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Part: MAX4338EVKIT
Category:
Analog & Mixed-Signal Processing
Description: MAX4338EVKIT Evaluation Kit For The MAX4338/MAX4233
Company: Maxim Integrated Products
Datasheet: Download MAX4338EVKIT datasheet File size : 399 kB
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Datasheet text preview:
19-2276; Rev 0; 1/02
MAX4338 Evaluation Kit
General Description
The MAX4338 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that evaluates the MAX4338 audio amplifier. The MAX4338 EV kit is designed to be driven by the lineout of a CD player or d i r e c t l y connected to any stereo audio source. The MAX4338 EV kit includes RCA jacks on the input and a 3.5mm headphone jack on the output to facilitate easy connections to the circuit board. This MAX4338 EV kit can also be used to evaluate the MAX4233 high-output-drive, Rail-to-Rail® op amp.
Features
o Capable of Driving a Stereo 32 Load (POUT = 60mW, VCC = 5V, THD + N = 1%, RL = 32, fIN = 1kHz) (POUT = 20mW, VCC = 3V, THD + N = 1%, RL = 32, fIN = 1kHz) o Single-Supply Operation o Low 0.1% THD + N (20Hz to 20kHz) (VCC = 5V, POUT = 40mW, RL = 32) (VCC = 3V, POUT = 17mW, RL = 32) o Low-Profile Design (2.0mm, max) o Fully Assembled and Tested Surface-Mount Board o On-Board Shutdowns
Evaluates: MAX4338/MAX4233
Ordering Information
PART MAX4338EVKIT TEMP RANGE 0°C to +70°C IC PACKAGE 10 µMAX
Note: To evaluate the MAX4233, request a MAX4233AUB free sample with the MAX4338EVKIT.
Component List
DESIGNATION C1, C3 QTY 2 DESCRIPTION 100pF ±10%, 10V ceramic capacitors (0402) TDK C1005C0G1H101K Through-hole capacitors (not installed) 0.47µF ±10%, 20V tantalum capacitors (R-case) AVX TAJR474M020R 1µF ±10%, 10V X5R ceramic capacitor (0603) TDK C1608X5R1A104K 0.1µF ±10%, 10V X5R ceramic capacitor (0402) TDK C1005X5R1A104K 220µF ±10%, 10V tantalum capacitors (Y-case) AVX TPSY227M010R0200 or Sprague 592D227X0010V2T DESIGNATION J1 J2 J3 C5, C6 2 JU1JU5 R1, R2 R3, R4, R5, R6 R7, R8 C8 1 U1 None None None QTY 1 1 1 5 2 6 2 2 1 5 1 1 DESCRIPTION Phono jack (side-entry PC board mount) red Phono jack (side-entry PC board mount) white Stereo headphone jack (3.5mm dia.) 2-pin headers 22.1k ±1% resistors (0603) 100k ±5% resistors (0603) 47.5k ±1% resistors (0603) Through-hole resistors (not installed) MAX4338EUB (10-pin µMAX) Shunts MAX4338 EV kit PC board MAX4335MAX4338 data sheet
C2, C4
2
C7
1
C9, C10, C11
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Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. ________________________________________________________________ Maxim Integrated Products 1
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.
MAX4338 Evaluation Kit Evaluates: MAX4338/MAX4233
Component Suppliers
SUPPLIER AVX Sprague TDK PHONE 843-946-0238 402-563-6866 847-803-6100 FAX 843-626-3123 402-563-6296 847-390-4405 WEBSITE www.avxcorp.com www.vishay.com www.component.tdk.com
Note: Please indicate that you are using the MAX4338 when contacting these component suppliers.
Quick Start
Required Equipment: · One pair of 32 headphones · · One variable DC power supply capable of supplying between 2.7V and 5V at 200mA One stereo audio source
Detailed Description
The MAX4338 EV kit is a stereo, single-supply audio amplifier. The MAX4338 EV kit is designed to be driven by the stereo lineout of a CD player or directly connected to any stereo audio source. The input impedance is 22.1k. The -3dB corner frequencies are approximately 30Hz and 34kHz with a 32 load. The MAX4338 EV kit h a s a gain of approximately 2.1. An input signal of 700mVRMS, while using a 5V supply, produces a fullr a n g e output with a 32 l o a d . An input signal of 400mVRMS, while using a 3V supply, produces a fullrange output with a 32 load.
The MAX4338 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Do not turn on the power supply until all connections are completed: 1) Plug the headphones into the 3.5mm headphone jack. 2) Ensure that the audio source is turned off. 3) C o n n e c t the disabled audio source through the RCA phono jacks. 4) Ensure that the shunts JU1JU5 are not installed. 5) Connect the 2.7V to 5V DC power supply to the VCC and GND pads. 6) Turn on the 2.7V to 5V DC power supply. 7) Turn on the audio source.
Shutdown Control
The MAX4338 EV kit provides two SHDN pins to disable the left and right outputs independently. Jumpers JU1 and JU2 control the left and right channels. Jumper JU3 connects both the left channel and right channel SHDN pins together so that both channels can be shut down simultaneously. Table 1 lists the options available f o r shutdown control. An external controller can be used by removing the shunts on JU1, JU2, JU3 and connecting the external controller to the pads labeled S H D N 1 a n d SHDN2. SHDN1 a n d SHDN2 a r e TTL/CMOS logic-level inputs.
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MAX4338 Evaluation Kit Evaluates: MAX4338/MAX4233
Table 1. Shutdown Selection
JU1 Not Installed Installed Not Installed Installed Installed Not Installed JUMPER JU2 Not Installed Not Installed Installed Installed Not Installed Installed Installed JU3 Don't Care Not Installed Not Installed Don't Care Left and right channels disabled DESCRIPTION Left and right channels enabled Right channel disabled Left channel disabled
Table 2. DC-Blocking Capacitor Jumpers
JUMPER JU4 JU5 SHUNT POSITION Installed Not Installed Installed Not Installed FUNCTION C9 removed from circuit C9 remains in circuit C10 removed from circuit C10 remains in circuit
Output Capacitor Jumper Selection
Jumpers JU4 and JU5 removes the output DC-blocking capacitors (C9 and C10) from the circuit. This allows t h e user to drive a pure resistive load if desired. Inserting JU4 or JU5 produces an output on the corres p o n d i n g channel with a DC component equal to midrail (VCC/2) and changes the -3dB highpass corner frequency of 30Hz (see Table 2 for shunt positions).
Shutdown Current Measurements
The MAX4338 EV kit has active-low shutdowns and uses pullup resistors (R9 and R10) to activate these s h u t d o w n s . Any shutdown current measurements s h o u l d take into account the current being drawn t h r o u g h R9 and R10, as well as the current drawn through the bias resistors R3 and R4. This current can be calculated using the following equations (assumes both shutdowns are active): ISUPPLY = IRES + IMAX4338 IRES = VCC V VCC + CC + R9 R10 R 3 + R4
Through-Hole Components
The MAX4338 EV kit also provides pads for the user to solder up to two through-hole components per channel onto the PC board (R7, C2 and R8, C4). This allows the user access to test the op amps capacitive- and resistive-load driving capabilities, without having to access the output of the op amp through the headphone jack.
T h e maximum shutdown current of the MAX4338 is 0.5µA.
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