首页 > 集成电路 IC > AFE4490RHAR

AFE4490RHAR

Fully integrated 22-bit pulse oximeter AFE, 2-LED driver, 110dB dynamic range, VQFN-40

2870

有效库存
转到查询

Image for reference only

制造商零件：

AFE4490RHAR

包装：

VQFN-40 (6.00 x 6.00 mm)

品牌：
产品类别：
质量承诺
发货与付款
服务与包装
产品手册
您可能感兴趣的其他建议.

SII9396SCNUC-BAR

302S43W472KV4E

IXTT10N100D2

IS25LP016D-JNLE-TR

IS25WP256D-JLLE

IS62WV51216BLL-55BLI

IS42S16160J-7TLI

IS43TR16256BL-125KBLI

说明

产品概览

The AFE4490RHAR from Texas Instruments is a fully integrated analog front-end (AFE) for pulse oximeter applications. It integrates a 22-bit ADC, low-noise transimpedance amplifier with programmable gain, a flexible LED driver supporting H-bridge/push/pull configurations, and comprehensive diagnostics. Packaged in a VQFN-40 (6mm x 6mm), it enables complete pulse oximeter signal chains with minimal external components.

主要规格

ADC Resolution 22 bits
Number of LED Channels 2 (Red and IR)
LED Current Ranges 50mA, 75mA, 100mA, 150mA, 200mA
LED Current Resolution 8-bit per range
Dynamic Range 110dB across full range
Input-Referred Noise 50pARMS (at 5µA PD current)
Noise-Free Bits 13.5 (at 5µA PD current)
Rx Supply 2.0V to 3.6V
Tx Supply 3.0V or 5.25V
Rx Power Consumption <2.3mW at 3.0V
Interface SPI
工作温度 -40°C to +85°C
包装 VQFN-40 (6 x 6 mm)

特点

  • Fully integrated AFE for pulse oximetry
  • Flexible LED driver with H-bridge, push, or pull configurations
  • 110dB dynamic range enabling low LED current operation
  • Programmable LED on-time: 50µs to 4ms
  • Analog ambient cancellation with 1µA to 10µA range
  • 7 separate feedback R and C settings per LED channel
  • Built-in photodiode and LED open/short diagnostics
  • Cable on/off detection

应用

  • Clinical fingertip pulse oximeters
  • Wearable SpO2 monitoring
  • Industrial photometry
  • Optical biosensors
  • Patient monitoring systems

The AFE4490RHAR is a complete analog front-end for pulse oximeter applications from Texas Instruments. It integrates a 22-bit ADC with a low-noise transimpedance amplifier (TIA), programmable second-stage gain, and an LED driver section that supports H-bridge, push, and pull configurations for both Red and IR LEDs. The device achieves 110dB dynamic range across the full LED current range, enabling operation at lower LED currents for power-sensitive wearable applications. Input-referred noise of 50pARMS at 5µA photodiode current delivers 13.5 noise-free bits of resolution. The flexible timing controller allows complete control over LED pulse sequencing with programmable on-time from 50µs to 4ms. Integrated diagnostics include photodiode and LED open/short detection plus cable on/off monitoring.

The AFE4490RHAR operates as a synchronous sampling pulse oximeter AFE. The LED driver section drives Red and IR LEDs in a time-multiplexed sequence under control of the flexible timing controller. During each LED pulse, the photodiode current is converted to voltage by the TIA with seven selectable feedback resistor and capacitor settings per LED channel for optimal noise versus bandwidth tradeoffs. The second-stage amplifier provides additional programmable gain. An analog ambient cancellation circuit subtracts ambient light contribution (1µA to 10µA selectable) before the ADC. The 22-bit ADC digitizes each sample, and results are available via SPI. The timing controller independently manages LED2, Ambient(LED2), LED1, and Ambient(LED1) phases with programmable timing. Diagnostic circuits continuously monitor photodiode and LED integrity, reporting faults through the SPI interface.

