MAX4209EVKIT+ Datasheet MAX4209EVKIT+ | P1-P3

General Description

The MAX4209 evaluation kit (EV kit) simplifies evaluation

of the MAX4208 ultra-low offset/drift, fixed gain, preci-

sion instrumentation amplifier in a µMAX

package. The

MAX4209 features high-impedance differential inputs

optimized for small voltages (±100mV max) and pro-

vides rail-to-rail output. The MAX4209 EV kit circuit uses

the 100V/V fixed-voltage-gain version of the MAX4209.

The EV kit operates from a single-supply voltage

between 2.85V and 5.5V, or dual supplies providing

±1.425V to ±2.75V.

The MAX4209 EV kit can also evaluate the 10V/V and

1000V/V fixed-gain versions of the MAX4209 amplifiers,

as well as the MAX4208 adjustable-gain amplifier. The

MAX4209 IC temperature range is -40°C to +125°C.

The MAX4208 EV kit, available separately, evaluates

the MAX4208 adjustable-gain amplifier with external

gain-setting resistors.

Note: To evaluate a MAX4208 IC featuring externally

adjustable gain, order a MAX4208EVKIT+ or request a

free sample of the MAX4208AUA+ IC along with the

MAX4209EVKIT+. For the alternate-gain versions of the

MAX4209 IC, see the

Part Selection Table

for IC ordering

information.

Features

o Single- or Dual-Supply Operation

2.85V to 5.5V Single-Supply Operation

±1.425V to ±2.75V Dual-Supply Operation

o 100V/V Fixed Voltage Gain

o Rail-to-Rail Output

o Configurable Reference Voltage: Externally or

Internally Buffered

o Optional Current-Sense Mode

o Fully Assembled and Tested

Evaluates: MAX4208/MAX4209

MAX4209 Evaluation Kit

________________________________________________________________

Maxim Integrated Products

19-0993; Rev 0; 9/07

Component List

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.

Ordering Information

Part Selection Table

PART TYPE

MAX4209EVKIT+ EV Kit

PART GAIN (V/V)

MAX4208AUA+ Adjustable

MAX4209TAUA+ 10

MAX4209HAUA+ 100

MAX4209KAUA+ 1000

DESIGNATION QTY DESCRIPTION

C1, C3 2

10µF ±10%, 10V X5R ceramic

capacitors (0805)

Murata GRM21BR61A106K

KEMET C0805C106K8PAC

C2, C4, C5 3

0.1µF ±10%, 10V X5R ceramic

capacitors (0402)

Murata GRM155R61A104K

KEMET C0402C104K8RACTU

C6, C7 0 Not installed, capacitors (0603)

C8 1

1000pF ±10%, 16V X5R ceramic

capacitor (0402)

Murata GRM155R61C102K

DESIGNATION QTY DESCRIPTION

JU1 1 4-pin header

JU2, JU3 2 2-pin headers

R1, R2 0 Not installed, resistors (0805)

R3, R4 2 4.99kΩ ±1% resistors (0603)

R5, R6 0 Not installed, resistors (0603)

R7 0 Not installed, resistor (1206)

U1 1 MAX4209HAUA+ (8-pin µMAX)

— 3 Shunts

— 1 PCB: MAX4209 Evaluation Kit+

Denotes lead-free and RoHS-compliant.

µMAX is a registered trademark of Maxim Integrated

Products, Inc.

Evaluates: MAX4208/MAX4209

MAX4209 Evaluation Kit

2 _______________________________________________________________________________________

Quick Start

Recommended Equipment

• 5V, 1A-rated DC power supply

• Function generator

• Oscilloscope

Procedure

The MAX4209 EV kit is fully assembled and tested.

Follow the steps below to verify board operation.

Caution: Do not turn on the power supply until all

connections are completed.

1) Verify that a shunt is installed across pins 1-4 of

jumper JU1 (on-board buffered-reference mode).

2) Verify that a shunt is installed on jumper JU2 (single-

supply operation).

3) Verify that a jumper is not installed on jumper JU3

(buffered-reference mode).

4) Set the DC power-supply output to 5V and disable

the output.

5) Set the function generator output to a 10mV

P-P

200Hz, 0V DC offset sine wave. Terminate the func-

tion generator as needed.

6) Connect the power-supply positive output to the

VDD PCB pad on the EV kit.

7) Connect the power-supply ground to the GND PCB

pad next to VDD on the EV kit.

8) Connect the function generator output across the

differential input PCB pads, IN+ and IN-.

9) Connect the IN- PCB pad to the GND PCB pad with

a wire.

10) Connect the oscilloscope to the OUT PCB pad and

the oscilloscope ground clip to the GND PCB pad.

11) Enable the DC power supply and the function gen-

erator.

12) Verify that the oscilloscope measures a 1V

P-P

200Hz, 2.5V DC offset sine wave.

Detailed Description

The MAX4209 EV kit evaluates the MAX4209 instrumenta-

tion amplifier that features internally fixed gain, low offset

voltage, and low offset voltage drift. The output-voltage

range is from VSS + 100mV, to VDD - 100mV. The

MAX4209 EV kit voltage gain is fixed at 100V/V. The EV

kit operates from a single-supply voltage between

2.85V and 5.5V or from a dual-supply voltage providing

±1.425V to ±2.75V.

