ISD-DEMO8101 - Digi-Key
Contents
1. C2 C1 1uF Cbulk C1 value range 10uF to 100uF 100uf is preferred MA c9 0 1 uF 4 7uE L External Controller Enabled Vss ISD8101 P Figure 5 DIFFERENTIAL INPUT DESIGN CONTROLLED BY CHIP EN ABLE CASE Vdd R1 50k Rb C C2 C1 0 1uF Cbulk C1 value range 10uF to 100uF 100uf is preferred MA V gt 1 1V C10 Vss aia ISD8101 gt 1 3 Figure 6 DIFFERENTIAL INPUT DESIGN ALWAYS ON CASE CHIP ENABLE TIED TO Vdd Sept 2010 Rev 1 0 Page 6 8 NUVOTON _QQrGrG EVB Schematic PWR jumper a a a a E E E E mi 9 m2 9 Pwrit pwr VOD pol R11 VDD2 p of d 2 0 ohm C1 C2 C3 NS C4 NS 100uF 0 1uF 33pF 1 10pF VSSI pol d l l VSS2 pol L DCN1 ol DCN2 ol ACN1 R8 R12 NS 1 bi a UNV vy R ia R ACN2 dlie Tre C12 NS al d 6 VDD LPN1 R1 R2 6 R3 ol A d 4 50k 1 0 ohm F 0 ohm LPN2 c11 NS ltz ol 22pF a E VREFO JSE R14 NS C8 NS A jumper R7 NS C5 NS d A R Cc R C9 C14 NS O JSE1 LPP1 4 7uF 22pF a Sil MA tr E dl i O JSE2 LPP2 R4 R5 G7 R6 ol l 5 y OND 50k 1 0 ohm tuF 0 ohm C13 NS Te ACP1 C15 NS ol 22pF f i pe ME A A ACP2 R9 NS PY el J tINP Ai R el R13 NS R JON1 JON2 vDD a ae d lo tp TP ol lo tp jumper JON DCP2. 2 jumper El JCE1 a JCE2 oo CE R10 F tCE ol al lo tp 2 2k C10 NS d Sept 2010 Rev 1 0 Page 7 8 nUVOTON ESS _ lt lt lt lt a VERSION HISTORY Rev 1 0 Sept 30 2010 all Initial Release Important Notice Nuvoton products are not designed intended authorized or warranted for use as components in systems or equipment intended for surgical implantation atomic energy control instruments airplane or spaceship instruments transportation instruments traffic signal instruments combustion control instruments or for other applications intended to support or sustain life Furthermore Nuvoton products are not intended for applications wherein failure of Nuvoton products could result or lead to a situation wherein personal injury death or severe property or environmental damage could occur Nuvoton customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Nuvoton for any damages resulting from such improper use or sales Sept 2010 Rev 1 0 Page 8 8
3. NUVOTON O K K K K lt X XAXA ISD DEMO8101 User s Manual The ISD DEMO8101 is a SOP8 demo board for ISD8101 series It is available to demonstrate basic functionality and to make it easy to try different configurations of components and component values In the standard configuration there are no pins on any of the input output pads on the PCB and may be either soldered with wires or jumper pins As a fast way to test it is found that the larger size E Z Hook style clip lead probe wires can attach easily to the holes around the outside edge of the PCB The picture below illustrates all the input controls and BTL speaker output Power Speaker Figure 1 ISD DEMO8101EVB Pins and Jumpers Definition Sept 2010 Rev 1 0 Page 1 8 NUVOTON JCE JSE i i Audio Signal jumper jumper Gan 8 ohm loudspeaker Figure 2 ISD DEMO8101EVB Possible Connections Hardware Connections e Connect an 80 or larger loading speaker to SPP and SPN e Connect a power supply to the related terminals Please ensure the polarity of the power is correct to avoid any damages to the ISD8101 device e Connect CE either to VDD or Ground and CE is active High e Unity gain set of inputs LPN and LPP are configured for low gain configurations In the single ended use scenario the signal may be applied only to the LPN input e A 20dB gain set of inputs ACN and ACP are config
