PIN

NAME

FUNCTION

1

BAT

Battery Power Supply. Connect to the positive supply through an external reverse-polarity diode. Bypassed

to GND with a 0.1µF capacitor.

2

ISET

Current Setting Input. Place a 1% resistor (RSET) between BAT and ISET to set the desired input current

threshold range for the DOUT_ outputs. See the Typical Operating Characteristics section for the correct

value of RSET for the desired range. Make no other connections to this pin. All routing must have low

parasitic capacitance. See the Input Current Thresholds and Short to Ground section.

3

IN1

Hall-Effect Sensor Input 1. Supplies current to the Hall sensor and monitors the current level drawn to

determine the high/low state of the sensor. Bypass to GND with a 0.01µF capacitor. Connect an unused

input to BAT pin.

4

IN2

Hall-Effect Sensor Input 2. Supplies current to the Hall sensor and monitors the current level drawn to

determine the high/low state of the sensor. Bypass to GND with a 0.01µF capacitor. Connect an unused

input to BAT pin.

5

GND

Ground

BAT

SLEEP

AOUT1

DOUT1

AOUT2

DOUT2

IN2

GND

ISET

IN1

µMAX

TOP VIEW

+

MAX9621

1

4

5

2

3

10

9

8

7

6

MAX9621

Dual, 2-Wire Hall-Effect Sensor Interface

with Analog and Digital Outputs

www.maximintegrated.com

Maxim Integrated │ 10

Pin Description

Pin Configuration