300 lines
7.1 KiB
Plaintext
300 lines
7.1 KiB
Plaintext
EESchema Schematic File Version 4
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EELAYER 30 0
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EELAYER END
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$Descr A4 11693 8268
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encoding utf-8
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Sheet 5 6
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Title ""
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Date ""
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Rev ""
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Comp ""
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Comment1 ""
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Comment2 ""
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Comment3 ""
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Comment4 ""
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$EndDescr
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Wire Wire Line
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5350 4250 5250 4250
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Wire Wire Line
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4550 4150 4550 4050
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Wire Wire Line
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7250 3950 7250 4150
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Wire Wire Line
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7550 3650 7550 4150
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Wire Wire Line
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6550 4250 6850 4250
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Text Label 6850 4250 2 70 ~ 0
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GAIN
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$Comp
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L Analog_DAC:AUDIOAMP_MAX98357 U5
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U 1 1 60FE0C5F
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P 5950 3950
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F 0 "U5" H 6150 4600 42 0000 L BNN
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F 1 "MAX98357A" H 5450 3250 42 0000 L BNN
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F 2 "Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm_ThermalVias" H 5950 3950 50 0001 C CNN
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F 3 "" H 5950 3950 50 0001 C CNN
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F 4 "MAX98357AETE+T" H 5950 3950 50 0001 C CNN "MPN"
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F 5 "Maxim IC" H 5950 3950 50 0001 C CNN "Manufacturer"
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F 6 "2949165" H 5950 3950 50 0001 C CNN "ordercode"
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F 7 "farnell" H 5950 3950 50 0001 C CNN "supplier"
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1 5950 3950
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1 0 0 -1
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$EndComp
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Text Notes 5450 3050 0 59 ~ 0
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R1 Channel Selection:\nLEFT = VDD (0 Ohm)\nRIGHT = 370K (94*VDD-100)\nLEFT/2 + RIGHT/2 = 1.011M (222.2*VDD-100)
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Text Notes 6850 3350 0 59 ~ 0
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ToDo: Ferrite (select w/high Z at high F,\nlow Z at low F). Try to block everything\n>1MHz or so.
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Text Notes 6550 4350 0 59 ~ 0
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Gain=9dB
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Text Label 3300 3850 0 70 ~ 0
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GAIN
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$Comp
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L Device:R R27
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U 1 1 60FE0C75
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P 3150 3550
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F 0 "R27" H 3220 3596 50 0000 L CNN
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F 1 "10K" H 3220 3505 50 0000 L CNN
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F 2 "Resistor_SMD:R_0402_1005Metric" V 3080 3550 50 0001 C CNN
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F 3 "~" H 3150 3550 50 0001 C CNN
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F 4 "R10K_0402" H 3150 3550 50 0001 C CNN "StockRef"
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F 5 "2447096" H 3150 3550 50 0001 C CNN "ordercode"
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F 6 "farnell" H 3150 3550 50 0001 C CNN "supplier"
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F 7 "DNP" V 3150 3550 50 0000 C CNN "DNP"
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1 3150 3550
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1 0 0 -1
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$EndComp
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$Comp
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L Device:R R28
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U 1 1 60FE0C7B
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P 3150 4100
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F 0 "R28" H 3220 4146 50 0000 L CNN
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F 1 "10K" H 3220 4055 50 0000 L CNN
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F 2 "Resistor_SMD:R_0402_1005Metric" V 3080 4100 50 0001 C CNN
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F 3 "~" H 3150 4100 50 0001 C CNN
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F 4 "R10K_0402" H 3150 4100 50 0001 C CNN "StockRef"
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F 5 "2447096" H 3150 4100 50 0001 C CNN "ordercode"
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F 6 "farnell" H 3150 4100 50 0001 C CNN "supplier"
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F 7 "DNP" V 3150 4100 50 0000 C CNN "DNP"
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1 3150 4100
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1 0 0 -1
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$EndComp
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Wire Wire Line
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3150 3700 3150 3850
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Wire Wire Line
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3300 3850 3150 3850
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Connection ~ 3150 3850
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Wire Wire Line
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3150 3850 3150 3950
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$Comp
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L power:+3V3 #PWR0149
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U 1 1 60FE0C85
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P 3150 3250
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F 0 "#PWR0149" H 3150 3100 50 0001 C CNN
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F 1 "+3V3" H 3165 3423 50 0000 C CNN
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F 2 "" H 3150 3250 50 0001 C CNN
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F 3 "" H 3150 3250 50 0001 C CNN
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1 3150 3250
