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2 Hardware Features

This section describes the hardware features found on the XTR111EVM.

2.1 XTR111EVM

The XTR111EVM is used for the basic functional evaluation of the XTR111. The EVM provides the

following features:

? Easy handling of the small DFN package. The DFN device is already soldered to the landing pattern

on the PCB. A mechanical drawing of the recommended land pattern can be found at the end of the

XTR111 product data sheet.

? Easy access to all device pins.

? Easily-configurable digital inputs (OD and EF) to disable the output, modify the output circuit for

voltage output, or apply a 4-mA signal shift.

? LED indicator for the error flag, EF.

? Output protection and filtering circuitry.

The XTR111EVM is initially configured to a basic setup for 0 mA to 20 mA operation with a 0-V to 5-V

input. Note that although the accuracy of the gain setting resistor, RSET, used in the EVM is 0.1, the

XTR111 device has greater accuracy. The remaining resistors are standard 1. The voltage regulator is

set to 5 V.

The EVM requires one external power-supply voltage with a range of 8 V to 40 V.

Refer to the XTR111 product data sheet for comprehensive information about the XTR111 and possible

device configurations. Figure 1 shows the XTR111 EVM.