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MAX9636 Evaluation Kit

Evaluates: MAX9636

General Description

The MAX9636 evaluation kit (EV kit) is an assembled

and tested PCB used to evaluate the MAX9636 low-

power, low-noise, CMOS input op amp, which is suitable

for photodiode transimpedance front-ends in portable

medical instruments. The EV kit is preconfigured for

a transimpedance amplifier (TIA). Additionally, an on-

board LED driver circuit provides a controlled light

source to help evaluate the performance of the MAX9636

TIA circuit. The EV kit can easily be adapted to act as

noninverting, inverting, or differential amplifier by chang-

ing a few components. Another EV kit is offered for the

MAX9638 dual version of this op amp to enable evalua-

tion in an active filter circuit configuration.

The EV kit comes with a MAX9636AXT+ installed.

Features

S Accommodates Multiple Op-Amp Configurations

S On-Board LED Driver

S Accommodates Multiple Wavelength LEDs

S Proven PCB Layout

S Fully Assembled and Tested

Ordering Information

19-5287; Rev 0; 5/10

+Denotes lead(Pb)-free and RoHS compliant.

Component List

Component Suppliers

Note: Indicate that you are using the MAX9636 when contacting these component suppliers.

PART TYPE

MAX9636EVKIT+ EV Kit

DESIGNATION QTY DESCRIPTION

C1 1

18pF Q5%, 50V C0G ceramic

capacitor (0603)

TDK C1608C0G1H180J

C2, C7, C8, C9 4

0.1FF Q10%, 16V X7R ceramic

capacitors (0603)

Murata GRM188R71C104K

C3, C6 0

Not installed, ceramic capacitors

(0603)

C4 0

Not installed, ceramic capacitor

(0805)

C5 1

4.7FF Q10%, 25V X5R ceramic

capacitor (0805)

Murata GRM21BR61E475K

D1 1

Red side LED

(4mm x 3.6mm x 4mm)

OSRAM LS A676-R1S1

DESIGNATION QTY DESCRIPTION

D2 1

Photodiode

Vishay BPW46

JU1, JU2 2 3-pin headers

M1 1

n-channel MOSFET (6 SC70)

Fairchild FDG410NZ

R1, R6, R7 3

0I Q5% resistors (0603)

R2 1

10kI Q1% resistor (0603)

R3, R9, R12 0 Not installed, resistors (0603)

R4 1

100kI Q1% resistor (0603)

R5 1

249I Q1% resistor (0603)

R8, R10, R11 3

976I Q1% resistors (0603)

TP1 1 Red test point

U1, U2 2

Low-power op amps (6 SC70)

Maxim MAX9636AXT+

— 2 Shunts

— 1

PCB: MAX9636 EVALUATION

KIT+

SUPPLIER PHONE WEBSITE

Fairchild Semiconductor 888-522-5372 www.fairchildsemi.com

Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com

TDK Corp. 847-803-6100 www.component.tdk.com

Vishay 402-563-6866 www.vishay.com

Summary of content (6 pages)

PAGE 1
9-5287; Rev 0; 5/10 MAX9636 Evaluation Kit The MAX9636 evaluation kit (EV kit) is an assembled and tested PCB used to evaluate the MAX9636 lowpower, low-noise, CMOS input op amp, which is suitable for photodiode transimpedance front-ends in portable medical instruments. The EV kit is preconfigured for a transimpedance amplifier (TIA). Additionally, an onboard LED driver circuit provides a controlled light source to help evaluate the performance of the MAX9636 TIA circuit.
PAGE 2
Evaluates: MAX9636 MAX9636 Evaluation Kit Quick Start Required Equipment • MAX9636 EV kit • 2.1V to 5.5V DC power supply (e.g., Agilent E3620A) 10) Verify that the red LED (D1) turns on. At 1kHz, the LED pulsing cannot be seen due to persistence of vision. Verify that the oscilloscope screen shows a square waveform with an approximate 1kHz frequency. Detailed Description of Hardware • Function generator (e.g., Agilent 33220A) • Digital oscilloscope (e.g.
PAGE 3
MAX9636 Evaluation Kit The silicon pin photodiode (BPW46) has a spectral bandwidth that ranges from 430nm to 1100nm. Hence, the EV kit can also be used with LEDs that range from visible light to infrared light. Table 2 gives a list of LEDs that have the same footprint as installed LED D1, but with different wavelengths. When changing D1, replace R8, R10, R11, and R12 with the appropriate resistor values. Noninverting Configuration The EV kit can also be configured as a noninverting amplifier.
PAGE 4
Evaluates: MAX9636 MAX9636 Evaluation Kit Figure 1.
PAGE 5
MAX9636 Evaluation Kit Evaluates: MAX9636 1.0’’ Figure 2. MAX9636 EV Kit Component Placement Guide— Component Side 1.0’’ Figure 3. MAX9636 EV Kit PCB Layout—Component Side 1.0’’ Figure 4.
PAGE 6
MAX9636 Evaluation Kit Evaluates: MAX9636 Revision History REVISION NUMBER REVISION_ DATE 0 5/10 DESCRIPTION Initial release PAGES_ CHANGED — Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.