STEVAL-CCA021V1 STMicroelectronics, STEVAL-CCA021V1 Datasheet - Page 22

• Manufacturer Part Number: STEVAL-CCA021V1
• Description: BOARD EVAL AUDIO FOR STM32F103
• Manufacturer: STMicroelectronics

Specifications of STEVAL-CCA021V1

• Amplifier Type: Class D
• Output Type: Mono jack connector, 2 terminal connectors, 2 RCA jacks
• Max Output Power X Channels @ Load: 2.2W x 1 or 2 @ 4 Ohm
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: STM32F103, TS4657(TS2012, TS4962, TS472)
• Description/function: Audio D/A
• Operating Supply Voltage: 3 V to 5.5 V
• Output Power: 2.8 W
• Product: Audio Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: TS4657
• Other names: 497-10338

Connectors and functionality of the TS4657 audio card
Figure 19. TS4657 stereo audio DAC functionality
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DAC_FMT2
DAC_FMT1
10 KΩ
DAC_LRCLK
DAC_SDAT
DAC_BCLK
DAC_MCLK
R7
GND GND
TS4962 mono Class-D power amplifier functionality
The TS4962 is a differential Class-D power amplifier. It is able to drive up to 1.4 W into
a 8 Ω load at 5 V. The gain of the device can be controlled via two external gain-setting
resistors R14 and R16. The amplifier is configured in single ended input configuration and
signaled from the left channel of the TS4657 audio DAC. A standby function (active low)
allows switching the amplifier off. As in previous cases there is an internal weak pull down
resistor on this standby pin and an external 10 KΩ (R13) resistor connected to the GND
which is useful when utilizing the amplifier with a microcontroller. L5, L6, C32, C33 filters
increase the EMI when an external speaker is connected through long cables. The amplifier
is powered from +5 V coming from the controller board.
R8
10 KΩ
3
4
5
6
7
8
LRCLK
FMT2
FMT1
MCLK
SDAT
BCLK
DAC_STBY
Control interface
interface
Digital
audio
NCP
PCP
9
GND
10 KΩ
V CCA
STDBY
R20
1 µF
C1
13
GND
5 V
Digital
filters
20
19
Doc ID 15867 Rev 1
V CCD
5 V
LDO
2
1 µF
C2
GNDD
1
GND
DAC
DAC
10
GNDA
GNDA
LDO
V REGD
15
GND
1 µF
C3
18
16
GNDA
DAC
17
GNDD
V REGA
L OUT
R OUT
21
14
E-PAD
1 µF
C4
GND
12
11
U1
820 Ω
820 Ω
C14
2.2 nF
C10
2.2 nF
R4
R5
GND
GND
RCA WBTOR 1
RCA WBTOR 1
GND
GND
UM0722
J3
AM00488
J1