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PDF A1172 Data sheet ( Hoja de datos )
| Número de pieza | A1172 | |
| Descripción | Micropower Ultra-Sensitive Hall-Ef fect Switch | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de A1172 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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A1172
Micropower Ultra-Sensitive Hall-Effect Switch
www.daF▪taesMhaetiecutr4orupe.cosowmaernodpeBrateionnefits
▪ Operation with either north or south pole—
no magnetic orientation required during assembly
▪ 1.65 to 3.5 V battery operation
▪ Chopper stabilization
▫ Superior temperature stability
▫ Extremely low switchpoint drift
▫ Insensitive to physical stress
▪ Solid state reliability
▪ Small size: WLCSP (≈ 1 mm × 1 mm × 0.5 mm)
▪ Complementary, push-pull outputs eliminate need for
pull-up resistor
Package: 4 pin WLCSP (suffix CG)
Description
The A1172 is an ultra-sensitive, pole-independent Hall-effect
switch with a latched digital output. It features operation at
low supply currents and voltages, making it ideal for battery-
operated electronics. The 1.65 to 3.5 V operating supply
voltage and unique clocking algorithm reduce the average
operating power requirements to less than 15 μW with a
2.75 V supply.
The A1172 has two push-pull output structures. Omnipolar
activation for the output function is available on each output
structure. As such, either a north or south pole of sufficient
strength turns the available outputs off or on. The A1172
contains two complementary outputs. Therefore, for a fixed
magnetic field, one output will be in a high voltage state and
one output will be in a low voltage state.
Improved stability is made possible through dynamic offset
cancellation using chopper stabilization, which reduces the
residual offset voltage normally caused by device overmolding,
temperature dependencies, and thermal stress. This device
Not to scale
VDD
Continued on the next page…
Engineering samples available on a limited basis. Contact your local
sales or applications support office for additional information.
Functional Block Diagram
1172-DS
Clock / Logic
Amp
Low-Pass
Filter
GND
Latch
Latch
VOUTPS
VOUTPN
1 page  
A1172
Micropower Ultra-Sensitive Hall-Effect Switch
www.datasheet4u.com
12
10
8
6
4
2
0
-60
Average Supply Current versus Temperature
VDD = 1.65V
VDD = 2.75V
VDD = 3.5V
-40 -20 0 20 40 60 80 100
TA (°C)
Average Supply Current versus Supply Voltage
12
85°C
10 -40°C
25°C
8
6
4
2
0
1 1.5 2 2.5 3 3.5 4
VCC (V)
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet A1172.PDF ] | |
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