max9621 Maxim Integrated Products, Inc., max9621 Datasheet
max9621
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max9621 Summary of contents
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... 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 ...
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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, ...
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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 ...
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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 ...
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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 ...
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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 ...
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... SLEEP V IN1 I IN1 V AOUT1 CURRENT GAIN vs. TEMPERATURE 0.07 0.06 0.05 0.04 0.03 -50 - 100 125 TEMPERATURE (NC) REENERGIZING OF THE HALL INPUT FROM OPEN-CIRCUIT CONDITION MAX9621 toc22 100µs/div STARTUP OF IN_/DOUT_ FROM SHUTDOWN MAX9621 toc24 20µs/div V IN1 V AOUT1 V DOUT1 I IN1 V SLEEP V IN1 I IN1 V DOUT1 7 ...
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... IN2 determine the high/low state of the sensor. Bypass to GND with a 0.01FF capacitor. Connect an unused input to BAT pin. 5 GND Ground 8 TOP VIEW + BAT 1 ISET 2 MAX9621 IN1 3 IN2 4 GND 5 µMAX FUNCTION ) between BAT and ISET to set the desired input current SET Pin Configuration 10 ...
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... GND. Any Hall input that is operational is not affected when SLEEP is cycled low for less than 20Fs. There is an internal 100kI pulldown resistance to GND. Detailed Description The MAX9621, an interface between two 2-wire Hall- effect sensors and a low-voltage microprocessor, sup- plies and monitors current through IN1 and IN2 to two Hall sensors. The MAX9621 complements Maxim’ ...
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... Low* Figure 3 shows the behavior of the MAX9621 when a Hall input is open. Figure 4 shows the behavior of the MAX9621 when the open input is reconnected to a Hall sensor. Figures 3 and 4 demonstrate how a short-to- ground Hall input can be reset. Resetting a short-to- - 100mV. The digi- ground Hall input involves three steps: 1) Relieve the short to ground at the Hall sensor ...
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... 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. Pull SLEEP low for more than 40Fs to put the device into sleep mode for power saving. In sleep mode, the DOUT1 and DOUT2 outputs are high impedance and are pulled high by pullup resistors ...
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... TLE4941/C Sleep mode can be used in applications that do not continuously require the polling of the Hall sensors. In such cases, the FP can enable the MAX9621 for a short time, check the sensor status, and then put the MAX9621 back to sleep. A blanking period follows upon exiting sleep mode ...
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... DETECTION IN2 N 0.01 µ REMOTE GROUND Analog and Digital Outputs Typical Application Circuit 0.1µF BAT REF REFERENCE SLEEP-MODE CONTROL BAT FILTER REF BAT MAX9621 FILTER REF GND PROCESS: BiCMOS 1. 10kI 10kI SLEEP 100kI AOUT1 ADC 5kI DOUT1 MICROPROCESSOR AOUT2 ...
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... 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 © 2009 Maxim Integrated Products Package Information PACKAGE CODE U10+2 α α Maxim is a registered trademark of Maxim Integrated Products, Inc. DOCUMENT NO. 21-0061 ...