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headphone_amp.sch
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EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 8 12
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Device:R_POT_Dual_Separate RV?
U 1 1 60365B31
P 3700 1850
AR Path="/60365B31" Ref="RV?" Part="1"
AR Path="/60360678/60365B31" Ref="RV801" Part="1"
F 0 "RV801" H 3630 1896 50 0000 R CNN
F 1 "HEADPHONE_VOL" H 3630 1805 50 0000 R CNN
F 2 "sam:PTV112" H 3700 1850 50 0001 C CNN
F 3 "~" H 3700 1850 50 0001 C CNN
1 3700 1850
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR?
U 1 1 60365B3A
P 3700 1700
AR Path="/60365B3A" Ref="#PWR?" Part="1"
AR Path="/60360678/60365B3A" Ref="#PWR0801" Part="1"
F 0 "#PWR0801" H 3700 1450 50 0001 C CNN
F 1 "GND" H 3705 1527 50 0000 C CNN
F 2 "" H 3700 1700 50 0001 C CNN
F 3 "" H 3700 1700 50 0001 C CNN
1 3700 1700
-1 0 0 1
$EndComp
$Comp
L power:GND #PWR?
U 1 1 60365B4D
P 4050 2150
AR Path="/60365B4D" Ref="#PWR?" Part="1"
AR Path="/60360678/60365B4D" Ref="#PWR0803" Part="1"
F 0 "#PWR0803" H 4050 1900 50 0001 C CNN
F 1 "GND" H 4055 1977 50 0000 C CNN
F 2 "" H 4050 2150 50 0001 C CNN
F 3 "" H 4050 2150 50 0001 C CNN
1 4050 2150
1 0 0 -1
$EndComp
$Comp
L Device:R_POT_Dual_Separate RV?
U 2 1 6036C840
P 3800 4000
AR Path="/6036C840" Ref="RV?" Part="1"
AR Path="/60360678/6036C840" Ref="RV801" Part="2"
F 0 "RV801" H 3730 4046 50 0000 R CNN
F 1 "HEADPHONE_VOL" H 3730 3955 50 0000 R CNN
F 2 "sam:PTV112" H 3800 4000 50 0001 C CNN
F 3 "~" H 3800 4000 50 0001 C CNN
2 3800 4000
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR?
U 1 1 6036C849
P 3800 3850
AR Path="/6036C849" Ref="#PWR?" Part="1"
AR Path="/60360678/6036C849" Ref="#PWR0802" Part="1"
F 0 "#PWR0802" H 3800 3600 50 0001 C CNN
F 1 "GND" H 3805 3677 50 0000 C CNN
F 2 "" H 3800 3850 50 0001 C CNN
F 3 "" H 3800 3850 50 0001 C CNN
1 3800 3850
-1 0 0 1
$EndComp
$Comp
L power:GND #PWR?
U 1 1 6036C85C
P 4050 4250
AR Path="/6036C85C" Ref="#PWR?" Part="1"
AR Path="/60360678/6036C85C" Ref="#PWR0804" Part="1"
F 0 "#PWR0804" H 4050 4000 50 0001 C CNN
F 1 "GND" H 4055 4077 50 0000 C CNN
F 2 "" H 4050 4250 50 0001 C CNN
F 3 "" H 4050 4250 50 0001 C CNN
1 4050 4250
1 0 0 -1
$EndComp
Text HLabel 3500 4500 0 50 Input ~ 0
IN_R
Text HLabel 3150 2000 0 50 Input ~ 0
IN_L
Text HLabel 6200 4250 2 50 Input ~ 0
OUT_R
Text HLabel 6550 1950 2 50 Input ~ 0
OUT_L
Wire Wire Line
3800 4500 3800 4150
Wire Wire Line
3150 2000 3700 2000
Wire Wire Line
3800 4500 3500 4500
Wire Wire Line
4050 2150 4200 2150
Wire Wire Line
4050 4250 4200 4250
$Comp
L Amplifier_Operational:OPA1688 U801
U 1 1 60CDF78E
P 5300 1950
F 0 "U801" H 5300 2317 50 0000 C CNN
F 1 "OPA1688" H 5300 2226 50 0000 C CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 5300 1950 50 0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lm358.pdf" H 5300 1950 50 0001 C CNN
1 5300 1950
1 0 0 -1
$EndComp
$Comp
L Amplifier_Operational:OPA1688 U801
U 2 1 60CE29C0
P 5300 4100
F 0 "U801" H 5300 4467 50 0000 C CNN
F 1 "OPA1688" H 5300 4376 50 0000 C CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 5300 4100 50 0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lm358.pdf" H 5300 4100 50 0001 C CNN
2 5300 4100
1 0 0 -1
$EndComp
$Comp
L Amplifier_Operational:OPA1688 U801
U 3 1 60CE3E42
P 7750 2900
F 0 "U801" H 7708 2946 50 0000 L CNN
F 1 "OPA1688" H 7708 2855 50 0000 L CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 7750 2900 50 0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lm358.pdf" H 7750 2900 50 0001 C CNN
3 7750 2900
1 0 0 -1
$EndComp
Wire Wire Line
3850 1850 5000 1850
$Comp
L Device:R R803
U 1 1 60CE75F0
P 4900 2700
F 0 "R803" V 4693 2700 50 0000 C CNN
F 1 "6k" V 4784 2700 50 0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 4830 2700 50 0001 C CNN
F 3 "~" H 4900 2700 50 0001 C CNN
1 4900 2700
0 1 1 0
$EndComp
$Comp
L Device:R R801
