Typical rms noise, cs5522/24/28, Typical noise free resolution (bits), cs5522/24/28 – Cirrus Logic CS5528 User Manual
Page 8
CS5521/22/23/24/28
8
DS317F8
TYPICAL RMS NOISE, CS5522/24/28
Notes: 14. Wideband noise aliased into the baseband. Referred to the input. Typical values shown for 25° C.
15. To estimate Peak-to-Peak Noise, multiply RMS noise by 6.6 for all ranges and output rates.
16. For input ranges <100 mV and output rates
≥60 Sps, 16.384 kHz chopping frequency is used.
TYPICAL NOISE FREE RESOLUTION (BITS), CS5522/24/28
(Note 17)
Notes: 17. 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
CS5522/24/28’s output conversions are 24 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.
Output Rate
(Sps)
-3 dB Filter
Frequency
Input Range, (Bipolar/Unipolar Mode)
25 mV
55 mV
100 mV
1 V
2.5 V
5 V
1.88
1.64
90 nV
95 nV
140 nV
1.5 µV
3 µV
6 µV
3.76
3.27
110 nV
130 nV
190 nV
2 µV
4 µV
8 µV
7.51
6.55
170 nV
200 nV
275 nV
2.5 µV
6 µV
11.5 µV
15.0
12.7
250 nV
330 nV
580 nV
4.5 µV
10 µV
20 µV
30.0
25.4
500 nV
1 µV
1.5 µV
16 µV
45 µV
85 µV
61.6 (Note 16)
50.4
2 µV
4 µV
8 µV
72 µV
195 µV
350 µV
84.5 (Note 16)
70.7
10 µV
20 µV
35 µV
340 µV
900 µV
2 mV
101.1 (Note 16)
84.6
30 µV
60 µV
105 µV
1.1 mV
3 mV
5.3 mV
Output Rate
(Sps)
-3 dB Filter
Frequency
Input Range, (Bipolar Mode)
25 mV
55 mV
100 mV
1 V
2.5 V
5 V
1.88
1.64
16
17
18
18
18
18
3.76
3.27
16
17
17
17
18
18
7.51
6.55
15
16
17
17
17
17
15.0
12.7
15
16
16
16
16
16
30.0
25.4
14
14
14
14
14
14
61.6 (Note 16)
50.4
12
12
12
12
12
12
84.5 (Note 16)
70.7
10
10
10
10
10
10
101.1 (Note 16)
84.6
8
8
8
8
8
8