ADSP-21366BBCZ-1AA(RevA) View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
ADSP-21366BBCZ-1AA Datasheet PDF : 52 Pages
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ADSP-21362/ADSP-21363/ADSP-21364/ADSP-21365/ADSP-21366
OUTPUT DRIVE CURRENTS
Figure 37 shows typical I-V characteristics for the output driv-
ers of the ADSP-2136x. The curves represent the current drive
capability of the output drivers as a function of output voltage.
40
30
VOH
3.3V, +25°C
20
3.47V, -45°C
10
3.11V, +125°C
0
-10
-20
-30
-40
0
VOL
0.5
3.11V, +125°C
3.3V, +25°C
3.47V, -45°C
1.0
1.5
2.0
2.5
3.0
3.5
SWEEP (VDDEXT) VOLTAGE (V)
Figure 37. ADSP-2136x Typical Drive
TEST CONDITIONS
The ac signal specifications (timing parameters) appear in
Table 14 on Page 21 through Table 40 on Page 45. These include
output disable time, output enable time, and capacitive loading.
The timing specifications for the SHARC apply for the voltage
reference levels in Figure 38.
Timing is measured on signals when they cross the 1.5 V level as
described in Figure 39. All delays (in nanoseconds) are mea-
sured between the point that the first signal reaches 1.5 V and
the point that the second signal reaches 1.5 V.
TO
OUTPUT
PIN
50â€
30pF
1.5V
Figure 38. Equivalent Device Loading for AC Measurements
(Includes All Fixtures)
INPUT
OR 1.5V
OUTPUT
1.5V
CAPACITIVE LOADING
Output delays and holds are based on standard capacitive loads:
30 pF on all pins (see Figure 38). Figure 42 shows graphically
how output delays and holds vary with load capacitance. The
graphs of Figure 40, Figure 41, and Figure 42 may not be linear
outside the ranges shown for Typical Output Delay vs. Load
Capacitance and Typical Output Rise Time (20% to 80%,
V = Min) vs. Load Capacitance.
12
10
y = 0.0467x + 1.6323
RISE
FALL
8
6
4
y = 0.045x + 1.524
2
0
0
50
100
150
200
250
LOAD CAPACITANCE (pF)
Figure 40. Typical Output Rise/Fall Time
(20% to 80%, VDDEXT = Max)
12
RISE
10
y = 0.049x + 1.5105
FALL
8
6
y = 0.0482x + 1.4604
4
2
0
0
50
100
150
200
250
LOAD CAPACITANCE (pF)
Figure 41. Typical Output Rise/Fall Time
(20% to 80%, VDDEXT = Min)
Figure 39. Voltage Reference Levels for AC Measurements
Rev. A | Page 46 of 52 | December 2006
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