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.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | 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 | ||
| e북 | The Signal e-book: A compendium of blog posts on op amp design topics | PDF | HTML | 2017. 3. 28 | ||
| 애플리케이션 노트 | 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 | |||
| 애플리케이션 노트 | AN-1798 Designing with Electro-Chemical Sensors (Rev. C) | 2013. 5. 1 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
AMP-PDK-EVM — 증폭기 성능 개발 키트 평가 모듈
증폭기 성능 개발 키트(PDK)는 일반적인 연산 증폭기(OP 앰프) 매개 변수를 테스트할 수 있는 평가 모듈(EVM) 키트입니다. 대부분의 연산 증폭기 및 콤퍼레이터와 호환됩니다. EVM 키트는 패키지 요구 사항에 맞는 여러 소켓형 부속 카드 옵션이 있는 메인 보드를 제공하여 엔지니어가 디바이스 성능을 신속하게 평가하고 확인할 수 있습니다.
AMP-PDK-EVM 키트는 다음을 포함해 가장 널리 사용되는 5개의 업계 표준 패키지를 지원합니다.
- D(SOIC-8 및 SOIC-14)
- PW(TSSOP-14)
- DGK(VSSOP-8)
- (...)
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
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.