AS5912

General description

Short Datasheet

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• v1-00 • 2024-Feb-16

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1.1

Key specifications & features

The benefits and features of AS5912, 512-channel low noise current-to-digital converter are

listed below:

Table 1: Key benefits & features

Benefits

Features

512-channel in a 23 x 15 mm² FBGA package

No external components required. Integrated capacitors

for supply and reference decoupling

Ultra-low noise of 0.29 fC at 0.5 µA input current in

low noise mode

No charge loss. Continuous charge integration due to

zero dead time of ADC architecture

Lowest power dissipation of 1.25 mW per channel in

low power mode

Selectable full-scale range of 0.5 µA in low range and

1 µA in high range

Adjustable integration time down to 51 µs (20 kSPS)

at 20-bit resolution. Up to 26-bit at integration times

of 1 ms

Adjustable full-scale range, integration time and power

consumption via SPI interface as well as adjustable

output modes via LVDS

Zero biased photodiodes (true ground concept) for

ultra-low dark currents

Selectable power supply concept between dual ±1.5 V

analog supply (true ground concept) or single +3.0 V

analog supply

Integral linearity of ±0.080% of reading and

±0.2 ppm of full-scale range (all channels active)

On-chip LDOs, voltage references and temperature

sensor

Automatic zero offset calibration, input charge

calibration and linearity calibration

Built-in diagnostic modes for testing full detector signal

chain

1.2

Applications

•

Medical, industrial and security CT scanner data acquisition

•

Photodiode sensors

•

Multi-channel sensors with current output

•

DAS (Data Acquisition System) for current input