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INA220 Datasheet(PDF) 3 Page - Texas Instruments |
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INA220 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 35 page  ELECTRICAL CHARACTERISTICS: VS = +3.3V INA220 www.ti.com ............................................................................................................................................................. SBOS459B – JUNE 2009 – REVISED JUNE 2009 Boldface limits apply over the specified temperature range, TA = –25°C to +85°C. At TA = +25°C, VIN+ = 12V, VSENSE = (VIN+ – VIN–) = 32mV, VBUS = 12V, PGA = ÷ 1, and BRNG (1) = 1, unless otherwise noted. INA220 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 VIN+ = 0V to 26V 100 120 dB Offset Voltage, RTI(3) VOS PGA = ÷ 1 ±10 ±100 µV PGA = ÷ 2 ±20 ±125 µV PGA = ÷ 4 ±30 ±150 µV PGA = ÷ 8 ±40 ±200 µV vs Temperature 0.1 µV/°C vs Power Supply PSRR VS = 3V to 5.5V 10 µV/V Current Sense Gain Error ±40 m% vs Temperature 10 ppm/°C Input Impedance Active Mode VIN+ Pin 20 µA VIN– Pin 20 µA VBUS Pin (4) 320 k Ω Input Leakage(5) Power-Down Mode VIN+ Pin 0.1 ±0.5 µA VIN– Pin 0.1 ±0.5 µA DC ACCURACY ADC Basic Resolution 12 Bits 1LSB Step Size Shunt Voltage 10 µV Bus Voltage 4 mV Current Measurement Error ±0.2 ±0.5 % over Temperature ±1 % Bus Voltage Measurement Error VBUS = 12V ±0.2 ±0.5 % over Temperature ±1 % Differential Nonlinearity ±0.1 LSB ADC TIMING ADC Conversion Time 12-Bit 532 586 µs 11-Bit 276 304 µs 10-Bit 148 163 µs 9-Bit 84 93 µs Minimum Convert Input Low Time 4 µs SMBus SMBus Timeout(6) 28 35 ms (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) The input impedance of this pin may vary approximately ±15%. (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 INA220 resets the interface any time SCL or SDA is low for over 28ms. Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): INA220 |
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