MAX9789AEVKIT+

19-0591; Rev 1; 11/06 MAX9789A Evaluation Kit The MAX9789A evaluation kit (EV kit) is a fully assembled and tested circuit board that evaluates the MAX9789A IC. The MAX9789A combines a stereo 2W Class AB speaker power amplifier, a stereo 85mW DirectDrive™ headphone amplifier, and a 120mA lowdropout (LDO) linear regulator in a single device. The MAX9789A is designed for use with the Windows Vista™ operating system and is fully compliant with Microsoft’s premium mobile Vista specifications. The speaker amplifier operates from a 4.5V to 5.5V DC power supply and delivers 2 x 2W output power into a pair of 4Ω speakers. The headphone amplifier operates from a 3.0V to 5.5V DC power supply and delivers 100mW output power into a 16Ω stereo headphone. The MAX9789A provides separate stereo speaker and headphone amplifier inputs. Control pins provide independent shutdown of the speaker and headphone amplifiers, allowing speaker and headphone amplifiers to reproduce separate audio streams simultaneously. The MAX9789A features an internal 120mA LDO. The LDO output voltage is internally set at 4.75V, or can be externally adjusted between 1.21V and 4.75V using a simple resistor-divider. The LDO can be enabled independently of the audio amplifiers. The MAX9789A EV kit can be used to evaluate the MAX9790A. See the Evaluating the MAX9790A section for more details. Features ♦ Windows Premium Mobile Vista Compliant ♦ 2W Stereo Class AB BTL Speaker Amplifier ♦ Stereo 100mW DirectDrive Headphone Amplifier ♦ Integrated 120mA Low-Dropout Linear Regulator ♦ Fully Assembled and Tested ♦ Evaluates the MAX9790A (Replacement IC Required) Ordering Information PART TEMP RANGE IC PACKAGE MAX9789AEVKIT+ 0°C to +70°C* 32 TQFN-EP** *This limited temperature range is for the EV kit PC board only. The MAX9789A IC temperature range is -40°C to +85°C. **EP = Exposed paddle. +Denotes a lead-free and RoHS-compliant EV kit. Windows Vista is a trademark of Microsoft Corp. Component List DESIGNATION QTY DESCRIPTION REQUIRED COMPONENTS C1, C2, C3, C9, C11–C14 C4 C5, C6 8 1.0µF ±10%, 6.3V X5R ceramic capacitors (0402) TDK C1005X5R0J105K 1 10µF ±20%, 6.3V X5R ceramic capacitor (0805) TDK C2012X5R0J106M 2 1.0µF ±10%, 10V X7R ceramic capacitors (0603) TDK C1608X7R1A105K 2 1.0µF ±10%, 25V X7R ceramic capacitors (1206) TDK C3216X7R1E105K C10, C15, C17 3 0.1µF ±10%, 10V X5R ceramic capacitors (0402) TDK C1005X5R1A104K C16*, C18* 2 33µF ±20%, 6.3V X5R ceramic capacitors (1206) TDK C3216X5R0J336M C7, C8 DESIGNATION QTY DESCRIPTION U1 1 MAX9789AETJ+ (32-pin TQFN, 5mm x 5mm x 0.8mm) — 1 MAX9789A EV kit PCB OPTIONAL COMPONENTS C19 1 Not installed, ceramic capacitor (0402) J1–J4, J6, J7, J8 7 3-pin headers J5 1 2-pin header J9 1 3.5mm stereo jack R1 1 47kΩ ±1% resistor (0402) R2 1 27kΩ ±1% resistor (0402) — 8 Shunts *System-level requirement. +Denotes lead-free package. ________________________________________________________________ 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: MAX9789A/MAX9790A General Description Evaluates: MAX9789A/MAX9790A MAX9789A Evaluation Kit Quick Start Recommended Equipment • One 5V, 2A power supply • Two audio sources • Stereo speakers 13) Connect the second audio source to the HP_INL and the HP_INR pads. Connect the audio source ground to the SGND pad. 14) Turn on the power supply and both audio sources. Detailed Description • One stereo headphone The MAX9789A 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. 