LMP7721
- Unless Otherwise Noted, Typical Values at TA =
25°C, VS = 5 V. - Input Bias Current (VCM = 1 V)
- Maximum at 25°C ±20 fA
- Maximum at 85°C ±900 fA
- Offset Voltage ±26 µV
- Offset Voltage Drift – 1.5 µV/°C
- DC Open-Loop Gain 120 dB
- DC CMRR 100 dB
- Input Voltage Noise (at f = 1 kHz) 6.5 nV/√Hz
- THD 0.0007%
- Supply Current 1.3 mA
- GBW 17 MHz
- Slew Rate (Falling Edge) 12.76 V/µs
- Supply Voltage 1.8 V to 5.5 V
- Operating Temperature Range –40°C to 125°C
- 8-Pin SOIC
The LMP7721 is the industry’s lowest specified input bias current precision amplifier. The ultra-low input bias current is 3 fA, with a specified limit of ±20 fA at 25°C and ±900 fA at 85°C. This is achieved with the latest patent-pending technology of input bias current cancellation amplifier circuitry. This technology also maintains the ultra-low input bias current over the entire input common-mode voltage range of the amplifier.
Other outstanding features, such as low voltage noise (6.5 nV/√Hz), low DC-offset voltage (±150 µV maximum at 25°C) and low-offset voltage temperature coefficient (–1.5 µV/°C), improve system sensitivity and accuracy in high-precision applications. With a supply voltage range of 1.8 V to 5.5 V, the LMP7721 is the ideal choice for battery-operated, portable applications. The LMP7721 is part of the LMP precision amplifier family.
As part of Texas Instruments’ PowerWise™ products, the LMP7721 provides the remarkably wide-gain bandwidth product (GBW) of 17 MHz while consuming only 1.3 mA of current. This wide GBW along with the high open-loop gain of 120 dB enables accurate signal conditioning. With these specifications, the LMP7721 has the performance to excel in a wide variety of applications such as electrochemical cell amplifiers and sensor interface circuits.
The LMP7721 is offered in an 8-pin SOIC package with a special pinout that isolates the amplifier’s input from the power supply and output pins. With proper board layout techniques, the unique pinout of the LMP7721 will prevent PCB leakage current from reaching the input pins. Thus system error will be further reduced.
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 | LMP7721 3-Femtoampere Input Bias Current Precision Amplifier datasheet (Rev. E) | PDF | HTML | 2014/12/15 | ||
| Circuit design | Low-input bias-current front end SAR ADC circuit (Rev. B) | PDF | HTML | 2024/9/24 | |||
| Circuit design | Photodiode Amplifier Circuit (Rev. B) | PDF | HTML | 2024/5/2 | |||
| 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 | AN-1852 Designing With pH Electrodes (Rev. A) | 2013/5/1 | ||||
| EVM User's guide | AN-1796 LMP7721 Evaluation Board (Rev. C) | 2013/5/1 | ||||
| 應用說明 | AN-1798 Designing with Electro-Chemical Sensors (Rev. C) | 2013/5/1 |
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)
Simulation for Photodiode Amplifier TINA-TI Reference Design
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, (...)
SBOC517 — Simulation for Photodiode Amplifier
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOIC (D) | 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。