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3.2 Digital Interface
As noted in
TLA2024EVM-to-PAMBoard
communicates with the computer over USB. The two devices on the EVM requiring communication are the
TLA2024 ADC (U1) and the electrically-erasable programmable read-only memory (EEPROM) (U3) using I
(see
Figure
6-5). The EEPROM is preprogrammed with the information required to configure and initialize the
TLA2024EVM-PDK GUI software platform. Once the hardware is initialized through the software, the EEPROM
is no longer used.
The PAMBoard and EEPROM (U3) use 3.3 V for the device interface logic levels. The TLA2024 can operate at
either 3.3 V or 5 V as desired by jumper selection JP1. To allow the TLA2024 to operate at 5-V logic levels, a
logic level translator (U2) is used.
3.3 Analog Input Connections
The TLA2024 device is designed for easy interface to an external sensor that is differential or single-ended using
either a header (J6) or a screw terminal block (J5). Connector J6 provides an easy interface connection for
differential input pairs with each pair separated by analog ground.
for J5 and
Table 3-3
shows the input connections for J6. Both connectors are clearly labeled on the
silkscreen
for easy input connection identification.
Connector J5 is a screw terminal block for attaching an external sensor with bare wire connections. The terminal
block includes all four inputs and a connection point for analog ground. See
J5 Terminal Block Inputs
Connector J6 is a 100-mil spaced dual-row header. Jumper wire or clip leads can be used for connections. The
header includes all four inputs and two analog ground connections. See
J6 Terminal Block Inputs
SBAU368 – FEBRUARY 2021
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Interface, the TLA2024 interfaces with the PAMBoard. The PAMBoard
Table 3-2. Terminal Block Input (J5)
J5:1
J5:2
J5:3
J5:4
J5:5
Figure 3-2. Analog Input Terminal Block (J5)
Table 3-3. Terminal Block Input (J6)
J6:1
J6:2
J6:3 and J6:4
J6:5
J6:6
Copyright © 2021 Texas Instruments Incorporated
TLA2024EVM-PDK Overview
Table 3-2
lists the channel input connections
Figure 3-2
for the input layout.
Description
Analog input for AIN0 of the ADC
Analog input for AIN1 of the ADC
Analog input for AIN2 of the ADC
Analog input for AIN3 of the ADC
Analog Ground
Figure 3-3
for the input layout.
Description
Analog input for AIN0 of the ADC
Analog input for AIN1 of the ADC
Analog Ground
Analog input for AIN2 of the ADC
Analog input for AIN3 of the ADC
TLA2024EVM-PDK User's Guide
2
C
PCB
9
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