40-pin (RHA) package image

AFE4490RHAT ACTIVE

Integrated Analog Front End (AFE) for Pulse Oximeters

Pricing

Qty Price
+

Quality information

Rating Catalog
RoHS Yes
REACH Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-3-260C-168 HR
Quality, reliability
& packaging information

Information included:

  • RoHS
  • REACH
  • Device marking
  • Lead finish / Ball material
  • MSL rating / Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
View or download

Export classification

*For reference only

  • US ECCN: EAR99

Packaging information

Package | Pins VQFN (RHA) | 40
Operating temperature range (°C) -40 to 85
Package qty | Carrier 250 | SMALL T&R

Features for the AFE4490

  • Fully-Integrated Analog Front-End for
    Pulse Oximeter Applications:
    • Flexible Pulse Sequencing and
      Timing Control
  • Transmit:
    • Integrated LED Driver (H-Bridge, Push, or Pull)
    • 110-dB Dynamic Range Across Full Range (Enables Low Noise at Low LED Current)
    • LED Current:
      • Programmable Ranges of 50 mA, 75 mA, 100 mA, 150 mA, and 200 mA,
        Each with 8-Bit Current Resolution
    • Low Power:
      • 100 µA + Average LED Current
    • LED On-Time Programmability from
      (50 µs + Settle Time) to 4 ms
    • Independent LED2, LED1 Current Reference
  • Receive Channel with High Dynamic Range:
    • Input-Referred Noise:
      50 pARMS (at 5-µA PD Current)
    • 13.5 Noise-Free Bits (at 5-µA PD Current)
    • Analog Ambient Cancellation Scheme with Selectable 1-µA to 10-µA Ambient Current
    • Low Power: < 2.3 mW at 3.0-V Supply
    • Rx Sample Time: 50 µs to 4 ms
    • I-V Amplifier with Seven Separate LED2 and LED1 Programmable Feedback R and C Settings
    • Integrated Digital Ambient Estimation and Subtraction
  • Integrated Fault Diagnostics:
    • Photodiode and LED Open and
      Short Detection
    • Cable On or Off Detection
  • Supplies:
    • Rx = 2.0 V to 3.6 V
    • Tx = 3.0 V or 5.25 V
  • Package: Compact VQFN-40 (6 mm × 6 mm)
  • Specified Temperature Range: –40°C to 85°C

Description for the AFE4490

The AFE4490 is a fully-integrated analog front-end (AFE) that is ideally suited for pulse-oximeter applications. The device consists of a low-noise receiver channel with a 22-bit 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 device, 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 –40°C to 85°C.

Pricing

Qty Price
+

Carrier options

You can choose different carrier options based on the quantity of parts, including full reel, custom reel, cut tape, tube or tray.

A custom reel is a continuous length of cut tape from one reel to maintain lot- and date-code traceability, built to the exact quantity requested. Following industry standards, a brass shim connects an 18-inch leader and trailer on both sides of the cut tape for direct feeding into automated assembly machines. TI includes a reeling fee for custom reel orders.

Cut tape is a length of tape cut from a reel. TI may fulfill orders using multiple strips of cut tapes or boxes to satisfy the quantity requested.

TI often ships tube or tray devices inside a box or in the tube or tray, depending on inventory availability. We pack all tapes, tubes or sample boxes according to internal electrostatic discharge and moisture-sensitivity-level protection requirements.

Learn more

Lot and date code selection may be available

Add a quantity to your cart and begin the checkout process to view the options available to select lot or date codes from existing inventory.

Learn more