Datasheet

INA219
www.ti.com SBOS448F –AUGUST 2008– REVISED SEPTEMBER 2011
ELECTRICAL CHARACTERISTICS: V
S
= +3.3V
Boldface limits apply over the specified temperature range, T
A
= –25°C to +85°C.
At T
A
= +25°C, V
IN+
= 12V, V
SENSE
= (V
IN+
– V
IN–
) = 32mV, PGA = ÷ 1, and BRNG
(1)
= 1, unless otherwise noted.
INA219A INA219B
PARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP MAX UNIT
INPUT
Full-Scale Current Sense (Input) Voltage Range PGA = ÷ 1 0 ±40 0 ±40 mV
PGA = ÷ 2 0 ±80 0 ±80 mV
PGA = ÷ 4 0 ±160 0 ±160 mV
PGA = ÷ 8 0 ±320 0 ±320 mV
Bus Voltage (Input Voltage) Range
(2)
BRNG = 1 0 32 0 32 V
BRNG = 0 0 16 0 16 V
Common-Mode Rejection CMRR V
IN+
= 0V to 26V 100 120 100 120 dB
Offset Voltage, RTI
(3)
V
OS
PGA = ÷ 1 ±10 ±100 ±10 ±50
(4)
μV
PGA = ÷ 2 ±20 ±125 ±20 ±75 μV
PGA = ÷ 4 ±30 ±150 ±30 ±75 μV
PGA = ÷ 8 ±40 ±200 ±40 ±100 μV
vs Temperature 0.1 0.1 μV/°C
vs Power Supply PSRR V
S
= 3V to 5.5V 10 10 μV/V
Current Sense Gain Error ±40 ±40 m%
vs Temperature 1 1 m%/°C
Input Impedance Active Mode
V
IN+
Pin 20 20 μA
V
IN–
Pin 20 || 320 20 || 320 μA || kΩ
Input Leakage
(5)
Power-Down Mode
V
IN+
Pin 0.1 ±0.5 0.1 ±0.5 μA
V
IN–
Pin 0.1 ±0.5 0.1 ±0.5 μA
DC ACCURACY
ADC Basic Resolution 12 12 Bits
1 LSB Step Size
Shunt Voltage 10 10 μV
Bus Voltage 4 4 mV
Current Measurement Error ±0.2 ±0.5 ±0.2 ±0.3 %
over Temperature ±1 ±0.5 %
Bus Voltage Measurement Error ±0.2 ±0.5 ±0.2 ±0.5 %
over Temperature ±1 ±1 %
Differential Nonlinearity ±0.1 ±0.1 LSB
ADC TIMING
ADC Conversion Time 12-Bit 532 586 532 586 μs
11-Bit 276 304 276 304 μs
10-Bit 148 163 148 163 μs
9-Bit 84 93 84 93 μs
Minimum Convert Input Low Time 4 4 μs
(1) BRNG is bit 13 of the Configuration Register.
(2) This parameter only expresses the full-scale range of the ADC scaling. In no event should more than 26V be applied to this device.
(3) Referred-to-input (RTI).
(4) Shaded cells indicate improved specifications of the INA219B.
(5) Input leakage is positive (current flowing into the pin) for the conditions shown at the top of the table. Negative leakage currents can
occur under different input conditions.
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