A1425 Allegro MicroSystems, A1425 Datasheet - Page 3

• Manufacturer Part Number: A1425
• Description: High Accuracy Analog Speed Sensor with Integrated Filter Capacitor and Dual Zero-Crossing Output Signal
• Manufacturer: Allegro MicroSystems

1
2
3
4
5
Data section.
6
7
A1425-DS Rev. 0b
OPERATING CHARACTERISTICS
operating range, unless otherwise noted. Typical operating parameters: V
ELECTRICAL CHARACTERISTICS
Supply Voltage
Supply Current
Output Saturation Voltage
Output Leakage Current
PROTECTION COMPONENT CHARACTERISTICS
Reverse Supply Current
Supply Zener Current
Supply Zener Clamp Voltage
Output Zener Current
Output Zener Clamp Voltage
Output Short Circuit Current Limit
RESPONSE CHARACTERISTICS
Power-On Time
Settling Time
Response Time
Upper Corner Frequency
Lower Corner Frequency
OUTPUT CHARACTERISTICS
Output Rise Time
Output Fall Time
MAGNETIC CHARACTERISTICS
Output Off Switchpoint
Output On Switchpoint
Applied Magnetic Field
Time required to initialize device.
Time required for the output switchpoints to be within specifi cation.
Output Rise Time will be dominated by the RC time constant.
For other sinusoidal signal frequencies and magnetic fi elds, –B
Equivalent to I
See Defi nitions of Terms section.
Exceeding the maximum magnetic fi eld may result in compromised absolute accuracy.
Preliminary - Subject to Change
Without Notice November 10, 2004
High Accuracy Analog Speed Sensor with Integrated Filter Capacitor and Dual Zero-Crossing Output Signal
Characteristic
3,6
CC(max)
2,6
6
4
+ 3 mA.
5,6
5,6
6,7
V
Symbol
Valid at T
I
OUT(SAT)
V
OUT(lim)
I
V
I
V
I
I
ZOUT
B
B
B
I
RCC
ZOUT
t
OFF
ZCC
f
CC
ZCC
PO
t
f
t
CC
cu
t
t
OP
RP
diff
S
R
cl
r
f
A
Operating; T
I
V
V
V
I
V
I
V
f
Equal to t
–3 dB, single pole
–3 dB, single pole
R
R
B
digital output signal switches low to high
B
digital output signal switches high to low
Differential p-p magnetic fi eld
SINK
CC
OUT
Bdiff
= – 40
OUT
CC
CC
OUT
CC
diff
diff
PU
PU
= 10 mA
increasing, f
decreasing, f
= –18 V
= 28 V
> V
≥ 100 Hz
= 1 kΩ, C = 10 pF
= 1 kΩ, I
= 3 mA, T
= 20 mA
= 24 V, B
= 28 V
º
OP
C to 150
CC(min)
PO
= B
A1425
1
J
+ t
RP
, T
SINK
< T
A
diff
S
= sinα(B
Test Conditions
A
º
= 25°C
; f
C, T
Bdiff
J(max)
= 25°C
Bdiff
= 0
= 20 mA, C = 10 pF
Bdiff
= 200 Hz, B
J
= 200 Hz, B
≤ 165°C; over operational air gap range and V
≥ 100 Hz
CC
diff
⁄ 2) ± 25%, where α is the phase shift shown in the Characteristic
= 12 V and T
diff
diff
= 50 Gp-p;
= 50 Gp-p;
A
= 25°C.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
Min.
–11
–11
4.0
4.5
28
28
30
50
–
–
–
–
–
–
–
–
0
–
–
–
Typ.
140
4.2
4.5
33
–
–
–
–
–
–
–
–
–
–
–
–
–
0
0
–
Max.
1250
CC
26.5
400
200
200
7.0
–1
10
37
50
50
59
20
11
11
5
3
–
9
–
within
Units
kHz
mA
mV
mA
mA
mA
mA
ms
ms
ms
µA
Hz
ns
ns
G
G
G
V
V
V
3