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Evaluates: MAX14626

MAX14626 Evaluation Kit

Quick Start

Required Equipment

● MAX14626EVkit

● 25VDCpowersupply

● Ammeter

Procedure

The EV kit is fully assembled and tested. Follow the steps

below to verify board operation:

1) Verify that all jumpers are in their default positions,

as shown in Table 1.

2) Install shunts on jumpers JU7 and JU8.

3) Connect one side of the ammeter to 25V power

supply and the other side to TP1 to measure the

current going through the device and load.

4) Connect the ground of the power supply to TP2.

5) Install a shunt on jumper JU2.

6) Turn on the 25V power supply. Verify that the

ammeter reading is approximately 30mA.

7) Turn off the power supply.

8) Remove the shunt on JU2. Install a shunt on

jumper JU3.

9) Turn on the 25V power supply. Verify that the

ammeter reading is approximately 30mA.

10) Turn off the power supply.

11) Remove the shunt on JU3. Install a shunt on

jumper JU4.

12) Turn on the 25V power supply. Verify that the

ammeter reading is approximately 19.6mA.

13) Turn off the power supply.

14) Remove the shunt on JU4. Install a shunt on

jumper JU5.

15) Turn on the 25V power supply. Verify that the amme-

ter reading is approximately 10.9mA.

16) Turn off the power supply.

Detailed Description of Hardware

The MAX14626 EV kit is a fully assembled and tested

circuit board demonstrating the MAX14626 high-voltage

4–20mA current-loop protector IC in a 6-pin surface-

mount TDFN package with an exposed pad.

Using all the jumpers, the EV kit circuit can be configured

to evaluate the current-limit capability of the device. For

example,withshuntsonJU7andJU8,theloadis249Ω.

With shunt on JU2, the added resistance is 200Ω.The

on-resistance of the device is approximately 25Ω. With

25V input, the current going through the device can be

calculatedas25V/(249Ω+25Ω+200Ω)=52.7mA,but

the actual current going through is limited by the device to

be approximately 30mA.

Table 1. Jumper Settings (JU1–JU8)

*Default position.

JUMPER

SHUNT

POSITION

DESCRIPTION

JU1

Installed TP1 connected directly to IN