參數(shù)資料
型號(hào): A8285
廠商: Allegro MicroSystems, Inc.
英文描述: LNB Supply and Control Voltage Regulator
中文描述: LNB電源和控制穩(wěn)壓器
文件頁(yè)數(shù): 4/17頁(yè)
文件大小: 527K
代理商: A8285
4
Worcester, Massachusetts 01615-0036 (508) 853-5000
115 Northeast Cutoff, Box 15036
www.allegromicro.com
D
P
2
A8285/A8287
LNB Supply and Control Voltage Regulator
ELECTRICAL CHARACTERISTICS
(
continued
) at T
A
= +25°C, V
IN
= 10 to 16 V (unless otherwise noted)
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Tone Characteristics
Tone Frequency
f
TONE
20
22
24
kHz
Tone Pull-Down Current
I
TONE
30
40
50
mA
Tone Turn-On and Turn-Off Delays
t
DEL
V
IH
V
IL
I
IL
V
TDI
Using EXTM pin
1
μs
External Tone Logic Input
2
V
V
μA
0.8
1
Input Leakage
–1
Tone Detector Input Amplitude
f
IN
= 22 kHz
260
1000
mV
Tone Detector Frequency Capture
f
TDI
600 mV
pp
sinewave
17.6
26.4
kHz
Tone Detector Input Impedance
Z
TDI
See note 1
8.6
k
Tone Detector Output Voltage
V
OL
Tone present, I
LOAD
= 3 mA
0.4
V
Tone Detector Output Leakage
I
OL
Tone absent, V
O
= 7 V
10
μ
A
I
2
C
Interface
Logic Input (SDA,SCL) Low Level
V
IL
0.8
V
Logic Input (SDA,SCL) High Level
V
IH
2
V
Input Hysteresis
V
HYS
150
mV
Logic Input Current
Output Voltage (SDA, IRQ)
I
IN
V
OL
V
IN
= 0 V to 7 V
I
LOAD
= 3 mA
–10
<±1.0
10
0.4
μA
V
Output Leakage (SDA, IRQ)
I
OL
V
O
= 0 V to 7 V
10
μA
SCL Clock Frequency
f
CLK
0
400
kHz
Output Fall Time
t
OF
V
IH
to V
IL
250
ns
Bus Free Time Between Stop and Start
t
BUF
See I
2
C Interface Timing Diagram
1.3
μs
Hold Time for Start Condition
t
HD:STA
See I
2
C Interface Timing Diagram
0.6
μs
Setup Time for Start Condition
t
SU:STA
See I
2
C Interface Timing Diagram
0.6
μs
SCL Low Time
t
LOW
See I
2
C Interface Timing Diagram
1.3
μs
SCL High Time
t
HIGH
See I
2
C Interface Timing Diagram
0.6
μs
Data Setup Time
t
SU:DAT
See note1; I
2
C Interface Timing Diagram
100
ns
Data Hold Time
t
HD:DAT
See I
2
C Interface Timing Diagram
0
900
ns
Setup Time for Stop Condition
t
SU:STO
See I
2
C Interface Timing Diagram
0.6
μs
Continued on next page
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