MAX9934T Evaluation Kit

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Table_2._U2_CS_Pin_Logic_Input_(JU3)

Table_1._U1_CS_Pin_Logic_Input_(JU2)

Chip Select (CS)

Jumpers JU2 and JU3 enable or disable the respective

amplifier’s output by controlling the device’s CS pins

on U1 and U2, respectively. An external controller can

drive the U1 and U2 CS input pins using the EV kit’s

CS1(SIGN1) and CS2(SIGN2) PCB pads, respectively.

The CS pins are compatible with +1.8V through +3.3V

logic. Connect the external controller’s logic ground

return to a GND PCB pad and remove pullup resistors R3

and R4, if not needed. See Tables 1 and 2 for jumpers

JU2 and JU3 configuration.

Evaluating the MAX9934F

To evaluate the MAX9934F, replace U1 (3 x 2-bump

UCSP) or U2 (8-pin FMAX) with the appropriate version.

The device can be multiplexed with other MAX9934F

parts. See the Chip Select (CS) section for additional

information.

Output Measurements

The device provides a current output that can be

measured across the OUT and OUT_REF PCB pads.

Connect a 1.65V reference voltage across the OUT_REF

and GND PCB pads.

SHUNT_

POSITION

U1_CS_PIN_

CONNECTION

EV_KIT_FUNCTION

Not

installed

Pulled up to VCC

through R3

U1 output enabled

Installed

GND

U1 output disabled

(high impedance)

SHUNT_

POSITION

U2_CS_PIN_

CONNECTION

EV_KIT_FUNCTION

Not

installed

Pulled up to VCC

through R4

U2 output enabled

Installed

GND

U2 output disabled

(high impedance)