ADSP-2183KST-115 Analog Devices Inc, ADSP-2183KST-115 Datasheet - Page 25

• Manufacturer Part Number: ADSP-2183KST-115
• Description: IC DSP CONTROLLER 16BIT 128LQFP
• Manufacturer: Analog Devices Inc
• Series: ADSP-21xxr
• Type: Fixed Pointr

Specifications of ADSP-2183KST-115

• Rohs Status: RoHS non-compliant
• Interface: Synchronous Serial Port (SSP)
• Clock Rate: 28.8MHz
• Non-volatile Memory: External
• On-chip Ram: 80kB
• Voltage - I/o: 3.30V
• Voltage - Core: 3.30V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 128-LQFP

CAPACITIVE LOADING
Figures 22 and 23 show the capacitive loading characteristics of
the ADSP-2183.
TEST CONDITIONS
Output Disable Time
Output pins are considered to be disabled when they have
stopped driving and started a transition from the measured
output high or low voltage to a high impedance state. The out-
put disable time (t
as shown in the Output Enable/Disable diagram. The time is the
interval from when a reference signal reaches a high or low
voltage level to when the output voltages have changed by 0.5 V
from the measured output high or low voltage. The decay time,
t
load, i
lowing equation:
from which
DECAY
NOMINAL
L
, is dependent on the capacitive load, C
, on the output pin. It can be approximated by the fol-
25
20
15
10
18
16
14
12
10
–2
–4
–6
5
0
8
6
4
2
0
0
V
T = +85 C
DD
20
= 3.0V
DIS
t
40
DIS
40
) is the difference of t
t
DECAY
= t
60
MEASURED
80
80
=
C
C
100
C
L
L
L
– pF
– pF
• 0.5V
i
– t
L
120
120
DECAY
140
MEASURED
L
160
160
, and the current
180
and t
200
200
DECAY
,
is calculated. If multiple pins (such as the data bus) are dis-
abled, 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 Output Enable/Disable diagram. If multiple pins (such as
the data bus) are enabled, the measurement value is that of the
first pin to start driving.
ENVIRONMENTAL CONDITIONS
Ambient Temperature Rating:
Package
LQFP
Mini-BGA
REFERENCE
T
T
PD = Power Dissipation in W
θ
θ
θ
OUTPUT
CA
JA
JC
(MEASURED)
AMB
CASE
(MEASURED)
OUTPUT
SIGNAL
= Thermal Resistance (Junction-to-Ambient)
= Thermal Resistance (Junction-to-Case)
= Thermal Resistance (Case-to-Ambient)
INPUT
= T
= Case Temperature in °C
OR
V
V
OUTPUT
OL
OH
CASE
OUTPUT STOPS
PIN
TO
t
t
MEASURED
DIS
DRIVING
– (PD × θ
50°C/W
70.7°C/W
1.5V
JA
50pF
V
V
HIGH-IMPEDANCE STATE. TEST CONDITIONS CAUSE
THIS VOLTAGE LEVEL TO BE APPROXIMATELY 1.5V.
OH
OL
t
DECAY
(MEASURED) +0.5V
(MEASURED) – 0.5V
CA
)
ENA
I
I
OH
OL
2°C/W
7.4°C/W
) is the interval from when
JC
ADSP-2183
OUTPUT STARTS
1.0V
2.0V
DRIVING
t
ENA
+1.5V
1.5V
V
(MEASURED)
V
(MEASURED)
OH
OL
48°C/W
63.3°C/W
CA