LMH32401-Q1
- AEC-Q100 qualified for automotive
applications:
- Temperature grade 1: –40°C to +125°C, T A
- Integrated programmable gain: 2 kΩ or 20 kΩ
- Performance at gain = 2 kΩ,
C PD = 1 pF:
- Bandwidth: 450 MHz
- Input-referred noise: 250 nA RMS
- Rise and fall time: 0.8 ns
- Performance at gain = 20 kΩ,
C PD = 1 pF:
- Bandwidth: 275 MHz
- Input-referred noise: 49 nA RMS
- Rise and fall time: 1.3 ns
- Integrated ambient light cancellation
- Integrated 100-mA protection clamp
- Integrated output multiplexer
- Wide output swing: 1.5 V PP
- Quiescent current: 30 mA
- Package: 16-pin, wettable-flank VQFN
The LMH32401-Q1 automotive device is a programmable-gain, single-ended-input to differential-output transimpedance amplifier for light detection and ranging (LIDAR) applications.
The LMH32401-Q1 can be configured in a gain of 2 kΩ or 20 kΩ. The LMH32401-Q1 has 1.5 V PP of output swing and is designed to drive a 100‑Ω load.
The LMH32401-Q1 has an integrated 100-mA clamp that protects the amplifier and allows the device to rapidly recover from an overloaded input condition. The LMH32401-Q1 also features an integrated ambient-light cancellation circuit. To save board space, as well as reduce system cost, use this circuit instead of ac coupling between the photodiode (PD) or avalanche photodiode (APD) and the amplifier. The ambient-light cancellation circuit can be disabled in cases where dc coupling is required.
To conserve power when the amplifier is not being used, the LMH32401-Q1 provides a low-power mode using the EN pin. When the amplifier is in low-power mode, the output pins are in a high-impedance state. This feature allows several LMH32401-Q1 amplifiers to be multiplexed to a single ADC with the EN control pin serving as the multiplexer select function.
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技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LMH32401-Q1 Automotive, 450-MHz, Programmable-Gain, Differential-Output Transimpedance Amplifier datasheet (Rev. A) | PDF | HTML | 2023/8/1 |
設計與開發
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LMH32401RGTEVM — 適用可編程增益差動輸出轉阻放大器的 LMH32401 評估模型
LMH32401RGT 評估模組 (EVM) 是適用 RGT 封裝 LMH32401 差動輸出轉阻放大器的開發平台。EVM 配備變壓器，可將輸出轉為 50-Ω 單端連接，以利用標準測試設備輕鬆進行測量，並可選擇轉為全差動 DC 耦合訊號。輸入為 50-Ω 匹配，且預設配置為接收透過 2-kΩ 電阻器轉為電流的電壓輸入，但可重新配置以接收電路板背面選用光二極體偏壓連接的真實電流輸入。
LMH32401RGTEVM 還包括易於使用的跨接器，可用於控制裝置增益、輸入偏壓電流抑制和關機功能。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RGT) | 16 | Ultra Librarian |