1) Verify that a shunt is installed across pins 1 and 2 of jumper J1 (LDO_EN = VDD, LDO enabled). 2) Verify that a shunt is installed across pins 2 and 3 of jumper J2 (LDO_SET = GND, LDO_OUT = 4.75V). 3) Verify that shunts are installed across pins 1 and 2 of jumper J3 and pins 2 and 3 of jumper J4 (GAIN2 = VDD, GAIN1 = GND, SPKR gain = 10dB). 4) Verify that a shunt is installed across jumper J5 (HPVDD = VDD). 5) Verify that a shunt is installed across pins 1 and 2 of jumper J6 (MUTE = VDD, MUTE disabled). 6) Verify that a shunt is installed across pins 2 and 3 of jumper J7 (SPKR_EN = GND, SPKR enabled). 7) Verify that a shunt is installed across pins 1 and 2 of jumper J8 (HP_EN = VDD, enabled). 8) Connect the first speaker to the OUTL+ and the OUTL- pads. 9) Connect the second speaker to the OUTR+ and the OUTR- pads. 10) Insert a pair of headphones to jack J9. 11) Connect the ground terminal of the power supply to the GND pad. Connect the +5V power supply to the VDD pad. 12) Connect the first audio source to the SPKR_INL and the SPKR_INR pads. Connect the audio source ground to the SGND pad. The MAX9789A EV kit is designed to evaluate the MAX9789A IC. The MAX9789A combines a stereo 2W Class AB speaker power amplifier, a stereo 100mW DirectDrive headphone amplifier, and a 120mA lowdropout linear regulator in a single device. The MAX9789A is designed for use with the Windows Vista operating system and is fully compliant with Microsoft’s premium mobile Vista specifications. The speaker amplifier operates from a 4.5V to 5.5V DC power supply and delivers 2 x 2W output power into a pair of 4Ω speakers from an independent input port. The headphone amplifier operates from a 3.0V to 5.5V DC power supply and delivers 100mW power into 16Ω stereo headphones from an independent input port. The EV kit can be powered by a single 4.5V to 5.5V DC power supply if desired. The MAX9789A provides separate stereo speaker and headphone amplifier inputs. Control pins provide independent shutdown of the speaker and headphone amplifiers, allowing speaker and headphone amplifiers to reproduce separate audio streams simultaneously. The speaker amplifier gain of the MAX9789A is selectable by jumpers J3 and J4. The MAX9789A also features a 120mA, fixed 4.75V or adjustable 1.21V to 4.75V, low-dropout linear regulator. The EV kit is shipped with the MAX9789AETJ+ installed. The EV kit can also evaluate the MAX9790A. To evaluate the MAX9790A, see the Evaluating the MAX9790A section for additional information. Component Supplier SUPPLIER TDK PHONE FAX 847-803-6100 847-390-4405 WEBSITE www.component.tdk.com Note: Indicate that you are using the MAX9789A/MAX9790A when contacting this component supplier. 