Datasheet

REGISTER DETAILS
INA209
www.ti.com ......................................................................................................................................................... SBOS403B – JUNE 2007 – REVISED MARCH 2009
All INA209 registers are 16-bit registers. 16-bit register data are sent in two 8-bit bytes via the I
2
C interface.
Configuration Register 00h (Read/Write)
BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
BIT
RST — BRNG PG1 PG0 BADC4 BADC3 BADC2 BADC1 SADC4 SADC3 SADC2 SADC1 MODE3 MODE2 MODE1
NAME
POR
0 0 1 1 1 0 0 1 1 0 0 1 1 1 1 1
VALUE
Bit Descriptions
RST: Reset Bit
Bit 15 Setting this bit to '1' generates a system reset that is the same as power-on reset. Resets all registers to default
values; this bit self-clears.
BRNG: Bus Voltage Range
Bit 13 0 = 16V FSR
1 = 32V FSR (default value)
PG: PGA (Shunt Voltage Only)
Bits 11, 12 Sets PGA gain and range. Note that the PGA defaults to ÷ 8 (320mV range). Table 3 shows the gain and range for
the various product gain settings.
Table 3. PG Bit Settings
(1)
PG1 PG0 GAIN RANGE
0 0 1 ± 40mV
0 1 ÷ 2 ± 80mV
1 0 ÷ 4 ± 160mV
1 1 ÷ 8 ± 320mV
(1) Shaded values are default.
BADC: BADC Bus ADC Resolution/Averaging
Bits 7 – 10 These bits adjust the Bus ADC resolution (9-, 10-, 11-, or 12-bit) or set the number of samples used when
averaging results for the Bus Voltage Register (04h).
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