AFE4300
- Weight-scale front-end:
- Supports up to four load cell inputs
- On-chip load cell 1.7-V excitation voltage for ratiometric measurement
- 68-nVrms Input-Referred noise
(0.1 Hz to 2 Hz) - Best-fit linearity: 0.01% of full-scale
- Weight-scale measurement : 540 µA
- Body composition front-end:
- Supports up to three tetra-polar complex impedance measurements
- 6-Bit, 1-MSPS sine-wave generation digital-to-analog converter (DAC)
- 247.5-µArms, ±20% Excitation source
- 0.1-Ω Measurement RMS noise in 2-Hz BW
- Body composition measurement : 970 µA
- Analog-to-digital converter (ADC):
- 16 Bits, 860 SPS
- Supply current: 110 µA
The AFE4300 is a low-cost analog front-end incorporating two separate signal chains: one chain for weight-scale (WS) measurement and the other for body composition measurement (BCM) analysis. A 16-bit, 860-SPS analog-to-digital converter (ADC) is multiplexed between both chains. The weight measurement chain includes an instrumentation amplifier (INA) with the gain set by an external resistor, followed by a 6-bit digital-to-analog converter (DAC) for offset correction, and a circuit to drive the external bridge/load cell with a fixed 1.7 V for ratiometric measurements.
The AFE4300 can also measure body composition by applying a sinusoidal current into the body. The sinusoidal current is generated with an internal pattern generator and a 6-bit, 1-MSPS DAC. A voltage-to-current converter applies this sinusoidal current into the body, between two terminals. The voltage created across these two terminals as a result of the impedance of the body is measured back with a differential amplifier, rectified, and the amplitude is extracted and measured by the 16-bit ADC.
The AFE4300 operates from 2 V to 3.6 V, is specified from 0°C to +70°C, and is available in a LQFP-80 package.
추가 정보 요청
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기술 자료
유형 | 직함 | 날짜 | ||
---|---|---|---|---|
* | Data sheet | AFE4300 Low-Cost, Integrated Analog Front-End for Weight-Scale and Body Composition Measurement datasheet | PDF | HTML | 2019/08/16 |
Application note | Impedance Measurement with AFE4300 | 2013/10/09 | ||
EVM User's guide | AFE4300EVM-PDK User's Guide (Rev. A) | 2012/08/29 |
설계 및 개발
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AFE4300EVM-PDK — AFE4300 체중계 및 신체 성분 측정 AFE 성능 데모 키트(PDK)
AFE4300EVM-PDK is a platform for evaluating the AFE4300 device. AFE4300 is a low cost Analog-Front-End incorporating two separate signal chains, one targeting weight measurement and the other targeting body composition analysis. The EVM provides access for load cell terminals to support up to four (...)
PSPICE-FOR-TI — TI 설계 및 시뮬레이션 툴용 PSpice®
TI 설계 및 시뮬레이션 환경용 PSpice는 기본 제공 라이브러리를 이용해 복잡한 혼합 신호 설계를 시뮬레이션할 수 있습니다. 레이아웃 및 제작에 (...)
패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
---|---|---|
LQFP (PN) | 80 | Ultra Librarian |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치
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