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MOSA
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
4 Stereo Inputs and 4-Channel Outputs Volume, Tone, Balance, Fader, Loudness, and Selectable Input Gain
FEATURES
*Operation range : 2.7V~5V *4 stereo inputs with selectable input gain *4 independent speaker controls for fader and balance *Tone controls (treble and bass) and loudness function *Independent mute function *Volume control in 1.25 dB/step *I2C interface *Components less and good PSRR *Housed in SOP32 packages
APPLICATIONS
*Portable audio device *Car stereo audio *Hi-Fi audio system *Cross-reference: PT2312
DESCRIPTION
The MS6712 is a 4 stereo inputs/4-channel outputs digital control audio processor for the low voltage operation. Volume, tone (bass and treble), balance (left/right), and fader (front/rear) processor are incorporated into a single chip. The MS6712 also has the loudness function and selectable input gain. These functions can be built a Hi-Fi audio system easily. All functions are programmable via the serial I2C bus. The default states of the chip as the power is on are: the volume is -78.75dB, the stereo 4 is selected, all the speakers are mute and the gains of the input stage, the bass and the treble are 0dB.
BLOCK DIAGRAM
LOUT 21 LIN LOUD_L BOUT_L BIN_L 20 15 23 22 TREB_L 5
Speaker ATT
29
OUT_LF
RB
Mute Speaker ATT
LIN1 LIN2 LIN3 LIN4
19 18 17 16
Volume & Londness Input Selector &Gain Control Volume & Londness
Bass
Treble
27
Mute
OUT_LR
32
Serial Bus Decoder and Latches
RIN4 RIN3 RIN2 RIN1
10 11 12 13
SCL 31 SDA 30 DGND
Speaker ATT
Bass
Treble
28
OUT_RF
Mute RB Speaker ATT
Supply
2 3 1 8 7 9 25
26
OUT_RR
24
6 TREB_R
Mute
AVDD AGND REF ROUT
RIN LOUD_R BOUT_R BIN_R
REV1.0
1
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PIN CONFIGURATION
Symbol REF VDD AGND NC TREB_L TREB_R RIN ROUT LOUD_R RIN4 RIN3 RIN2 RIN1 NC LOUD_L LIN4 LIN3 LIN2 LIN1 LIN LOUT BIN_L BOUT_L BIN_R BOUT_R OUT_RR OUT_LR OUT_RF OUT_LF DGND SDA SCL Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Description Analog Reference Voltage1/2VDD Supply Input Voltage Analog Ground No connected Left Channel Input for Treble Controller Right Channel Input for Treble Controller
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
Audio Processor Right Channel Input Gain Output and Input Selector for Right Channel Right Channel Loudness Input Right Channel Input 4 Right Channel Input 3 Right Channel Input 2 Right Channel Input 1 No connected Left Channel Loudness Input Left Channel Input 4 Left Channel Input 3 Left Channel Input 2 Left Channel Input 1 Audio Processor Left Channel Input Gain Output and Input Selector for Left Channel Left Bass Controller Input Channel Left Bass Controller Output Channel Right Bass Controller Input Channel Right Bass Controller Output Channel Right Rear Speaker Output Left Rear Speaker Output Right Front Speaker Output Left Front Speaker Output Digital Ground I2C Data Input I2C Clock Input