针脚 名称 类型 说明
1 INN Analog Input Negative input to TIA; connects to photodiode cathode
2 INP Analog Input Positive input to TIA; connects to photodiode anode
3 VCM Analog Output Common-mode voltage output; used as shield for INP/INN traces
10 TXN 电源 LED driver negative terminal; connects to LED cathode in H-bridge mode
11 TXP 电源 LED driver positive terminal; connects to LED anode in H-bridge mode
15 RX_ANA_SUP 电源 Analog receiver supply (2.0V to 3.6V)
20 LED_DRV_SUP 电源 LED driver supply (3.0V to 5.25V)
25 CLK 输入 External clock input from crystal oscillator (8MHz typical)
30 SPICLK 输入 SPI serial clock input
31 SPICS 输入 SPI chip select (active low)
32 SPIDIN 输入 SPI data input
33 SPIDOUT 输出 SPI data output
  • Clinical Fingertip Pulse Oximeter: Complete SpO2 and pulse rate measurement solution with Red (660nm) and IR (940nm) LED drivers, achieving clinical-grade accuracy with 22-bit resolution and 50pARMS input noise
  • Wearable SpO2 Monitor: Continuous blood oxygen monitoring in smartwatches and fitness bands with less than 2.3mW receive power and programmable low LED current operation extending battery life
  • Industrial Photometry: Precision optical measurement in liquid analysis and gas sensing applications using the flexible LED timing and 110dB dynamic range for wide concentration measurement
  • Patient Monitoring System: Multi-parameter patient monitors with integrated cable detection and LED/PD diagnostics ensuring reliable operation in hospital environments
  • Optical Biosensor: Research and development of PPG-based blood pressure and cardiac output estimation algorithms leveraging the high-resolution 22-bit data and flexible timing control
模型 制造商 Resolution LEDs 主要区别
AFE4404 TI 24-bit 3 Higher resolution, 3-LED support for SpO2 + multi-wavelength
AFE4405 TI 24-bit 4 4-LED, more flexible for advanced biosensing
MAX30102 ADI 18-bit 2 Integrated LEDs and PD in module package
MAX86141 ADI 19-bit 3 Higher resolution, 3-LED, lower power
OB1203 瑞萨 20-bit 3 Integrated light-to-digital with ambient light sensor
推荐部件

SII9396SCNUC-BAR

HDMI 2.0 Bridge, 4K@60Hz, HDCP 2.2 Repeater, MHL 3.0, 76-pin QFN EP

品牌:

封装:

76-Pin QFN EP (9.0 x 9.0 x 0.83 mm)
有库存：
6848pcs

货运周期：3~7 天
最低订购量为 1

转到查询

302S43W472KV4E

4700pF 3000V X7R MLCC, 10%, 1812, high-voltage TANCERAM, -55 to 125C, tape and reel

品牌:

封装:

1812 (4.50 x 3.18 x 2.80 mm)
有库存：
4146pcs

货运周期：3~7 天
最低订购量为 1

转到查询

IXTT10N100D2

N-Channel depletion-mode MOSFET, 1000V, 10A, 1.5Ohm, normally-on, TO-268AA, 695W

品牌:

封装:

TO-268AA / D3PAK (15.75 x 13.08 x 4.83 mm)
有库存：
14959pcs

货运周期：3~7 天
最低订购量为 1

转到查询

IS25LP016D-JNLE-TR

16Mbit SPI NOR Flash, 3V, QSPI/QPI, 133MHz, DTR, SOIC-8 150mil, -40 to 105C, TR

品牌:

封装:

8-SOIC (4.90 x 3.90 x 1.75 mm, 150mil)
有库存：
11082pcs

货运周期：3~7 天
最低订购量为 1

转到查询

IS25WP256D-JLLE

256Mbit SPI NOR Flash, 1.8V, QPI/QSPI, 104MHz, DTR, WSON-8 6x8mm, -40 to 105C

品牌:

