INA240-Q1 Datasheet, PDF (1/10 Pages) Texas Instruments – Current-Sense Amplifier

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INA240-Q1
SBOS808 – AUGUST 2016
INA240-Q1 Automotive, Wide Common-Mode Range, Voltage Output, High- or Low-Side
Bidirectional, Zero-Drift, Current-Sense Amplifier With Enhanced PWM Rejection
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C5
• 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
• Gain Error: 0.25% (Maximum) With 10 ppm/°C
Maximum Drift
• Offset Voltage: ±100 μV With 0.3 μV/°C Maximum
Drift
• Available Gains:
– INA240A1-Q1: 20 V/V
– INA240A2-Q1: 50 V/V
– INA240A3-Q1: 100 V/V
– INA240A4-Q1: 200 V/V
• Quiescent Current: 2.5 mA (Maximum)
2 Applications
• Electronic Power Steering
• Stability Control
• Traction Control
• Motor and Actuator Control
• Solenoid and Valve Control
3 Description
The INA240-Q1 device is a automotive-qualified,
voltage-output, current-sense amplifier family 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-Q1
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
300
280
260
240
220
200
180
160
140
120
100
80
60
40
20
0
-20
-40
-1
Enhanced PWM Rejection
Common Mode Step
INA240 Vout
0
1
2
3
4
5
6
7
8
Time(uS)
8
7.2
6.4
5.6
4.8
4
3.2
2.4
1.6
0.8
0
-0.8
-1.6
-2.4
-3.2
-4
-4.8
-5.6
9
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.