OPA277
- Ultra-low offset voltage: 10 µV
- Ultra-low drift: ±0.1 µV/°C
- High open-loop gain: 134 dB
- High common-mode rejection: 140 dB
- High power-supply rejection: 130 dB
- Low bias current: 1-nA maximum
- Wide supply range: ±2 V to ±18 V
- Low quiescent current: 800 µA/amplifier
- Single, dual, and quad versions
- Replaces OP-07, OP-77, and OP-177
- For similar performance with ±40-V overvoltage protection, see the OPA2206
The OPAx277 series of precision operational amplifiers replace the industry standard OP-177. The OPAx277 devices offer improved noise, wider output voltage swing, and are twice as fast with half the quiescent current. Features include ultra-low offset voltage and drift, low bias current, high common-mode rejection, and high power supply rejection.
The OPAx277 operate from ±2-V to ±18-V supplies with excellent performance. Unlike most op amps that are specified at only one supply voltage, the OPAx277 series is specified for real-world applications; a single limit applies over the ±5-V (10-V) to ±15-V (30-V) supply range. High performance is maintained as the amplifiers swing to the specified limits. Because the initial offset voltage (±20 µV, maximum) is so low, user adjustment is usually not required. However, the single version (OPA277) provides external trim pins for special applications.
The OPAx277 are easy to use and free from phase inversion and the overload problems found in some other op amps. These devices are unity-gain stable and provide excellent dynamic behavior over a wide range of load conditions. Dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interaction, even when overdriven or overloaded.
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 | OPAx277 High-Precision Operational Amplifiers datasheet (Rev. C) | PDF | HTML | 2023/2/21 | ||
| Application brief | Offset Correction Methods: Laser Trim, e-Trim, and Chopper (Rev. D) | PDF | HTML | 2024/12/5 | |||
| Circuit design | Adjustable reference voltage circuit (Rev. A) | PDF | HTML | 2024/10/9 | |||
| 應用說明 | Impact of Current Noise in CMOS and JFET Amplifiers | PDF | HTML | 2023/5/4 | |||
| 電子書 | The Signal e-book: A compendium of blog posts on op amp design topics | PDF | HTML | 2017/3/28 | |||
| 應用說明 | High-Voltage Signal Conditioning for Low-Voltage ADCs (Rev. B) | PDF | HTML | 2015/5/18 | |||
| 應用說明 | OPA277, OPA2277, OPA4277 EMI Immunity Performance (Rev. A) | 2012/10/31 | ||||
| 類比設計期刊 | 4Q 2011 Issue Analog Applications Journal | 2011/11/9 | ||||
| 類比設計期刊 | Analog linearization of resistance temperature detectors | 2011/11/9 | ||||
| 類比設計期刊 | Wide-input dc/dc modules offer maximum design flexibility | 2006/4/18 | ||||
| 應用說明 | High-Voltage Signal Conditioning for Differential ADCs | 2004/6/14 | ||||
| 應用說明 | Precision Absolute Value Circuits | 2000/10/2 |
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)。
AMP-PDK-EVM — 放大器性能開發套件評估模組
放大器性能開發套件 (PDK) 是一款評估模組 (EVM) 套件，可測試通用運算放大器 (op amp) 參數，並與大多數運算放大器和比較器相容。EVM 套件提供主板和多個插槽式子卡選項，可滿足封裝需求，使工程師能夠快速評估和驗證裝置性能。
AMP-PDK-EVM 套件支援五種最熱門的業界標準封裝，包括：
- D (SOIC-8 和 SOIC-14)
- PW (TSSOP-14)
- DGK (VSSOP-8)
- DBV (SOT23-5 和 SOT23-6)
- DCK (SC70-5 和 SC70-6)
ISO224EVM — ISO224 評估模組
ISO224 評估模組 (EVM) 是適用於 ISO224 的評估平台，其為一 設計用於電壓測量應用的 7-kV 強化型隔離放大器。ISO224EVM 允許使用者探索 ISO224 裝置的所有功能。ISO224EVM 也具有雙極和單極差動轉單端輸出級。
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。
OPAMP-NOISECALC — Noise Calculator
This folder contains three tools to help in understandning and managing noise in cicuits. The included tools are:
- A noise generator tool - This is a Lab View 4-Run Time executable that generates Gaussian white noise, uniform white noise, 1/f noise, short noise, and 60Hz line noise. Temporal data, (...)
TIPD160 — 基於數位可調式 MDAC 的狀態變數濾波器參考設計
此以 MDAC 為基礎的狀態變數濾波器可針對增益、中心/截止頻率與品質因數提供高準確度的數位微調。此電路提供三個獨立的濾波器輸出：低通、帶通和高通，這些輸出可同時存取。 此電路適用於需要準確數位濾波器微調的廣泛應用，範圍涵蓋音訊、工業等領域！
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| PDIP (P) | 8 | Ultra Librarian |
| SOIC (D) | 8 | Ultra Librarian |
| VSON (DRM) | 8 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。