4. d by Chip Enable Differential inputs are used and are best such as when filtering a PWM Pulse Width Modulated signal and handling other difficult signal input design requirements An external controller manages Chip Enable Connect jumper JCE and then CE depends on the CE point control voltage Thus an external CE control voltage should be used to control the device Connect power supply to VDD and ground to VSS Connect 84 or larger load speaker to SPP and SPN Insert the input audio signal to either Unity Gain Differential Inputs LPN and LPP OdB gain configuration or High Gain Differential Inputs ACN and ACP 20dB gain configuration Figure 6 Differential Input Design Always On Case Chip Enable tied to Vdd Differential inputs are used and are best such as when filtering a PWM Pulse Width Modulated signal and handling other difficult signal input design requirements No external controller is available to manage the Chip Enable CE pin The device is enabled at all times by connection of the Chip Enable CE pin directly to Vdd Sept 2010 Connect jumper JON and thus CE is always ON Connect power supply to VDD and ground to VSS Connect 84 or larger load speaker to SPP and SPN Insert the input audio signal to either Unity Gain Differential Inputs LPN and LPP OdB gain configuration or High Gain Differential Inputs ACN and ACP 20dB gain configuration Rev 1 0 Page 5 8 NUVOTON Vdd d 0
5. ured for high gain configurations In the single ended use scenario the signal should be applied only to the ACN input e Another set of high gain inputs DCN and DCP that have the same gain as for ACN and ACP but that are DC coupled to the device input e Jumper JON install to cause the amplifier to be always on since CE is shorted to VDD e Jumper JCE Connect the chip enable input to the CE connection point on the PCB This is must be installed if an external CE control voltage will be used to control the device e Jumper JSE Connect if the device is used in the single ended configuration Sept 2010 Rev 1 0 Page 2 8 NUVOTON Gr Operations Standalone Operations Below are four common ways that parts such as the ISD8101 are used in audio circuits To use this user guide it is best to first identify which of these configurations most closely matches the desired application scenario Best performance is always achieved by using the differential configuration and when this can be used difficult noise pop click issues can be most reduced Figure 3 Single Ended Design Controlled by Chip Enable Lowest parts count using just one input and an external controller manages the Chip Enable CE pin for best performance Connect jumper JCE and then CE depends on the CE point control voltage Thus an external CE control voltage should be used to control the device Connect jumper JSE for single ended input Connect power suppl
6. y to VDD and ground to VSS Connect 8Q or larger load speaker to SPP and SPN Insert the input audio signal to either Unity Gain Input LPN 0dB gain configuration or High Gain Input ACN 200B gain configuration Figure 4 Single Ended Design Always On Case Chip Enable tied to Vdd Lowest parts count using just one input but no external controller is available to manage the Chip Enable CE pin The device is always enabled by connection of the Chip Enable pin directly to Vdd Sept 2010 Connect jumper JON and thus CE is always ON Connect jumper JSE for single ended input Connect power supply to VDD and ground to VSS Connect 84 or larger load speaker to SPP and SPN Insert the input audio signal to either Unity Gain Input LPN OdB gain configuration or High Gain Input ACN 200B gain configuration Rev 1 0 Page 3 8 NUVOTON Application Schematic Vdd C2 Ci 0 tuF TT Cbulk C1 value range 10uF to 100uF 100uf is preferred Vin C6 0 01uF 1uF Bias Generator External Controller Vdd ia Vdd C1 Vin 0 1 Cbulk O 50k C1 value range E 10uF to 100uF C6 100uf is preferred co 6 0 1uf 4 7uF R10 cio V gt 11V 7 Enabled Vss I ISD8101 0 Figure 4 SINGLE ENDED DESIGN ALWAYS ON CASE CHIP ENABLE TIED TO Vdd Sept 2010 Rev 1 0 Page 4 8 NUVOTON Qtr Figure 5 Differential Input Design Controlle
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