ZHCSPD9A April 2022 – September 2022 PCM1822-Q1
PRODUCTION DATA
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Hardware Control
- 8.3.2 Audio Serial Interfaces
- 8.3.3 Phase-Locked Loop (PLL) and Clock Generation
- 8.3.4 Input Channel Configurations
- 8.3.5 Reference Voltage
- 8.3.6
Signal-Chain Processing
- 8.3.6.1 Digital High-Pass Filter
- 8.3.6.2
Configurable Digital Decimation Filters
- 8.3.6.2.1
Linear Phase Filters
- 8.3.6.2.1.1 Sampling Rate: 8 kHz or 7.35 kHz
- 8.3.6.2.1.2 Sampling Rate: 16 kHz or 14.7 kHz
- 8.3.6.2.1.3 Sampling Rate: 24 kHz or 22.05 kHz
- 8.3.6.2.1.4 Sampling Rate: 32 kHz or 29.4 kHz
- 8.3.6.2.1.5 Sampling Rate: 48 kHz or 44.1 kHz
- 8.3.6.2.1.6 Sampling Rate: 96 kHz or 88.2 kHz
- 8.3.6.2.1.7 Sampling Rate: 192 kHz or 176.4 kHz
- 8.3.6.2.2 Low-Latency Filters
- 8.3.6.2.1
Linear Phase Filters
- 8.3.7 Dynamic Range Enhancer (DRE)
- 8.4 Device Functional Modes
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
10 Power Supply Recommendations
The power-supply sequence between the IOVDD and AVDD rails can be applied in any order. However, do not provide any clocks until the IOVDD and AVDD supply voltage settles to a stable and supported operating voltage range. Provide the clocks (FSYNC and BCLK) only when all hardware control pins (MSZ, MD0, MD1, FMT0, and FMT1) are driven to the voltage level for the device desired mode of operation.
For the supply power-up requirement, t1 and t2 must be at least 100 μs. For the supply power-down requirement, t3 and t4 must be at least 10 ms. This timing (as shown in Figure 10-1) allows the device to ramp down the volume on the record data, power down the analog and digital blocks, and put the device into hardware shutdown mode.
Figure 10-1 Power-Supply Sequencing
Requirement Timing DiagramMake sure that the supply ramp rate is slower than 1 V/μs and that the wait time between a power-down and a power-up event is at least 100 ms.