INA351
- Designed for size, cost, and power conscious applications
- Selectable gain options with integrated reference
buffer
- G = 10 or G = 20 (INA351ABS)
- G = 30 or G = 50 (INA351CDS)
- Space saving ultra-small package options
- 10-pin X2QFN (RUG) – 3mm2
- 8-pin WSON (DSG) – 4mm2
- 8-pin SOT23-THN (DDF) – 4.64mm2
- Optimized performance for 10-bit to 14-bit
systems
- CMRR: 95dB (typical) across all gains
- Offset voltage: 0.2mV (typical) across all gains
- Gain error (typical):
- 0.015% for G = 10, G = 50
- 0.020% for G = 20, G = 30
- Bandwidth: 100kHz for G = 10 (typical)
- Drives 500pF with less than 20% overshoot (typical)
- Optimized quiescent current: 110µA (typical)
- Shutdown option for power conscious applications
- Supply range: 1.8V (±0.9V) to 5.5V (±2.75V)
- Specified temperature range: –40°C to 125°C
The INA351 is a selectable-gain instrumentation amplifier with integrated reference buffer that offers four gain options across the INA351ABS and INA351CDS variants available in small packages. The INA351ABS has gain options of 10 or 20 and the INA351CDS has gain options of 30 or 50. These gain options can be selected by toggling the gain select (GS) pin. The INA351 is an excellent choice for bridge-type sensing and for differential to single-ended conversion applications.
Built with precision matched integrated resistors, the INA351 saves on BOM costs, pick-and-place machine handling costs, and board space by removing the need for precise or closely-matched external resistors. The INA351 can interface directly to low-speed, 10-bit to 14-bit, analog-to-digital converters (ADCs) and is an excellent choice for replacing discrete implementation of instrumentation amplifiers built with commodity amplifiers and discrete resistors.
Designed with the three-amplifier architecture, the INA351 is optimized for delivering performance. The device achieves 86dB of minimum CMRR and an accurate 0.1% of maximum gain error, along with 1.3mV of maximum offset across all gain options, while consuming just 135µA of maximum quiescent current. The INA351 has an integrated shutdown option to turn off the amplifier when idle for additional power savings in battery-powered applications.
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 | INA351 Cost and Size Optimized, Low Power, 1.8V to 5.5V Selectable Gain Instrumentation Amplifier with Integrated Reference Buffer datasheet (Rev. D) | PDF | HTML | 2024/11/19 | ||
| Product overview | Small-Size INA35x Versus Discrete Instrumentation Amps (Rev. A) | PDF | HTML | 2023/1/31 | |||
| Product overview | Bridge Sensor Solution (Rev. A) | PDF | HTML | 2023/1/27 |
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)。
INA-DDF-EVM — 適用採 DDF 封裝之儀器放大器的評估模組
SMALL-AMP-DIP-EVM — 適用於採用小尺寸封裝之運算放大器的評估模組
SMALL-AMP-DIP-EVM 提供快速簡易方式，與許多業界標準小型封裝進行介接，因而加速小型封裝運算放大器原型設計。SMALL-AMP-DIP-EVM 支援八個小型封裝選項，包括 DPW-5 (X2SON)、DSG-8 (WSON)、DCN-8 (SOT)、DDF-8 (SOT)、RUG-10 (X2QFN)、RUC-14 (X2QFN)、RGY-14 (VQFN) 和 RTE-16 (WQFN)。
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。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WSON (DSG) | 8 | Ultra Librarian |
| SOT-23-THN (DDF) | 8 | Ultra Librarian |
| X2QFN (RUG) | 10 | Ultra Librarian |