AFE4300PN
ActiveWEIGHT-SCALE AND BODY-COMPOSITION MEASUREMENT ANALOG FRONT END (AFE)
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AFE4300PN
ActiveWEIGHT-SCALE AND BODY-COMPOSITION MEASUREMENT ANALOG FRONT END (AFE)
Technical Specifications
Parameters and characteristics for this part
| Specification | AFE4300PN |
|---|---|
| Mounting Type | Surface Mount |
| Number of Bits | 16 |
| Number of Channels [custom] | 2 |
| Package / Case | 80-LQFP |
| Voltage - Supply, Analog [Max] | 3.6 V |
| Voltage - Supply, Analog [Min] | 2 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Arrow | N/A | 119 | $ 16.45 | |
| Digikey | Tube | 1 | $ 23.34 | |
| 10 | $ 21.53 | |||
| 25 | $ 20.56 | |||
| 119 | $ 18.39 | |||
| 357 | $ 17.54 | |||
| 595 | $ 16.69 | |||
| Texas Instruments | JEDEC TRAY (5+1) | 1 | $ 22.82 | |
| 100 | $ 19.93 | |||
| 250 | $ 15.37 | |||
| 1000 | $ 13.75 | |||
Description
General part information
AFE4300 Series
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.
Documents
Technical documentation and resources
