AS7058 datasheet(4/199 Pages) AMSOSRAM

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AS7058

General description

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DS001077 • v2-00 • 2025-Sep-24

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AS7058 IC for PPG, ECG and body

impedance measurement

General description

The AS7058 is an integrated multi-vital sign monitoring device, which provides a complete

photoplethysmogram (PPG), electrocardiogram (ECG), body impedance (BioZ), and

electrodermal activity (EDA). PPG measures the pulse rate or blood oxygen by sampling light

modulated by the blood vessels, which expand and contract as blood pulses through them.

ECG is the reference for any measurement of the biopotential generated by the heart. With

EDA, it is possible to measure the skin’s water content, and with BioZ, the body composition

with an electrical system.

The PPG acquisition system provides up to eight LEDs and eight photodiode inputs. The LEDs

are powered by two high current 8-bit programmable LED drivers with four current ranges.

Additionally, a special laser safety support system can be enabled, which offers the possibility

to use VCSEL die as a light source. The photodiodes can be read out synchronously with two

20-bit ADCs. As the second product in the AS705x family, the AS7058 includes a new method

of ambient light suppression method called advanced automatic offset control (AAOC). This

method enables the system to adjust towards the ambient light situation before the actual

measurement starts and minimizes the loss of data due to the saturation influence by ambient

light.

The ECG channel has high-input impedance, low noise, high CMRR, programmable gain, an

anti-aliasing low-pass filter, and a high-resolution 20-bit ADC. It is designed according to IEC

60601-2-47 Ambulatory ECG Systems monitoring compliance requirements.

The BioZ channel has a low-pass filter and a calibration routine available. The channel also

has high input impedance, low noise, programmable gain, low-pass and high-pass filter

options, and shares the high-resolution ADC with the ECG system. Several ranges of

excitation current and frequencies are also available.

The AS7058 has a DC and AC lead-off detection for the ECG, a flexible clock system, and a

PLL. All three inbuilt ADCs are synchronized. The device is available in a 42-ball wafer-level

chip scale package (WLCSP) with dimensions 2.82 mm x 2.55 mm and operates over the

temperature range -40 °C to 85 °C.

AS7058 데이터시트(PDF) 4 Page - ams-OSRAM AG