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AFE44I31YZR +BOM
Ultra-low-power integrated analog front end (AFE) for wearable optical biosensing with FIFO and I2C
DSBGA-30-
Manufacturer:
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Mfr.Part #:
AFE44I31YZR
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Datasheet:
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Applications:
HRV, Hearables, Optical-HRM, SpO2, Vo2 max
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Number Of Input Channels:
4
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Resolution (Bits):
22
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Number Of LEDs:
6
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EDA/CAD Models:
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Availability: 3074 PCS
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AFE44I31YZR General Description
For those in need of a sophisticated analog front-end solution for optical bio-sensing tasks, the AFE44I30 offers a comprehensive set of features to meet diverse application requirements. From heart-rate monitoring to SpO2 measurements, this versatile device can accommodate up to six LEDs and four photodiodes, providing ample opportunities for customization. The transimpedance amplifier plays a crucial role in converting photodiode current into voltage, while the ADC enables precise digitalization of the signal. With a 128-sample FIFO block and I2C interface, data processing and retrieval become seamless and efficient. Additionally, the integrated LED driver with 8-bit current control ensures consistent illumination levels for accurate sensing. With its high dynamic range circuitry, the AFE44I30 excels in capturing even the smallest signal variations, making it an ideal choice for demanding bio-sensing applications
Key Features
- Supports signal acquisition of up to 24 phases
- Flexible allocation of 6 LED, 4 PD in each phase
- Simultaneous signal acquisition from different sensors at different data rates
- Accurate, continuous heart-rate monitoring:
- System SNR up to 108-dB at 16 µA PD current
- Low current for continuous operation on a wearable device with a typical value: 15 µA for an LED, 20 µA for the receiver
- Transmitter:
- Supports common anode LED configuration
- 8-Bit programmable LED current with range adjustable from 25 mA to 250 mA
- Mode to fire two LEDs in parallel with independent per-phase current control
- Programmable LED on-time per-phase
- Simultaneous support of 6 LEDs for SpO2, HRM, or multi-wavelength HRM
- Receiver:
- Supports 4 time-multiplexed photodiode inputs
- 2 parallel receivers (two sets of TIA/filter)
- Individual ambient offset subtraction DAC at each TIA Input with 8-bit per-phase control and range adjustable up to 255-µA
- Individual LED offset subtraction DAC at each TIA input with 5-bit per-phase control and 15.5-µA range
- Close to 100 dB ambient rejection up to 10 Hz
- Noise filtering with programmable bandwidth
- Transimpedance Gain: 3.7 kΩ to 1 MΩ
- Supports external clock and internal oscillator modes
- Option to acquire data synchronized with a system master clock
- Automatic cancellation of DC from ambient, LED
- FIFO with 128-sample depth
- I2C interface
- 2.6-mm × 2.1-mm DSBGA, 0.4-mm pitch
- Supplies: Rx: 1.7 V-1.9 V (LDO bypass); 1.9 V-3.6 V (LDO enabled), Tx: 3 V-5.5 V, IO: 1.7-3.6 V
Specifications
Applications | HRV, Hearables, Optical-HRM, SpO2, Vo2 max | Number of input channels | 4 |
Resolution (Bits) | 22 | Number of LEDs | 6 |
Interface type | I2C | Operating temperature range (°C) | -40 to 85 |
Rating | Catalog | feature-resolution | 24 |
feature-minimum-single-supply-voltage-v | feature-maximum-single-supply-voltage-v | ||
feature-minimum-dual-supply-voltage-v | feature-maximum-dual-supply-voltage-v | ||
feature-power-supply-type | feature-packaging | ||
feature-rad-hard | feature-pin-count | ||
feature-cecc-qualified | feature-esd-protection | ||
feature-escc-qualified | feature-military | No | |
feature-aec-qualified | feature-aec-qualified-number | ||
feature-eccn-code | EAR99 | feature-svhc | |
feature-svhc-exceeds-threshold |
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AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.
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In Stock: 3,074
Minimum Order: 1
Qty. | Unit Price | Ext. Price |
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1+ | - | - |
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