INA293-Q1
INA293-Q1
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SBOS870A – MAY 2019 – REVISED SEPTEMBER 2020
SBOS870A – MAY 2019 – REVISED SEPTEMBER 2020
INA293-Q1, AEC-Q100, –4-V to 110-V, 1-MHz, Ultra-Precise Current Sense Amplifier
1 Features
3 Description
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AEC-Q100 qualified for automotive applications
– Temperature grade 1: –40 °C to +125 °C, TA
Functional Safety-Capable
– Documentation available to aid functional safety
system design
Wide common-mode voltage:
– Operational voltage: −4 V to +110 V
– Survival voltage: −20 V to +120 V
Excellent CMRR:
The INA293-Q1 is a ultra-precise current sense
amplifier that can measure voltage drops across shunt
resistors over a wide common-mode range from –4 V
to 110 V. The negative common-mode voltage allows
the device to operate below ground, thus
accommodating precise measurement of recirculating
currents in half-bridge applications. The combination
of a low offset voltage, small gain error and high DC
CMRR enables highly accurate current measurement.
The INA293-Q1 is not only designed for DC current
measurement, but also for high-speed applications
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– 160-dB DC-CMRR
– 85-dB AC-CMRR at 50 kHz
Accuracy:
(ex. Fast over-current protection) with
a
high
bandwidth of 1.3 MHz and an 85-dB AC CMRR (at 50
kHz).
– Gain:
•
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Gain error: ±0.15% (maximum)
Gain drift: ±10 ppm/ °C (maximum)
The INA293-Q1 operates from a single 2.7-V to 20-V
supply, drawing 1.5 mA of supply current. The
INA293-Q1 is available with five gain options: 20 V/V,
50 V/V, 100 V/V, 200 V/V, and 500 V/V. These gain
options address wide dynamic range current-sensing
applications.
– Offset:
•
•
Offset voltage: ±15 µV (typical)
Offset drift: ±0.05 µV/ °C (typical)
•
Available gains:
The INA293-Q1 is specified over an operating
temperature range of −40 °C to +125 °C and is
offered in a space-saving SOT-23 package with two
pin-out variants.
– INA293A1-Q1, INA293B1-Q1 : 20 V/V
– INA293A2-Q1, INA293B2-Q1 : 50 V/V
– INA293A3-Q1, INA293B3-Q1 : 100 V/V
– INA293A4-Q1, INA293B4-Q1 : 200 V/V
– INA293A5-Q1, INA293B5-Q1 : 500 V/V
High bandwidth: 1.3 MHz
Device Information (1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
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INA293-Q1
SOT-23 (5)
2.90 mm × 1.60 mm
Slew rate: 2.5 V/µs
Quiescent current: 1.5 mA
(1) For all available packages, see the package option
addendum at the end of the data sheet.
2 Applications
VS
VCM
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48-V automotive
Solenoid control
48-V DC/DC converter
Valve control
ISENSE
R1
IN+
+
Current
RSENSE
Bias
Feedback
R1
OUT
-
INœ
Buffer
Load
RL
GND
Functional Block Diagram
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. PRODUCTION DATA.
Copyright © 2020 Texas Instruments Incorporated
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