REF 1 VDD 2 AGND 3 NC 4 TREB_L 5 TREB_R 6 RIN 7 ROUT 8 LOUD_R 9 RIN4 10 RIN3 11 RIN2 12 RIN1 13 NC 14 LOUD_L 15 LIN4 16
32 SCL 31 SDA 30 DGND 29 OUT_LF 28 OUT_RF 27 OUT_LR 26 OUT_RR
MS6712
25 BOUT_R 24 BIN_R 23 BOUT_L 22 BIN_L 21 LOUT 20 LIN 19 LIN1 18 LIN2 17 LIN3
SOP32
REV1.0
2
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ORDERING INFORMATION
Package 32-Pin SOP (lead free) 32-Pin SOP (lead free) RoHS Compliance Part number MS6712GTR MS6712GU
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
Packaging Marking MS6712G MS6712G
Transport Media 1k Units Tape and Reel 23 Units Tube
ABSOLUTE MAXIMUM RATINGS
Symbol VDD VESD TSTG TA TJ TS RTHJA Supply Voltage Electrostatic Handling Storage Temperature Range Operating Ambient Temperature Range Maximum Junction Temperature Soldering Temperature, 10 seconds Thermal Resistance from Junction to Ambient in Free Air SOP32 SSOP32 Parameter Rating 6 -3000 to 3000 -65 to 150 -40 to 85 150 260 210 210 Unit V V /W
OPERATING RATINGS
Symbol VDD Supply Voltage Parameter Min 2.7 Typ Max 5.5 Unit V
REV1.0
3
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MOSA
5V ELECTRICAL CHARACTERISTICS
Symbol Supply IQ PSRR RIN GIN GSTEP ERRG LOUD Quiescent Current Power Supply Rejection Ratio Input Resistance Input Gain Range Step Resolution Gain Setting error Loudness VIN=0V Parameter
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
(Ta=25, All stages 0dB, f=1kHz, CREF =22uF, refer to the application circuit; unless otherwise specified) Conditions Min 55 35 0 -0.2 CLoud=100nF, f =20Hz Volume=-40dB Attenuation Av = 0 to -40dB Av = -40 to -60dB Attenuation 19 Typ 12.2 60 50 3.75 0 20 Max 12.5 70 11.25 0.2 Unit mA dB k dB dB dB dB
CREF = 22uF, f = 100Hz Input 1,2,3,4 Gain
Input Selectors
Volume control CRVOL RESVOL ERRVOL Volume Control Range Volume Step Resolution Volume Setting Error -78.75 -0.5 -1 -37.5 -0.2 Boost/Cut f =100Hz -14 -0.3 34 Boost/Cut f =20kHz (THD+N)/S <0.3% VOUT=2Vpp VOUT=4Vpp -14 -0.3 4.3 93 2 1.25 0 0 1.25 0 -65 2 0 44 2 0 -75 0.0177 97 97 0 1 5 0 0.1 -60 14 0.1 58 14 0.1 0.8 dB dB dB dB dB dB dB dB dB dB dB k dB dB dB Vpp dB % dB dB V V
Speaker Attenuators CRSPK RESSPK ERRSPK MUTE CRTRE RESTRE ERRTRE RB CRBAS RESBAS ERRBAS General VOMAX THD+N S/N CS Bus Input VIH VIL Bus High Input Level Bus Low Input Level Maximum Output Voltage Swing Total Harmonic Distortion Plus Noise Signal-to-Noise Ratio Channel Separation Left/Right Speaker Control Range Speaker Step Resolution Speaker Setting Error Output Mute Attenuation Bass Control Range Bass Step Resolution Bass Setting Error Internal Feedback Resistance Treble Control Range Treble Step Resolution Treble Setting Error
Bass Control
Treble Control
Notes: Bass and Treble response see to curve. The center frequency and quality of the response behavior can be chosen by the external.
