Datasheet

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General Description

The MAX9814 evaluation kit (EV kit) is a fully assembled

and tested PCB that is used to evaluate the single-

supply MAX9814 low-noise microphone amplifier IC.

The MAX9814 IC contains a low-noise amplifier, an out-

put amplifier, a microphone bias-voltage generator, and

automatic gain-control (AGC) internal circuitry. The

overall gain of the microphone amplifier is selectable to

40dB, 50dB, or 60dB without compression. The

MAX9814 incorporates compressor/limiter circuitry that

limits the microphone output to a set voltage.

The MAX9814 EV kit operates over a 2.7V to 5.5V

range. The EV kit also features low quiescent current,

and shutdown control to minimize power consumption.

The MAX9814 IC is available in a 14-pin TDFN (3mm x

3mm x 0.8mm) exposed paddle package.

Features

o 2.7V to 5.5V Single-Supply Operation

o 20dB of Dynamic Gain Compression

o Selectable Gain Control

o Programmable Attack Time

o Selectable Attack/Release Ratio

o Low-Power Shutdown Mode

o Fully Assembled and Tested

Evaluates: MAX9814

MAX9814 Evaluation Kit

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Maxim Integrated Products

Ordering Information

DESIGNATION

QTY

DESCRIPTION

C1 1

0.22µF ±10%, 6.3V X5R ceramic

capacitor (0402)

TDK C1005X5R0J224K

C2, C7, C9 3

0.1µF ±10%, 10V X5R ceramic

capacitors (0402)

TDK C1005X5R1A104K

C3 1

0.047µF ±10%, 25V X7R ceramic

capacitor (0402)

TDK C1005X7R1E223K

C4 1

0.022µF ±10%, 25V X7R ceramic

capacitor (0402)

TDK C1005X7R1E223K

C5 1

2.2µF ±10%, 6.3V X5R ceramic

capacitor (0603)

TDK C1608X5R0J225K

C6 1

1µF ±10%, 6.3V X5R ceramic

capacitor (0603)

TDK C1608X5R1A105KB

C8 1

0.47µF ±10%, 6.3V X5R ceramic

capacitor (0402)

TDK C1005X5R0J474K

DESIGNATION

QTY

DESCRIPTION

J1 1

Nonswitched PC-mount RCA jack,

black

J2 1

Nonswitched PC-mount RCA jack,

red

JU1, JU2, JU3

3 3-pin headers

JU4, JU5, JU6

3 2-pin headers

R1 1 150kΩ ±1% resistor (0402)

R2 1 100kΩ ±1% resistor (0402)

R3 1 2.21kΩ ±1% resistor (0402)

U1 1 MAX9814ETD+ (14-pin TDFN)

— 6 Shunts (JU1–JU6)

— 1 PCB: MAX9814 Evaluation Kit

Component List

19-0760; Rev 0; 4/07

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Denotes a lead-free and RoHS-compliant EV kit.

EV kit PCB temperature range only.

**EP

= exposed paddle.

PART TEMP RANGE IC PACKAGE

MAX9814EVKIT+ 0°C to +70°C* 14 TDFN-EP**

SUPPLIER PHONE WEBSITE

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

Component Supplier

Note: Indicate that you are using the MAX9814 when contacting

this component supplier.

Summary of content (5 pages)

PAGE 1
9-0760; Rev 0; 4/07 MAX9814 Evaluation Kit The MAX9814 evaluation kit (EV kit) is a fully assembled and tested PCB that is used to evaluate the singlesupply MAX9814 low-noise microphone amplifier IC. The MAX9814 IC contains a low-noise amplifier, an output amplifier, a microphone bias-voltage generator, and automatic gain-control (AGC) internal circuitry. The overall gain of the microphone amplifier is selectable to 40dB, 50dB, or 60dB without compression.
PAGE 2
Evaluates: MAX9814 MAX9814 Evaluation Kit Quick Start Detailed Description Recommended Equipment The MAX9814 EV kit is used to evaluate the MAX9814 low-noise microphone amplifier IC, which is designed for single-supply applications. The power supply must provide a minimum 200mA to the MAX9814 EV kit, which has an operating range of 2.7V to 5.5V.
PAGE 3
MAX9814 Evaluation Kit Table 1. Shutdown Configuration (JU1) SHUNT POSITION SHDN PIN EV KIT FUNCTION 1-2 Connected to VCC MAX9814 enabled 2-3 Connected to GND MAX9814 disabled — Not connected SHDN driven by external controller Gain Control The MAX9814 maximum signal gain can be configured to 40dB, 50dB, or 60dB. Jumper JU2 selects the overall gain for the MAX9814 EV kit. See Table 2 for jumper JU2 gain control configurations. Table 2.
PAGE 4
Evaluates: MAX9814 MAX9814 Evaluation Kit 1 JU6 JU4 JU5 C2 0.1µF C1 0.22µF CT C4 0.022µF TH C3 0.047µF R1 150kΩ 1% 14 TH R2 100kΩ 1% U1 MAX9814 SHDN VCC 1 2 JU1 3 MICBIAS 2 3 C5 2.2µF VCC 4 5 VCC SHDN CG N.C. 12 11 VCC VCC GAIN MIC_OUT 10 A/R MICOUT C7 0.1µF C9 0.1µF MICIN 7 GND R3 2.21kΩ 1% JU2 2 VCC JU3 2 1 9 2 SGND_OUT 1 3 6 1 J1 C8 0.47µF N.C. C6 1µF GND BIAS 13 3 8 2 1 J2 Figure 1.
PAGE 5
MAX9814 Evaluation Kit Figure 3. MAX9814 EV Kit PCB—Component Guide Figure 4. MAX9814 EV Kit PCB—Solder Side 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.