ZHCSIC8B April 2016 – June 2018 LMH0324
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3 Feature Description
- 7.4 Device Functional Modes
- 7.5 LMH0324 Register Map
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機械、封裝和可訂購信息
封裝選項
請參考 PDF 數據表獲取器件具體的封裝圖。
機械數據 (封裝 | 引腳)
- RTW|24
散熱焊盤機械數據 (封裝 | 引腳)
- RTW|24
訂購信息
7.3.7 Output Driver Amplitude and De-Emphasis Control
The VOD_DE control pin selects the output amplitude and de-emphasis settings for both OUT0± and OUT1±. It offers users the capability to select higher output amplitude and de-emphasis level for longer board trace that connects the drivers to their downstream receivers. Driver de-emphasis provides transmitter equalization to reduce the ISI caused by the board trace.
By default, the output driver VOD and de-emphasis settings are configured by the VOD_DE pin logic settings shown in Table 4. These settings can be overridden via register control. Through register programming, the output amplitude and de-emphasis level can be individually set for OUT0± and OUT1±. SPI and SMBus register programming provide a wider range of output amplitude and de-emphasis levels.
Table 4. Recommended VOD_DE Pin and Register Settings for Different FR4 Trace Lengths(1)
| VOD_DE
LEVEL |
VOD REG SETTING
OUT0±: 0x30[5]=1, 0x30[2:0] OUT1±: 0x32[5]=1, 0x32[2:0] |
DEM REG SETTING
OUT0±: 0x31[6]=1, 0x31[2:0] OUT1±: 0x33[6]=1, 0x33[2:0] |
VOD (mVpp)(2) | VODDE (mVpp)(2) | DEM (dB) | FR4 TRACE LENGTH (inches) |
|---|---|---|---|---|---|---|
| H | 0 | 0 | 410 | 410 | 0 | 0 – 1 |
| F | 2 | 2 | 560 | 500 | -0.9 | 2 – 4 |
| R | 3 | 3 | 635 | 480 | -2.4 | 5 – 6 |
| L | 5 | 5 | 810 | 480 | -6.1 | 7 – 8 |
Figure 8. VOD and VODDE Levels