MAX9921AUB/V+T Maxim Integrated Products, MAX9921AUB/V+T Datasheet - Page 9

• Manufacturer Part Number: MAX9921AUB/V+T
• Description: IC HALL EFFECT SENSOR DL 10UMAX
• Manufacturer: Maxim Integrated Products
• Type: Hall Effect Sensorr

Specifications of MAX9921AUB/V+T

• Input Type: Voltage
• Output Type: Logic
• Interface: 2-Wire
• Current - Supply: 1.3mA
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIN
10
1
2
3
4
5
6
7
8
9
NAME
OUT2
OUT1
DIAG
GND
ISET
BAT
ERR
IN1
IN2
OE
Battery Power Supply. Connect BAT to the positive supply through an external reverse-polarity diode. Bypass BAT
to ground with a 0.1µF capacitor.
Current-Setting Input. Connect a 63.4kΩ, 1% resistor (R
thresholds for Hall current sensing. Make no other connections to ISET. All routing must have low parasitic
capacitance.
Hall-Effect Sensor Input 1. Bypass IN1 to BAT or GND with a 0.01µF capacitor. Terminate an unused input with a
1.5kΩ resistor from IN1 to GND to prevent false error diagnostics.
Hall-Effect Sensor Input 2. Bypass IN2 to BAT or GND with a 0.01µF capacitor. Terminate an unused input with a
1.5kΩ resistor from IN2 to GND to prevent false error diagnostics.
Ground
Open-Drain Output Signal 2. OUT2 is the signal translated from Hall Sensor 2. Connect a 10kΩ or larger pullup
resistor to logic supply.
Open-Drain Output Signal 1. OUT1 is the signal translated from Hall Sensor 1. Connect a 10kΩ or larger pullup
resistor to logic supply.
Open-Drain Diagnostic and Error Output. Connect a 10kΩ or larger pullup resistor to logic supply. If DIAG is
asserted low, a high on ERR indicates that there is no fault while a low on ERR indicates that either the battery
voltage is out of range or there is a fault condition. If DIAG is high, ERR provides diagnostic information in
conjunction with OUT1 and OUT2. See Tables 1 and 2. If OE is low or while in shutdown, ERR is high impedance.
Output Enable Input. OE has an internal 80kΩ resistor to GND. Drive OE high to enable the outputs ERR, OUT1,
and OUT2. Drive OE low to place the outputs in high impedance. If OE and DIAG are both low for more than 40µs,
the device enters shutdown and all outputs are in high impedance. While in shutdown, if either OE or DIAG
transitions low to high, the device exits shutdown mode.
Diagnostic Enable Input. DIAG has an internal 80kΩ resistor to GND. Drive DIAG low for normal operation. In this
mode, ERR, OUT1, and OUT2 provide Hall sensor information. Drive DIAG high for diagnostic operation. A high-to-
low transition initiates an attempt to restart, with a blanking cycle any Hall input that has been shut down. See
Tables 1 and 2 (diagnostic truth tables). If OE and DIAG are both low for more than 40µs, the device enters
shutdown mode with all outputs in high impedance. While in the shutdown mode, if either OE or DIAG transitions
low to high, the device exits shutdown mode.
Dual, 2-Wire Hall-Effect Sensor Interface
_______________________________________________________________________________________
FUNCTION
ISET
) between BAT and ISET to set the standard current
with Diagnostics
Pin Description
9