SLYS022A June 2020 – June 2021 INA228-Q1
PRODUCTION DATA
The INA228-Q1 noise performance and effective resolution depend on the ADC conversion time. The device also supports digital averaging which can further help decrease digital noise. The flexibility of the device to select ADC conversion time and data averaging offers increased signal-to-noise ratio and achieves the highest dynamic range with lowest offset. The profile of the noise at lower signals levels is dominated by the system noise that is comprised mainly of 1/f noise or white noise. The INA228-Q1 effective resolution of the ADC can be increased by increasing the conversion time and increasing the number of averages.
Table 8-2 summarizes the output data rate conversion settings supported by the device. The fastest conversion setting is 50 µs. Typical noise-free resolution is represented as Effective Number of Bits (ENOB) based on device measured data. The ENOB is calculated based on noise peak-to-peak values, which assures that full noise distribution is taken into consideration.
| ADC CONVERSION TIME PERIOD [µs] | OUTPUT SAMPLE AVERAGING [SAMPLES] | OUTPUT SAMPLE PERIOD [ms] | NOISE-FREE ENOB (±163.84-mV) (ADCRANGE = 0) | NOISE-FREE ENOB (±40.96-mV) (ADCRANGE = 1) |
|---|---|---|---|---|
| 50 | 1 | 0.05 | 12.4 | 10.4 |
| 84 | 0.084 | 12.6 | 10.4 | |
| 150 | 0.15 | 13.3 | 11.4 | |
| 280 | 0.28 | 13.8 | 11.8 | |
| 540 | 0.54 | 14.2 | 12.4 | |
| 1052 | 1.052 | 14.5 | 12.6 | |
| 2074 | 2.074 | 15.3 | 13.3 | |
| 4120 | 4.12 | 16.0 | 13.8 | |
| 50 | 4 | 0.2 | 13.1 | 11.4 |
| 84 | 0.336 | 13.9 | 11.8 | |
| 150 | 0.6 | 14.3 | 12.2 | |
| 280 | 1.12 | 14.9 | 12.8 | |
| 540 | 2.16 | 15.1 | 13.0 | |
| 1052 | 4.208 | 15.8 | 13.8 | |
| 2074 | 8.296 | 16.1 | 14.3 | |
| 4120 | 16.48 | 16.5 | 14.4 | |
| 50 | 16 | 0.8 | 13.9 | 12.3 |
| 84 | 1.344 | 14.7 | 12.9 | |
| 150 | 2.4 | 15.1 | 13.0 | |
| 280 | 4.48 | 15.8 | 13.7 | |
| 540 | 8.64 | 16.3 | 14.3 | |
| 1052 | 16.832 | 16.5 | 14.6 | |
| 2074 | 33.184 | 17.1 | 15.3 | |
| 4120 | 65.92 | 17.7 | 15.9 | |
| 50 | 64 | 3.2 | 15.0 | 13.3 |
| 84 | 5.376 | 15.9 | 13.8 | |
| 150 | 9.6 | 16.4 | 14.4 | |
| 280 | 17.92 | 16.9 | 14.5 | |
| 540 | 34.56 | 17.7 | 15.3 | |
| 1052 | 67.328 | 17.7 | 15.9 | |
| 2074 | 132.736 | 18.1 | 16.3 | |
| 4120 | 263.68 | 18.7 | 16.5 | |
| 50 | 128 | 6.4 | 15.5 | 13.4 |
| 84 | 10.752 | 16.3 | 14.3 | |
| 150 | 19.2 | 16.9 | 14.7 | |
| 280 | 35.84 | 17.1 | 15.2 | |
| 540 | 69.12 | 18.1 | 15.9 | |
| 1052 | 134.656 | 18.1 | 16.4 | |
| 2074 | 265.472 | 18.7 | 16.9 | |
| 4120 | 527.36 | 19.7 | 17.1 | |
| 50 | 256 | 12.8 | 15.5 | 14.4 |
| 84 | 21.504 | 16.7 | 14.7 | |
| 150 | 38.4 | 17.4 | 15.3 | |
| 280 | 71.68 | 17.7 | 15.7 | |
| 540 | 138.24 | 18.7 | 16.1 | |
| 1052 | 269.312 | 18.7 | 16.7 | |
| 2074 | 530.944 | 19.7 | 17.4 | |
| 4120 | 1054.72 | 19.7 | 17.7 | |
| 50 | 512 | 25.6 | 16.7 | 14.3 |
| 84 | 43 | 17.4 | 15.4 | |
| 150 | 76.8 | 17.7 | 15.5 | |
| 280 | 143.36 | 18.7 | 16.3 | |
| 540 | 276.48 | 18.7 | 16.5 | |
| 1052 | 538.624 | 19.7 | 17.4 | |
| 2074 | 1061.888 | 19.7 | 17.7 | |
| 4120 | 2109.44 | 19.7 | 18.7 | |
| 50 | 1024 | 51.2 | 17.1 | 15.0 |
| 84 | 86.016 | 17.7 | 15.9 | |
| 150 | 153.6 | 18.1 | 16.0 | |
| 280 | 286.72 | 18.7 | 16.9 | |
| 540 | 552.96 | 19.7 | 17.1 | |
| 1052 | 1077.248 | 19.7 | 17.7 | |
| 2074 | 2123.776 | 19.7 | 18.1 | |
| 4120 | 4218.88 | 20 | 18.7 |