AFE4400

AKTIV

Integriertes Analog-Frontend (AFE) für Herzfrequenzmonitore und kostengünstige Pulsoximeter

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Datenblatt

document-pdfAcrobat AFE4400 Integrated Analog Front-End for Heart Rate Monitors and Low-Cost Pulse Oximeters datasheet (Rev. H) (Englisch) PDF | HTML

AFE4400

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Applications

Clinical fingertip pulse oximetry, Optical-HRM, SpO2

Number of input channels

1

Resolution (Bits)

22

Interface type

SPI

Operating temperature range (°C)

0 to 70

Rating

Catalog

Applications

Clinical fingertip pulse oximetry, Optical-HRM, SpO2

Number of input channels

1

Resolution (Bits)

22

Interface type

SPI

Operating temperature range (°C)

0 to 70

Rating

Catalog

VQFN (RHA)

40

36 mm² (6 mm × 6 mm)

Fully-Integrated Analog Front-End for Pulse Oximeter Applications:
- Flexible Pulse Sequencing and
  Timing Control
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
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
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

Fully-Integrated Analog Front-End for Pulse Oximeter Applications:
- Flexible Pulse Sequencing and
  Timing Control
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
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
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.

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.

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Technische Dokumentation

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Top-Dokumentation	Typ	Titel	Format-Optionen	Neueste englische Version herunterladen	Datum
*	Datenblatt	AFE4400 Integrated Analog Front-End for Heart Rate Monitors and Low-Cost Pulse Oximeters datasheet (Rev. H)	PDF \| HTML		24.07.2014
	Whitepaper	Fortschrittliche Halbleitertechnologie für moderne Telemedizin-Anwendungen		Download English Version	28.10.2020

Design und Entwicklung

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Evaluierungsplatine

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 (...)

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