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AFE4403 Datasheet(PDF) 1 Page - Texas Instruments |
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AFE4403 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 97 page  Product Folder Sample & Buy Technical Documents Tools & Software Support & Community AFE4403 SBAS650B – MAY 2014 – REVISED JULY 2014 AFE4403 Ultra-Small, Integrated Analog Front-End for Heart Rate Monitors and Low-Cost Pulse Oximeters 1 Features 2 Applications 1 • Fully-Integrated AFE for Pulse Oximeter and • Medical Pulse Oximeter Applications Heart Rate Monitoring Applications: • Optical HRM • Transmit: • Industrial Photometry Applications – Integrated Dual LED Driver 3 Description (H-Bridge or Common Anode) The AFE4403 is a fully-integrated analog front-end – Option for a Third LED Support for Optimized (AFE) ideally suited for pulse oximeter applications. SPO2, HRM, or Multi-Wavelength HRM The device consists of a low-noise receiver channel – Up to 110-dB Dynamic Range with an integrated analog-to-digital converter (ADC), – LED Current: an LED transmit section, and diagnostics for sensor and LED fault detection. The device is a very – Programmable to 100 mA with 8-Bit configurable timing controller. This flexibility enables Current Resolution the user to have complete control of the device timing – 30 µA + Average LED Current characteristics. To ease clocking requirements and – Programmable LED On-Time provide a low-jitter clock to the AFE4403, an oscillator is also integrated that functions from an external – Independent LED2 and LED1 Current crystal. The device communicates to an external Reference microcontroller or host processor using an SPI™ • Receive Channel with High Dynamic Range: interface. – 22-Bit Output in Twos Complement Format The device is a complete AFE solution packaged in a – Up to 105-dB Dynamic Range single, compact DSBGA-36 (3.07 mm × 3.07 mm × – Low Power: < 650 µA 0.5 mm) and is specified over the operating temperature range of –20°C to 70°C. – Dynamic Power-Down Mode to Reduce Current to 300 µA Device Information(1) – Adaptable to a Very Wide Range of Signal PART NUMBER PACKAGE BODY SIZE (NOM) Amplitudes: AFE4403 DSBGA (36) 3.07 mm × 3.07 mm – Total Programmable Gain: 10 k Ω to 4 MΩ (1) For all available packages, see the orderable addendum at – Integrated Digital Ambient Estimation and the end of the datasheet. Subtraction • Flexible Clocking by External Clock or Crystal: – Pulse Frequency: 62.5 SPS to 2000 SPS – Flexible Pulse sequencing and Timing Control – Input Clock Range: 4 MHz (Min) to 60 MHz (Max) • Integrated Fault Diagnostics: – Photodiode and LED Open and Short Detection • Supplies: – Rx = 2.0 V to 3.6 V – Tx = 3.0 V to 5.25 V • Package: Compact DSBGA-36 (3.07 mm × 3.07 mm × 0.5 mm) • Specified Temperature Range: –20°C to 70°C 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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