2 _______________________________________________________________________________________ MAX9789A Evaluation Kit Shutdown Control (J1, J7, and J8) Jumpers J7 and J8 control the independent shutdown pins (SPKR_EN and HP_EN, respectively) of the speaker and headphone amplifiers. See Table 1 for shunt positions. Table 1. J7 and J8 Jumper Selection EV KIT FUNCTION J7 SHUNT POSITION J8 SHUNT POSITION 1-2 2-3 Disabled Disabled 1-2 1-2 Disabled Enabled 2-3 2-3 Enabled Disabled 2-3* 1-2* Enabled Enabled SPKR HP Gain Control (J3 and J4) Jumpers J3 and J4 set the speaker amplifier gain on the EV kit. See Table 4 for shunt positions. Table 4. J3 and J4 Jumper Selection J3 SHUNT POSITION J4 SHUNT POSITION SPEAKER AMPLIFIER GAIN (dB) HEADPHONE AMPLIFIER GAIN** (dB) 2-3 2-3 6 3.5 2-3* 1-2* 10 3.5 1-2 2-3 15.6 3.5 1-2 1-2 21.6 3.5 *Default setting. **Headphone amplifier gain is fixed at 3.5dB. Power-Supply Control (J5) *Default setting. Jumper J1 enables/disables the linear regulator. See Table 2 for shunt positions. Table 2. J1 Jumper Selection J1 SHUNT POSITION 1-2* EV KIT FUNCTION Table 5. J5 Jumper Selection J5 SHUNT POSITION Installed* LDO enabled 2-3 LDO disabled *Default setting. Not installed EV KIT FUNCTION VDD = HPVDD Provide a separate, external 3.0V to 5.5V potential between HPVDD and GND *Default setting. Mute Control (J6) Jumper J6 controls the mute pin (MUTE) of the speaker and headphone amplifiers. See Table 3 for shunt positions. Table 3. J6 Jumper Selection J6 SHUNT POSITION Low-Dropout Linear Regulator (J1 and J2) Jumper J1 enables/disables the linear regulator. See Table 6 for shunt positions. Jumper J2 connects the regulator’s feedback input (LDO_SET) to either GND or the resistor-divider R1/R2. EV KIT FUNCTION 1-2* SPKR and HP unmuted 2-3 SPKR and HP muted *Default setting. Jumper J5 connects VDD to HPVDD. See Table 5 for shunt positions. Table 6. J1 Jumper Selection J1 SHUNT POSITION EV KIT FUNCTION 1-2* LDO enabled 2-3 LDO disabled *Default setting. _______________________________________________________________________________________ 3 Evaluates: MAX9789A/MAX9790A Jumper Selection Evaluates: MAX9789A/MAX9790A MAX9789A Evaluation Kit Table 7. J2 Jumper Selection J2 SHUNT POSITION 1-2 2-3* EV KIT FUNCTION The regulator’s feedback input (LDO_SET) is connected to resistor-divider R1/R2. Note: The resistors installed on the EV kit set the output voltage to 3.3V. The regulator’s feedback input (LDO_SET) is connected to GND. The output voltage is 4.75V. *Default setting. capacitance, and the wiring capacitance. This capacitor creates a zero in the feedback loop to reduce overshoot. Select C19 in the 10pF range when R1 is greater than 100kΩ. Overcompensation can cause poor stability in the high output current range. Evaluating the MAX9790A LDO_OUT R1 47kΩ MAX9789A See Table 7 for shunt positions. The resistors installed on the MAX9789A EV kit set the output voltage to 3.3V. To change this voltage, replace R1 and R2. Use the following equation to select resistor values: TO CODEC C19 OPEN C11 1µF C12 1µF LDO_SET R2 27kΩ GND ⎛ R1 ⎞ VLDO _ OUT = VLDO _ SET ⎜1 + ⎟ ⎝ R2 ⎠ Figure 1. Adjustable Output Using External Feedback Resistors where VLDO_SET = 1.21V. To simplify resistor selection: ⎛ VLDO _ OUT ⎞ R1 = R2 ⎜ − 1⎟ 1.21 ⎝ ⎠ To minimize the current consumption, select resistor values between 10kΩ and 1MΩ. Capacitor C19 (see Figure 