4 ADC，具有锁相环， 192千赫， 24位编解码器 4 ADC with PLL, 192 kHz, 24-Bit Codec
Product Details
The is a high performance, single-chip ADC that provides four analog-to-digital converters ADCs with differential inputs using the Analog Devices, Inc. patented multibit sigma-delta Σ-Δ architecture. An SPI port is included, allowing a microcontroller to enable mutes and adjust many other parameters. The AD1974 operates from 3.3 V digital and analog supplies. The AD1974 is available in a single-ended output 48-lead LQFP.
The AD1974 is designed for low EMI. This consideration is apparent in both the system and circuit design architectures. By using the on-board phase-locked loop PLL to derive the master clock from the LR clock or from an external crystal, the AD1974 eliminates the need for a separate high frequency master clock and can also be used with a suppressed bit clock. The ADCs are designed using the latest continuous time architectures from Analog Devices to further minimize EMI. By using 3.3 V supplies, power consumption is minimized, further reducing emissions.
**Applications**
* Automotive audio systems
* Home Theater Systems
* Set-top boxes
* Digital audio effects processors
### Features and Benefits
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- Phase-locked loop generated or direct master clock
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- Low EMI design
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- 107 dB dynamic range and SNR
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- −94 dB THD + N
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- Single 3.3 V supply
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- Tolerance for 5 V logic inputs
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- Supports 24 bits and 8 kHz to 192 kHz sample rates
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- Differential ADC input
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- SPI®-controllable for flexibility
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- Software-controllable clickless mute
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- Software power-down
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- See data sheet for additional features
