OPA818
- High speed:
- Gain-bandwidth product (GBWP): 2.7GHz
- Bandwidth (G = 7V/V): 765MHz
- Large-signal bandwidth (2VPP): 400MHz
- Slew rate: 1400V/µs
- Decompensated gain: 7V/V stable
- Low noise:
- Input voltage noise: 2.2nV/√Hz
- Input current noise: 3fA/√Hz (f = 10kHz)
- Input bias current: 4pA (typical)
- Low input capacitance:
- Common-mode: 1.9pF
- Differential mode: 0.5pF
- Low distortion (G = 7V/V,
RL = 1kΩ, VO = 2VPP):
- HD2, HD3 at 1MHz: –104dBc, –108dBc
- HD2, HD3 at 50MHz: –57dBc, –72dBc
- Wide supply range: 6V to 13V
- Output swing: 8VPP (VS = 10V)
- Supply current: 27.7mA
- Shutdown supply current: 27µA
- Performance upgrade to OPA657
The OPA818 is a decompensated, voltage-feedback operational amplifier for high-speed and wide-dynamic-range applications. The OPA818 has a low-noise JFET input stage that combines high gain-bandwidth with a wide supply range from 6V to 13V. The fast slew rate (1400V/µs) provides high, large-signal bandwidth and low distortion. This amplifier is manufactured using TI’s proprietary, high-speed, silicon-germanium (SiGe) process to achieve significant performance improvements over other high-speed, FET-input amplifiers.
The OPA818 is an extremely versatile, wideband TIA photodiode amp for use in optical test and communication equipment, and many medical, scientific, and industrial instruments. The OPA818 showcases a 2.7GHz GBWP, low 2.4pF total input capacitance, and 2.2nV/√Hz input noise. The OPA818 achieves over 85MHz signal bandwidth in a TIA configuration with 20kΩ TIA gain (RF) and 0.5pF photodiode capacitance (CD) with wide output swings. The low-noise architecture with picoampere of input bias current is also an excellent choice for test and measurement applications. Though typically stable in gains ≥ 7V/V, the OPA818 is designed for use in applications with lower gains by applying noise-gain shaping techniques.
The OPA818 is available in an 5-pin SOT-23 package and an 8-lead WSON package with an exposed thermal pad for heat dissipation. This device is specified for operation over the industrial temperature range of –40°C to +85°C.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | OPA818 2.7GHz, High-Voltage, FET-Input, Low-Noise, Operational Amplifier datasheet (Rev. B) | PDF | HTML | 2025. 12. 9 | |
| Application brief | Biasing an APD With OPA596 | PDF | HTML | 2026. 2. 9 | ||
| Product overview | High Speed Amplifiers for In-Vitro Diagnostics (IVD) Analog Front End | PDF | HTML | 2025. 4. 10 | ||
| 애플리케이션 노트 | High Speed ADCs and Amplifiers for Flow Cytometry Applications | 2020. 10. 12 | |||
| 기술 문서 | 3 common questions when designing with high-speed amplifiers | PDF | HTML | 2020. 7. 17 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
OPA818DRGEVM — OPA818 평가 모듈
OPA818 Unencrypted TINA-TI Reference Design Package (Rev. A)
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
아날로그 엔지니어의 계산기는 아날로그 회로 설계 엔지니어가 정기적으로 사용하는 많은 반복 계산의 속도를 높이도록 설계되었습니다. 이 PC 기반 툴은 피드백 저항을 사용한 연산 증폭기 게인 설정부터 아날로그-디지털 컨버터(ADC) 드라이브 버퍼 회로 안정화를 위한 적절한 회로 설계 요소 선택에 이르기까지 다양한 일반적인 계산 목록이 포함된 그래픽 인터페이스를 제공합니다.
이 계산기는 독립 실행형 툴로 유용할 뿐만 아니라 아날로그 엔지니어의 포켓 레퍼런스에 설명된 개념과도 잘 어울립니다.
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| SOT-23 (DBV) | 5 | Ultra Librarian |
| WSON (DRG) | 8 | Ultra Librarian |