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AS5911

General Description

Short Datasheet

• PUBLIC

DS001049

• v1-00 • 2023-Jan-27

10

│ 4

1.1

Key Benefits & Features

The benefits and features of AS5911, 256-Channel Low Noise Current-to-Digital Converter, are listed

below:

Figure 1:

Added Value of Using AS5911

Benefits

Features

256-channel in 14 x 14 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