封装:

8-WSON (6.0 x 8.0 x 0.73 mm, exposed pad)
有库存：
13368pcs

货运周期：3~7 天
最低订购量为 1

转到查询

IS62WV51216BLL-55BLI

8Mbit async SRAM, 512Kx16, 2.5-3.6V, 55ns, ultra-low power, 48-mini BGA, Industrial

品牌:

封装:

48-Mini BGA (7.2 x 8.7 x 0.9 mm)
有库存：
3838pcs

货运周期：3~7 天
最低订购量为 1

转到查询
质量保证

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

1. Authorized & Genuine Sourcing Promise

All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

2. Strict Full-batch Quality Inspection

We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

3. Industry Standard Compliance

Our products comply with a variety of international industry quality standards to adapt to high-standard application scenarios:
  • 汽车电子: All automotive-grade components pass AEC-Q series certification, featuring excellent stability and durability to adapt to complex vehicle operating environments.
  • 医疗设备: High-reliability components meet medical industry safety and compliance regulations, ensuring stable operation for medical equipment.
  • Industrial Control & Consumer Electronics: Products conform to universal international electronic industry standards, suitable for long-term continuous operation of various equipment.

4. Professional Reliability Control

For static-sensitive, moisture-sensitive and precision components such as ICs, PCBs, sensors and connectors, we carry out reliability screening in advance. Combined with standardized ESD anti-static packaging and vacuum moisture-proof packaging, we avoid component damage caused by static electricity, dampness or collision during storage and transportation, and retain the original performance of products.

5. Traceability Management System

We establish a complete product traceability system. Each batch of goods corresponds to independent batch number, sourcing record, inspection record and delivery record. Customers can query the whole lifecycle information of components at any time. This system effectively solves quality risks and facilitates after-sales handling and production quality control for your company.

6. After-sales Quality Guarantee

If any product is confirmed to have non-conformity quality problems due to our reasons after receipt, we provide free return, exchange and supplementary delivery services. Our professional quality team will also conduct root cause analysis to optimize our quality control process. We respond to quality feedback within 24 hours to resolve your worries efficiently.

联系我们

If you have inquiries about our quality standards, inspection procedures or product certification documents, please feel free to contact us:

 

Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

发货与付款

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

1. Payment Terms

We offer a variety of secure and convenient payment methods to meet diverse business cooperation needs. Details are as follows:
  1. Accepted Payment Methods
  • T/T (Bank Wire Transfer): The primary settlement method for bulk orders and a widely used international payment channel.
  • PayPal: Ideal for small orders, sample orders and quick payments.

  1. Settlement Currency

     

    US Dollar (USD) is the default settlement currency. RMB is available for domestic customers.

  2. Bank Charges

     

    All transfer fees, intermediary bank charges and other remittance-related expenses shall be borne by the buyer.

  3. Payment Requirements
  • Sample and small orders: Shipment will be arranged upon full payment.
  • In-stock bulk orders: Goods will be delivered within 2 to 3 working days after full payment.

2. Shipping & Delivery

We partner with leading global logistics providers to ensure safe and fast delivery worldwide. Relevant details are listed below:
  1. Logistics Partners
  • International Express: DHL, FedEx, UPS, TNT
  • Economy Logistics: Air freight and sea freight for large-volume cargo
  • Domestic Delivery: SF Express, Yunda Express
  1. Order Processing Time
  • In-stock items: Orders confirmed and fully paid before 14:00 (GMT+8) will be shipped on the same day. All other orders will be dispatched within 1 to 2 working days.
  • Out-of-stock or sourced items: The delivery lead time will be confirmed separately according to brand and inventory status.
  1. Estimated Transit Time
  • International Express: 3 – 7 working days globally
  • Air Freight: 7 – 12 working days
  • Sea Freight: 25 – 40 working days for heavy and large bulk cargo
  1. Shipping Fee Rules
  • Shipping cost is calculated based on package weight, volume, destination and delivery method.
  • Both freight prepaid and freight collect are available. Please provide your courier account number in advance if you choose freight collect.
  • Free international express delivery is offered for large orders. Terms for long-term partners can be negotiated separately.
  1. Shipment Tracking
     

    Within 24 hours after dispatch, we will send the tracking number, commercial invoice, packing list and other documents to your email or communication account. You may check the shipment status online in real time.

