INA240 Datasheet, PDF (1/8 Pages) Texas Instruments – Wide Common-Mode Range, Voltage Output High- or Low-Side Bidirectional, Zero-Drift, Current-Shunt Monitor

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INA240
SBOS662 – JULY 2016
INA240 Wide Common-Mode Range, Voltage Output,
High- or Low-Side Bidirectional, Zero-Drift, Current-Shunt Monitor
1 Features
•1 Enhanced PWM Rejection
• Excellent CMRR
– > 120-dB DC CMRR
– 93-dB AC CMRR at 50 kHz
• Wide Common-Mode Range: –4 V to 80 V
• Accuracy:
– Gain:
– Gain Error: 0.25% (max)
– Gain Drift: 10 ppm/°C (max)
– Offset:
– Offset Voltage: ±100 μV
– Offset Drift: 0.3 μV/°C (max)
• Available Gains:
– INA240A1: 20 V/V
– INA240A2: 50 V/V
– INA240A3: 100 V/V
– INA240A4: 200 V/V
• Quiescent Current: 2.5 mA (max)
2 Applications
• Motor Controls
• Solenoid and Valve Controls
• Power Management
• Actuator Controls
• Pressure Regulators
• Telecom Equipment
3 Description
The INA240 is a voltage-output, current-sense
amplifier with enhanced PWM rejection that can
sense drops across shunt resistors over a wide
common-mode voltage range from –4 V to 80 V,
independent of the supply voltage. The negative
common-mode voltage allows the device to operate
below ground, accommodating the flyback period of
typical solenoid applications. Enhanced PWM
rejection provides high levels of suppression for large
common-mode transients (dV/dt) in systems that use
pulse width modulation (PWM) signals (such as motor
drives and solenoid control systems). This feature
allows for accurate current measurements without
large transients and associated recovery ripple on the
output voltage.
This device operates from a single 2.7-V to 5.5-V
power supply, drawing a maximum of 2.5 mA of
supply current. Four fixed gains are available: 20 V/V,
50 V/V, 100 V/V, and 200 V/V. The low offset of the
zero-drift architecture enables current sensing with
maximum drops across the shunt as low as 10-mV
full-scale. All versions are specified over the extended
operating temperature range (–40°C to +125°C), and
are offered in an 8-pin TSSOP package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA240
TSSOP (8)
3.00 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
Supply
(2.7V to 5.5V)
IN-
+
OUT
IN+
REF1
REF2
Enhanced PWM Rejection
300
8
Common Mode Step
280
INA240 Vout
7.2
260
6.4
240
5.6
220
4.8
200
4
180
3.2
160
2.4
140
1.6
120
0.8
100
0
80
-0.8
60
-1.6
40
-2.4
20
-3.2
0
-4
-20
-4.8
-40
-5.6
-1
0
1
2
3
4
5
6
7
8
9
Time(uS)
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCT PREVIEW Information. Product in design phase of
development. Subject to change or discontinuance without notice.