Texas Instruments Evaluation Module for Sensor Signal Conditioning IC for Closed-Loop Magnetic Current Sensors DRV411EVM DRV411EVM Datenbogen
Produktcode
DRV411EVM
Power Supply, Reference, and Gain Options
2.1
Default Jumper Settings
provides descriptions of the jumpers on the EVM and their function:
Table 1. Jumper Descriptions
Jumper
Default State
Description
GSEL1
Open
Gain select options, selects the gain of the Hall amplifier
GSEL2
Open
Gain select options, selects the gain of the Hall amplifier
REFSEL1
Open
Reference select options, selects the reference mode
REFSEL2
Open
Reference select options, selects the reference mode
2.2
Available Test Points
provides descriptions of the test points on the EVM and their functions:
Table 2. Test Point (TP) Descriptions
TP Name
Description
VCC
EVM power, monitor with respect to GND test point
GND
System ground, there are 5 GND test points for ease of monitoring
IAIN1
Inverting input of the differential amplifier
IAIN2
Non-inverting input of the differential amplifier
ERROR
Error flag output (open drain output with 10-k
Ω pull-up)
OR
Over Range Indicator (open drain output with 10-k
Ω pull-up)
VOUT
Output of the differential amplifier
REFIN
Input for zero reference to differential amplifier
Other
There are four additional test points for use in monitoring the state of the reference select
pins as well as the gain select pins
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.
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.
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’).
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’).
provides a description of
the available options:
Table 3. Voltage Selection Options
Mode
REFSEL1
REFSEL2
Description
REF = 2.5 V
Open
Open
Used with Hall-sensor supply of 5 V
REF = 1.65 V
Closed
Open
Used with Hall-sensor supply of 3.3 V
Ratiometric Output
Closed
Closed
Provides a reference output centered on VCC/2
3
SLVU772A – August 2013 – Revised November 2013
DRV411EVM User's Guide
Copyright © 2013, Texas Instruments Incorporated