PCM1681-Q1
105dB SNR 8 通道音频 DAC（汽车类）
The PCM1681 and are CMOS monolithic integrated circuits which feature an eight-channel 24-bit audio digital-to-analog converter DAC and support circuitry in small 28-lead TSSOP PowerPAD packages. The DACs utilize Burr-Brown"s enhanced multilevel delta-sigma ΔΣ architecture to achieve excellent signal-to-noise performance and a high tolerance to clock jitter.
The PCM1681 and PCM1681-Q1 accept TDM time-division multiplexed format in addition to industry-standard audio data formats with 16- to 24-bit audio data width. Sampling rates up to 200 kHz are supported. The PCM1681 and PCM1681-Q1 provide a sub-set of user-programmable functions through a parallel control port, in addition to a full set of user-programmable functions through a serial control port, SPI, or I2C. The PCM1681 supports –40°C to +85°C for consumer grade applications and the PCM1681-Q1 supports –40°C to +105°C for automotive audio grade systems.
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- Qualified for Automotive Applications: PCM1681-
Q1
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- 24-Bit Resolution
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- Analog Performance:
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- Dynamic Range: 105 dB Typical
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- SNR: 105 dB Typical
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- THD+N: 0.002% Typical
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- Full-Scale Output: 3.75 VPP Typical
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- 4×/8× Oversampling Interpolation Filter:
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- Stop-Band Attenuation: –57 dB
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- Pass-Band Ripple: ±0.015 dB
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- Sampling Frequency: 5 kHz to 200 kHz
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- System Clock: 128 fS, 192 fS, 256 fS, 384 fS,
512 fS, 768 fS, or 1152 fS with Autodetect
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- Zero Flags for Selectable Channel Combinations
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- Flexible Mode Control:
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- SPI™/I2C™ Dual Mode for Serial Port
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- Parallel Hardware Control with 4 Functions
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- User-Programmable Functions in SPI/I2C:
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- Flexible Audio Data Formats:
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- Right-Justified, I2S™, Left-Justified, TDM,
DSP
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- 16- and 24-Bit Audio Data
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- Digital Attenuation: Mode Selectable
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- 0 dB to –63 dB, 0.5 dB/step
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- 0 dB to –100 dB, 1 dB/step
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- Soft Mute
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- Digital De-Emphasis
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- Digital Filter Roll-Off: Sharp or Slow
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- Oversampling Mode
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- User-Programmable Functions in H/W:
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- Flexible Audio Data Formats:
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- Right-Justified, I2S, Left-Justified, TDM
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- Soft Mute
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- Digital De-Emphasis
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- Oversampling Mode
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- Power Supply Voltage: 5-V Analog, 3.3-V Digital
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- Package: 28-Lead HTSSOP PowerPAD
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- Operation Temperature Range:
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- –40°C to 85°C for Consumer Grade
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- –40°C to 105°C for Automotive Audio Grade
