|
|
PDF OCH177 Data sheet ( Hoja de datos )
| Número de pieza | OCH177 | |
| Descripción | Micro Power Omnipolar Hall-effect Sensor Switch | |
| Fabricantes | Orient Chip | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de OCH177 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
|
No Preview Available !
OCH177
Micro Power Omnipolar Hall-effect Sensor Switch
General Description
The OCH177 Omnipolar Hall-effect Sensor IC is
fabricated from mixed signal CMOS technology. It is
comprised of two Hall plates and a CMOS output
driver, mainly designed for battery-operation,
hand-held equipment (such as Cellular and Cordless
Phone, PDA). The total power consumption in normal
operation is typically 24μW with a 3V power source.
Either north or south poles of sufficient strength will
turn the output on. The output will be turned off under
no magnetic field. While the magnetic flux density (B)
is larger than operating point (BOP), the output will be
turned on (low), the output is held until B is lower than
release point (BRP), and then turned off.
The OCH177 is available in many flexible
packaging options, such as DFN1216-4L. Operating
temperature range of the OCH177 is from -40°C to
85°C.
To minimize the BOM cost, capacitors of the
MLCC type are supported, and only one external
component are needed to complete the application
circuit.
Features
z Micro power consumption ideal for
battery-powered applications
z Omnipolar (operation with magnetic field of either
north or south pole), easy to use as output
switches with both North and South pole
z Input Voltage Range: 2.4V to 5.5V
z Very High Sensitivity Hall Sensor
z Chopper stabilized amplifier stage
z Good RF noise immunity
z DFN1216-4L package
z ESD (HBM) ＞ 4KV
z Not need the push-high resistance
Applications
z Cover switch in clam-shell cellular phones
z Cover switch in Notebook PC/PDA
z Contact-less switch in consumer products
z Solid State Switch
z Handheld Wireless Handset Awake Switch
z Lid close sensor for battery-powered devise
z Magnet proximity sensor for reed switch
replacement in low duty cycle applications
Pin Configuration
(1) DFN1216_4L (Top View)
Pin No.
Pin Name OCH177 OCH177A
Pin Function
VDD
4
1 Power Supply Input
GND
2
2 Ground
OUTPUT
1
4 Output Pin
N.C 3
3 Not Connected
Note: NC is “No Connection” which is recommended to be tied to ground.
Page1 - 8
Ver. 1.1 June. 08.2012
1 page  
Positive Edge
OCH177
Micro Power Omnipolar Hall-effect Sensor Switch
Negative Edge
Functional Description
Low Average Power
Internal timing circuitry activates the
sensor for 75μs and deactivates it for the
remainder of the period (125ms). A short
"awake" time allows for stabilization prior to
the sensor sampling and data latching on
the falling edge of the timing pulse. The
output during the "sleep" time is latched in
the last sampled state. The supply current
is not affected by the output state.
IDD(EN)
IDD(DIS)
0
PERIOD
AWAKE
SLEEP
SAMPLE &
OUTPUT LATCHED
Chopper-Stabilized Technique
The Hall element can be considered as a resistor array similar to a Wheatstone bridge. A large portion of the
offset is a result of the mismatching of these resistors. These devices use a proprietary dynamic offset cancellation
technique, with an internal high-frequency clock to reduce the residual offset voltage of the Hall element that is
normally caused by device over-molding, temperature dependencies, and thermal stress. The chopper-stabilizing
technique cancels the mismatching of the resistor
circuit by changing the direction of the current
flowing through the Hall plate using CMOS
switches and Hall voltage measurement taps, while
maintains the Hall voltage signal that is induced by
the external magnetic flux. The signal is then
captured by a sample-and-hold circuit and further
processed using low-offset bipolar circuitry. This
technique produces devices that have an extremely
stable quiescent Hall output voltage, are immune to
thermal stress, and have precise recoverability
after temperature cycling. A relatively high
sampling frequency is used for faster signal
processing capability can be processed.
Page5 - 8
Ver. 1.1 June. 08.2012
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet OCH177.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| OCH177 | Micro Power Omnipolar Hall-effect Sensor Switch | Orient Chip |
| OCH177A | Micro Power Omnipolar Hall-effect Sensor Switch | Orient Chip |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |