INA240-Q1_17 Datasheet, PDF (1/34 Pages) Texas Instruments – Automotive, Wide Common-Mode Range, High- and Low-Side, Bidirectional, Zero-Drift, Current-Sense Amplifier With Enhanced PWM Rejection

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INA240-Q1
SBOS808A – AUGUST 2016 – REVISED DECEMBER 2016
INA240-Q1 Automotive, Wide Common-Mode Range, High- and 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 Temperature Grade 0: –40°C to
+150°C Ambient Operating Temperature
Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C5
• Enhanced PWM Rejection
• Excellent CMRR:
– 132-dB DC CMRR
– 93-dB AC CMRR at 50 kHz
• Wide Common-Mode Range: –4 V to 80 V
• Accuracy:
– Gain Error: 0.20% (Maximum) With 2.5 ppm/°C
(Maximum Drift)
– Offset Voltage: ±25 μV (Maximum) With 250
nV/°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
2 Applications
• Electronic Power Steering
• Stability and Traction Control
• Motor and Actuator Control
• Solenoid and Valve Control
Typical Application
Supply
(2.7V to 5.5V)
IN-
+
OUT
IN+
REF1
REF2
3 Description
The INA240-Q1 device is an automotive-qualified,
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
(ΔV/Δt) 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 2.4 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. Grade 1 versions are specified over the
extended operating temperature range (–40°C to
+125°C) and are offered in an 8-pin TSSOP and 8-
pin SOIC packages. Grade 0 versions are specified
over the extended operating temperature range
(–40°C to +150°C) and are offered in an 8-pin SOIC
package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA240-Q1
TSSOP (8) - Grade
1 only
SOIC (8) - Grade 0
and 1
3.00 mm × 4.40 mm
4.00 mm × 3.91 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Enhanced PWM Rejection
227700
Y2140
240
221100
180
115800
150
120
90
60
30
0
-30
3.5
3
2.5
2
1.5
Common-Mode Step
INA240 OUT
1
0.5
Time (2 µs/div)
03.50
Y1
-0.53
2.5
-1 ₂
-11.5.5
D004
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.