AFE4400
Integriertes Analog-Frontend (AFE) für Herzfrequenzmonitore und kostengünstige Pulsoximeter
AFE4400
- Fully-Integrated Analog Front-End for Pulse Oximeter Applications:
- Flexible Pulse Sequencing and
Timing Control
- Flexible Pulse Sequencing and
- Transmit:
- Integrated LED Driver
(H-Bridge, Push, or Pull) - Dynamic Range: 95 dB
- LED Current:
- Programmable to 50 mA with 8-Bit Current Resolution
- Low Power:
- 100 µA + Average LED Current
- Programmable LED On-Time
- Independent LED2 and LED1 Current Reference
- Integrated LED Driver
- Receive Channel with High Dynamic Range:
- 13 Noise-Free Bits
- Low Power: < 670 µA at 3.3-V Supply
- Integrated Digital Ambient Estimation and Subtraction
- Flexible Receive Sample Time
- Flexible Transimpedance Amplifier with Programmable LED Settings
- Integrated Fault Diagnostics:
- Photodiode and LED Open and
Short Detection - Cable On and Off Detection
- Photodiode and LED Open and
- Supplies:
- Rx = 2.0 V to 3.6 V
- Tx = 3.0 V to 5.25 V
- Package: Compact VQFN-40 (6 mm × 6 mm)
- Specified Temperature Range: 0°C to 70°C
The AFE4400 is a fully-integrated analog front-end (AFE) ideally suited for pulse oximeter applications. The device consists of a low-noise receiver channel with an integrated analog-to-digital converter (ADC), an LED transmit section, and diagnostics for sensor and LED fault detection. The device is a very configurable timing controller. This flexibility enables the user to have complete control of the device timing characteristics. To ease clocking requirements and provide a low-jitter clock to the AFE4400, an oscillator is also integrated that functions from an external crystal. The device communicates to an external microcontroller or host processor using an SPI™ interface.
The device is a complete AFE solution packaged in a single, compact VQFN-40 package (6 mm × 6 mm) and is specified over the operating temperature range of 0°C to 70°C.
Technische Dokumentation
Typ | Titel | Datum | ||
---|---|---|---|---|
* | Data sheet | AFE4400 Integrated Analog Front-End for Heart Rate Monitors and Low-Cost Pulse Oximeters datasheet (Rev. H) | PDF | HTML | 24 Jul 2014 |
White paper | Fortschrittliche Halbleitertechnologie für moderne Telemedizin-Anwendungen | 28 Okt 2020 | ||
EVM User's guide | AFE44x0SPO2EVM User's Guide (Rev. C) | 27 Mai 2014 |
Design und Entwicklung
Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.
AFE4400SPO2EVM — AFE4400 – integriertes Analog-Frontend für Herzfrequenzmonitore und preiswerte Pulsoximeter
The AFE44x0SPO2EVM is intended for evaluating AFE4400 and AFE4490 devices. The family of devices are fully integrated AFE ideally suited for Pulse Oximeter applications and consist of low noise receive channel, the LED transmit section and diagnostics for sensor and LED fault detection. The (...)
AFE4490SPO2EVM — AFE4490 – Evaluierungsmodul für integriertes Analog-Frontend (AFE) für Pulsoximeter
The AFE44x0SPO2EVM is intended for evaluating AFE4400 and AFE4490 devices. The family of devices are fully integrated AFE ideally suited for Pulse Oximeter applications and consist of low noise receive channel, the LED transmit section and diagnostics for sensor and LED fault detection. The (...)
SLAC556 — AFE44x0SPO2EVM GUI v2.4
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Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
---|---|---|
VQFN (RHA) | 40 | Ultra Librarian |
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