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MAXREFDES24EVSYS User Manual

Rev 0 8

3.5 Analog Signal Connections

The diagram below shows an example connection between an analog output (OUT1) on MAXREFDES24 and

an analog input (AIN0) on MAXADCLITE2 along with the ground connection between the two analog grounds

(AGND). All analog grounds are tied together on MAXREFDES24.

JU3

JU1

JU7

JU5

JU4

JU6

OUT1

OUT

OUT3

OUT4

1 2 3

AIN0

AIN1

GND

MAXREFDES24

MAXADCLITE2

The jumpers shown above for the MAXREFDES24 select between 5% (default) and 20% overrange modes

while the jumpers shown for MAXADCLITE2 select the on-board termination resistor for testing current loops.

The following table summarizes the analog output signal ranges for the MAXREFDES24 design along with the

required hardware jumper settings. See the Graphical User Interfaces

section for all other mode controls.

OUTPUT SIGNAL

RANGE

MAX15500 OVERRANGE

CONTROL

MAXADCLITE2

FSMODE

(JU1, JU2,

JU3, JU4)

SENSER

(JU2, JU4,

JU6, JU8)

AIN

TERMINATION

(J4, J9)

0–20mA + 5%

-140µA to 21mA

Don’t Care

Jumper 2:3

Jumper Closed

(500Ω Load)

20mA + 5%

-21mA to 21mA

0-20mA + 20%

-150µA to 24mA

Jumper 1:2

20mA + 20%

-24mA to 24mA

0–5V + 5% -0.28V to 5.36V

Jumper 1:2

Don’t Care

Jumper Open

(1kΩ Load)

0–10V + 5% -0.56V to 10.71V

0–5V + 20% -0.31V to 6.08V

Jumper 2:3

0–10V + 20%

-0.63V to 12.16V

10V + 20%

-12.28V to 12.28V

Note the output range of the MAXREFDES24 analog outputs exceeds the input range capabilities of the

MAXADCLITE2 board, which only supports unipolar signals up to 10V or 20mA. Signals outside of this range

will be clamped by on-board protection diodes.

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 16 17

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