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title: A316-HF-DAC-V1 USB HiFi Audio Decoder Evaluation Board User Manual
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--8<-- "common/phaten_xmos_support_img.md"
# Low Power Consumption Testing Guide
## 1. Test Point Connection Instructions
### 1.1 Test Point Locations
1. USB-5V
2. A316 - 3.3V
3. A316 - 1.8V
4. A316 - 0.9V
![Test Point Location Diagram](/assets/images/evb/a316_hf_dac/Low_power_Consumption_Testing_Guide/低功耗指导1.PNG)
## 2. Testing Method Instructions
### 2.1 Testing Steps (Using USB-5V as an example)
1. Disconnect the test point to be measured
2. Connect USB - TYPE-C power supply
3. Connect ammeter in series
4. Read the measured current
![Testing Method Diagram](/assets/images/evb/a316_hf_dac/Low_power_Consumption_Testing_Guide/低功耗指导2.PNG)
## 3. Test Results
### 3.1 Power Consumption Test Data
!!! info "XU316 USB Low Power HiFi Decoder Power Consumption Comparison Results"
<div class="sticky-column" markdown>
| Chip Type | DSD 512 | PCM 768KHz | PCM 384KHz | PCM 192KHz |
|---------|---------|------------|------------|------------|
| **Low Power Chip** | 113 mW | 146 mW | 128 mW | 123 mW |
| **Standard Power Chip** | 227 mW | 232 mW | 227 mW | 222 mW |
| **Power Saved** | 114 mW | 86 mW | 99 mW | 99 mW |
| **Power Saving %** |50.22% | 37.07% | 43.61% | 44.59% |
</div>

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## 1. USB INPUT 1KHz RCAOUT Test Specifications
### THD+N Ratio
![USB INPUT 1KHz RCAOUT THD+N Ratio](../../../../assets/images/hifi_audio/pbax316_90108mv1_usb_thdn.png)
![USB INPUT 1KHz RCAOUT THD+N Ratio](/assets/images/hifi_audio/pbax316_90108mv1_usb_thdn.png)
### Frequency Response
![USB INPUT 1KHz RCAOUT Frequency Response](../../../../assets/images/hifi_audio/pbax316_90108mv1_usb_fre_res.png)
![USB INPUT 1KHz RCAOUT Frequency Response](/assets/images/hifi_audio/pbax316_90108mv1_usb_fre_res.png)
### THD+N Level
![USB INPUT 1KHz RCAOUT THD+N Level](../../../../assets/images/hifi_audio/pbax316_90108mv1_usb_thdn_level.png)
![USB INPUT 1KHz RCAOUT THD+N Level](/assets/images/hifi_audio/pbax316_90108mv1_usb_thdn_level.png)
### SNR
![USB INPUT 1KHz RCAOUT SIGNAL-NOISE RATIO](../../../../assets/images/hifi_audio/pbax316_90108mv1_usb_snr.png)