CS5521/22/23/24/28
TYPICAL RMS NOISE, CS5521/23 (Notes 10 and 11)
Input Range, (Bipolar/Unipolar Mode)
Output Rate -3 dB Filter
(Hz)
1.88
3.76
7.51
15.0
30.0
Frequency
25 mV
90 nV
55 mV
148 nV
182 nV
267 nV
440 nV
1.1 µV
4.9 µV
27 µV
100 mV
220 nV
310 nV
435 nV
810 nV
2.1 µV
8.5 µV
43 µV
1 V
2.5 V
3.9 µV
5.7 µV
8.5 µV
14 µV
5 V
1.64
3.27
6.55
12.7
25.4
50.4
70.7
84.6
1.8 µV
2.6 µV
3.7 µV
5.7 µV
18.2 µV
92 µV
7.8 µV
11.3 µV
18.1 µV
28 µV
122 nV
180 nV
280 nV
580 nV
2.6 µV
11 µV
48 µV
96 µV
61.6 (Note 12)
84.5 (Note 12)
101.1 (Note 12)
238 µV
1.1 mV
3.4 mV
390 µV
2.4 mV
6.7 mV
458 µV
1.2 mV
41 µV
72 µV
130 µV
Notes: 10. Wideband noise aliased into the baseband. Referred to the input. Typical values shown for 25° C.
11. To estimate Peak-to-Peak Noise, multiply RMS noise by 6.6 for all ranges and output rates.
12. For input ranges <100 mV and output rates ≥60 Hz, 16.384 kHz chopping frequency is used.
TYPICAL NOISE FREE RESOLUTION (BITS), CS5521/23 (Note 13)
Input Range, (Bipolar Mode)
Output Rate -3 dB Filter
(Hz)
1.88
3.76
7.51
15.0
30.0
Frequency
25 mV
16
16
15
15
14
12
9
55 mV
16
16
16
15
14
12
9
100 mV
1 V
16
16
16
16
14
12
9
2.5 V
16
16
16
16
14
12
9
5 V
16
16
16
16
14
12
9
1.64
3.27
6.55
12.7
25.4
50.4
70.7
84.6
16
16
16
15
14
12
9
61.6 (Note 12)
84.5 (Note 12)
101.1 (Note 12)
8
8
8
8
8
8
Notes: 13. For bipolar mode, the number of bits of Noise Free Resolution is LOG((2XInput Range)/(6.6xRMS
Noise))/LOG(2) rounded to the nearest bit. For unipolar mode, the number of bits of Noise Free
Resolution is LOG((Input Range)/(6.6xRMS Noise))/LOG(2) rounded to the nearest bit. Also, the
CS5521/23’s output conversions are 16 bits. Noise free Resolution numbers are based upon
VREF = 2.5 V and XIN = 32.768 kHz. The values will be affected directly by changes in VREF, but the
effects due to changes in the XIN frequency will be minor.
DS317F2
7
CIRRUS [ CIRRUS LOGIC ]
