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ES9822PRO 数据表(PDF) 9 Page - ESS Technology,Inc

部件名 ES9822PRO
功能描述  32-bit High-Performance 2-Channel ADC
PDF  126 Pages
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制造商  ESS [ESS Technology,Inc]
网页  http://www.esstech.com
标志 ESS - ESS Technology,Inc

ES9822PRO 数据表(HTML) 9 Page - ESS Technology,Inc

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ESS TECHNOLOGY, INC. 109 Bonaventura Drive, San Jose, CA 95134, USA Tel (408) 643-8800 WWW.ESSTECH.COM
9
ES9822 PRO Product Datasheet
Digital Features
Digital Signal Path
SABRE ADC DIGITAL PATH (2 CHANNEL)
-32
6
Distortion
Compensation
DC
Block
IIR
128xFS
IIR
8xFS
DFIR
1xFS
ASP
FORMATTING
TDM/I2S/
DSD/SPDIF
VOLUME
CONTROL
x1, x2, x4
GAIN
CLIP
DETECTION
32
32
32
32
32
32
32
ADC
DATA
I2S Decoder
Programmable Delay
Figure 3 - Digital Signal Path
THD Compensation 3
THD Compensation minimizes the non-linearities of the ADCs. The ES9822 PRO can help compensate for system second and third harmonic
distortion.
THD compensation can be enabled or bypassed by setting ADCx_ENABLE_THD_COMP for each channel
THD Compensation Enable Registers
•
Register 102 [0]: ADC1_ENABLE_THD_COMP
•
Register 119 [0]: ADC2_ENABLE_THD_COMP
•
Register 136 [0]: ADC3_ENABLE_THD_COMP
•
Register 153 [0]: ADC4_ENABLE_THD_COMP
For best results, compensation coefficients should be tuned for each device in-situ.
DC Block
The ES9842 has a built in DC blocking filter. Please ask for an application note that is available showing an improved filter using the built in ASPs.
Volume Control
This volume control is intended for use during audio playback. Each channel can be digitally attenuated from 0dB to –84dB in 0.5dB steps. The
attenuation circuit automatically uses micro-stepping between 0.5dB register settings so that no switching noise occurs during the volume control
transition. When a new volume level is set, the attenuation circuit will ramp softly to the new level. Each 0.5dB step takes up to 64 intermediate steps
depending on the CHx VOLUME RATE setting.
Volume Level Configuration Registers
•
Register 109-110: ADC CH1 VOLUME
•
Register 126-127: ADC CH2 VOLUME
Volume Rate Configuration Registers
•
Register 111: ADC CH1 VOLUME RATE
•
Register 128: ADC CH2 VOLUME RATE
3
For more information on using THD Compensation, please reference the THD Compensation Application Note. Available from your local FAE upon
request.



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