Part: Texas Instruments INA225

Type: Programmable-Gain, Voltage-Output, Bidirectional, Zero-Drift Series, Current-Shunt Monitor

Description: The INA225 is a 0 V to 36 V common-mode, programmable-gain current-shunt monitor with ±150 μV maximum offset voltage, 0.5 μV/°C maximum offset voltage drift, and 350 μA maximum quiescent current.

Operating Conditions:

• Supply voltage: +2.7 V to +36 V
• Operating temperature: -40°C to +125°C
• Common-mode input range: 0 V to 36 V
• Programmable Gains: 25 V/V, 50 V/V, 100 V/V, 200 V/V

Absolute Maximum Ratings:

• Max supply voltage: +40 V
• Max junction temperature: +150 °C
• Max storage temperature: +150 °C

Key Specs:

• Offset voltage, RTI: ±150 μV (Max, V SENSE = 0 mV)
• Offset voltage drift: 0.5 μV/°C (Max, T A = -40°C to +125°C)
• Gain error (G = 25 V/V, 50 V/V): ±0.15% (Max, T A = -40°C to +125°C)
• Gain error vs temperature (G = 25 V/V, 50 V/V, 100 V/V): 10 ppm/°C (Max, T A = -40°C to +125°C)
• Quiescent current: 350 μA (Max, V SENSE = 0 mV)
• Bandwidth (Gain = 25 V/V): 250 kHz (Typ, C LOAD = 10 pF)
• Common-mode rejection: 105 dB (Typ, V IN+ = 0 V to +36 V, T A = -40°C to +125°C)
• Power-supply rejection ratio: ±1 μV/V (Max, V S = 2.7 V to 36 V)

Features:

• Wide Common-Mode Range: 0 V to 36 V
• Offset Voltage: ±150 μV (Max, All Gains)
• Offset Voltage Drift: 0.5 μV/°C (Max)
• Gain Accuracy, Over Temperature (Max): ±0.15% (25 V/V, 50 V/V), ±0.2% (100 V/V), ±0.3% (200 V/V)
• 10-ppm/°C Gain Drift
• 250-kHz Bandwidth (Gain = 25 V/V)
• Programmable Gains: 25 V/V, 50 V/V, 100 V/V, 200 V/V
• Quiescent Current: 350 μA (Max)

Applications:

• Power Supplies
• Motor Control
• Computers
• Telecom Equipment
• Power Management
• Test and Measurement

Package:

• MSOP-8 (3.0 mm x 3.0 mm)

• 1 · Wide Common-Mode Range: 0 V to 36 V
• Offset Voltage: ±150 μ V (Max, All Gains)
• Offset Voltage Drift: 0.5 μ V/°C (Max)
• Gain Accuracy, Over Temperature (Max):
• -25 V/V, 50 V/V: ±0.15%
• -100 V/V: ±0.2%
• -200 V/V: ±0.3%
• -10-ppm/°C Gain Drift
• 250-kHz Bandwidth (Gain = 25 V/V)
• Programmable Gains:
• -G1 = 25 V/V
• -G2 = 50 V/V
• -G3 = 100 V/V
• -G4 = 200 V/V
• Quiescent Current: 350 μ A (Max)
• Package: MSOP-8

• Power Supplies
• Motor Control
• Computers
• Telecom Equipment
• Power Management
• Test and Measurement

1

INA225AIDGKR Pinout — 8-TSSOP/MSOP Package

Notes

• Gain Selection: GS0 and GS1 control the programmable gain (25 V/V, 50 V/V, 100 V/V, or 200 V/V) per Table 3 in the datasheet.
• Common-Mode Range: 0 V to 36 V, independent of supply voltage.
• Supply Voltage: 2.7 V to 36 V (absolute maximum 40 V).
• Offset Voltage: ±150 μV maximum across all gains.
• Quiescent Current: 350 μA maximum.
• Operating Temperature: −40°C to +125°C.

At TA = +25°C, VSENSE = VIN+ - VIN, VS = +5 V, VIN+ = 12 V, and VREF = VS / 2, unless otherwise noted.

Over operating free-air temperature range, unless otherwise noted.

Over operating free-air temperature range, unless otherwise noted.

The INA225 measures the voltage developed across a current-sensing resistor when current passes through it. The ability to drive the reference terminal to adjust the functionality of the output signal offers multiple configurations discussed throughout this section.