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2022-09-24 17:43:29
AFE4490RHAT Medical Pulse Oximeter Applications Industrial Light Measurement Applications
Product Features
Fully integrated analog front end for
Pulse oximeter application:
flexible pulse sequencing and
timing control
send:
Integrated Light Emitting Diode (LED) Driver (H-Bridge, Push-Pull)
110dB dynamic range across the entire range (low noise at low LED current)
LED current:
Programmable ranges of 50mA, 75mA, 100mA, 150mA and 200mA,
Each with 8-bit current resolution
Low power consumption:
100μA + average LED current
LED on-time programmability from
(50μs + settling time) to 4ms
Independent LED2, LED1 Current Reference
Receive channel with high dynamic range:
Input correlated noise:
50 pARMS (measured at 5μA PD current)
13.5 Noise Free Bits (measured at 5μA PD current)
Analog ambient cancellation mechanism with 1µA to 10µA selectable ambient current
When powered by 3.0V power supply, low power consumption: < 2.3mW
Rx sampling time: 50μs to 4ms
IV Amplifier with 7 Individual LED2 and LED1 Programmable Feedback R and C Settings
Integrated digital environment estimation and pruning
Integrated Troubleshooting:
Photodiode and LED open circuit with
Short circuit detection
Cable make or break detection
power supply:
Rx = 2.0V to 3.6V
Tx = 3.0V or 5.25V
Package: Compact Ultra-Thin Quad Flat No-Lead (VQFN)-40 (6mm x 6mm)
Rated temperature range: -40°C to 85°C