Jumper Information; Best Practices - Texas Instruments REF54EVM User Manual

Hardware
2.2 EVM Connection
The headers of REF54EVM are named similar to pin name of REF54250CDR for easy understanding. Default
EVM setup is shown in Figure
2 of EN1 header can be connected to power supply directly or pin 1 of EN1 header to enable the device. The
user can also leave EN1 header floating to enable the output. PIN 2 of EN is connected to PIN 3 to disable the
device. Output is measured between pin 2 of VOUT1 header and GND_S header. The user can connect R3 to
get lower noise output with NR pin. Please refer to the REF54 data sheet for more details on NR pin.
GND_F
VIN_F
EN Jumper connec o n
¡
Table 2-1 lists the detailed function of VIN1 and EN1 header.
Terminal
VIN1
EN1

2.3 Jumper Information

REF54EVM can be configured to enable or disable the output through jumpers ate EN1 header..
Terminal
EN

2.4 Best Practices

• Use the power supply which has very good PSRR.
• Measure the output with high resolution instrument (DMM , oscilloscope) for best performance.
• Connect VOUT1 and GND_S pin to data converter EVM for best performance.
4 REF54 Evaluation Module
2-2. Input power supply must be connected between VIN1 and GND1 header. Pin
Figure 2-2. REF54EVM Default Setup
Table 2-1. REF54 EVM Input Connection
Pin Connection
VIN
EN
Table 2-2. REF54 EVM Input connection
Pin Connection
EN
Copyright © 2023 Texas Instruments Incorporated
Function
Connect to power supply.
Connect jumper between pin 2 and 3 to enable the output
Connect Jumper between pin 2 and 1 to disable the output
Jumper Function
Connect jumper between pin 2 and 3 to enable the output
Connect Jumper between pin 2 and 1 to disable the output
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VREF
GND
SNAU289 – AUGUST 2023
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