REV1.0
4
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2.7V ELECTRICAL CHARACTERISTICS
Symbol Supply IQ PSRR General VOMAX THD+N S/N CS Maximum Output Voltage Swing Total Harmonic Distortion Plus Noise Signal-to-Noise Ratio Channel Separation Left/Right Quiescent Current Power Supply Rejection Ratio VIN=0V Parameter
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
(Ta=25, All stages 0dB, f=1kHz, CREF =22uF, refer to the application circuit; unless otherwise specified) Conditions Min 53 90 90 Typ 8.7 58 2.5 -50 0.3 94 94 Max 9 Unit mA dB Vpp dB % dB dB
CREF = 22uF, f = 100Hz (THD+N)/S <0.3% VOUT=2Vpp VOUT=2.5Vpp
TYPICAL PERFORMANCE CHARACTERISTICS
(Ta=25, All stages 0dB, f=1kHz, CREF =22uF, refer to the application circuit; unless otherwise specified)
VDD=5V
VDD=5V Volume=-40dB
100nF
33nF
OPEN
Loud (dB)
Loud (dB)
Loud (dB)
10nF
220nF
Loudness OFF VDD=5V CLOUD = 100nF
56nF
VOLUME (dB)
FREQUENCY (Hz)
FREQUENCY (Hz)
Loudness vs. Volume
Loudness vs. Frequency vs. Volume
Loudness vs. External Capacitors
CHANNEL SEPARATION (dB)
VDD=2.7V VIN=-3dBV
VDD=5V VIN=0dBV
VDD=5V Treble=Bass= -14~14dB
FREQUENCY (Hz)
FREQUENCY (Hz)
QUIESCENT CURRENT (mA)
Tone (dB)
SUPPLY VOLTAGE (V)
Typical Tone Response
Channel Separation vs. Frequency
Quiescent Current vs. Supply Voltage
REV1.0
5
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MOSA
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
VDD=2.7V VO=2Vpp
f=1kHz
THD+N (%)
THD+N (%)
f=20kHz
THD+N (%)
f=20Hz
f=20kHz
f=20Hz
VDD=5V VO=2Vpp VDD=5V
f=1kHz VDD=2.7V
FREQUENCY (Hz)
OUTPUT VOLTAGE (dBV)
OUTPUT VOLTAGE (dBV)
THD+N vs. Frequency
THD+N vs. Output Voltage
THD+N vs. Output Voltage
CAP=22uF
CAP=22uF
PSRR (dB)
CAP=10uF
PSRR (dB)
CAP=10uF
VDD=5V VRR=-20dBV
VDD=2.7V VRR=-20dBV
FREQUENCY (Hz)
FREQUENCY (Hz)
PSRR vs. Frequency
PSRR vs. Frequency
REV1.0
6
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MOSA
I2C BUS DESCRIPTION
Start and Stop Conditions
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
A start condition is activated when the SCL is set to HIGH and SDA shifts from HIGH to LOW state. The stop condition is activated when SCL is set to HIGH and SDA shifts from LOW to HIGH state. Please refer to the timing diagram below.
SCL
SDA
Start
Stop
SCL : Serial Clock Line, SDA : Serial Data Line
Data Validity A data on the SDA line is considered valid and stable only when the SCL signal is in HIGH state. The HIGH and LOW states of the SDA line can only change when the SCL signal is LOW. Please refer to the figure below.
SDA
SCL Data line stable, Data valid Data change allowed
Byte Format Every byte transmitted to the SDA line consists of 8 bits. Each byte must be followed by an acknowledge bit. The MSB is transmitted first.
Acknowledge During the Acknowledge clock pulse, the master (up) put a resistive HIGH level on the SDA line. The peripheral (audio processor) that acknowledges has to pull-down (LOW) the SDA line during the Acknowledge clock pulse so that the SDA line is in a stable LOW state during this clock pulse. Please refer to the diagram below.
SCL 1 2 3 7 8 9
SDA MSB Start Acknowledge
The audio processor that has been addressed has to generate an Acknowledge after receiving each byte, otherwise, the SDA line will remain at the HIGH level during the ninth (9th) clock pulse. In this case, the master transmitter can generate the STOP information in order to abort the transfer.