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1 0 0 -1
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$EndComp
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Wire Wire Line
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3150 3250 3150 3400
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$Comp
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L power:GND #PWR0150
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U 1 1 60FE0C8C
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P 3150 4400
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F 0 "#PWR0150" H 3150 4150 50 0001 C CNN
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F 1 "GND" H 3155 4227 50 0000 C CNN
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F 2 "" H 3150 4400 50 0001 C CNN
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F 3 "" H 3150 4400 50 0001 C CNN
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1 3150 4400
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1 0 0 -1
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$EndComp
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Wire Wire Line
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3150 4400 3150 4250
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$Comp
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L Device:C C32
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U 1 1 60FE0C93
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P 4550 4500
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F 0 "C32" H 4436 4454 50 0000 R CNN
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F 1 "10nF" H 4436 4545 50 0000 R CNN
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F 2 "Capacitor_SMD:C_0402_1005Metric" H 4588 4350 50 0001 C CNN
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F 3 "~" H 4550 4500 50 0001 C CNN
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F 4 "3013347" H 4550 4500 50 0001 C CNN "ordercode"
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F 5 "farnell" H 4550 4500 50 0001 C CNN "supplier"
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1 4550 4500
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1 0 0 1
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$EndComp
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$Comp
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L Device:C C33
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U 1 1 60FE0C99
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P 4900 4500
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F 0 "C33" H 5015 4546 50 0000 L CNN
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F 1 "100nF" H 5015 4455 50 0000 L CNN
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F 2 "Capacitor_SMD:C_0402_1005Metric" H 4938 4350 50 0001 C CNN
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F 3 "~" H 4900 4500 50 0001 C CNN
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F 4 "2524678" H 4900 4500 50 0001 C CNN "ordercode"
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F 5 "farnell" H 4900 4500 50 0001 C CNN "supplier"
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1 4900 4500
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1 0 0 -1
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$EndComp
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Wire Wire Line
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4550 4150 4900 4150
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Wire Wire Line
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4900 4350 4900 4150
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Wire Wire Line
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4550 4350 4550 4150
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Connection ~ 4550 4150
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$Comp
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L power:GND #PWR0151
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U 1 1 60FE0CA3
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P 4550 4750
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F 0 "#PWR0151" H 4550 4500 50 0001 C CNN
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F 1 "GND" H 4555 4577 50 0000 C CNN
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F 2 "" H 4550 4750 50 0001 C CNN
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F 3 "" H 4550 4750 50 0001 C CNN
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1 4550 4750
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1 0 0 -1
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$EndComp
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$Comp
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L power:GND #PWR0152
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U 1 1 60FE0CA9
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P 4900 4750
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F 0 "#PWR0152" H 4900 4500 50 0001 C CNN
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F 1 "GND" H 4905 4577 50 0000 C CNN
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F 2 "" H 4900 4750 50 0001 C CNN
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F 3 "" H 4900 4750 50 0001 C CNN
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1 4900 4750
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1 0 0 -1
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$EndComp
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Wire Wire Line
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4900 4750 4900 4650
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Wire Wire Line
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4550 4750 4550 4650
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$Comp
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L power:GND #PWR0153
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U 1 1 60FE0CB1
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P 5250 4750
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F 0 "#PWR0153" H 5250 4500 50 0001 C CNN
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F 1 "GND" H 5255 4577 50 0000 C CNN
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F 2 "" H 5250 4750 50 0001 C CNN
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F 3 "" H 5250 4750 50 0001 C CNN
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1 5250 4750
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1 0 0 -1
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$EndComp
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Wire Wire Line
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5250 4250 5250 4350
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Connection ~ 4900 4150
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Wire Wire Line
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4900 4150 5350 4150
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$Comp
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L power:+3V3 #PWR0154
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U 1 1 60FE0CBA
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P 4550 4050
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F 0 "#PWR0154" H 4550 3900 50 0001 C CNN
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F 1 "+3V3" H 4565 4223 50 0000 C CNN
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F 2 "" H 4550 4050 50 0001 C CNN
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F 3 "" H 4550 4050 50 0001 C CNN
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1 4550 4050
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1 0 0 -1