3. General Order Rules & Notes

  1. MOQ & Sample Service

     

    We support flexible minimum order quantities for samples, small-batch and large-batch orders. All sample orders shall comply with the above shipping and payment policies.

  2. Packaging Standard

     

    All electronic components are packed with professional anti-static and shockproof materials. Original factory packaging is available for branded chips and integrated circuits.

4. Customs & Liability Statement

  1. Import Duties & Taxes

     

    All import duties, customs clearance fees and local taxes incurred for international shipments shall be borne by the buyer. We will provide complete customs documents to assist you with clearance procedures.

  2. Handling of Lost or Damaged Goods
  • In case of loss or severe damage during transit, please contact us within 48 hours after receiving the tracking information. We will assist you in filing a claim with the logistics provider.
  • We shall not be liable for any losses caused by incorrect delivery address, wrong contact information or the buyer’s refusal to complete customs clearance.

5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
  • Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
  • Business Hours: 09:00 – 18:00, Monday to Friday. Closed on weekends and official public holidays.
  • Notice: Please make an appointment via email or communication tools one day in advance, and present your order information upon pickup.

Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

服务与包装

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

Core Services

1. One-stop Sourcing & BOM Support

We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

3. Fast Quotation & Order Processing

Our customer service team responds promptly to inquiries and quotation requests. All in-stock orders will be processed within one working day. We provide stocking reservation services for long-term cooperative customers, effectively solving problems such as component shortages and unstable supply chains.

4. Professional Technical Support

Our senior engineer team provides free technical consultation, model selection guidance and original manufacturer datasheets. We assist customers in solving problems related to product R&D, circuit design and component application, providing reliable technical support for project progress.

5. Sourcing for Special Components

Relying on our global supply chain network, we professionally source scarce components, obsolete parts and customized special components to efficiently solve your procurement difficulties.

6. Global Logistics & Document Services

We cooperate with mainstream international logistics providers including DHL, FedEx, UPS and TNT to achieve fast global delivery. We can provide complete export documents such as customs declaration files, commercial invoices and packing lists to ensure smooth customs clearance for international shipments. Local pickup is also available for customers in Shenzhen, China.

Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

1. General Packaging Specifications

  • All components are packed separately to avoid damage caused by friction and collision;
  • Shockproof buffer materials are added for fragile products to ensure transportation safety;
  • Each package is clearly marked with part number, quantity, batch number and specifications for easy inventory counting and management.

2. Classified Professional Packaging

  • Anti-static Packaging: Static-sensitive components such as chips, circuit boards and sensors are packaged with anti-static bags, shielding boxes and conductive foam in strict accordance with international anti-static standards to prevent static damage.
  • Vacuum Moisture-proof Packaging: Moisture-sensitive components are vacuum-sealed with desiccants to isolate humid air, suitable for ocean transportation and long-term storage.
  • Original Factory Packaging: Integrated circuits of brands such as NXP are delivered with original reels, trays or tubes by default, retaining complete original packaging and adapting to automated SMT production lines.
  • Discrete Device Packaging: Discrete devices such as SMD resistors, power resistors and LEDs are quantitatively and classifiedly packaged with accurate quantity and clear marking.
  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

3. Custom Packaging Services

We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

Online Inquiry Form

Support Excel, PDF, CSV format files for full BOM list quotation

Submit your component procurement and custom packaging needs via the form below. We will provide a detailed quotation and professional solution within 1–8 working hours.

公司名称
洞察力
工业
所有产品
集成电路
工商设备
离散
内存芯片
MPU 和 MCU