The MAX4209 EV kit can evaluate the 10V/V or 1000V/V

versions of the MAX4209 ICs and the adjustable-gain

MAX4208 IC in the 8-pin µMAX package by replacing

the MAX4209 IC (U1). Install gain-setting resistors R1

and R2 for MAX4208 evaluation.

Power Supply

The MAX4209 EV kit jumper JU2 must be configured

properly for single-supply or dual-supply operation. For

single-supply operation, a single power supply is con-

nected to VDD and GND. For dual-supply operation,

connect a positive supply to VDD, a negative supply to

VSS, and supply ground to GND. See Table 1 to config-

ure jumper JU2.

Component Suppliers

Table 1. Power-Supply Configuration

(Jumper JU2)

Note: Indicate that you are using the MAX4208 or MAX4209 when contacting these component suppliers.

SUPPLIER PHONE WEBSITE

IRC 361-992-7900 www.irctt.com

KEMET Corp. 864-963-6300 www.kemet.com

Murata Mfg. Co., Ltd. 770-436-1300 www.murata.com

SHUNT

POSITION

VSS PIN EV KIT FUNCTION

Installed

Connected to

GND

Single-supply operation.

Power only VDD.

Not installed Not connected

Dual-supply operation.

Power VDD and VSS.

REFIN/MODE Operation Modes

The EV kit jumper JU1 configures the MAX4209 for direct

reference, buffered reference, or shutdown mode. The

reference voltage at REF sets the output voltage DC sig-

nal, OUT, when the differential input signal V

IN+

- V

IN-

equals zero. In direct-reference-mode operation, con-

nect a user reference voltage directly to the REF PCB

pad. In buffered-reference-mode operation, connect a

user reference voltage to the REFIN/MODE input PCB

pad or use the resistor-divider network R3 and R4 to

provide a reference voltage for REFIN/MODE, scaled

from VDD. The network is configured to scale the volt-

age at REFIN/MODE to one-half of VDD. Replace resis-

tors R3 and R4 to modify the voltage applied to

REFIN/MODE using the following equation:

where VDD is the input supply voltage to the EV kit.

In buffered-reference mode, the MAX4209 internally

buffers the REFIN/MODE voltage onto REF.

Note: Do not connect an external source to the REF PCB

pad in buffered-reference mode. See Table 2 for jumper

JU1 configurations.

REF Input

The EV kit’s jumper JU3 must be configured properly

for appropriate reference-voltage operation. In direct

reference mode, install a shunt on jumper JU3 to con-

nect REF to the on-board ground (GND), or remove the

shunt to connect a user reference voltage to the REF

input PCB pad. For either buffered-reference mode,

REF must not be connected to a reference voltage;

thus, the shunt on jumper JU3 must not be installed.

See Table 2 for jumper JU3 configurations.

Optional capacitor C6 can be used for reference-volt-

age stability/filtering. Choose an appropriate value as

needed.

On-Board Current Sensing

The MAX4209 EV kit can be configured for on-board

current sensing by installing a surface-mount 1206

sense resistor at R7, located between the IN+ and IN-

PCB pads. Use the following equation to select the

value for resistor R7:

where I

is the maximum current flowing across resis-

tor R7 and 30mV is a suggested sense voltage. 30mV x

100V/V gives a 3V output swing. Refer to the

30mV

V VDD x

R3 R4

REFIN/MODE

⎛

⎝

⎜

⎞

⎠

⎟

Evaluates: MAX4208/MAX4209

MAX4209 Evaluation Kit

_______________________________________________________________________________________ 3

Table 2. Jumpers JU1 and JU3 Configurations

MODE

JU1

SHUNT

POSITION

REFIN/MODE

JU3

SHUNT

POSITION

REF PIN EV KIT FUNCTION

Installed

Connected

to GND

JU1 disables the internal REF buffer. JU3 sets

the REF voltage to GND.

Direct-

reference-mode

operation

1-2

Connected to

VSS

Not

installed

Connected

to user

reference

voltage

JU1 disables the internal REF buffer. JU3 allows

the user to set the REF voltage directly. Apply a

user reference voltage to the REF PCB pad in

the 0V and VDD - 1.6V range.

Shutdown mode 1-3

Connected to

VDD

— — Entire IC is in shutdown. I

< 5µA.

Buffered-

reference-mode

operation (on-

board reference)

1-4

Connected to

VDD / 2

Not

installed

Not

connected

The IC buffers the on-board VDD / 2 onto REF.

Do not install JU3 or connect an external source

to the REF PCB pad.

Buffered-

reference-mode

operation (user

reference)

Not

installed

Connected to

user

reference

voltage

Not

installed

Not

connected

The IC b uffer s a user r efer ence vol tag e onto RE F.

Ap p l y a user r efer ence vol tag e to the

RE FIN /M O D E P C B p ad i n the r ang e of V S S +

200m V and V D D - 1.6V . D o not i nstal l JU 3 or

connect an exter nal sour ce to the RE F P C B p ad .

P1-P3 P4-P6

MAX4209EVKIT+

Mfr. #:

Buy MAX4209EVKIT+

Manufacturer:

Maxim Integrated

Description:

KIT EVAL FOR MAX4209

Lifecycle:

New from this manufacturer.

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MAX4209EVKIT+