ADS9316 datasheet(28/70 Pages) TI2

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Table 6-6. Simple Average Initialization Sequence for Non-continuous CONVST (continued)

Step

Description

Wait 100μs.

Provide 2 additional pulses of CONVST.

Figure 6-14 illustrates the timing to enable simple averaging for an average of 2 samples with a noncontinuous

CONVST with default timing.

ENABLE SIMPLE

AVERAGE

SCLK

SDI

CONVST

AVG_SYNC = 1

ADC DATA

(S1 + S2) / 2

ADC DATA

(S3 + S4) / 2

Wait 100µs

Figure 6-14. Simple Average Enable Sequence Timing with Noncontinuous CONVST for Average of 2

Samples

ADS931x also supports simple averaging with noncontinuous CONVST in low latency mode. Figure 6-15

illustrates the timing for implementing simple averaging with a noncontinuous CONVST signal in low latency

mode.

ENABLE SIMPLE

AVERAGE

SCLK

SDI

CONVST

AVG_SYNC = 1

ADC DATA

(S1 + S2) / 2

ADC DATA

(S3 + S4) / 2

tconv+tLOW_LAT

Wait 100µs

Figure 6-15. Simple Average Enable Sequence Timing with Noncontinuous CONVST in Low Latency

Mode

6.3.5.2 Moving Average

To enable moving data averaging, select the averaging window size by writing to MAVG_MODE in address

0x0D. in register bank 1. The moving average window size is user-selectable between 2, 4, and 8 conversions.

Table 6-7 specifies the improvement in SNR with moving data averaging. Figure 6-16 illustrates the ADC output

timing for a moving average of four samples.

Table 6-7. Moving Average - ADC Output Data Rate and SNR vs Data Averaging

OVERSAMPLING RATIO

SNR - ADS9317 (18-BIT)

MAXIMUM OUTPUT DATA RATE

No averaging

95.4dB

5MSPS

98.5dB

5MSPS

ADS9316, ADS9317

SBASAX4 – JUNE 2026

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