MAX9621AUB+T Maxim Integrated Products, MAX9621AUB+T Datasheet

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MAX9621AUB+T

Manufacturer Part Number
MAX9621AUB+T
Description
IC HALL EFFECT SENSOR 10UMAX
Manufacturer
Maxim Integrated Products
Type
Hall Effect Sensorr
Datasheet

Specifications of MAX9621AUB+T

Input Type
Logic
Output Type
Analog, Digital
Interface
2-Wire
Current - Supply
1mA
Mounting Type
Surface Mount
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Operating Supply Voltage
5.5 V to 18 V
Supply Current
1 mA
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
µMAX is a registered trademark of Maxim Integrated Products, Inc.
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.
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
to +125NC temperature range.
19-5024; Rev 0; 11/09
Typical Application Circuit appears at end of data sheet.
Dual, 2-Wire Hall-Effect Sensor Interface with
Window Lifters
Seat Movers
Electric Sunroofs
Seatbelt Buckles
Door Power Locks
Ignition Key
Steering Column
Speed Sensing
M
package and is rated for operation in the -40NC
_______________________________________________________________ Maxim Integrated Products 1
General Description
Applications
Analog and Digital Outputs
S
S
S
S
S
S
S
S
S
S
S
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
ISET
IN2
MAX9621AUB+T
IN1
Provides Supply Current and Interfaces to Two
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
PART
DETECTION
REFERENCE
SHORT
INPUT
REF
-40NC to +125NC
TEMP RANGE
Ordering Information
Functional Diagram
BAT
BAT
REF
REF
GND
BAT
SLEEP-MODE
CONTROL
FILTER
FILTER
MAX9621
PIN-PACKAGE
Features
10 FMAX
10kI
SLEEP
AOUT1
DOUT1
AOUT2
DOUT2

Related parts for MAX9621AUB+T

MAX9621AUB+T Summary of contents

Page 1

... Operates with ±3V Ground Shift Between the Hall S Sensor and the MAX9621 ±2kV Human Body Model ESD and ±200V Machine S Model ESD at All Pins 3mm x 5mm, 10-Pin µMAX Package S PART MAX9621AUB+T Applications +Denotes a lead(Pb)-free/RoHS-compliant package Tape and reel. ISET REFERENCE IN1 INPUT SHORT ...

Page 2

Dual, 2-Wire Hall-Effect Sensor Interface with Analog and Digital Outputs ABSOLUTE MAXIMUM RATINGS BAT to GND ...........................................................-0.3V to +60V ISET to BAT ..........................................................-2.0V to +0.3V IN1, IN2 to GND ................ -3V to lower of +60V or (V AOUT1, DOUT1, AOUT2, ...

Page 3

Dual, 2-Wire Hall-Effect Sensor Interface with DC ELECTRICAL CHARACTERISTICS (continued 13.6V 5V, IN1 = IN2 = no connection, R BAT SLEEP GND at AOUT1 and AOUT2, unless otherwise noted, T PARAMETER SYMBOL Input Referred Current Offset ...

Page 4

Dual, 2-Wire Hall-Effect Sensor Interface with Analog and Digital Outputs 14mA IN1 7mA 0mA 0.7mA AOUT1 0.35mA 0mA 5V DOUT1 0V Figure 1. Timing Diagram 14mA IN_ 7mA 0mA 5V DOUT_ 0V Figure 2. Hall Input Pulse Rejection 4 APPROXIMATELY ...

Page 5

Dual, 2-Wire Hall-Effect Sensor Interface with (V = 13.6V 61.9kI 5kI to GND at AOUT_, V BAT SET L BAT SUPPLY CURRENT vs OPERATING MODE BAT 0 -40NC A 0.8 0.7 0.6 ...

Page 6

Dual, 2-Wire Hall-Effect Sensor Interface with Analog and Digital Outputs (V = 13.6V 61.9kI 5kI to GND at AOUT_, V BAT SET L HALL INPUT CURRENT THRESHOLDS vs. ISET RESISTOR LOW TO HIGH ...

Page 7

Dual, 2-Wire Hall-Effect Sensor Interface with (V = 13.6V 61.9kI 5kI to GND at AOUT_, V BAT SET L CURRENT GAIN vs. SUPPLY VOLTAGE 0.07 0.06 0.05 0.04 0.03 5.50 SUPPLY VOLTAGE (V) RESPONSE TO SHORT ...

Page 8

Dual, 2-Wire Hall-Effect Sensor Interface with Analog and Digital Outputs PIN NAME Battery Power Supply. Connect to the positive supply through an external reverse-polarity diode. 1 BAT Bypassed to GND with a 0.1FF capacitor. Current Setting Input. Place a 1% ...

Page 9

Dual, 2-Wire Hall-Effect Sensor Interface with PIN NAME Open-Drain Output. Signal translated from Hall sensor 2. DOUT2 is high when the current flowing out of 6 DOUT2 IN2 exceeds the input current threshold high, and is low when less than ...

Page 10

Dual, 2-Wire Hall-Effect Sensor Interface with Analog and Digital Outputs Table 1. AOUT_/DOUT_ Truth Table CONDITION IN_ Short to GND IN_ Short to BAT or IN_ Open SLEEP Low V > 18V BAT *If IN_ is already shorted to BAT ...

Page 11

Dual, 2-Wire Hall-Effect Sensor Interface with V BAT 14V V IN_ 0V 11.5mA I IN_ 0A Figure 4. Hall Input Reenergized When Open Input Is Reconnected to Hall Sensor Sleep Mode Input (SLEEP) The MAX9621 features an active-low SLEEP input. ...

Page 12

Dual, 2-Wire Hall-Effect Sensor Interface with Analog and Digital Outputs Figure 5. 3-Wire Hall-Effect Switches Configured as 2-Wire Table 2. A Partial List of Compatible Hall Switches PART NO. HAL573-6 HAL556/560/566 HAL579/581/584 A1140/1/2/3 A3161 TLE4941/C Sleep mode can be used ...

Page 13

Dual, 2-Wire Hall-Effect Sensor Interface with BATTERY: 5.5V TO 18V OPERATING, 60V WITHSTAND R SET ISET IN1 N 0.01 µ INPUT REMOTE SHORT GROUND DETECTION IN2 N 0.01 µ REMOTE GROUND Analog and Digital Outputs Typical ...

Page 14

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 14 © ...

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