参数资料
型号: ADSP-21365YSWZ-2BA
厂商: ANALOG DEVICES INC
元件分类: 数字信号处理
英文描述: 16-BIT, 55.55 MHz, OTHER DSP, PQFP144
封装: MS-026BFB-HD, LQFP-144
文件页数: 40/56页
文件大小: 2748K
代理商: ADSP-21365YSWZ-2BA
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ADSP-21362/ADSP-21363/ADSP-21364/ADSP-21365/ADSP-21366
The ac signal specifications (timing parameters) appear in
output disable time, output enable time, and capacitive loading.
The timing specifications for the SHARC apply for the voltage
reference levels in Figure 38.
Figure 37 shows typical I-V characteristics for the output driv-
Output delays and holds are based on standard capacitive loads:
ers of the ADSP-2136x. The curves represent the current drive
30 pF on all pins (see Figure 38). Figure 42 shows graphically
capability of the output drivers as a function of output voltage.
how output delays and holds vary with load capacitance. The
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V
N
T
m
A
D
E
X
T
OUTPUT DRIVE CURRENTS
CAPACITIVE LOADING
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.
3.47V, -45°C
12
3.3V, +25°C
R
S
E
A
N
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I
D
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)
40
VOH
3.3V, +25°C
3.11V, +125°C
VOL
3.47V, -45°C
30
20
y = 0.0467x + 1.6323
RIS
FALL
E
y = 0.045x + 1.524
10
0
-
10
8
-
20
6
-
30
-
40
4
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
SWEEP (VDDEXT)VOLTAGE (V)
2
Figure 37. ADSP-2136x Typical Drive
TEST CONDITIONS
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.
0
50
100
150
200
250
LOAD CAPACITANCE (pF)
Figure 40. Typical Output Rise/Fall Time
(20% to 80%, VDDEXT = Max)
12
RISE
y = 0.049x + 1.5105
FALL
y= 0.0482x + 1.4604
10
8
50
TO
6
1.5V
OUTPUT
PIN
4
30pF
2
0
June 2007
Figure 38. Equivalent Device Loading for AC Measurements
0
50
100
150
200
250
(Includes All Fixtures)
LOAD CAPACITANCE (pF)
Figure 41. Typical Output Rise/Fall Time
OR
1.5V
OUTPUT
INPUT
(20% to 80%, VDDEXT = Min)
Figure 39. Voltage Reference Levels for AC Measurements
Rev. B
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Page 45 of 56
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