junction-to-Case)
Where the ambient temperature rating (T
T
T
PD = power dissipation in W
REFERENCE
AMB
CASE
OUTPUT
(MEASURED)
(MEASURED)
= T
SIGNAL
= case temperature in °C
CASE
OUTPUT
V
– (PD × θ
V
OH
OL
PIN
TO
OUTPUT STOPS
t
t
Figure 45. Output Enable/Disable
DIS
MEASURED
DRIVING
CA
50pF
1
HIGH-IMPEDANCE STATE. TEST CONDITIONS CAUSE
THIS VOLTAGE LEVEL TO BE APPROXIMATELY 1.5V.
)
V
V
OH
OL
t
DECAY
(MEASURED) – 0.5V
(MEASURED) + 0.5V
Symbol
θ
θ
θ
CA
JA
JC
AMB
I
I
OL
OH
) is:
LQFP
(°C/W)
48
50
2
OUTPUT STARTS
1.0V
2.0V
DRIVING
t
ENA
1.5V
V
(MEASURED)
V
(MEASURED)
BGA
(°C/W)
63.3
70.7
7.4
OH
OL