제품 상세 정보

Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 8 Input offset (±) (max) (µV) 35 Voltage gain (min) (V/V) 2000 Voltage gain (max) (V/V) 2000 Noise at 1 kHz (typ) (nV√Hz) 1.5 Features Current Feedback, High speed, Super-beta, Ultra-low noise CMRR (min) (dB) 132 Input offset drift (±) (max) (µV/°C) 0.45 Input bias current (±) (max) (nA) 50 Iq (typ) (mA) 6.2 Bandwidth at min gain (typ) (MHz) 2.8 Gain error (±) (max) (%) 0.15 Operating temperature range (°C) -40 to 125 Rating Catalog Type Fixed Gain Gain nonlinearity (±) (max) (%) 0.001 Output swing headroom (to negative supply) (typ) (V) 0.15 Output swing headroom (to positive supply) (typ) (V) -0.15 Input common mode headroom (to negative supply) (typ) (V) 2.5 Input common mode headroom (to positive supply) (typ) (V) -2.5 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.055
Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 8 Input offset (±) (max) (µV) 35 Voltage gain (min) (V/V) 2000 Voltage gain (max) (V/V) 2000 Noise at 1 kHz (typ) (nV√Hz) 1.5 Features Current Feedback, High speed, Super-beta, Ultra-low noise CMRR (min) (dB) 132 Input offset drift (±) (max) (µV/°C) 0.45 Input bias current (±) (max) (nA) 50 Iq (typ) (mA) 6.2 Bandwidth at min gain (typ) (MHz) 2.8 Gain error (±) (max) (%) 0.15 Operating temperature range (°C) -40 to 125 Rating Catalog Type Fixed Gain Gain nonlinearity (±) (max) (%) 0.001 Output swing headroom (to negative supply) (typ) (V) 0.15 Output swing headroom (to positive supply) (typ) (V) -0.15 Input common mode headroom (to negative supply) (typ) (V) 2.5 Input common mode headroom (to positive supply) (typ) (V) -2.5 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.055
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • Fixed gain of 2000 V/V
  • Access to internal nodes for filtering
  • Ultra-low noise: 1.5 nV/√Hz input voltage noise (maximum)
  • Precision super-beta input performance:
    • Low offset voltage: 35 µV (maximum)
    • Low offset voltage drift: 0.45 µV/°C (maximum)
    • Low input bias current: 25 nA (typical)
    • Low gain drift: 5 ppm/°C (maximum)
  • Bandwidth: 2.8 MHz
  • Slew rate: 45 V/µs
  • Common-mode rejection: 132 dB (minimum)
  • Supply range:
    • Single supply: 8 V to 36 V
    • Dual supply: ±4 V to ±18 V
  • Specified temperature range: –40°C to +125°C
  • Package: 8-pin SOIC
  • Fixed gain of 2000 V/V
  • Access to internal nodes for filtering
  • Ultra-low noise: 1.5 nV/√Hz input voltage noise (maximum)
  • Precision super-beta input performance:
    • Low offset voltage: 35 µV (maximum)
    • Low offset voltage drift: 0.45 µV/°C (maximum)
    • Low input bias current: 25 nA (typical)
    • Low gain drift: 5 ppm/°C (maximum)
  • Bandwidth: 2.8 MHz
  • Slew rate: 45 V/µs
  • Common-mode rejection: 132 dB (minimum)
  • Supply range:
    • Single supply: 8 V to 36 V
    • Dual supply: ±4 V to ±18 V
  • Specified temperature range: –40°C to +125°C
  • Package: 8-pin SOIC

The INA848 is a fixed-gain instrumentation amplifier optimized for high-precision measurements, such as very-small, fast, differential input signals. TI’s super-beta topology provides a very low input bias current and current noise. The well-matched transistors help achieve a very low offset and offset drift. Matching of the internal resistors yields a high common-mode rejection ratio of 132 dB across the full input-voltage range, and a very low gain drift error of 5 ppm/⁰C (max).

