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MAX9621_11

产品描述Dual, 2-Wire Hall-Effect Sensor Interface with Analog and Digital Outputs
文件大小2MB,共15页
制造商Maxim(美信半导体)
官网地址https://www.maximintegrated.com/en.html
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MAX9621_11概述

Dual, 2-Wire Hall-Effect Sensor Interface with Analog and Digital Outputs

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19-5024; Rev 1; 9/11
TION KIT
EVALUA BLE
AVAILA
Dual, 2-Wire Hall-Effect Sensor Interface with
Analog and Digital Outputs
General Description
The MAX9621 is a continuation of the Maxim family of
Hall-effect sensor interfaces that already includes the
MAX9921. The MAX9621 provides a single-chip solution
to interface two 2-wire Hall-effect sensors to low-voltage
microprocessors (FP) through either a digital output for
Hall-effect switches or an analog output for linear infor-
mation or both.
The MAX9621 protects the Hall sensors from supply
transients up to 60V at the BAT supply. Normal operating
supply voltage ranges from 5.5V to 18V. If the BAT sup-
ply rises above 18V, the MAX9621 shuts off the current to
the Hall sensors. When a short-to-ground fault condition
is detected, the current to the Hall input is shut off and
the condition is indicated at the analog output by a zero-
current level and a high digital output.
The MAX9621 provides a minimum of 50Fs blanking
time following Hall sensor power-up or restart. The open-
drain digital outputs are compatible with logic levels up
to 5.5V.
The MAX9621 is available in a 3mm x 5mm, 10-pin
FMAX
M
package and is rated for operation in the -40NC
to +125NC temperature range.
S
S
S
S
S
S
S
S
S
S
Features
S
Provides Supply Current and Interfaces to Two
MAX9621
2-Wire Hall-Effect Sensors
5.5V to 18V Operating Voltage Range
Protects Hall Sensors Against Up to 60V Supply
Transients
Low-Power Shutdown for Power Saving
Filtered Digital Outputs
Analog Output Mirrors the Hall Sensor Current
Hall Inputs Protected from Short to Ground
Hall Sensor Blanking Following Power-Up and
Restart from Shutdown and Short to Ground
Operates with ±3V Ground Shift Between the Hall
Sensor and the MAX9621
±2kV Human Body Model ESD and ±200V Machine
Model ESD at All Pins
3mm x 5mm, 10-Pin µMAX Package
Ordering Information
PART
MAX9621AUB+T
TEMP RANGE
-40NC to +125NC
PIN-PACKAGE
10
FMAX
Applications
Window Lifters
Seat Movers
Electric Sunroofs
Seatbelt Buckles
Door Power Locks
Ignition Key
Steering Column
Speed Sensing
MAX9621AUB/V+
-40NC to +125NC
10
FMAX
+Denotes
a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
/V denotes an automotive qualified part.
Functional Diagram
BAT
REF
BAT
SLEEP-MODE
CONTROL
10kI
SLEEP
ISET
REFERENCE
AOUT1
DOUT1
IN1
REF
FILTER
BAT
INPUT
SHORT
DETECTION
MAX9621
AOUT2
DOUT2
Typical Application Circuit appears at end of data sheet.
IN2
REF
FILTER
µMAX is a registered trademark of Maxim Integrated Products, Inc.
GND
_______________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

 
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