REV1.0
7
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Timing of SDA and SCL Bus Lines
SDA tf SCL
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
tLOW
tr
tSU;DAT
tf
tHD;STA
tSP
tr
tBUF
S
tHD;STA
tHD;DAT
tHIGH
tSU;STA
Sr
tSU;STO
P
S
Standard Mode Symbol fSCL tHD:STA tLOW tHIGH tSU:STA tHD:DAT tSU:DAT tr tf tSU:STO tBUF Cb VnL VnH
Parameter
Min 0 4.0 4.7 4.0 4.7 0 250 4.0 4.7 -
Max 100 3.45 1000 300 400 -
Unit kHz us us us us us ns ns ns us us pF V V
SCL clock frequency Hold time (repeated) START condition. After this period, the first clock pulse is generated LOW period of the SCL clock HIGH period of the SCL clock Set-up time for a repeated START condition Data hold time: For I2C-bus devices Data-set-up time Rise time of both SDA and SCL signals Fall time of both SDA and SCL signals Set-up time for STOP condition Bus free time between a STOP and START condition Capacitive load for each bus line
Noise margin at the LOW level for each connected device (including 0.1VDD hysteresis) Noise margin at the HIGH level for each connected device (including 0.2VDD hysteresis)
BUS INTERFACE
Data are transmitted to and from the MCU to the MS6712 via the SDA and SCL. The SDA and SCL make up the BUS interface. It should be noted that pull-up resistors must be connected to the positive supply voltage.
VDD
Rp Rp
Pull up resistors
SDA (Serial Data Line)
SCL (Serial Clock Line)
MCU
MS6712
REV1.0
8
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Interface Protocol
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
The format consists of the following *A START condition *A chip address byte including the MS6712 address. (7bits) *The 8th bit of the byte must be "0".(write=0, read=1) *MS6712 must always acknowledge the end of each transmitted byte. *A data sequence (N-bytes + Acknowledge) *A STOP condition
SDA
SCL
1-7
8
9
1-7
8
9
1-7
8
9
S START CONDITION ADDRESS R / -W ACK DATA ACK DATA ACK
P STOP CONDITION
Address Code The chip address of the MS6712 is 88H.
1 0 0 0 1 0 0 0 W
7 bits address MS6712 address
Data Bytes Description The default states of the chip as the power is on are: the volume is -78.75dB, the stereo 4 is selected, all the speakers are mute and the gains of the input stage, the bass and the treble are 0dB. MSB 0 1 1 1 1 0 0 0 0 1 1 0 0 1 1 1 B2 0 1 0 1 0 1 1 B1 B1 B1 B1 B1 G1 0 1 B0 B0 B0 B0 B0 G0 C3 C3 A2 A2 A2 A2 A2 L C2 C2 A1 A1 A1 A1 A1 S1 C1 C1 LSB A0 A0 A0 A0 A0 S0 C0 C0 Function Volume Control Speaker ATT LR Speaker ATT RR Speaker ATT LF Speaker ATT RF Audio Switch Bass Control Treble Control
Where Ax = 1.25dB/step; Bx = 10dB/step; Cx = 2dB/step; Gx = 3.75dB/step
REV1.0
9
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Volume MSB 0 0 B2 B1 B0 A2 0 0 0 0 1 1 1 1 0 0 B2 0 0 0 0 1 1 1 1 The default volume is -78.75dB. B1 0 0 1 1 0 0 1 1 B0 0 1 0 1 0 1 0 1 A2
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
LSB A1 0 0 1 1 0 0 1 1 A1 A0 0 1 0 1 0 1 0 1 A0
Function Volume 1.25 dB steps 0 -1.25 -2.5 -3.75 -5 -6.25 -7.5 -8.75 Volume 10dB steps 0 -10 -20 -30 -40 -50 -60 -70
Speaker Attenuator MSB 1 1 1 1 0 0 1 1 0 1 0 1 B1 B1 B1 B1 B0 B0 B0 B0 A2 A2 A2 A2 0 0 0 0 1 1 1 1 0 0 1 1 1 0 1 0 1 1 1 1 1 A1 A1 A1 A1 0 0 1 1 0 0 1 1 LSB A0 A0 A0 A0 0 1 0 1 0 1 0 1 FunctiondB Speaker LF Speaker RF Speaker LR Speaker RR 0 -1.25 -2.5 -3.75 -5 -6.25 -7.5 -8.75 0 -10 -20 -30 Mute
LF: Left Front, RF: Right Front, LR: Left Rear, RR: Right Rear The default state is mute.
