LT1999 - 高电压、双向电流检测放大器
LT®1999 是一款高速、精准的电流检测放大器，专为在一个宽共模范围内监视双向电流而设计。LT1999 可提供三种增益选项：10V/V、20V/V 和 50V/V。 LT1999 通过一个外部阻性分路器来检测电流，并产生一个输出电压，可指示检测电流的数值和方向。输出电压以位于电源电压与地之间的中间电压为参考电位，或者也可以采用一个外部电压来设定参考电平。LT1999 具有一个 2MHz 带宽和一个 –5V 至 80V 的共模输入范围，因而适合于监视 H 桥电机控制器中的电流、开关电源、螺线管电流、以及电池充电电流 (从满充电至电量耗尽)。 LT1999 采用一个独立的 5V 工作电源，并吸收 1.55mA 电流。该器件提供了一种停机模式以最大限度地降低功耗。
LT1999 可提供 8 引脚 SOP、8 引脚 MSOP (原有引脚) 或专为 FMEA 的 8 引脚选项。
特点
典型应用  | 应用
封装信息   |
| 器件型号 | 封装 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) * |
|---|---|---|---|---|
| LT1999CMS8-10#PBF | MS-8 | C | $2.69 | $1.92 |
| LT1999CMS8-10#TRPBF | MS-8 | C | $2.75 | $1.98 |
| LT1999CMS8-10F#PBF | MS-8 | C | $2.69 | $1.92 |
| LT1999CMS8-10F#TRPBF | MS-8 | C | $1.98 | |
| LT1999CMS8-20#PBF | MS-8 | C | $2.69 | $1.93 |
| LT1999CMS8-20#TRPBF | MS-8 | C | $2.75 | $1.98 |
| LT1999CMS8-20F#PBF | MS-8 | C | $2.69 | $1.92 |
| LT1999CMS8-20F#TRPBF | MS-8 | C | $1.98 | |
| LT1999CMS8-50#PBF | MS-8 | C | $2.69 | $1.92 |
| LT1999CMS8-50#TRPBF | MS-8 | C | $2.75 | $1.98 |
| LT1999CMS8-50F#PBF | MS-8 | C | $2.69 | $1.92 |
| LT1999CMS8-50F#TRPBF | MS-8 | C | $1.98 | |
| LT1999CS8-10#PBF | SO-8 | C | $2.69 | $1.92 |
| LT1999CS8-10#TRPBF | SO-8 | C | $2.75 | $1.98 |
| LT1999CS8-20#PBF | SO-8 | C | $2.69 | $1.92 |
| LT1999CS8-20#TRPBF | SO-8 | C | $2.75 | $1.98 |
| LT1999CS8-50#PBF | SO-8 | C | $2.69 | $1.92 |
| LT1999CS8-50#TRPBF | SO-8 | C | $2.75 | $1.98 |
| LT1999HMS8-10#PBF | MS-8 | H | $3.52 | $2.51 |
| LT1999HMS8-10#TRPBF | MS-8 | H | $3.58 | $2.57 |
| LT1999HMS8-10F#PBF | MS-8 | H | $3.52 | $2.51 |
| LT1999HMS8-10F#TRPBF | MS-8 | H | $2.57 | |
| LT1999HMS8-20#PBF | MS-8 | H | $3.52 | $2.51 |
| LT1999HMS8-20#TRPBF | MS-8 | H | $3.58 | $2.57 |
| LT1999HMS8-20F#PBF | MS-8 | H | $3.52 | $2.51 |
| LT1999HMS8-20F#TRPBF | MS-8 | H | $2.57 | |
| LT1999HMS8-50#PBF | MS-8 | H | $3.52 | $2.51 |
| LT1999HMS8-50#TRPBF | MS-8 | H | $3.58 | $2.57 |
| LT1999HMS8-50F#PBF | MS-8 | H | $3.52 | $2.51 |
| LT1999HMS8-50F#TRPBF | MS-8 | H | $2.57 | |
| LT1999HS8-10#PBF | SO-8 | H | $3.52 | $2.51 |
| LT1999HS8-10#TRPBF | SO-8 | H | $3.58 | $2.57 |
| LT1999HS8-20#PBF | SO-8 | H | $3.52 | $2.51 |
| LT1999HS8-20#TRPBF | SO-8 | H | $3.58 | $2.57 |
| LT1999HS8-50#PBF | SO-8 | H | $3.52 | $2.51 |
| LT1999HS8-50#TRPBF | SO-8 | H | $3.58 | $2.57 |
| LT1999IMS8-10#PBF | MS-8 | I | $3.02 | $2.15 |
