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Rohm公司的BD34352EKV是32位高音质立体声D/A转换器(DAC),取样频率768 kHz,具有ROHM原声质量设计,具有极好的数字性能(SNR为126dB, THD+N为-112 dB(典型值)),适合于高端音频设备. 最喜欢的声音是由切换两种数字FIR滤波器来选择(快速滚降, 慢速滚降).PCM I/F 支持高达768 kHz和DSD I/F支持高达22.4 MHz. 器件支持立体声模式(2路)和单声道模式(1路),可选择4种器件寻址(38h, 3Ah, 3Ch, 3Eh). AVCC电压范围为4.5V到5.5V,DVDD电压范围为1.4V到1.6V, DVDDIO电压范围为 3.0 V到 3.6 V,动态范围为126dB.工作温度为-25 °C 到 +85 °C.主要用在CD/SACD播放器,数字音频播放器(DAP)和USB-DAC与其它.本文介绍了BD34352EKV主要特性和主要指标,框图和典型应用电路, 测量电路图,两路立体声电路图,四路输出和八路输出应用电路,以及评估板BD34352EKV-EVK-001特性和框图,电路图,材料清单和PCB设计图.
High Sound Quality Audio D/A Converters 32-bit, 768 kHz Sampling Stereo Audio D/A Converter
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.
BD34352EKV主要特性:
◼ SNR 126 dB (Typ), THD+N -112 dB
◼ Sampling Frequency 32 kHz to 768 kHz
◼ 2 Kinds of Digital FIR Filters
◼ DSD 2.8 MHz, 5.6 MHz, 11.2 MHz, 22.4 MHz Available
◼ Supports Stereo Mode (2ch) and Mono Mode (1ch)
◼ Selectable 4 Device Addresses (38h, 3Ah, 3Ch, 3Eh)
BD34352EKV 主要指标:
◼ Supply Voltage Range of AVCC 4.5 V to 5.5 V
◼ Supply Voltage Range of DVDD 1.4 V to 1.6 V
◼ Supply Voltage Range of DVDDIO 3.0 V to 3.6 V
◼ SNR 126 dB (Typ)
◼ THD+N -112 dB (Typ)
◼ Dynamic Range 126 dB (Typ)
◼ Operation Temperature Range -25 °C to +85 °C
BD34352EKV封装:
W (Typ) x D (Typ) x H (Max)
HTQFP64BV 12.0 mm x 12.0 mm x 1.0 mm
BD34352EKV应用:
◼ CD/SACD Player
◼ Digital Audio Player (DAP)
◼ USB-DAC and Others
图1. BD34352EKV典型应用电路
图2. BD34352EKV框图
图3. BD34352EKV测量电路图
图4. BD34352EKV两路立体声电路图
图5. BD34352EKV应用电路(I/V转换电路)
图6. BD34352EKV单模式x2应用电路-A
图7. BD34352EKV单模式x2应用电路-B
图8. BD34352EKV应用电路-四路输出
图9. BD34352EKV应用电路-八路输出
评估板BD34352EKV-EVK-001
图10. 评估板BD34352EKV-EVK-001外形图
图11. 评估板BD34352EKV-EVK-001框图(1)
图12. 评估板BD34352EKV-EVK-001外形图(2)
图13. 评估板BD34352EKV-EVK-001电路图
评估板BD34352EKV-EVK-001材料清单:
图14. 评估板BD34352EKV-EVK-001 PCB设计图(1)
图15. 评估板BD34352EKV-EVK-001 PCB设计图(2)
图16. 评估板BD34352EKV-EVK-001 PCB设计图(3)
图17. 评估板BD34352EKV-EVK-001 PCB设计图(4)
图18. 评估板BD34352EKV-EVK-001 PCB设计图(5)
图19. 评估板BD34352EKV-EVK-001 PCB设计图(6)
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