Datasheet

Data Sheet AD7176-2
Rev. A | Page 15 of 68
NOISE PERFORMANCE AND RESOLUTION
Table 6 shows the rms noise and the noise free (peak-to-peak)
resolution of the AD7176-2 for various output data rates and
filters. The numbers given are for the bipolar input range with
an external 5 V reference.
These numbers are typical and are generated with a differential
input voltage of 0 V when the ADC is continuously converting
on a single channel. It is important to note that the peak-to-
peak resolution is calculated based on the peak-to-peak noise.
The peak-to-peak resolution represents the resolution for which
there is no code flicker.
Table 6. RMS Noise and Peak-to-Peak Resolution vs. Output Data Rate
1
Sinc5 + Sinc1 Filter (Default) Sinc3 Filter
Output Data Rate (SPS)
Noise (µV rms)
Peak-to-Peak Resolution (Bits)
Noise (µV rms)
Peak-to-Peak Resolution (Bits)
250,000 9.7 17.2 220 12.8
62,500 5.4 18.2 5.1 18.3
10,000 2.5 19 1.8 19.8
1000 0.82 20.8 0.62 21
60 0.46 21.4 0.32 22
50 0.42 21.7 0.31 22
16.7 0.42 21.7 0.29 22.4
5 0.32 22.2 0.29 22.4
1
Selected rates only, 1000 samples.