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INA290 Datasheet(PDF) 1 Page - Texas Instruments

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Part # INA290
Description  INA290 2.7-V to 120-V, 1.1-MHz, Ultra-Precise Current-Sense Amplifier in Small (SC-70) Package
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

INA290 Datasheet(HTML) 1 Page - Texas Instruments

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ADC
IN+
IN±
OUT
V
BUS
+
±
Buffer
Current
Feedback
V
S
GND
RL
R1
R1
Bias
Load
R
SENSE
I
SENSE
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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.
INA290
SBOS961 – JUNE 2020
INA290 2.7-V to 120-V, 1.1-MHz, Ultra-Precise Current-Sense Amplifier in Small (SC-70)
Package
1
1 Features
1
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
Gain:
Gain error: ±0.1% (maximum)
Gain drift: ±5 ppm/°C (maximum)
Offset:
Offset voltage: ±12 µV (maximum)
Offset drift: ±0.2 µV/°C (maximum)
Available gains:
INA290A1: 20 V/V
INA290A2: 50 V/V
INA290A3: 100 V/V
INA290A4: 200 V/V
INA290A5: 500 V/V
High bandwidth: 1.1 MHz
Slew rate: 2 V/µs
Quiescent current: 370 µA
2 Applications
Active antenna system mMIMO (AAS)
Macro remote radio unit (RRU)
48-V rack server
48-V merchant network & server power supply
Test and measurement
3 Description
The
INA290
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. It is in a highly space-efficient
SC-70 package with a PCB footprint of only 2.0 mm ×
2.1 mm. 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 INA290 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
MHz (at gain of 20 V/V) and a 85-dB AC CMRR (at
50 kHz).
The INA290 operates from a single 2.7-V to 20-V
supply and draws a 370-µA supply current (typical).
The INA290 is 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).
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA290
SC-70 (5)
2.00 mm × 1.25 mm
(1) For all available packages, see the package option addendum
at the end of the data sheet.
Typical Application


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