a8291 Allegro MicroSystems, Inc., a8291 Datasheet - Page 5

• Manufacturer Part Number: a8291
• Description: A8291 Single Lnb Supply And Control Voltage Regulator
• Manufacturer: Allegro MicroSystems, Inc.

A8291
ELECTRICAL CHARACTERISTICS (continued)
Continued on the next page…
Cable Disconnect Current Source
Bypass FET
Bypass FET Control (BFC) Logic Input
Input Leakage
Bypass FET On Resistance
Turn On/Off Delay
Tone
Tone Frequency
Tone Amplitude, Peak-to-Peak
Tone Duty Cycle
Tone Rise Time
Tone Fall Time
EXTM Logic Input
EXTM Input Leakage
Tone Detector
Tone Detect Input Amplitude Receive, Peak-to-Peak
Tone Detect Input Amplitude Transmit, Peak-
to-Peak
Tone Reject Input Amplitude, Peak-to-Peak
Frequency Capture
Input Impedance
TDO Output Voltage
TDO Output Leakage
I
Logic Input (SDA,SCL) Low Level
Logic Input (SDA,SCL) High Level
Logic Input Hysteresis
Logic Input Current
Logic Output Voltage SDA and IRQ
Logic Output Leakage SDA and IRQ
SCL Clock Frequency
Output Fall Time
Bus Free Time Between Stop/Start
Hold Time Start Condition
Setup Time for Start Condition
2
C™-Compatible Interface
2
2
Characteristics
Single LNB Supply and Control Voltage Regulator
V
V
t
V
V
V
I
V
D(ON/OFF)
DC
V
V
Symbol
I
I
V
V
I
EXTMLKG
TDT(pp)Ext
V
V
R
V
V
V
CADSRC
TDT(pp)Int
t
t
TONE(pp)
TDOLKG
t
BFCLKG
t
t2COut(L)
t
EXTM(H)
f
EXTM(L)
fI2COut
HD:STA
SU:STA
TDR(pp)
I2CIHYS
rTONE
fTONE
t2CLKG
BFC(H)
TRI(pp)
TDO(L)
SCL(H)
BFC(L)
TONE
Z
SCL(L)
f
t
DS(on)
I
f
BUF
I2CI
CLK
TDI
TONE
TDI
at T
A
V
I
BFC2 bit = 1
V
I
I
I
I
f
f
(options 1 and 2, in figure 1)
f
tone (options 3 and 4, in figure 1)
f
600 mVpp sine wave
Tone present, I
Tone absent, V
V
I
V
V
LOAD
LOAD
LOAD
LOAD
LOAD
TONE
TONE
TONE
TONE
LOAD
= 25°C, V
LNB
BFC
I2CI
t2COut
t2COut(H)
= 0 to 7 V
= 21.00 V, V
= Low, or BFC2 bit = 1
= 450 mA, and V
= 0 to 450 mA, C
= 0 to 450 mA, C
= 0 to 450 mA, C
= 0 to 450 mA, C
= 22 kHz sine wave, TMODE = 0
= 22 kHz sine wave, using internal tone
= 22 kHz sine wave, using external
= 22 kHz sine wave
= 3 mA
= 0 to 7 V
to V
IN
= 8 to 16 V, unless noted otherwise
t2COut(L)
LOAD
TDO
Test Conditions
BOOST
= 7 V
= 3 mA
BFC
LOAD
LOAD
LOAD
LOAD
= 22.8 V
= Low, or
= 750 nF
= 750 nF
= 750 nF
= 750 nF
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
17.6
Min.
400
300
400
300
–10
1.0
2.0
2.0
2.0
1.3
0.6
0.6
–1
20
40
–1
1
–
–
–
5
5
–
–
–
–
–
–
–
–
–
–
–
<±1.0
Typ.
1.75
650
620
150
0.5
8.6
22
50
10
10
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Max.
26.4
800
100
400
250
2.5
0.8
0.8
0.4
0.8
0.4
24
60
15
15
10
10
10
–
1
1
–
–
1
–
–
–
–
–
–
–
–
–
Units
kHz
kHz
kHz
mA
mV
mV
mV
mV
mV
mV
kΩ
μA
μs
μs
μs
μA
μA
μA
μA
μs
μs
μs
ns
Ω
%
V
V
V
V
V
V
V
V
5