3422 Datasheet, PDF (1/10 Pages) Unisonic Technologies – HIGH PERFORMANCE DUAL BIPOLAR OPERATINAL AMPLIFIER

3422
HALL-EFFECT,
DIRECTION-DETECTION SENSORS
E1
E2
X
X
LOGIC
VCC
1
2
3
4
5
Dwg PH-015
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V_CC . . . . . . . . . . . . . . 18 V
Magnetic Flux Density, B . . . . Unlimited
Output OFF Voltage, V_OUT . . . . . . . . . V_CC
Output Sink Current, I_OUT . . . . . . . 30 mA
Package Power Dissipation,
P_D . . . . . . . . . . . . . . . . . . . . . 500 mW
Operating Temperature Range, T_A
Suffix ‘E–’ . . . . . . . . . -40°C to +85°C
Suffix ‘L–’ . . . . . . . . -40°C to +150°C
Storage Temperature Range,
T_S . . . . . . . . . . . . . . -65°C to +170°C
The A3422xKA Hall-effect, direction-detection sensor is a new
generation of special-function integrated sensors that is capable of sens-
ing the direction of rotation of a ring magnet. This transducer provides
separate digital outputs that provide information on magnet rotation
speed, direction, and magnet pole count. This device eliminates the ma-
jor manufacturing hurdles encountered in fine-pitch direction-detection
applications, namely maintaining accurate mechanical location between
the two active Hall elements. Here, the two Hall elements are photo-
lithographically aligned to better than 1 μm, as contrasted with 100 μm
or worse mechanical location tolerance when manufactured discretely.
This highly sensitive, temperature-stable, magnetic transducer is ideal
for use in digital-encoder systems in the harsh environments of auto-
motive or industrial applications. The A3422xKA is a high-sensitivity
device optimized for use with high-density magnets.
The A3422xKA monolithic integrated circuit contains two inde-
pendent Hall-effect bipolar switches whose digital outputs are internally
coupled to CMOS logic circuitry that decodes signal speed and direc-
tion. Extremely low-drift BiCMOS circuitry is used for the amplifiers
to ensure symmetry between the two switches so that signal quadrature
can be maintained. An on-chip voltage regulator allows the use of this
device from a 4.5 V to 18 V supply. The outputs are standard open-col-
lector outputs.
Two operating temperature ranges are provided; suffix ‘E–’ is for
the automotive and industrial temperature range of -40°C to +85°C, suf-
fix ‘L–’ is for the automotive and military temperature range of
-40°C to +150°C. The 5-pin ‘KA’ SIP package provides a cost-com-
petitive solution to magnetic sensing in harsh environments.
FEATURES
• Internal Direction-Decoding Circuitry
• Two Matched Hall Bipolar Switches on a Single Substrate
• Superior Temperature Stability
• 4.5 V to 18 V Operation
Electrically Defined Power-On State
Undervoltage Lockout