mx887d Clare, Inc., mx887d Datasheet - Page 2

• Manufacturer Part Number: mx887d
• Description: ?power Hall-effect Switch
• Manufacturer: Clare, Inc.

MX887D
Circuit Description
The MX887D µPower Hall-Effect Switch consists of a Hall element, small signal amplifier, latch, and n-
channel open drain MOSFET driver. Offset cancellation rejects errors in signal stages and the influence
of mechanical stress on the Hall element. This technique together with a precision threshold generator
and comparator produce highly accurate magnetic switch points. The Hall element is activated for a small
fraction of an operating cycle, then latched in that sample state for the remainder of the period. By using
this technique, very low power consumption is achieved.
Electrical Characteristics
Over operating voltage and temperature range unless otherwise noted.
Notes: 1. Operating and release points will vary with supply voltage.
Magnetic Characteristics
Over operating voltage and temperature range unless otherwise noted.
Notes: 1. As use here, negative flux densities are defined as less than zero (algebraic convention) and -50G is less than +10G.
MX887D
Drawing No. 088710
Pin Description
Pin No. Pin Name
Parameter
Supply Voltage
Output Leakage Current
Output On Voltage
Awake Time
Period
Duty Cycle
Supply Current
ESD
Parameter
Operating Points
Release Points
Hysteresis
1
2
3
2. B
3. Typical Data is at T
2. B
3. Typical Data is at T
OPX
OPX
V
OUT
GROUND
SUPPLY
= operating point (output turns ON); B
= operating point (output turns ON); B
B
B
B
B
B
Symbol
OPS
OPN
RPS
RPN
HYS
A
A
Description
2.5 to 5.5 Volt
Open Drain N-Channel FET
Ground
= 25°C and V
= 25°C and V
V
I
Awake (enabled)
Asleep (disabled)
Average (Calculated)
Human Body Model
South pole to branded side
North pole to branded side
South pole to branded side
North pole to branded side
| B
OUT
OUT
OPX
SUPPLY
SUPPLY
= 1mA, V
= 5.5V, B
– B
RPX
= 3.0V.
= 3.0V.
RPX
RPX
DD
|
= release point (output turns OFF).
= release point (output turns OFF).
Condition
RPN
Condition
= 3.0V
2
< B < B
RPS
Min
Min
-60
2.5
6
2
<1.0
Typ
Typ
100
0.1
5
5
IXYS
www.claremicronix.com
Max
Max
300
5.5
1.0
2.0
8.0
90
90
15
60
-6
Unit
Unit
7/19/07
mV
mS
mA
µA
µS
µA
µA
kV
%
G
G
G
G
G
V