This document describes the CS5521/22/23/24/28 series ADCs from Cirrus Logic, released in 2005. These ADCs are 16-bit or 24-bit, 2/4/8-channel devices with features such as low input current, scalable input span, and fourth-order Delta-Sigma A/D converter.
The CS5521/22/23/24/28 family are highly integrated 16‑bit (CS5521/23) and 24‑bit (CS5522/24/28) analog‑to‑digital converters offering low‑input‑current chopper‑stabilized instrumentation amplifiers and programmable gain. They support selectable input spans from 25 mV up to 5 V (and external 10 V/100 V) and operate from a single +5 V supply.
The datasheet includes detailed analog and digital characteristics, pin descriptions, conversion protocols, calibration procedures, and package dimensions. Typical performance figures such as noise, resolution, power consumption, and sampling rates are provided for each device variant.
| Resolution | 16‑bit (CS5521/23) / 24‑bit (CS5522/24/28) |
|---|---|
| Low Input Current | 100 pA |
| Maximum Sampling Rate | 617 Sps (XIN = 200 kHz) |
| Power Consumption (Normal Mode) | 6.0 mW – 12 mW depending on device |
| Supply Voltage | Single +5 V operation |
The devices can sample up to 617 samples per second when XIN is 200 kHz.
Normal‑mode power consumption ranges from 6.0 mW for the lower‑bit parts to 12 mW for the higher‑bit parts.
The ADCs feature a low input current of 100 pA.