adsp-21367kbpz-2a Analog Devices, Inc., adsp-21367kbpz-2a Datasheet - Page 47

• Manufacturer Part Number: adsp-21367kbpz-2a
• Description: Sharc Processors
• Manufacturer: Analog Devices, Inc.

OUTPUT DRIVE CURRENTS
Figure 37
ers of the ADSP-21367/ADSP-21368/ADSP-21369. The curves
represent the current drive capability of the output drivers as a
function of output voltage.
TEST CONDITIONS
The ac signal specifications (timing parameters) appear in
Table 15 on Page 23
output disable time, output enable time, and capacitive loading.
The timing specifications for the SHARC apply for the voltage
reference levels in
Timing is measured on signals when they cross the 1.5 V level as
described in
sured between the point that the first signal reaches 1.5 V and
the point that the second signal reaches 1.5 V.
1.5V
- 20
- 30
- 40
Figure 38. Equivalent Device Loading for AC Measurements
- 10
40
30
20
10
0
+
0
shows typical I-V characteristics for the output driv-
Figure 37. Typical Drive at Junction temperature
Figure
V
OL
0.5
Figure
39. All delays (in nanoseconds) are mea-
through
3.47V, - 45°C
SWEEP (V
1.0
(Includes All Fixtures)
39.
I
I
OL
OH
3.11V, 125°C
Table 43 on Page
1.5
DDEXT
) VOLTAGE (V)
2.0
V
OH
3.11V, 125°C
2.5
3.3V, 25°C
30pF
46. These include
50
3.0
Rev. A | Page 47 of 56 | August 2006
3.3V, 25°C
3.47V, -45°C
3.5
OUTPUT
PIN
TO
ADSP-21367/ADSP-21368/ADSP-21369
CAPACITIVE LOADING
Output delays and holds are based on standard capacitive loads:
30 pF on all pins (see
how output delays and holds vary with load capacitance. The
graphs of
outside the ranges shown for Typical Output Delay vs. Load
Capacitance and Typical Output Rise Time (20% to 80%,
V = Min) vs. Load Capacitance.
OUTPUT
Figure 39. Voltage Reference Levels for AC Measurements
12
10
0
8
6
4
2
INPUT
12
10
Figure 40. Typical Output Rise/Fall Time (20% to 80%,
Figure 41. Typical Output Rise/Fall Time (20% to 80%,
Figure
OR
8
6
4
2
0
0
0
1.5V
40,
y = 0.0467x + 1.6323
50
y = 0.049x + 1.5105
Figure
50
Figure
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
V
V
41, and
DDEXT
DDEXT
100
38).
100
y = 0.0482x + 1.4604
= Max)
y = 0.045x + 1.524
= Min)
Figure 42
Figure 42
RISE
150
150
RISE
shows graphically
FALL
FALL
may not be linear
200
200
1.5V
250
250