Datasheet
ELECTRICAL CHARACTERISTICS: V
S
= +3.3V
INA209
www.ti.com
......................................................................................................................................................... SBOS403B – JUNE 2007 – REVISED MARCH 2009
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.
INA209
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT
Full-Scale Current Sense (Input) Voltage Range PGA = ÷ 1 0 ± 40 mV
PGA = ÷ 2 0 ± 80 mV
PGA = ÷ 4 0 ± 160 mV
PGA = ÷ 8 0 ± 320 mV
Bus Voltage (Input Voltage) Range
(2)
BRNG = 1 0 32 V
BRNG = 0 0 16 V
Common-Mode Rejection CMRR V
IN+
= 0V to 26V 100 120 dB
Offset Voltage, RTI
(3)
V
OS
PGA = ÷ 1 ± 10 ± 100 µ V
PGA = ÷ 2 ± 20 ± 125 µ V
PGA = ÷ 4 ± 30 ± 150 µ V
PGA = ÷ 8 ± 40 ± 200 µ V
vs Temperature 0.1 µ V/ ° C
vs Power Supply PSRR V
S
= 3V to 5.5V 10 µ V/V
Current Sense Gain Error ± 40 m%
vs Temperature 10 ppm/ ° C
Input Impedance Active Mode
V
IN+
Pin 20 µ A
V
IN –
Pin 20 || 320 µ A || k Ω
Input Leakage Power-Down Mode
V
IN+
Pin 0.1 ± 0.5 µ A
V
IN –
Pin 0.1 ± 0.5 µ A
DC ACCURACY
ADC Basic Resolution 12 Bits
1 LSB Step Size
Shunt Voltage 10 µ V
Bus Voltage 4 mV
Current Measurement Error ± 0.2 ± 0.5 %
over Temperature ± 1 %
Bus Voltage Measurement Error ± 0.2 ± 0.5 %
over Temperature ± 1 %
Differential Nonlinearity ± 0.1 LSB
Critical DAC Full-Scale Range 255 mV
Critical DAC Accuracy ± 0.5 ± 1 %
Critical DAC Resolution 8 Bits
Critical DAC 1 LSB Step Size 1 mV
Critical DAC Comparator Offset ± 0.3 ± 1.6 mV
Critical DAC Comparator Hysteresis
(4)
See
(4)
Critical DAC Comparator Delay 5 µ s
(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) User-programmable. See the Critical Comparator and Register sections.
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