STEVAL-CCA021V1 STMicroelectronics, STEVAL-CCA021V1 Datasheet - Page 21

• 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

UM0722
Figure 18. Microphone functionality
9.6
KEEG1542PBL
GNDA
U5
TS4657 stereo audio DAC functionality
The TS4657 is a stereo digital to analog converter. It is a 16-bit multi-bit sigma delta DAC
operating at 256 x audio sample rate with over sampling digital interpolation filters. The
digital audio data can be 16 to 24 bit long and sample rates from 32 to 48 kHz are
supported.
The digital I
data), BCLK (bit clock) and MCLK (master clock - over sampling clock). The selection of the
data format can be performed through two pins (FMT1, FMT2). The supported data formats
are:
●
●
●
●
The standby mode can be entered by driving the standby pin low. The pin features internal
weak pull down resistor. For practical reason there is also an external pull-down resistor R20
which is helpful when utilizing the amplifier with a microcontroller. The same is valid for the
format pins (FMT1, FMT2) and pull down resistors R7 and R8. The RC passives R4, R5,
C10 and C14 are low pass filter network. The output is referenced to ground. The lineout
RCA connectors J1, J3 are available on the board for both audio channels. The DAC is
powered from +5 V coming from the controller board. One single supply is sufficient for the
digital and analog parts of the circuit, thus eliminating the need for external regulators.
C27
1 µF
2
1
GNDA
Right-justified, 16-bit data, Data valid on rising edge of BCLK
Right-justified, 24-bit data, Data valid on rising edge of BCLK
Left-justified, 16-bit up to 24-bit data, Data valid on rising edge of BCLK
I²S, 16-bit up to 24-bit data, Data valid on rising edge of BCLK
R12
1 KΩ
R11
1 KΩ
100 nF
C19
2
S interface has four lines: LRCLK (left - right channel selection), SDAT (audio
100 nF
C20
ST: TS472IQT
GNDA
10
8
5
Bias
2.0 V
C17
100 nF
V CCA
IN+
IN–
Microphone preamplifier
GND
22
20
Doc ID 15867 Rev 1
V CCA
V CC
GNDA
Connectors and functionality of the TS4657 audio card
GND
4
15
C1
STBY
21
GNDA
Bias
14
C2
G
R15
10 KΩ
OUT+
OUT–
GAIN
BYPS
MICRO_SHDN
100 pF
100 pF
C18
C23
17
16
9
2
GNDA
U4
C29
1 µF
GNDA
C28: assembly 0R resistor
for DC coupling
C28
0 Ω / 22 nF
R17
68 Ω
GNDA
Microphone
R3
100 KΩ
MICRO_OUT
AM00487
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