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INA2227 Datasheet(PDF) 28 Page - Texas Instruments

Part # INA2227
Description  INA2227 48V, Dual Channel, 16-Bit, Current, Voltage, Power, and Energy Monitor With an I2C Interface
PDF  43 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

INA2227 Datasheet(HTML) 28 Page - Texas Instruments

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The energy values can be read from the each ENERGY register as a 32-bit unsigned value. Use Equation 5 to
convert the energy to Joules:
Energy [J] = 32 x CURRENT_LSB x ENERGY
(5)
where
• ENERGY is the value read from the each ENERGY register.
• CURRENT_LSB is chosen lsb size for the selected channel.
8.1.3 ADC Output Data Rate and Noise Performance
The INA2227 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 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 140µs. 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 verifies that full
noise distribution is taken into consideration.
Table 8-2. INA2227 Noise performance, current measurement, single channel enabled
ADC CONVERSION
TIME PERIOD [µs]
OUTPUT SAMPLE
AVERAGING
[SAMPLES]
OUTPUT SAMPLE PERIOD
[ms]
NOISE-FREE ENOB
(±81.92mV) (ADCRANGE =
0)
NOISE-FREE ENOB
(±20.48mV) (ADCRANGE =
1)
140
1
0.14
13.1
11.1
204
1
0.204
13.4
11.1
332
1
0.332
14.1
11.7
588
1
0.588
14.7
12.2
1100
1
1.1
14.7
12.5
2116
1
2.116
15.1
13.4
4156
1
4.156
15.7
14.1
8244
1
8.244
16.0
14.7
140
4
0.56
14.1
12.1
204
4
0.816
14.4
12.4
332
4
1.328
15.1
12.9
588
4
2.352
15.7
13.4
1100
4
4.4
15.7
13.7
2116
4
8.464
16.0
14.7
4156
4
16.624
16.0
14.7
8244
4
32.976
16.0
15.7
140
16
2.24
15.1
13.1
204
16
3.264
15.7
13.4
332
16
5.312
15.7
14.1
588
16
9.408
16.0
14.4
1100
16
17.6
16.0
15.1
2116
16
33.856
16.0
15.7
INA2227
SBOSAL5 – JUNE 2025
www.ti.com
28
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Copyright © 2025 Texas Instruments Incorporated
Product Folder Links: INA2227



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