General Description

The CS5581 is a single-channel, 16-bit analog-to-digital converter capable of 200 kSps conversion rate. The input accepts a single-ended analog input signal. On-chip buffers provide high input impedance for both the AIN input and the VREF+ input. This significantly reduces the drive requirements of signal sources and reduces errors due to source impedances. The CS5581 is a delta-sigma converter capable of switching multiple input channels at a high rate with no loss in throughput. The ADC uses a low-latency digital filter architecture.

Features

❐ Single-ended Analog Input

❐ On-chip Buffers for High Input Impedance

❐ Conversion Time = 5 µS

❐ Settles in One Conversion

❐ Linearity Error = 0.0008

❐ Signal-to-Noise = 80 dB

❐ S/(N + D) = 80 dB

❐ DNL = ±0.1 LSB Max.

❐ Simple three/four-wire serial interface

❐ Power Supply Configurations:

- Analog: +5V/GND; IO: +1.8V to +3.3V

- Analog: ±2.5V; IO: +1.8V to +3.3V

❐ Power Consumption:

- ADC Input Buffers On: 85 mW

- ADC Input Buffers Off: 60 mW