ina219 datasheet

INA219
www.ti.com SBOS448G –AUGUST 2008–REVISED DECEMBER 2015
7.5 Electrical Characteristics:
At T
A
= 25°C, V
S
= 3.3 V, V
IN+
= 12V, V
SHUNT
= (V
IN+
– V
IN–
) = 32 mV, PGA = /1, and BRNG
(1)
= 1, unless otherwise noted.
INA219A INA219B
PARAMETER TEST CONDITIONS UNIT
MIN TYP MAX MIN TYP MAX
INPUT
PGA = /1 0 ±40 0 ±40 mV
PGA = /2 0 ±80 0 ±80 mV
Full-scale current sense (input) voltage
V
SHUNT
range
PGA = /4 0 ±160 0 ±160 mV
PGA = /8 0 ±320 0 ±320 mV
BRNG = 1 0 32 0 32 V
Bus voltage (input voltage) range
(2)
BRNG = 0 0 16 0 16 V
CMRR Common-mode rejection V
IN+
= 0 to 26 V 100 120 100 120 dB
PGA = /1 ±10 ±100 ±10 ±50
(4)
μV
PGA = /2 ±20 ±125 ±20 ±75
(4)
μV
Offset voltage, RTI
(3)
V
OS
PGA = /4 ±30 ±150 ±30 ±75
(4)
μV
PGA = /8 ±40 ±200 ±40 ±100
(4)
μV
vs Temperature T
A
= –25°C to 85°C 0.1 0.1 μV/°C
PSRR vs Power Supply V
S
= 3 to 5.5 V 10 10 μV/V
Current sense gain error ±40 ±40 m%
vs Temperature T
A
= –25°C to 85°C 1 1 m%/°C
IN+ pin input bias current Active mode 20 20 μA
IN– pin input bias current || V
IN–
pin input μA ||
Active mode 20 || 320 20 || 320
impedance kΩ
IN+ pin input leakage
(5)
Power-down mode 0.1 ±0.5 0.1 ±0.5 μA
IN– pin input leakage
(5)
Power-down mode 0.1 ±0.5 0.1 ±0.5 μA
DC ACCURACY
ADC basic resolution 12 12 bits
Shunt voltage, 1 LSB step size 10 10 μV
Bus voltage, 1 LSB step size 4 4 mV
±0.3%
(
Current measurement error ±0.2% ±0.5% ±0.2%
4)
±0.5%
(
over Temperature T
A
= –25°C to 85°C ±1%
4)
Bus voltage measurement error ±0.2% ±0.5% ±0.2% ±0.5%
over Temperature T
A
= –25°C to 85°C ±1% ±1%
Differential nonlinearity ±0.1 ±0.1 LSB
ADC TIMING
12 bit 532 586 532 586 μs
11 bit 276 304 276 304 μs
ADC conversion time
10 bit 148 163 148 163 μs
9 bit 84 93 84 93 μs
Minimum convert input low time 4 4 μs
SMBus
SMBus timeout
(6)
28 35 28 35 ms
DIGITAL INPUTS (SDA as Input, SCL, A0, A1)
Input capacitance 3 3 pF
Leakage input current 0 ≤ V
IN
≤ V
S
0.1 1 0.1 1 μA
V
IH
input logic level 0.7 (V
S
) 6 0.7 (V
S
) 6 V
V
IL
input logic level –0.3 0.3 (V
S
) –0.3 0.3 (V
S
) V
(1) BRNG is bit 13 of the Configuration register 00h in Figure 19.
(2) This parameter only expresses the full-scale range of the ADC scaling. In no event should more than 26 V be applied to this device.
(3) Referred-to-input (RTI)
(4) Indicates 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.
(6) SMBus timeout in the INA219 resets the interface any time SCL or SDA is low for over 28 ms.
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