ZHCSDN0E March 1999 – February 2017 LMP8480 , LMP8481
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 修訂歷史記錄
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagrams
- 8.3
Feature Description
- 8.3.1 Basic Connections
- 8.3.2 Selection of the Sense Resistor
- 8.3.3 Using PCB Traces as Sense Resistors
- 8.3.4 VREFA and VREFB Pins (LMP8481 Only)
- 8.3.5 Reference Input Voltage Limits (LMP8481 Only)
- 8.3.6 Low-Side Current Sensing
- 8.3.7 Input Series Resistance
- 8.3.8 Minimum Output Voltage
- 8.3.9 Swinging Output Below Ground
- 8.3.10 Maximum Output Voltage
- 8.4 Device Functional Modes
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文檔支持
- 13機械、封裝和可訂購信息
封裝選項
機械數(shù)據(jù) (封裝 | 引腳)
- DGK|8
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
訂購信息
1 特性
3 說明
LMP8480 和 LMP8481 是精密的高側(cè)電流感測放大器，可將作用于電流感測電阻兩端較小的差分電壓放大為高輸入共模電壓。這些放大器專為雙向 (LMP8481) 或單向 (LMP8480) 電流 應(yīng)用而設(shè)計， 并支持共模電壓范圍為 4V 至 76V 且?guī)挒?270kHz 的輸入信號。由于工作電源電壓范圍與輸入共模電壓范圍之間有重疊，因此 LMP848x 可由同一受監(jiān)視的電壓進行供電。該優(yōu)勢使得我們無需再將中間電源電壓路由至電流正受監(jiān)視的負(fù)載點，從而減少組件數(shù)并節(jié)省板空間。
LMP848x 系列包含 20、60 和 100 等各種固定增益，適用于在各種溫度下都需實現(xiàn)高精度的 應(yīng)用 。低輸入偏移電壓允許在不影響系統(tǒng)誤差的情況下使用較小的感應(yīng)電阻器。憑借 –40°C 至 125°C 的寬工作溫度范圍，LMP848x 成為汽車、電信、工業(yè)和消費類 應(yīng)用的理想之選。LMP8480 和 LMP8481 是 MAX4080 和 MAX4081 的引腳到引腳替代產(chǎn)品，可提升偏移電壓、擴大基準(zhǔn)調(diào)節(jié)范圍并提高輸出驅(qū)動能力。LMP8480 和 LMP8481 采用 8 引腳 VSSOP 封裝。
器件信息(1)
| 器件型號 | 封裝 | 封裝尺寸（標(biāo)稱值） |
|---|---|---|
| LMP8480 | VSSOP (8) | 3.00mm x 3.00mm |
| LMP8481 | VSSOP (8) | 3.00mm x 3.00mm |
- 如需了解所有可用封裝，請參閱數(shù)據(jù)表末尾的可訂購產(chǎn)品附錄。
4 修訂歷史記錄
Changes from D Revision (April 2016) to E Revision
- Deleted 刪除了最后一個 特性 項目Go
- Deleted LMP8480-H row from Device Comparison TableGo
- Changed REFA to REFB and REFB to REFA for pins 6 and 7, respectively, in Pin Functions tableGo
- Deleted NCQ column from Thermal Information tableGo
- Changed bidirectional to unidirectional is description of Figure 22 in Basic Connections section Go
Changes from C Revision (September 2015) to D Revision
- 更改了典型應(yīng)用原理圖：調(diào)換了 RSN 和 RSP 標(biāo)簽Go
- Changed conditions of Electrical Characteristics table Go
- Added unit to ROUT parameter in Electrical Characteristics table Go
- Changed first paragraph of Overview section Go
Changes from B Revision (December 2014) to C Revision
- Deleted 刪除了 LMP8480 和 LMP8481 的 WSON 封裝選項Go
- Deleted -F version (50x gain) for LMP8480 and LMP8481Go
- Deleted WSON package options for LMP8480 and LMP8481 Go
Changes from A Revision (August 2012) to B Revision
- Added 引腳配置和功能部分，ESD 額定值表，特性 說明 部分、器件功能模式、應(yīng)用和實施部分、電源相關(guān)建議部分、布局部分、器件和文檔支持部分以及機械、封裝和可訂購信息部分Go