DRV411EVM Datasheet, PDF (3/13 Pages) Texas Instruments – DRV411EVM Users Guide

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Power Supply, Reference, and Gain Options
2.1 Default Jumper Settings
Table 1 provides descriptions of the jumpers on the EVM and their function:
Jumper
GSEL1
GSEL2
REFSEL1
REFSEL2
Table 1. Jumper Descriptions
Default State
Open
Open
Open
Open
Description
Gain select options, selects the gain of the Hall amplifier
Gain select options, selects the gain of the Hall amplifier
Reference select options, selects the reference mode
Reference select options, selects the reference mode
2.2 Available Test Points
Table 2 provides descriptions of the test points on the EVM and their functions:
Table 2. Test Point (TP) Descriptions
TP Name
VCC
GND
IAIN1
IAIN2
ERROR
OR
VOUT
REFIN
Other
Description
EVM power, monitor with respect to GND test point
System ground, there are 5 GND test points for ease of monitoring
Inverting input of the differential amplifier
Non-inverting input of the differential amplifier
Error flag output (open drain output with 10-kΩ pull-up)
Over Range Indicator (open drain output with 10-kΩ pull-up)
Output of the differential amplifier
Input for zero reference to differential amplifier
There are four additional test points for use in monitoring the state of the reference select
pins as well as the gain select pins
3 Power Supply, Reference, and Gain Options
The EVM requires a single power supply in the range of +2.7-V to +5.5-V DC, for proper operation of the
device. The EVM (without a Hall sensor installed) draws less than 10 mA at 5.5 V.
Power can be applied to the EVM via the banana jacks labeled VCC and GND, or through clip leads
directly to the VCC and GND test points. When operating the EVM, TI recommends to use a linear DC
bench supply, current limited to 50 mA.
3.1 Reference Voltage Selection
The EVM provides two jumpers to configure the reference voltage output selection. The reference
selection input pins are pulled to ground, or logic ‘0’ by default (jumpers ‘open’). Closing the jumpers
places the associated REFSEL pin at the applied Vcc potential (logic ‘1’). Table 3 provides a description of
the available options:
Mode
REF = 2.5 V
REF = 1.65 V
Ratiometric Output
REFSEL1
Open
Closed
Closed
Table 3. Voltage Selection Options
REFSEL2
Open
Open
Closed
Description
Used with Hall-sensor supply of 5 V
Used with Hall-sensor supply of 3.3 V
Provides a reference output centered on VCC/2
SLVU772A – August 2013 – Revised November 2013
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DRV411EVM User's Guide
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