1) can be used to compensate the input capacitance at LDO_SET, the stray 4 The MAX9790A combines a stereo 2W Class AB speaker power amplifier with a stereo 100mW DirectDrive headphone amplifier only. To evaluate the MAX9790A, replace the MAX9789A with the MAX9790A. Ensure a shunt is installed across pins 2 and 3 of jumper J1 before operating the device. Do not install a shunt at jumper J2. Follow the MAX9789A quick start instructions with the exception of steps 1 and 2. _______________________________________________________________________________________ MAX9789A Evaluation Kit Evaluates: MAX9789A/MAX9790A VDD GND C18 33µF CPGND PGND C17 0.1µF 18 PVDD 3 PGND 8 PGND PVDD SPKR_INL OUTL+ C5 1.0µF SPKR_INR 2 24 C9 1.0µF HP_INL C8 1.0µF HP_INR C7 1.0µF C16 33µF PGND PGND C6 1.0µF SPKR_INL C15 0.1µF OUTL- 26 BIAS HP_INL OUTR- VDD SPKR_EN 1 2 3 1 2 3 25 23 J7 VDD 1 2 3 SPKR_EN HPR 22 J8 32 HP_EN GAIN2 VDD 1 2 3 J4 31 HPVDD GAIN1 CPVDD 4 J1 J5 17 C4 10µF 9 C3 1µF LDO_EN CPGND C1P 30 C11 1.0µF CPGND 11 C1 1.0µF CPGND 29 LDO_OUT C1N 12 CPGND C13 1.0µF C14 1.0µF EP R1 47kΩ 1% 1 LDO_SET GND R2 27kΩ 1% 10 VDD C10 0.1µF LDO_OUT C19 OPEN 15 VDD VDD C12 1.0µF J9 HPVDD J3 VDD 1 2 3 1 2 3 16 MUTE VDD HP_EN 19 MAX9789A HPL J6 20 HP_INR VDD MUTE 7 SPKR_INR OUTR+ 27 6 1 2 28 J2 PGND 5, 21 PV SS 3 SGND CPV SS 13 14 C2 1.0µF PGND CPGND Figure 2. MAX9789A EV Kit Schematic _______________________________________________________________________________________ 5 Evaluates: MAX9789A/MAX9790A MAX9789A Evaluation Kit VDD GND C18 33µF CPGND PGND C17 0.1µF C15 0.1µF PGND PGND 18 SPKR_INL C6 1.0µF SPKR_INR C5 1.0µF C16 33µF PVDD PGND 8 PGND PVDD 3 SPKR_INL OUTL+ 2 24 C9 1.0µF C8 1.0µF HP_INL 27 OUTL- SPKR_INR OUTR+ 20 HP_INL OUTR- 26 7 BIAS C7 1.0µF HP_INR 6 19 MAX9790A HP_INR VDD MUTE VDD SPKR_EN 1 2 3 1 2 3 J6 25 23 J7 MUTE HPL VDD 1 2 3 HPR 22 J8 J3 32 15 HP_EN HPVDD GAIN2 VDD VDD 1 2 3 1 2 3 J9 SPKR_EN VDD HP_EN 16 1 2 3 VDD J4 31 4 J1 GAIN1 HPVDD CPVDD GND J5 17 C4 10µF 9 C3 1µF CPGND VDD 30 C12 1.0µF C11 1.0µF C1P VDD C10 0.1µF 10 CPGND 11 C1 1.0µF CPGND LDO_OUT 29 C19 OPEN R1 47kΩ 1% R2 27kΩ 1% C1N 1 1 2 N.C. C13 1.0µF C14 1.0µF CPGND EP N.C. GND J2 12 28 PGND 5, 21 PV SS CPVSS 13 14 3 SGND C2 1.0µF PGND CPGND Figure 3. MAX9790A Evaluation Schematic Note: When evaluating the MAX9790A, ensure a shunt is installed across pins 2 and 3 of jumper J1 before operating the device. Do not install a shunt at jumper J2. 6 _______________________________________________________________________________________ MAX9789A Evaluation Kit Figure 5. MAX9789A EV Kit PCB Layout—Component Side Figure 6. MAX9789A EV Kit PCB Layout—Layer 2 Figure 7. MAX9789A EV Kit PCB Layout—Layer 3 _______________________________________________________________________________________ Evaluates: MAX9789A/MAX9790A Figure 4. MAX9789A EV Kit Component Placement Guide— Silkscreen 7 Evaluates: MAX9789A/MAX9790A MAX9789A Evaluation Kit Figure 8. MAX9789A EV Kit PCB Layout—Solder Side Revision History Pages changed at Rev 1: 1, 7, 8 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. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2006 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc. Boblet