ADSP2115BSZ80

Manufacturer Part NumberADSP2115BSZ80
DescriptionQFP80
ManufacturerAnalog Devices
ADSP2115BSZ80 datasheet
 


Specifications of ADSP2115BSZ80

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ADSP-21xx
SPECIFICATIONS (ADSP-2101/2105/2115/2161/2163)
TEST CONDITIONS
Figure 14 shows voltage reference levels for ac measurements.
INPUT
OUTPUT
Figure 14. Voltage Reference Levels for AC Measurements
(Except Output Enable/Disable)
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
output disable time (t
) is the difference of t
DIS
t
, as shown in Figure 15. The time t
DECAY
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.
REFERENCE
SIGNAL
V
(MEASURED)
OH
OUTPUT
V
(MEASURED)
OL
Figure 16. Equivalent Device Loading for AC Measurements
(Except Output Enable/Disable)
The decay time, t
C
, and the current load, i
L
approximated by the following equation:
3.0V
1.5V
0.0V
from which
2.0V
1.5V
0.8V
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
when a reference signal reaches a high or low voltage level to
when the output has reached a specified high or low trip point,
and
as shown in Figure 15. If multiple pins (such as the data bus)
MEASURED
is the
are enabled, the measurement value is that of the first pin to
MEASURED
start driving.
t
MEASURED
t
DIS
V
(MEASURED) – 0.5V
OH
V
(MEASURED) +0.5V
OL
t
DECAY
OUTPUT STOPS
DRIVING
HIGH-IMPEDANCE STATE.
TEST CONDITIONS CAUSE
THIS VOLTAGE LEVEL TO BE
APPROXIMATELY 1.5V.
Figure 15. Output Enable/Disable
I
OL
TO
OUTPUT
PIN
50pF
I
OH
–20–
, is dependent on the capacitative load,
DECAY
, on the output pin. It can be
L
C
0.5 V
L
t
DECAY
i
L
t
= t
– t
DIS
MEASURED
DECAY
) is the interval from
E NA
t
ENA
V
(MEASURED)
OH
2.0V
1.0V
V
(MEASURED)
OL
OUTPUT STARTS
DRIVING
+1.5V
REV. B