AFE4300
Features
- 1 Weight-scale front-end:
- Supports up to four load cell inputs
- On-chip load cell 1.7-V excitation voltage for ratiometric measurement
- 68-n Vrms Input-Referred noise (0.1 Hz to 2 Hz)
- Best-fit linearity: 0.01% of full-scale
- Weight-scale measurement : 540 µA
- Body position front-end:
- Supports up to three tetra-polar plex impedance measurements
- 6-Bit, 1-MSPS sine-wave generation digital-toanalog converter (DAC)
- 247.5-µArms, ±20% Excitation source
- 0.1-Ω Measurement RMS noise in 2-Hz BW
- Body position measurement : 970 µA
- Analog-to-digital converter (ADC):
- 16 Bits, 860 SPS
- Supply current: 110 µA
2 Applications
Weight scales with body position measurements
3 Description
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 position measurement (BCM) analysis. A 16-bit, 860-SPS analog-to-digital converter (ADC) is multiplexed between both chains. The weight...
