19-2904; Rev 0; 7/03 MAX4063 Evaluation Kit Features ♦ 2.4V to 5.5V Single-Supply Operation ♦ High 95dB PSRR ♦ Low-Noise Integrated Microphone Bias ♦ Single-Ended and Differential Inputs ♦ Differential Output ♦ Externally Adjustable Gain ♦ 0.3µA Shutdown Current ♦ Small 14-Pin TSSOP Package ♦ Fully Assembled and Tested Ordering Information PART TEMP RANGE IC PACKAGE MAX4063EVKIT 0°C to +70°C 14 TSSOP Component List DESIGNATION QTY C1 1 C2, C3, C4 C5, C6 C7, C8 C9 3 2 2 1 DESCRIPTION 0.1µF ±10%, 16V X7R ceramic capacitor (0603) Taiyo Yuden EMK107BJ104KA 10µF ±10%, 10V tantalum capacitors (Case A) AVX TAJA106K010R 1.0µF ±10%, 6.3V X5R ceramic capacitors (0603) Taiyo Yuden JMK107BJ105KA 1.0µF ±10%, 16V tantalum capacitors (Case A) AVX TAJA105K016R 10pF ±5%, 50V C0G ceramic capacitor (0603) TDK C1608C0G1H100J DESIGNATION QTY DESCRIPTION J1 1 3.5mm stereo jack J2 1 Nonswitched PC mount jack, red R1, R6 2 2kΩ ±1% resistors (0805) R2 1 4.75kΩ ±1% resistor (0805) R3 1 18.2kΩ ±1% resistor (0805) R4, R5, R7, R9, R10 5 100kΩ ±5% resistors (0805) R8, R11 0 Not installed resistors (0805) JU1, JU2, JU3 3 2-pin headers JU4, JU5 2 3-pin headers U1 1 MAX4063EUD (14-pin TSSOP) None 3 Shunts (JU1, JU4, JU5) None 1 MAX4063 PC board Component List PHONE FAX AVX SUPPLIER 843-946-0238 843-626-3123 www.avxcorp.com WEBSITE Taiyo Yuden 800-348-2496 847-925-0899 www.t-yuden.com TDK 847-803-6100 847-390-4405 www.component.tdk.com Note: Please indicate that you are using the MAX4063 when contacting these component suppliers. ________________________________________________________________ Maxim Integrated Products 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. 1 Evaluates: MAX4063 General Description The MAX4063 evaluation kit (EV kit) is a fully assembled and tested circuit board that uses the MAX4063 lownoise microphone amplifier IC designed for a single 2.4V to 5.5V application. The MAX4063 IC contains two microphone amplifiers. The main amplifier is typically used to sense an internal (built-in) system microphone, and an auxiliary amplifier that can be used to sense an external (plug-in) microphone. The differential and single-ended gains of the amplifiers are adjustable with jumpers and resistors. The differential output allows the EV kit to drive a load at up to 6VP-P. The EV kit also features low quiescent current and a shutdown control to minimize power consumption. The EV kit demonstrates how the MAX4063 can provide a complete microphone solution for a notebook PC. The MAX4063 is available in 14-pin TSSOP and 16-pin QFN (4mm x 4mm x 0.8mm) packages. Evaluates: MAX4063 MAX4063 Evaluation Kit Quick Start The MAX4063 EV kit is fully assembled and tested. Follow the steps listed below to verify board operation. Do not turn on the power supply until all connections are completed. RING TIP (AUXIN) (BIAS) SLEEVE (GND) Recommended Equipment • 5V power supply • AC source – 100mVAC, 1kHz sine wave • Oscilloscope Figure 1. Typical Microphone Jack Procedures 1) Install a shunt across pins 1 and 2 of jumper JU4 (EV kit ON). Detailed Description 2) Install a shunt across pins 1 and 2 of jumper JU5 (INT mode). The MAX4063 microphone preamplifier features two selectable inputs, differential outputs, adjustable gain, an integrated low-noise bias source, and a low-power shutdown mode. Two input paths provide both differential and single-ended microphone sensing. The high noise rejection of the differential input is ideally suited to an internal microphone where system noise and long-run PC board traces can degrade low-level signals. The single-ended input provides a simple connection to an external microphone. 3) Install a shunt across jumper JU1 (20dB gain). 4) Connect channel 1 of the oscilloscope to the OUT pad, and channel 2 of the oscilloscope to the OUT pad. Connect the oscilloscope ground leads to the EV kit GND connection. 