________________________________________________________________ _Maxim Integrated Products_ _ 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

MAX9934T Evaluation Kit

General Description

The MAX9934T evaluation kit (EV kit) demonstrates

the MAX9934T low-voltage, precision, current-sense

amplifier for power management in portable consumer

electronics. The device’s precision inputs and the EV

kit’s on-board, precision, low-value sense resistor allows

the measurement of bidirectional (e.g., battery charge/

discharge) currents up to 1A. Input common-mode

range is -0.1V to +5.5V independent of supply. The

device demonstrates a 25FA/mV fixed gain and the

EV kit is configured for a 250V/V gain. The device’s

chip-select (CS) logic input allows users to multiplex

several MAX9934T parts. The EV kit operates from a

+2.5V to +3.6V, 100mA DC power supply.

The EV kit can also be used to evaluate the MAX9934F

current-sense amplifier. See the Evaluating the MAX9934F

section for more information.

Features

S

EV_Kit_Configured_for_Bidirectional_Current_

Sensing_Up_to_1A

S

EV_Kit_Configured_for_250V/V_Gain

S

Chip-Select_(CS)_Logic_Input

S

-0.1V_to_+5.5V_Input_Common-Mode_Range

S

+2.5V_to_+3.6V_DC_Power-Supply_Operation

S

Proven_PCB_Layout

S

Fully_Assembled_and_Tested

Ordering Information

Selector Guide

19-5273; Rev 0; 7/10

+

Denotes lead(Pb)-free and RoHS compliant.

Component List

UCSP is a trademark and µMAX is a registered trademark of

Maxim Integrated Products, Inc.

PART

TYPE

MAX9934TEVKIT+

EV Kit

PART

GAIN

OUTPUT

LOGIC_PIN

MAX9934T

25FA/mV

Current

Chip-select input

MAX9934F

5FA/mV

Current

Chip-select input

DESIGNATION

QTY

DESCRIPTION

C1

1

4.7FF Q10%, 16V X7R ceramic

capacitor (0805)

Murata GRM219R71C475K

C2, C4, C5

3

0.1FF Q10%, 16V X7R ceramic

capacitors (0603)

Murata GRM188R71C104K

C3

1

0.01FF Q10%, 16V X7R ceramic

capacitor (0603)

Murata GRM188R71C103K

C6

0

Not installed, ceramic capacitor

(0603)

GND

2

Black miniature PCB test points

GND,

OUT_REF

2

Black multipurpose PCB test

points

JU1, JU2, JU3

3

2-pin headers

OUT

1

Red multipurpose PCB test point

DESIGNATION

QTY

DESCRIPTION

R1

1

10mI Q0.1%, Q15ppm/°C

4-terminal resistor (2512)

Vishay Y14870R01000B9

R2

1

10kI Q0.1%, Q25ppm/°C

resistor (0603)

Panasonic ERA-3YEB103V

R3, R4

2

10kI Q5% resistors (0603)

RS+, RS-

2

White miniature PCB test points

U1

1

Current-sense amplifier

(6 UCSPK)

Maxim MAX9934TART+

(Top Mark: AAF)

U2

1

Current-sense amplifier

Maxim MAX9934TAUA+

—

3

Shunts (JU1, JU2, JU3)

—

1

PCB: MAX9934T EVALUATION

KIT+