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© 2020 ROHM Co., Ltd.
No. 63UG069E Rev.003
APR.2021
User's Guide
32-bit, 768 kHz Sampling Stereo Audio D/A Converter
BD34301EKV Evaluation Board
IC Introduction
BD34301EKV is a 32-bit Stereo Audio D/A Converter with ROHM original sound quality design, realizing excellent performance (SNR: 130 dB
(Typ), THD+N: -115 dB (Typ))
*1
suitable for high-end audio. Different type sound is realized by selecting 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.
*1 BD34301EKV-EVK is tuned for listening evaluation. Electrical performance, External CR values are different from BD34301EKV Datasheet. （SNR: 125 dB (Typ) at Balance Output)
BD34301EKV Block Diagram
Recommended Operating Conditions
Item
Symbol
Ratings
Unit
Power Supply Voltage
AVCC
*1
4.5 to 5.5
V
DVDDIO
3.0 to 3.6
DVDD
1.4 to 1.6
Operating Temperature
Topr
-25 to +85
°C
*1 AVCC, AVCC_R, AVCC_L in Block Diagram.
Package
HTQFP64BV (64 pin, 0.5 mm pitch)
W(Typ) D(Typ) H(Max)
12.0 mm x 12.0 mm x 1.00 mm
IOUT_LP
IOUT_LN
IOUT_RP
IOUT_RN
AVCC
VREF_L
VREF_R
AGND
BCLK
LRCLK/DSD2
DIN/DSD1
MCLK /
DSDCLK
Lch Output
(Differential)
PCM
I/F
Current
Segment
VREF
2wire
I/F
Master
Clock
System
Control
BCLK
DIN
LRCLK
Over
Sampling
Digital
Filter
ΔΣ
Modulator
Audio
Function
Control
DSD
I/F
DSDCLK
RESETB
ADDR2
SDA
SCL
AGND3_R
AVCC_L
AVCC3_L
AVCC2_L
AVCC1_L
AGND3_L
AGND2_L
AGND1_L
DVDD1
DGND1
DVDD2
DGND2
DVDDIO1
DVDDIO2
Rch Output
(Differential)
Current
Segment
AGND2_R
AGND1_R
AVCC1_R
AVCC2_R
AVCC3_R
AVCC_R
ADDR1
EXT_RES_R
EXT_RES_L
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© 2020 ROHM Co., Ltd.
No. 63UG069E Rev.003
APR.2021
User's Guide
BD34301EKV-EVK
Evaluation Board Block Diagram
Evaluation Board
External
PCM/DSD Input
Coaxial
SPDIF Input
AKM
AK4118AEQ
MCU
(16 modes setting)
32-bit 768 kHz Sampling Stereo Audio D/A Converter
BD34301EKV
Rotary Switch
(For Mode selection)
Execution
Switch
Select
AK4118A
CN14
CN13
Reset
Switch
Audio Regulator
BD37201NUX
GND
+15V
Power Supply
GND
+15V
Power Supply
-15V
Power Supply
Single Output
Lch (RCA)
Balance Output
Lch (XLR)
Single Output
Rch (RCA)
Balance Output
Rch (XLR)
CN45
CN44
CN42
CN43
SW6
XLR Polarity
Switch
SW5
Regulator Status LED (ACTIVE: Lighting)
MCU Status LED (BUSY: Blinking)
2-wire I/F
Device Address "38h"
ROHM
32-bit Stereo Audio DAC
BD34301EKV
Balance - Rch
(XLR)
Lch
GND
Single - Rch
(RCA)
Single - Lch
(RCA)
Balance - Lch
(XLR)
DATA
LRCLK
BCLK
MCLK
External
Input
SCL
SDA
AKM
AK4118AEQ
Coaxial
Input
MCU
Rch
+15V
GND
(AGND/AGND1/AGND2/AGND3)
(DGND1/DGND2)
+5 V
(AVCC
/AVCC1)
+15V -15VGND
-15V
(For OP-amp)
+15V
(For OP-amp)
CN14
CN13
RESET
RESET
Switch
Execution
Switch
LM317SLM317S
+5 V
(AVCC2
/AVCC3)
+1.5 V
(DVDD)
ROHM
BD37201NUX
ROHM
BD37201NUX
LM317S
IOUT_LN
*1
IOUT_LP
*1
IOUT_RN
IOUT_RP
NOP
*2
*1 Signal Polarity changed by Audio Output Polarity register 14h.
*2 Op-amp for Balanced Ouput is not implemented. Please prepare Op-amp for BAL Output.
*3 IV Conversion Amp
1
2
3
1
2
3
SW6
SW5
CN42
CN43
CN45
CN44
NOP
*2
NOP
*2
NOP
*2
*3
*3
*3
*3
+3.3 V
(DVDDIO)