Datasheet

INA219
www.ti.com SBOS448F –AUGUST 2008– REVISED SEPTEMBER 2011
SADC: SADC Shunt ADC Resolution/Averaging
Bits 3–6 These bits adjust the Shunt ADC resolution (9-, 10-, 11-, or 12-bit) or set the number of samples used when
averaging results for the Shunt Voltage Register (01h).
BADC (Bus) and SADC (Shunt) ADC resolution/averaging and conversion time settings are shown in Table 6.
Table 6. ADC Settings
(1)
ADC4 ADC3 ADC2 ADC1 MODE/SAMPLES CONVERSION TIME
0 X
(2)
0 0 9-bit 84μs
0 X
(2)
0 1 10-bit 148μs
0 X
(2)
1 0 11-bit 276μs
0 X
(2)
1 1 12-bit 532μs
1 0 0 0 12-bit 532μs
1 0 0 1 2 1.06ms
1 0 1 0 4 2.13ms
1 0 1 1 8 4.26ms
1 1 0 0 16 8.51ms
1 1 0 1 32 17.02ms
1 1 1 0 64 34.05ms
1 1 1 1 128 68.10ms
(1) Shaded values are default.
(2) X = Don't care.
MODE: Operating Mode
Bits 0–2 Selects continuous, triggered, or power-down mode of operation. These bits default to continuous shunt and bus
measurement mode. The mode settings are shown in Table 7.
Table 7. Mode Settings
(1)
MODE3 MODE2 MODE1 MODE
0 0 0 Power-Down
0 0 1 Shunt Voltage, Triggered
0 1 0 Bus Voltage, Triggered
0 1 1 Shunt and Bus, Triggered
1 0 0 ADC Off (disabled)
1 0 1 Shunt Voltage, Continuous
1 1 0 Bus Voltage, Continuous
1 1 1 Shunt and Bus, Continuous
(1) Shaded values are default.
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