5) Connect the 5V terminal of the power supply to the VCC pad and the ground terminal of the power supply to the GND pad. Turn on the power supply. 6) Connect the 100mV, 1kHz AC source sine wave across the IN+ and IN- pads. 7) Verify that the output across the OUT and OUT pads is a 1VAC, 1kHz sine wave. 8) Remove the shunt from pins 1 and 2 of JU5 and install the shunt across pins 2 and 3 of JU5 (AUX mode). 9) Connect the 100mV, 1kHz AC source sine wave across the AUXIN jack (see Figure 1). 10) Verify that the output across the OUT and OUT pads is a 2VAC, 1kHz sine wave. 2 The differential and single-ended inputs have independent, adjustable gains. The Differential Gain Setting on the EV kit is controlled by jumpers JU1, JU2, and JU3 to select from three preset gains (20dB, 40dB, and 60dB); see Table 1. The single-ended (AUX) gain is set to the default 26dB. This can by changed by adding resistor R8: R8 = 2MΩ/(AVAUX - 26) V − V OUT AVAUX = 20LOG OUT VAUX _ IN and AVAUX must be greater than 26dB. When R8 is opened, the gain AVAUX is 26dB. Differential outputs provide a full-scale signal of up to 6VP-P from a single 3V, supply optimizing the dynamic range of the amplified signal. The EV kit operates from a single 2.4V to 5.5V supply. _______________________________________________________________________________________ MAX4063 Evaluation Kit Table 1. JU1, JU2, JU3 Jumper Selection Table 3. JU5 Jumper Selection JUMPER SHUNT POSITION DIFFERENTIAL GAIN (dB) JU1 Installed (JU2 and JU3 open) +20 JU2 Installed (JU1 and JU3 open) +30 JU3 Installed (JU1 and JU2 open) +40 JU1, JU2, JU3 None +6 SHUNT POSITION INT/AUX PIN EV KIT INPUT MODE 1–2 (INT) Pulled down to GND Differential 2–3 (AUX) Pulled up to VCC Single ended None. External controller connected to (INT/AUX) pad. External controller controls (INT/AUX) driven by external source Shutdown Jumper JU4 controls the shutdown pin (SHDN) on the MAX4063 IC. The shutdown function may be activated on the EV kit by installing a shunt across pins 2 and 3 of JU4. The shutdown function may also be controlled by an external controller connected to the SHDN pad and removing the shunt on JU4. See Table 2 for shunt positions. Table 2. JU4 Jumper Selection SHUNT POSITION SHDN PIN EV KIT FUNCTION 1–2 (SHDN = high) Pulled up to VCC EV kit ON. 2–3 (SHDN = low) Pulled down to GND EV kit OFF. None. External controller connected to SHDN pad. External controller controls SHDN driven by external source. Shutdown is active low. _______________________________________________________________________________________ 3 Evaluates: MAX4063 Differential Gain JU1, JU2, and JU3 select the differential gain for the MAX4063 EV kit. JU1, JU2, and JU3 should all be left open or installed one at a time. See Table 1 for shunt positions. Input Mode Jumper JU5 provides an option to select between single-ended mode (AUX) and differential mode (INT) inputs. The input mode (INT/AUX) may also be controlled by an external controller connected to the (INT/AUX) pad and removing the shunt on JU5. See Table 3 for shunt positions. Jumper Selection Evaluates: MAX4063 MAX4063 Evaluation Kit R2 4.75kΩ 1% JU1 40dB R1 2kΩ 1% C3 10µF 10V IN+ GND 10 13 R11 OPEN 5 R6 2kΩ 1% 2 6 VCC VCC 3 JU4 IN- U1 OUT C9 10pF SHDN C7 1.0µF 16V OUT 8 N.C. BIAS OUT OUT 4 C8 R10 1.0µF 16V 100kΩ AUX_IN INT/AUX 2 ADJ GND JU5 3 2 1 R8 OPEN 7 11 Figure 2. MAX4063 EV Kit Schematic 4 GND R9 100kΩ MAX4063 C5 1.0µF 12 GND 1 2 3 C6 1.0µF R7 100kΩ C2 10µF 10V C1 0.1µF IN+ C4 10µF 10V 3 1 JU3 20dB SHDN R5 100kΩ J1 14 G1 R4 100kΩ IN- BIAS JU2 30dB VCC 1 G2 9 R3 18.2kΩ 1% _______________________________________________________________________________________ 2 1 INT/AUX J2 MAX4063 Evaluation Kit Evaluates: MAX4063 Figure 3. MAX4063 EV Kit Component Placement Guide— Component Side Figure 4. MAX4063 EV Kit PC Board Layout—Component Side Figure 5. MAX4063 EV Kit PC Board Layout—Solder Side Figure 6. MAX4063 EV Kit Component Placement Guide— 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.