| LT1999IMS8-10#TRPBF | MS-8 | I | $3.08 | $2.21 |
| LT1999IMS8-10F#PBF | MS-8 | I | $3.02 | $2.15 |
| LT1999IMS8-10F#TRPBF | MS-8 | I | $2.21 | |
| LT1999IMS8-20#PBF | MS-8 | I | $3.02 | $2.15 |
| LT1999IMS8-20#TRPBF | MS-8 | I | $3.08 | $2.21 |
| LT1999IMS8-20F#PBF | MS-8 | I | $3.02 | $2.15 |
| LT1999IMS8-20F#TRPBF | MS-8 | I | $2.21 | |
| LT1999IMS8-50#PBF | MS-8 | I | $3.02 | $2.15 |
| LT1999IMS8-50#TRPBF | MS-8 | I | $3.08 | $2.21 |
| LT1999IMS8-50F#PBF | MS-8 | I | $3.02 | $2.15 |
| LT1999IMS8-50F#TRPBF | MS-8 | I | $2.21 | |
| LT1999IS8-10#PBF | SO-8 | I | $3.02 | $2.15 |
| LT1999IS8-10#TRPBF | SO-8 | I | $3.08 | $2.21 |
| LT1999IS8-20#PBF | SO-8 | I | $3.02 | $2.15 |
| LT1999IS8-20#TRPBF | SO-8 | I | $3.08 | $2.21 |
| LT1999IS8-50#PBF | SO-8 | I | $3.02 | $2.15 |
| LT1999IS8-50#TRPBF | SO-8 | I | $3.08 | $2.21 |
| LT1999MPMS8-10#PBF | MS-8 | MP | $6.83 | $4.88 |
| LT1999MPMS8-10#TRPBF | MS-8 | MP | $6.89 | $4.94 |
| LT1999MPMS8-10F#PBF | MS-8 | MP | $6.83 | $4.88 |
| LT1999MPMS8-10F#TRPBF | MS-8 | MP | $4.94 | |
| LT1999MPMS8-20#PBF | MS-8 | MP | $6.83 | $4.88 |
| LT1999MPMS8-20#TRPBF | MS-8 | MP | $6.89 | $4.94 |
| LT1999MPMS8-20F#PBF | MS-8 | MP | $6.83 | $4.88 |
| LT1999MPMS8-20F#TRPBF | MS-8 | MP | $4.94 | |
| LT1999MPMS8-50#PBF | MS-8 | MP | $6.83 | $4.88 |
| LT1999MPMS8-50#TRPBF | MS-8 | MP | $6.89 | $4.94 |
| LT1999MPMS8-50F#PBF | MS-8 | MP | $6.83 | $4.88 |
| LT1999MPMS8-50F#TRPBF | MS-8 | MP | $4.94 | |
| LT1999MPS8-10#PBF | SO-8 | MP | $6.83 | $4.88 |
| LT1999MPS8-10#TRPBF | SO-8 | MP | $6.89 | $4.94 |
| LT1999MPS8-20#PBF | SO-8 | MP | $6.83 | $4.88 |
| LT1999MPS8-20#TRPBF | SO-8 | MP | $6.89 | $4.94 |
| LT1999MPS8-50#PBF | SO-8 | MP | $6.83 | $4.88 |
| LT1999MPS8-50#TRPBF | SO-8 | MP | $6.89 | $4.94 |
演示电路板
| 器件型号 | 描述 | 价格 |
|---|---|---|
| DC1698A-A | LT1999-10 (MS8) Demoboard | $50.00 |
| DC1698A-B | LT1999-20 (MS8) Demoboard | $50.00 |
| DC1698A-C | LT1999-50 (MS8) Demoboard | $50.00 |
数据表可靠性数据产品选择卡产品新闻发布CAD 符号LTspice | 相关产品 |
- 双向电流检测放大器工作在 -5V 至 80V，并且在 100kHz 时具 80dB CMRR
- R515 Reliability Data
- Precision High Side Current Sense Amplifiers
- Bidirectional Current Sense Amplifier Operates from -5V to 80V with 80db of CMRR at 100 kHz
- LT1999 Footprints and Symbols
- LT1999-20 Demo Circuit - High Voltage Bidirectional Current Sense (-5-80V Input with Av = 20)
