OPA837
- Bandwidth: 105 MHz (AV = 1 V/V)
- Very Low (Trimmed) Supply Current: 600 µA
- Gain Bandwidth Product: 50 MHz
- Slew Rate: 105 V/µs
- Negative Rail Input, Rail-to-Rail Output
- Single-Supply Operating Range: 2.7 V to 5.4 V
- 25°C Input Offset: ±130 µV (Max)
- Input Offset Voltage Drift (DCK Package):
< ±1.6 µV/°C (Maximum) - Input Voltage Noise: 4.7 nV/√Hz (> 100 Hz)
- HD2: –120 dBc at 2 VPP, 100 kHz
- HD3: –145 dBc at 2 VPP, 100 kHz
- Settling Time: 35 ns, 0.5-V Step to 0.1%
- 5-µA Shutdown Current With Fast Recovery From
Shutdown for Power Scaling Applications
The OPA837 and OPA2837 are single- and dual-channel unity-gain stable, voltage-feedback amplifiers that provide among the highest MHz per mW of bandwidth versus power among precision op amps. Using only 600 µA per channel on a single 5-V supply, these 3.0-mW devices deliver 105-MHz bandwidth at a gain of 1 V/V. The very low trimmed offset voltage of ±130 µV (maximum) comes with a typical (±1σ) drift of ±0.4 µV/°C.
Ideally suited to single-ended, successive-approximation register (SAR) analog-to-digital-converter (ADC) driving applications, the OPAx837 provides one of the lowest input spot noise levels at 4.7 nV/√Hz for the 3-mW quiescent power. The very high 50-MHz gain bandwidth product provides the low output impedance to high frequencies required to supply the fast charging currents in SAR ADC driver applications. This low dynamic output impedance is also suitable for reference buffer applications with precision ADCs. The single-channel OPA837 is available in a 6-pin SOT-23 package (that includes a power shutdown feature) and a 5-pin SC70 package whereas the dual-channel OPA2837 is available in an 8-pin VSSOP package and a 10-pin WQFN package.
The OPAx837 is characterized for operation over the a wide temperature range of –40°C to +125°C.
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 | OPAx837 Low-Power, Precision, 105-MHz, Voltage-Feedback Op Amp datasheet (Rev. D) | PDF | HTML | 2018/12/12 | ||
| Application brief | Higher accuracy using an external amplifier in ultrasonic flow measurement | 2019/2/5 | ||||
| 技術文章 | Unique active mux capability combines buffer and switch into one solution | PDF | HTML | 2017/10/10 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
OPA837DBVEVM — 適用於 DBV 封裝的 OPA837 評估模組
OPA837DCKEVM — 適用於 DCK 封裝的 OPA837 評估模組
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
類比工程師的計算機旨在加速類比電路設計工程師定期使用的許多重複計算。此基於 PC 的工具提供圖形介面，列出各種常見計算，從使用回饋電阻器設定運算放大器增益到選擇適當的電路設計元件以穩定類比數位轉換器 (ADC) 驅動緩衝電路。
除了作為獨立工具使用外，此計算機還與類比工程師口袋參考中描述的概念相得益彰。
TIDA-01055 — 適用於高效能 DAQ 系統的 ADC 電壓參考緩衝器最佳化參考設計
TIDA-01565 — 有線 OR 多工器和 PGA 參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-SC70 (DCK) | 5 | Ultra Librarian |
| SOT-23 (DBV) | 6 | Ultra Librarian |