SBAS824 Data sheet

SBAS824 October 2018 ADS1235

PRODUCTION DATA.

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)

RHB|32

Thermal pad, mechanical data (Package|Pins)

Orderable Information

8.3.7.4 50-Hz and 60-Hz Normal Mode Rejection

To reduce 50-Hz and 60-Hz noise interference, configure the data rate and filter to reject noise at 50 Hz and 60 Hz. Table 5 summarizes the 50-Hz and 60-Hz noise rejection versus data rate and filter mode. The table values are based on 2% and 6% tolerance of signal frequency to ADC clock frequency. For the sinc filter, increase noise rejection by increasing the order of the filter. Common-mode noise is also rejected at these frequencies.

Table 5. 50-Hz and 60-Hz Normal Mode Rejection

DATA RATE (SPS)	FILTER TYPE	DIGITAL FILTER RESPONSE (dB)
DATA RATE (SPS)	FILTER TYPE	50 Hz ±2%	60 Hz ±2%	50 Hz ±6%	60 Hz ±6%
2.5	FIR	–113	–99	–88	–80
2.5	Sinc1	–36	–37	–40	–37
2.5	Sinc2	–72	–74	–80	–74
2.5	Sinc3	–108	–111	–120	–111
2.5	Sinc4	–144	–148	–160	–148
5	FIR	–111	–95	–77	–76
5	Sinc1	–34	–34	–30	–30
5	Sinc2	–68	–68	–60	–60
5	Sinc3	–102	–102	–90	–90
5	Sinc4	–136	–136	–120	–120
10	FIR	–111	–94	–73	–68
10	Sinc1	–34	–34	–25	–25
10	Sinc2	–68	–68	–50	–50
10	Sinc3	–102	–102	–75	–75
10	Sinc4	–136	–136	–100	–100
16.6	Sinc1	–34	–21	–24	–21
16.6	Sinc2	–68	–42	–48	–42
16.6	Sinc3	–102	–63	–72	–63
16.6	Sinc4	–136	–84	–96	–84
20	FIR	–95	–94	–66	–66
20	Sinc1	–18	–34	–18	–24
20	Sinc2	–36	–68	–36	–48
20	Sinc3	–54	–102	–54	–72
20	Sinc4	–72	–136	–72	–96
50	Sinc1	–34	–15	–24	–15
50	Sinc2	–68	–30	–48	–30
50	Sinc3	–102	–45	–72	–45
50	Sinc4	–136	–60	–96	–60
60	Sinc1	–13	–34	–12	–24
60	Sinc2	–27	–68	–24	–48
60	Sinc3	–40	–102	–36	–72
60	Sinc4	–53	–136	–48	–96