REV1.0 10
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MOSA
Audio Switch MSB 0 1 0 G1 G0 L
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
LSB S1 0 0 1 1 0 1 0 0 1 1 0 1 0 1 S0 0 1 0 1
Function Audio Switch Stereo 1 Stereo 2 Stereo 3 Stereo 4 Loudness ON Loudness OFF +11.25dB +7.5dB +3.75dB 0dB
The default state is stereo 4, loudness off and gain 0dB.
Bass and Treble MSB 0 0 1 1 1 1 0 1 C3 C3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 The default state is bass 0dB and treble 0dB. C2 C2 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 C1 C1 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 LSB C0 C0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 FunctiondB Bass Treble -14 -12 -10 -8 -6 -4 -2 0 0 2 4 6 8 10 12 14
REV1.0
11
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MOSA
Examples Set Volume at -37.5dB.
MSB Start LSB ACK 0 0 0 Data byte 1 -30dB Volume 1 1
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
MS6712 Address
1
0
ACK
Stop
-7.5dB
Set Speaker RF at -30dB.
MSB Start LSB ACK 1 0 1 Data byte 1 1 0 0 0dB 0 ACK Stop
MS6712 Address
Speaker RF
-30dB
Set Speaker RR in mute-on.
MSB Start LSB ACK 1 1 1 Data byte 1 1 1 Mute 1 1 ACK Stop
MS6712 Address
Speaker RR
Set Stereo 2 Input with gain of +7.5 dB and Loudness on.
MSB Start LSB ACK 0 1 0 Data byte 0 1 0 0 1 ACK Stop
MS6712 Address
+7.5dB Stereo 2 Loudness ON
Set Treble at -10dB.
MSB Start LSB ACK 0 1 1 Data byte 1 0 0 1 0 ACK Stop
MS6712 Address
Treble
-10dB
REV1.0
12
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APPLICATION INFORMATION
Basic Application Example
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
5.6K
MCU
30 31 32
2.2u 100n
21 20 15
100n
23
100n
22
2.7n
5
LOUT
LIN
LOUD_L
BIN_L
TREB_L
SDA
DGND
SCL
BOUT_L
2.2u
19 13 18 12
LIN1 RIN1 LIN2 RIN2 LIN3 RIN3 LIN4 RIN4
BOUT_R LOUD_R BIN_R AGND ROUT AVDD
10u OUT_LF OUT_LR
29
10u
27
INPUT
17 11 16 10
MS6712
OUT_RF
28
OUTPUT 10u
10u OUT_RR
TREB_R
26
2.2u
REF
1
RIN
2
3
8
7
9
25
24
6
22u AVDD 2.2u
100n
100n 5.6K
100n
2.7n
REV1.0
13
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EXTERNAL DIMENSIONS
SOP32 (300mil)
D
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
Detail A
EH
h x45 C
A
e
B A1
0.25 mm Detail A L
Dimension in mm Symbol Min A A1 B C e E H L D h 2.35 0.10 0.33 0.23 7.40 10.00 0.40 20.32 0.25 0
o
Dimension in inch Min 0.0926 0.0040 0.013 0.0091 0.2914 0.394 0.016 0.800 0.010 0
o
Max 2.65 0.30 0.51 0.32 7.60 10.65 1.27 20.73 0.75 8
o
Max 0.1043 0.0118 0.020 0.0125 0.2992 0.419 0.050 0.816 0.029 8o
1.27 BASIC
0.050 BASIC
REV1.0
14
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DEMO BOARD
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
The demo board used IR technique controller to control the MS6712. The default states of demo board are Stereo 4, Input Gain 0dB, Volume -20dB, Attenuator Speakers 0dB, Loudness Off, Bass 0dB and Treble 0dB.
2 1
3
5 1 4
Label 1: Supply Voltage
The AVDD and DVDD should be the same supply voltage, the supply range is 2.7~5.5 VDC.
Label 2: LED Indicator
The LEDs indicate stereo input channel , IR received status and power status. It is red-dark blink once when the MCU has received the function code correctly.
Label 3: Output Section
There are four output channels in the section that divide into front output and rear output. Please connected to a postpower-amplifier, as active speaker.
Label 4: Input Section
There are four stereo inputs in the section. Please input stereo audio signal, as music or sine wave.
