BOOSTXL-TLC2543 EVM Overview
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SNAU232 – July 2018
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BOOSTXL-TLC2543 EVM User Guide
Table 1. Input Connector and Channel Configuration (continued)
J10 Connector Pin
Description
J10:12
Analog input for channel 9 of ADC
J10:13
Analog input for channel 10 of ADC
J10:15 and J10:16
BoosterPack™ Plug-in Module ground
J10:14, 17, 18, 19, 20
No Connection
The analog input range is from GND to +VREF. A maximum of 11 single-ended inputs may be applied to
J10 using pins J10:1 to J10:4 and J10:7 to J10:13.
The user can configure the input to channel 0 to use the OPA2320 buffer through a 100-
Ω
resistor with an
1000-pF capacitor to GND. Jumper J7 can be placed on pins 1-2 to select this unity gain buffer
configuration of the OPA2320. In this case, the channel 0 input is provided through the SMA connector J8.
The user can also place Jumper J12 on pins 1-2 to create a similar configuration for a channel 1 input
provided through the SMA connector J13.
2.2
Voltage Reference
The BOOSTXL-TLC2543 EVM has two sources for the reference voltage. Jumper J11 can select the
VREF voltage from either the REF5045A (U9) or from 5-V VCC. The EVM is factory-configured for use
with the REF5045A 4.5-V reference (J11 pins 2-3).
2.3
Digital Interface
As noted in
Section 1
, the BOOSTXL-TLC2543 EVM interfaces with the TM4C1294 LaunchPad
Development Kit, which in turn communicates with the computer over USB. The two devices on the
booster pack that the TM4C1294 communicates with are the TLC2543-Q1 ADC (over SPI) and the
EEPROM (over I
2
C). The EEPROM comes preprogrammed with the information required to configure and
initialize the BOOSTXL- TLC2543 EVM platform every time on power up.
2.4
BOOSTXL-TLC2543 Digital I/O Interface
The BOOSTXL-TLC2543 EVM supports the SPI digital interface and functional modes as detailed in the
TLC2543-Q1
data sheet. The TM4C1294 LaunchPad Development Kit is operating at a 3.3-V logic level
and is connected to the 5-V digital I/O lines of the ADC through level shifters (SN74LVC1T45QDCURQ1
and SN74LVC2T45QDCURQ1).
2.5
Power Supply
The device supports a single power supply with a wide range of operation. The VCC can operate from 2.7
V to 5 V. The available onboard TPS79901 adjustable voltage regulator is configured to supply 5 V to the
TLC2543-Q1 VCC pin on the BOOSTXL-TLC2543 EVM.
