INA290, INA2290
INA290, INA2290
www.ti.com
SBOS961B – JUNE 2020 – REVISED DECEMBER 2020
SBOS961B – JUNE 2020 – REVISED DECEMBER 2020
INAx290 2.7-V to 120-V, 1.1-MHz, Ultra-Precise Current Sense Amplifier
1 Features
3 Description
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Wide common-mode voltage:
– Operational voltage: 2.7 V to 120 V
– Survival voltage: −20 V to +122 V
Excellent CMRR:
– 160-dB DC
– 85-dB AC at 50 kHz
Accuracy
The INAx290 is an ultra-precise current sense
amplifier that can measure voltage drops across shunt
resistors over a wide common-mode range from 2.7 V
to 120 V. The ultra-precise current measurement
accuracy is achieved thanks to the combination of an
ultra-low offset voltage of ±12 µV (maximum), a small
gain error of ±0.1% (maximum), and a high DC CMRR
of 160 dB (typical). The INAx290 is not only designed
for DC current measurement, but also for high-speed
applications (like fast overcurrent protection, for
example) with a high bandwidth of 1.1 MHz (at gain of
20 V/V) and an 85-dB AC CMRR (at 50 kHz).
– Gain:
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Gain error: ±0.1% (maximum)
Gain drift: ±5 ppm/°C (maximum)
– Offset:
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Offset voltage: ±12 µV (maximum)
Offset drift: ±0.2 µV/°C (maximum)
The INAx290 provides the capability to make ultra-
precise current measurements by sensing the voltage
drop across a shunt resistor over a wide common-
mode range from 2.7 V to 120 V. The INAx290
devices come in highly space-efficient packages. The
single channel INA290 device is featured in the SC-70
package while the dual channel INA2290 device is
available in the VSSOP-8 package.
•
Available gains:
– A1 devices: 20 V/V
– A2 devices: 50 V/V
– A3 devices: 100 V/V
– A4 devices: 200 V/V
– A5 devices: 500 V/V
High bandwidth: 1.1 MHz
Slew rate: 2 V/µs
The INAx290 operates from a single 2.7-V to 20-V
supply with the single channel device only drawing
370-µA supply current per channel (typical). The
devices are available with five gain options: 20 V/V,
50 V/V, 100 V/V, 200 V/V, and 500 V/V. The low offset
of the zero-drift architecture enables current sensing
with low ohmic shunts as specified over the extended
operating temperature range (−40 °C to +125 °C).
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Quiescent current: 370 µA(per channel)
2 Applications
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Active antenna system mMIMO (AAS)
Macro remote radio unit (RRU)
48-V rack server
48-V merchant network & server power supply
Test and measurement
Device Information
PART NUMBER
INA290
INA2290
PACKAGE(1)
BODY SIZE (NOM)
2.00 mm × 1.25 mm
3.00 mm × 3.00 mm
SC-70 (5)
VSSOP (8)
VS
VCM
INA2290 (dual channel)
INA290 (single channel)
(1) For all available packages, see the package option
addendum at the end of the data sheet.
ISENSE
R1
R1
IN+
œ
Current
Feedback
RSENSE
Bias
+
OUT
INœ
Buffer
SAR
ADC
Load
RL
GND
Typical Application
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.
Product Folder Links: INA290 INA2290
Copyright © 2020 Texas Instruments Incorporated
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