Label 5: MCU Reset
The MS6712 will be loaded the default values by MCU. The default states are Stereo 4, Input Gain 0dB, Volume -20dB, Attenuator Speakers 0dB, Loudness Off, Bass 0dB and Treble 0dB. The stereo 4 is connected internally, but not available on pins.
REV1.0
15
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MOSA
IR Controller
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
IN1, IN2, IN3, IN4 : Select Stereo Input. IN1, 2, 3, 4 represents Stereo Input 1, 2, 3, 4. The active input will be indicated by the LEDs. VOL+, VOL- : The volume control keys. The volume control in 1.5dB/step as the switch is pressed once, the range is -79dB to 0dB. LF-speaker , RF-speaker, LR-speaker, and RR-speaker are synchronic action. Gain+, Gain- : The gain control keys for stereo input. The gain control in 3.75dB/step as the switch is pressed once, the range is 0dB to 11.25dB. LF+, LF- : The attenuation control keys for Left-Front speaker. The attenuation in 1.25dB/step as the switch is pressed once, the range is -37.5dB to 0dB. RF+, RF- : The attenuation control keys for Right-Front speaker. The attenuation in 1.25dB/step as the switch is pressed once, the range is -37.5dB to 0dB. LR+, LR- : The attenuation control keys for Left-Rear speaker. The attenuation in 1.25dB/step as the switch is pressed once, the range is -37.5dB to 0dB. RR+, RR- : The attenuation control keys for Right-Rear speaker. The attenuation in 1.25dB/step as the switch is pressed once, the range is -37.5dB to 0dB. TRE+, TRE- : The treble control keys. The treble control in 2dB/step as the switch is pressed once, the range is -14dB to 14dB. BAS+, BAS- : The bass control keys. The bass control in 2dB/step as the switch is pressed once, the range is -14dB to 14dB. Loud : The loudness key Press the key once to set loudness on or loudness off. Mute : The mute key controls all output speaker outputs Press the key once to set mute-on or mute-off for four speaker outputs.
REV1.0 16
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Circuit
J1 1 2 J3 1 2 3 LCD DVCC RX TX DVCC + C4 0.1u + C1 10u S1 RST RX TX IR_IN Y1 12M J5 AVDD C7 20P + AVDD + + C9 C10 0.1u 0.1u 10u C13 IN4 10u C14 10u + C12 + C27 22u 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 + SCL SDA 1 2 3 4 5 6 7 8 9 10 + C3 10u U1 RST P3.0 P3.1 XTAL2 XTAL1 P3.2 P3.3 P3.4 P3.5 GND AT89X51
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
R1 220 R2 1K R3 10K C2 47u + 3 2 R4 C6 20P 10K + Vcc P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 P1.0 P3.7 20 19 18 17 16 15 14 13 12 11 IR_IN + C5 470p D1 Power 5 4 3 2 1 1 J2 VS GND IR IR J4 OUT
1 2
J6 + SCL SDA DGND LFOUT RFOUT LROUT RROUT BOUT_R BIN_R BOUT_L BIN_L LOUT LIN LIN1 LIN2 LIN3 U2 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 SCL SDA 10u 10u 10u 10u C8 C11 C32 C33 REAR_OUT FRONT_OUT J12 +
J7
INPUT
J8
J9 + 10u C15 IN3 10u C16
REF VDD AGND CODE TREB_L TREB_R RIN ROUT LOUD_R RIN4 RIN3 RIN2 RIN1 NC LOUD_L LIN4 MS6712
+
+
+
9 8 7 6 5 4 3 2 1
+
+ J10 + 10u C17 IN2 10u C18 C19 2.2u
+
J11 + 10u IN1 10u C24 C25
C20 C21 + + 0.1u 0.1u
C22 + 0.1u
C23 + 0.1u
+
C26 2.2u
+ C28 2.7n
+ C29 2.7n
+ C30 0.1u
+ C31 0.1u
W1 Jumper
REV1.0
17
+
R5 5.6K
R6 5.6K
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