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$EndComp
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Text HLabel 5150 3650 0 50 Input ~ 0
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I2S_SD_MODE
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Text HLabel 5150 3750 0 50 Input ~ 0
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I2S_BCLK
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Text HLabel 5150 3850 0 50 Input ~ 0
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I2S_LRCLK
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Text HLabel 5150 3950 0 50 Input ~ 0
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I2S_DIN
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Wire Wire Line
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5150 3950 5350 3950
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Wire Wire Line
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5350 3850 5150 3850
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Wire Wire Line
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5150 3750 5350 3750
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$Comp
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L Device:C C34
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U 1 1 60FE0CD7
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P 7250 4300
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F 0 "C34" H 7050 4300 50 0000 L CNN
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F 1 "220pF" H 6950 4200 50 0000 L CNN
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F 2 "Capacitor_SMD:C_0402_1005Metric" H 7288 4150 50 0001 C CNN
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F 3 "~" H 7250 4300 50 0001 C CNN
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F 4 "2812289" H 7250 4300 50 0001 C CNN "ordercode"
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F 5 "farnell" H 7250 4300 50 0001 C CNN "supplier"
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1 7250 4300
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1 0 0 -1
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$EndComp
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$Comp
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L Device:C C35
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U 1 1 60FE0CDD
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P 7550 4300
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F 0 "C35" H 7665 4346 50 0000 L CNN
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F 1 "220pF" H 7665 4255 50 0000 L CNN
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F 2 "Capacitor_SMD:C_0402_1005Metric" H 7588 4150 50 0001 C CNN
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F 3 "~" H 7550 4300 50 0001 C CNN
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F 4 "2812289" H 7550 4300 50 0001 C CNN "ordercode"
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F 5 "farnell" H 7550 4300 50 0001 C CNN "supplier"
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1 7550 4300
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1 0 0 -1
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$EndComp
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$Comp
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L power:GND #PWR0156
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U 1 1 60FE0CE3
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P 7250 4750
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F 0 "#PWR0156" H 7250 4500 50 0001 C CNN
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F 1 "GND" H 7255 4577 50 0000 C CNN
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F 2 "" H 7250 4750 50 0001 C CNN
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F 3 "" H 7250 4750 50 0001 C CNN
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1 7250 4750
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1 0 0 -1
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$EndComp
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$Comp
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L power:GND #PWR0157
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U 1 1 60FE0CE9
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P 7550 4750
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F 0 "#PWR0157" H 7550 4500 50 0001 C CNN
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F 1 "GND" H 7555 4577 50 0000 C CNN
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F 2 "" H 7550 4750 50 0001 C CNN
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F 3 "" H 7550 4750 50 0001 C CNN
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1 7550 4750
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1 0 0 -1
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$EndComp
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Wire Wire Line
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7550 4750 7550 4450
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Wire Wire Line
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7250 4750 7250 4450
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Connection ~ 7550 3650
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Connection ~ 7250 3950
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Text Label 7650 3650 0 70 ~ 0
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VO+
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Text Label 7650 3950 0 70 ~ 0
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VO-
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Wire Wire Line
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7900 3650 7900 3750
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Wire Wire Line
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7900 3750 7950 3750
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Wire Wire Line
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7550 3650 7900 3650
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Wire Wire Line
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7950 3850 7900 3850
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Wire Wire Line
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7900 3850 7900 3950
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Wire Wire Line
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7250 3950 7900 3950
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Text HLabel 7950 3750 2 50 Output ~ 0
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SPKOUT+
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Text HLabel 7950 3850 2 50 Output ~ 0
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SPK_OUT-
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Wire Wire Line
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5150 3650 5350 3650
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Wire Wire Line
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5350 4350 5250 4350
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Connection ~ 5250 4350
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Wire Wire Line
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5250 4350 5250 4750
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Wire Wire Line
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6550 3950 7250 3950
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Wire Wire Line
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6550 3650 7550 3650
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$EndSCHEMATC
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