Datasheet
High Sound Quality Audio D/A Converters
32-bit, 768 kHz Sampling
Stereo Audio D/A Converter
BD34352EKV
General Description
Key Specifications
BD34352EKV is 32-bit high sound quality Stereo Audio
D/A converter with ROHM original sound quality design,
realizing excellent numerical performance (SNR: 126 dB
(Typ), THD+N: -112 dB (Typ)) suitable for high-end audio.
Favourite sound is selectable by switching 2 kinds of
digital FIR filters (Sharp Roll-Off, Slow Roll-Off). PCM I/F
supports up to 768 kHz and DSD I/F supports up to 22.4
MHz.
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Supply Voltage Range of AVCC(Note 2) 4.5 V to 5.5 V
Supply Voltage Range of DVDD
Supply Voltage Range of DVDDIO
SNR(Note 1)
1.4 V to 1.6 V
3.0 V to 3.6 V
126 dB (Typ)
-112 dB (Typ)
126 dB (Typ)
THD+N(Note 1)
Dynamic Range(Note 1)
Operation Temperature Range
-25 °C to +85 °C
Package
HTQFP64BV
Features
W (Typ) x D (Typ) x H (Max)
12.0 mm x 12.0 mm x 1.0 mm
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SNR 126 dB (Typ), THD+N -112 dB (Typ) (Note 1)
Sampling Frequency 32 kHz to 768 kHz(Note 1)
2 Kinds of Digital FIR Filters (Note 1)
DSD 2.8 MHz, 5.6 MHz, 11.2 MHz, 22.4 MHz
Available
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Supports Stereo Mode (2ch) and Mono Mode (1ch)
Selectable 4 Device Addresses (38h, 3Ah, 3Ch, 3Eh)
.
Applications
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CD/SACD Player
Digital Audio Player (DAP)
USB-DAC and Others
(Note 1) PCM mode
(Note 2) AVCC, AVCC_R and AVCC_L in Typical Application Circuit
Typical Application Circuit
AVCC_L
5.0 V
DVDDIO
3.3 V
DVDD
1.5 V
100 μF
0.1 μF
100 μF 100 μF
0.1 μF 0.1 μF
100 μF
100 μF
100 μF
100 μF
0.1 μF
100 μF
0.1 μF
100 μF
0.1 μF
100 μF
C35
C15
C17
C16
C18
C7
C8
C1
C2
C19
C20
C3
C4
C5
C6
C11
C12
C13
C14
C9
1500 pF
C10
R5
0.1 μF 0.1 μF
0.1 μF 0.1 μF
R7
R11
560 Ω
64
2
7
9
17
15
11
63
59
61
44 to 47 50
48
53
55
58
56
1 kΩ
560 Ω + 680 Ω
R9
C38
1500 pF
Lch Out
Single
C36
1500 pF
IOUT_LP
IOUT_LN
C37
51
52
R6
BCLK/DSDCLK
BCLK
Current
Segment
R10
R12
1 kΩ
12
R8
C39
1500 pF
AVCC
5.0 V
Over
560 Ω + 680 Ω
C21
LRCLK/DSD2
LRCLK
Lch Out
Differential
Sampling
Digital
FIR
PCM
100 μF
C22
ΔΣ
Modulator
13
DSP
AVCC 42
I/F
0.1 μF
AVCC_L
5.0 V
100 μF
C23
Audio
Function
Control
DIN/DSD1
DIN
Filter
0.1 μF
14
VREF_L
C24
43
EXT_RES_L
41
(Note 3)
R1
MCLK
The written values of external parts
are checked by sound test. Changing
these values can affect the sound
quality. Please check the sound
when the values are changed.
VREF
910 Ω
R2
EXT_RES_R
40
910 Ω
AVCC_R
5.0 V
VREF_R
DSD
I/F
C25
C26
38
0.1 μF
100 μF
C40
1500 pF
AGND
39
R13
R15
560 Ω + 680 Ω
R19
560 Ω
IOUT_RP
IOUT_RN
1 kΩ
30
29
Current
MCLK
60
2-wire
System
Control
R17
Master
Clock
C43
1500 pF
Rch Out
Single
Segment
I/F
C41
1500 pF
C42
R14
R18
1 kΩ
R16
C44
1500 pF
8
10
16
18
19
20
21
3
4
5, 6
34 to 37 31
33
28
0.1 μF
26
23
0.1 μF
25
1
560 Ω + 680 Ω
R20
0.1 μF 0.1 μF
R3
2.2 kΩ
C33
C34
C31
C32
C29
C30
C27
C28
Rch Out
Differential
DVDDIO
3.3 V
R4
2.2 kΩ
100 μF
100 μF
100 μF
100 μF
CPU
AVCC_R
5.0 V
Figure 1. Typical Application Circuit
〇Product structure : Silicon integrated circuit 〇This product has not designed protection against radioactive rays.
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© 2021 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
TSZ02201-0C1C0E300790-1-2
05.Mar.2021 Rev.001
1/50
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