Cosemi
t
ech
CHA44X/CH44X
Automotive Product Group
This is advanced information on a new product now
in development or undergoing evaluation. Details are
subject to change without notice and Cosemitech
assumes no obligation for future manufacture of this
product. Contact Cosemitech for the latest status.
Preliminary Datasheet 2.0
Page
1
/
15
FEATURES and FUNCTIONAL DIAGRAM
PACKAGE
ï‚· AEC-Q100 automotive qualified for CHA44X
ï‚· Digital Bipolar-Latch Hall Sensor
ï‚· Multiple Sensitivity Options (BOP / BRP):
+15 / -15 Gauss; +30 / -30 Gauss; +45 / -45 Gauss; +120 / -
120 Gauss;
ï‚· Chopper stabilization for stable operate points throughout
operating temperature range
ï‚· On board voltage regulator for 2.5V to 22V range
ï‚· Resistant to physical stress
ï‚· Output short-circuit protection
ï‚· Operation from unregulated supply
ï‚· Reverse-battery and freewheeling protection
ï‚· Solid-state reliability
ï‚· Wide Operating temperature range: -40 to 150
o
C
ï‚· Small package sizes TO-92S, SOT-23 and SOT-89
ï‚· RoHS-compliant material meets directive 2011/65/EU
TO-92S
SOT-23-3L SOT-89-3L
APPLICATIONS
- Speed and RPM sensing
- Tachometer, counter pickup
- Flow-rate sensing
- Brushless dc (direct
current) motor commutation
- Motor and fan control
- Robotics control
DESCRIPTION
The CHA44X/CH44X Hall-effect sensor is extremely temperature-stable and stress-
resistant sensor ICs,
especially suited for operation over extended temperature ranges from -40°C to 150°C. Superior high
temperature performance is possible through dynamic offset cancellation, which reduces th
e residual offset
voltage normally caused by device over-molding, temperature dependencies, and thermal stress.
The device includes a voltage regulator, Hall-voltage generator, small-signal amplifier, chopper
stabilization, Schmitt trigger, and a short circuit protected open-drain output to sink up to 25 mA.
An on-board regulator permits operation with supply voltages of 2.5 to 22
V. The advantage of operating
down to 2.5V is that the device can used in 2.5V applications or with additional external resistance in
series with the supply pin for greater protection against high-voltage transient events.
The CHA44X/CH44X series is latch Hall switch. For the latch mode, there are also invert polarity
devices. Normally a south pole of sufficient strength turns on the output; However, for invert polarity
devices, a north pole of sufficient strength turns on the output.
The CHA44X/CH44X also integrated internal clamps against supply/output transients; output short
circuits protection; reverse battery conditions.
Three package styles provide a magnetically optimized package for most applications, SOT-23, TO-92S
and SOT-89. Each package type is lead (Pb) free (suffix, –T), with a 100% matte-tin-plated lead-frame.
Cosemi
t
ech
CHA44X/CH44X
Automotive Product Group
. This is advanced information on a new product now
in development or undergoing evaluation. Details are
subject to change without notice and Cosemitech
assumes no obligation for future manufacture of this
product. Contact Cosemitech for the latest status.
Preliminary Datasheet 2.0
Page 2/
15
Table of Contents
1. Product Family Members .............................................................................................................. 3
2. Pin Definitions and Descriptions .................................................................................................. 3
3. Absolute Maximum Ratings .......................................................................................................... 3
4. ESD Protections ............................................................................................................................ 5
5. Function Description .................................................................................................................... 5
6. Definition of Switching Function .................................................................................................. 5
7. Temperature Characterization ..................................................................................................... 5
8. Parameters Specification .............................................................................................................. 6
9. Application infromation ................................................................................................................. 7
10.Test Condition .............................................................................................................................. 7
11. Package Information ................................................................................................................... 8