U 1 1 60CE8166
P 4350 2150
F 0 "R801" V 4143 2150 50 0000 C CNN
F 1 "1k" V 4234 2150 50 0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 4280 2150 50 0001 C CNN
F 3 "~" H 4350 2150 50 0001 C CNN
1 4350 2150
0 1 1 0
$EndComp
Wire Wire Line
4500 2150 5000 2150
Wire Wire Line
5000 2150 5000 2050
Connection ~ 5000 2150
Wire Wire Line
5000 2250 4750 2250
Wire Wire Line
4750 2250 4750 2700
Wire Wire Line
5000 2250 5000 2150
Wire Wire Line
5050 2700 5600 2700
Wire Wire Line
5600 1950 6550 1950
Connection ~ 5600 1950
Wire Wire Line
3950 4000 5000 4000
$Comp
L Device:R R802
U 1 1 60CECBE9
P 4350 4250
F 0 "R802" V 4143 4250 50 0000 C CNN
F 1 "1k" V 4234 4250 50 0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 4280 4250 50 0001 C CNN
F 3 "~" H 4350 4250 50 0001 C CNN
1 4350 4250
0 1 1 0
$EndComp
Wire Wire Line
4500 4250 4900 4250
Wire Wire Line
4900 4250 4900 4200
Wire Wire Line
4900 4200 5000 4200
$Comp
L Device:R R804
U 1 1 60CEEF1F
P 5050 4850
F 0 "R804" V 4843 4850 50 0000 C CNN
F 1 "6k" V 4934 4850 50 0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 4980 4850 50 0001 C CNN
F 3 "~" H 5050 4850 50 0001 C CNN
1 5050 4850
0 1 1 0
$EndComp
Connection ~ 4900 4250
Wire Wire Line
5200 4850 5600 4850
Wire Wire Line
5600 4250 6200 4250
Connection ~ 5600 4250
Wire Wire Line
5600 4250 5600 4100
$Comp
L power:GND #PWR0805
U 1 1 60CF2963
P 7650 2100
F 0 "#PWR0805" H 7650 1850 50 0001 C CNN
F 1 "GND" H 7655 1927 50 0000 C CNN
F 2 "" H 7650 2100 50 0001 C CNN
F 3 "" H 7650 2100 50 0001 C CNN
1 7650 2100
-1 0 0 1
$EndComp
$Comp
L power:GND #PWR0806
U 1 1 60CF3162
P 7650 3600
F 0 "#PWR0806" H 7650 3350 50 0001 C CNN
F 1 "GND" H 7655 3427 50 0000 C CNN
F 2 "" H 7650 3600 50 0001 C CNN
F 3 "" H 7650 3600 50 0001 C CNN
1 7650 3600
1 0 0 -1
$EndComp
$Comp
L Device:C C803
U 1 1 60CF4337
P 7650 2350
F 0 "C803" H 7765 2396 50 0000 L CNN
F 1 "0.1u" H 7765 2305 50 0000 L CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 7688 2200 50 0001 C CNN
F 3 "~" H 7650 2350 50 0001 C CNN
1 7650 2350
1 0 0 -1
$EndComp
$Comp
L Device:C C804
U 1 1 60CF4F11
P 7650 3400
F 0 "C804" H 7765 3446 50 0000 L CNN
F 1 "0.1u" H 7765 3355 50 0000 L CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 7688 3250 50 0001 C CNN
F 3 "~" H 7650 3400 50 0001 C CNN
1 7650 3400
1 0 0 -1
$EndComp
Wire Wire Line
7650 3600 7650 3550
Wire Wire Line
7650 3250 7650 3200
Wire Wire Line
7650 2500 7650 2600
Wire Wire Line
7650 2200 7650 2100
Wire Wire Line
5600 1950 5600 2700
Wire Wire Line
5600 4250 5600 4850
Wire Wire Line
4900 4250 4900 4850
Wire Wire Line
7650 2500 7950 2500
Connection ~ 7650 2500
Wire Wire Line
7650 3250 7950 3250
Connection ~ 7650 3250
$Comp
L power:VDD #PWR0137
U 1 1 60B61EA0
P 7950 2500
F 0 "#PWR0137" H 7950 2350 50 0001 C CNN
F 1 "VDD" V 7967 2628 50 0000 L CNN
F 2 "" H 7950 2500 50 0001 C CNN
F 3 "" H 7950 2500 50 0001 C CNN
1 7950 2500
0 1 1 0
$EndComp
$Comp
L power:VSS #PWR0138
U 1 1 60B627A3
P 7950 3250
F 0 "#PWR0138" H 7950 3100 50 0001 C CNN
F 1 "VSS" V 7967 3378 50 0000 L CNN
F 2 "" H 7950 3250 50 0001 C CNN
F 3 "" H 7950 3250 50 0001 C CNN
1 7950 3250
0 1 1 0
$EndComp
$Comp
L Device:C C802
U 1 1 60AB41F1
P 5050 5200
F 0 "C802" V 4798 5200 50 0000 C CNN
F 1 "47p" V 4889 5200 50 0000 C CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 5088 5050 50 0001 C CNN
F 3 "~" H 5050 5200 50 0001 C CNN
1 5050 5200
0 1 1 0
$EndComp
$Comp
L Device:C C801
U 1 1 60AB4CEF
P 4900 3050
F 0 "C801" V 4648 3050 50 0000 C CNN
F 1 "47p" V 4739 3050 50 0000 C CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 4938 2900 50 0001 C CNN
F 3 "~" H 4900 3050 50 0001 C CNN
1 4900 3050
0 1 1 0
$EndComp
Wire Wire Line
4750 3050 4750 2700
Connection ~ 4750 2700
Wire Wire Line
5050 3050 5050 2700
Connection ~ 5050 2700
Wire Wire Line
4900 5200 4900 4850
Connection ~ 4900 4850
Wire Wire Line
5200 5200 5200 4850
Connection ~ 5200 4850
$EndSCHEMATC