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參數資料
型號: ADSP-2162
廠商: Analog Devices, Inc.
元件分類: 基準電壓源/電流源
英文描述: Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
中文描述: 無電容,NMOS管,150mA的低壓差穩壓器的反向電流保護
文件頁數: 16/39頁
文件大小: 243K
代理商: ADSP-2162
REV. 0
ADSP-216x
SPECIFICATIONS
ADSP-2161/ADSP-2163/ADSP-2165
–16–
TEST CONDITIONS
Figure 12 shows voltage reference levels for ac measurements.
1.5V
0.0V
OUTPUT
3.0V
INPUT
1.5V
0.8V
2.0V
Figure 12.VoltageReferenceLevels 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 out-
put high or low voltage to a high impedance state. The output
disable time (t
DIS
) is the difference of t
MEASURED
and t
DECAY
, as
shown in Figure 13. The time t
MEASURED
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 mea-
sured output high or low voltage.
The decay time, t
DECAY
, is dependent on the capacitative load,
C
L
, and the current load, i
L
, on the output pin. It can be ap-
proximated by the following equation:
t
C
V
i
DECAY
L
L
=
×
0 5
from which
t
DIS
=
t
MEASURED
t
DECAY
is calculated. If multiple pins (such as the data bus) are disabled,
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
ENA
) is the interval from when
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 Figure 13. If multiple pins (such as the data bus) are enabled,
the measurement value is that of the first pin to start driving.
2.0V
1.0V
t
ENA
REFERENCE
SIGNAL
OUTPUT
t
DECAY
V
(MEASURED)
OUTPUT STOPS
DRIVING
OUTPUT STARTS
DRIVING
t
DIS
t
MEASURED
V
(MEASURED)
V
OH
(MEASURED) – 0.5V
V
OL
(MEASURED) +0.5V
HIGH-IMPEDANCE STATE. TEST CONDITIONS CAUSE
THIS VOLTAGE LEVEL TO BE APPROXIMATELY 1.5V.
V
(MEASURED)
V
(MEASURED)
Figure 13. Output Enable/Disable
TO
OUTPUT
PIN
50pF
+1.5V
I
OH
I
OL
Figure 14. Equivalent Device Loading for AC
Measurements (Except Output Enable/Disable)
相關PDF資料
PDF描述
ADSP-2161KS-66 DSP Microcomputers with ROM
ADSP-2163 Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
ADSP-2164 Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
ADSP-2165 Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
ADSP-2166 Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
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