The current-feedback topology of the INA848 produces a wide bandwidth of 2.8 MHz at a fixed gain of 2000, thereby eliminating the need for subsequent gain stages. The very-low noise floor of 1.3 nV/√Hz minimizes the impact on the equivalent number of bits (ENOB) when interfacing with high-resolution analog-to-digital converters (ADCs). The INA848 provides the flexibility of adding filters between the gain stages (pins 2 and 3) to maintain an adequate signal integrity.

These unique features of the INA848 make this device an excellent choice for applications requiring high-precision measurements, such as high-end medical instrumentation, electroencephalography, vibration sensing, and displacement measurements.

This device is designed for 8-V to 36-V single supplies, or ±4-V to ±18-V on dual supplies.

The INA848 is a fixed-gain instrumentation amplifier optimized for high-precision measurements, such as very-small, fast, differential input signals. TI’s super-beta topology provides a very low input bias current and current noise. The well-matched transistors help achieve a very low offset and offset drift. Matching of the internal resistors yields a high common-mode rejection ratio of 132 dB across the full input-voltage range, and a very low gain drift error of 5 ppm/⁰C (max).

The current-feedback topology of the INA848 produces a wide bandwidth of 2.8 MHz at a fixed gain of 2000, thereby eliminating the need for subsequent gain stages. The very-low noise floor of 1.3 nV/√Hz minimizes the impact on the equivalent number of bits (ENOB) when interfacing with high-resolution analog-to-digital converters (ADCs). The INA848 provides the flexibility of adding filters between the gain stages (pins 2 and 3) to maintain an adequate signal integrity.

These unique features of the INA848 make this device an excellent choice for applications requiring high-precision measurements, such as high-end medical instrumentation, electroencephalography, vibration sensing, and displacement measurements.

This device is designed for 8-V to 36-V single supplies, or ±4-V to ±18-V on dual supplies.

다운로드 스크립트와 함께 비디오 보기 비디오

관심 가지실만한 유사 제품

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다른 핀 출력을 지원하지만 비교 대상 장치와 동일한 기능.
INA849 활성 초저잡음(1nV/√Hz), 고속(28MHz, 35V/μs), 정밀(35μV) 계측 증폭기 Resistor set gain version
INA851 활성 OVP(±40V)를 지원하는 저잡음(3.2nV/√Hz) 고속(22MHz) 완전 차동 계측 증폭기 Fully differential output, overvoltage protection (±60 V) and attenuation gain.

기술 자료

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3개 모두 보기
상위 문서 유형 직함 형식 옵션 최신 영어 버전 다운로드 날짜
* 데이터 시트 INA848 Ultra-Low-Noise (1.5 nV/√Hz), High-Bandwidth Instrumentation Amplifier With Fixed Gain of 2000 datasheet PDF | HTML 2020. 9. 24
애플리케이션 노트 Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps PDF | HTML 2021. 7. 27
기술 문서 What is an instrumentation amplifier? PDF | HTML 2019. 8. 9

설계 및 개발

추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.

시뮬레이션 모델

INA848 PSpice Model (Rev. B)

SBOMBI4B.ZIP (24 KB) - PSpice 모델
지원되는 제품 및 하드웨어
시뮬레이션 모델

INA848 TINA-TI Reference Design

SBOMBI5.TSC (40 KB) - TINA-TI 레퍼런스 설계
지원되는 제품 및 하드웨어
시뮬레이션 모델

INA848 TINA-TI Spice Model

SBOMBI3.ZIP (23 KB) - Tina-TI Spice 모델
지원되는 제품 및 하드웨어
계산 툴

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.

지원되는 제품 및 하드웨어
패키지 CAD 기호, 풋프린트 및 3D 모델
SOIC (D) 8 Ultra Librarian

주문 및 품질

지원 및 교육

TI 엔지니어의 기술 지원을 받을 수 있는 TI E2E™ 포럼

콘텐츠는 TI 및 커뮤니티 기고자에 의해 "있는 그대로" 제공되며 TI의 사양으로 간주되지 않습니다. 사용 약관을 참조하십시오.

품질, 패키징, TI에서 주문하는 데 대한 질문이 있다면 TI 지원을 방문하세요. ​​​​​​​​​​​​​​

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