Cirrus Logic AN259 - Manual (Page 2)

AN259
2 AN259REV2
For users of the CS4382, the CS4385 is a simple, yet affordable, upgrade to a richer feature set and lower
out-of-band noise performance.
2. The Design Transition
2.1 Transitioning from the CS4382 to CS4382A
2.1.1 Hardware changes
The CS4382A pinout was primarily based on the CS4382 with only 2 pins changing function. Other
pins have new recommended components but the circuit topologies remain the same and thus do not
require modification to the PCB. The most significant change is that the VD core of the CS4382A
requires 2.5 V for operation, whereas the CS4382 was able to run from 3.3 V to 5 V. The CS4382A will
NOT operate off of a VD supply of 3.3 V or 5 V.
Figure 1 and Figure 2 show the CS4382 and CS4382A pinouts respectively. The changes to the two
pinouts are highlighted. Figure 1 highlights the pins which have changed function and which may
require a PCB change. Figure 2 highlights the pins which have new recommended components.
Table 1. Product Comparison
CS4385 CS4382A CS4382
Dynamic Range dB 114 114 114
THD+N dB -100 -100 -100
Resolution bits 24 24 24
Sample Rate kHz 192 192 192
Power Supply VA 5 5 5
VD 2.5 2.5 3.3 to 5
Volume Control 0.5 dB 1 dB 1 dB
Auto Fs Detect Yes No No
Package 48-LQFP 48-LQFP 48-LQFP