AFE4490RHAT - TI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

AFE4490RHAT
Manufacturer

TI
ChipWorker Part#

CW3642708
Category

Specialty Application IC
Package

VQFN-40
Description

AFE Medical 1ADC 22Bit 3.3V/5V 40Pin VQFN EP T/R
Documentation

Datasheet

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AFE4490RHAT Specifications

Attribute	Attribute Value

Part Number	AFE4490RHAT
Manufacturer	TI
ChipWorker Part#	CW3642708
Category	Specialty Application IC
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	40 Pin
Case/Package	VQFN-40
Supply Voltage (DC)	3.00V (min)
Number of Channels	1 Channel
Number of Positions	40 Position
Number of Bits	22 Bit
Power Dissipation	1.54 W
Number of ADCs	1 ADC
Operating Temperature (Max)	85 ℃
Operating Temperature (Min)	-40 ℃
Supply Voltage (Max)	5.25 V
Supply Voltage (Min)	3 V
Input Voltage	2V ~ 3.6V
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Operating Temperature	-40℃ ~ 85℃
Product Lifecycle Status	Active
Packaging	Tape & Reel (TR)
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance Edition	2015/06/15
ECCN Code	EAR99

Product Description

The AFE4490RHAT is a fully-integrated Analog Front End 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.
Flexible pulse sequencing and timing control
Transmit - Integrated LED driver (H-Bridge, Push or Pull)
Transmit - 110dB Dynamic range across full range (Enables low noise at low LED current)
Transmit - Programmable ranges of 50mA, 75mA 100mA, 150mA and 200mA, with 8-bit current resolution
Transmit - LED on-time programmability from (50µs + Settle Time) to 4ms
Transmit - Independent LED2, LED1 current reference
Receive channel with high dynamic range
Receive - 50pARMS (at 5µA PD Current) Input-referred noise
Receive - 13.5 Noise-free bits (at 5µA PD Current)
Receive - Analog ambient cancellation scheme with selectable 1 to 10µA Ambient current
Receive - 50µs to 4ms Rx Sample time
Receive - I-V Amplifier with seven separate LED2 and LED1 programmable feedback R and C settings
Receive - Integrated digital ambient estimation and subtraction
Integrated fault diagnostics - Photodiode and LED Open/Short detection, Cable ON or OFF detection

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