INA293 Amplifier Datasheet

INA293 Datasheet, PDF, Equivalent


Part Number

INA293

Description

High-Precision Current Sense Amplifier

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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INA293
SBOS470 – DECEMBER 2019
INA293 –4-V to 110-V, 1-MHz, High-Precision Current Sense Amplifier
1 Features
1 Wide common-mode voltage:
– Operational voltage: 4 V to +110 V
– Survival voltage: 20 V to +120 V
• Excellent CMRR:
– 160-dB DC-CMRR
– 85-dB AC-CMRR at 50 kHz
• Accuracy:
– Gain:
– Gain error: ±0.15% (maximum)
– Gain drift: ±10 ppm/°C (maximum)
– Offset:
– Offset voltage: ±15 µV (typical)
– Offset drift: ±0.05 µV/°C (typical)
• Available gains:
– INA293A1, INA293B1 : 20 V/V
– INA293A2, INA293B2 : 50 V/V
– INA293A3, INA293B3 : 100 V/V
– INA293A4, INA293B4 : 200 V/V
– INA293A5, INA293B5 : 500 V/V
• High bandwidth: 1.3 MHz
• Slew rate: 2.5 V/µs
• Quiescent current: 1.5 mA
2 Applications
Active antenna system mMIMO (AAS)
Macro remote radio unit (RRU)
48-V rack server
48-V merchant network & server power supply
(PSU)
48-V battery management systems (BMS)
3 Description
The INA293 is a high-precision 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 is not only designed for
DC current measurement, but also for high-speed
applications (ex. Fast over-current protection) with a
high bandwidth of 1.3 MHz and an 85-dB AC CMRR
(at 50 kHz).
The INA293 operates from a single 2.7-V to 20-V
supply, drawing 1.5 mA of supply current. The
INA293 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.
The INA293 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA293
SOT-23 (5)
2.90 mm × 1.60 mm
(1) For all available packages, see the package option addendum
at the end of the data sheet.
Functional Block Diagram
VCM
VS
ISENSE
IN+
R1
RSENSE
IN±
Bias
R1
Load
+
Current
Feedback
-
Buffer
RL
OUT
GND
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. PRODUCTION DATA.

INA293
INA293
SBOS470 – DECEMBER 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 3
6.1 Absolute Maximum Ratings ...................................... 3
6.2 ESD Ratings.............................................................. 3
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 4
6.6 Typical Characteristics .............................................. 6
7 Detailed Description ............................................ 12
7.1 Overview ................................................................. 12
7.2 Functional Block Diagram ....................................... 12
7.3 Feature Description................................................. 12
7.4 Device Functional Modes........................................ 14
8 Application and Implementation ........................ 15
8.1 Application Information............................................ 15
8.2 Typical Application .................................................. 17
9 Power Supply Recommendations...................... 18
10 Layout................................................................... 19
10.1 Layout Guidelines ................................................. 19
10.2 Layout Example .................................................... 19
11 Device and Documentation Support ................. 20
11.1 Documentation Support ........................................ 20
11.2 Receiving Notification of Documentation Updates 20
11.3 Support Resources ............................................... 20
11.4 Trademarks ........................................................... 20
11.5 Electrostatic Discharge Caution ............................ 20
11.6 Glossary ................................................................ 20
12 Mechanical, Packaging, and Orderable
Information ........................................................... 20
4 Revision History
DATE
December 2019
REVISION
*
NOTES
Initial release
2 Submit Documentation Feedback
Product Folder Links: INA293
Copyright © 2019, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity INA293 SBOS470 – DECEMBER 201 9 INA293 –4-V to 110-V, 1-MHz, High-P recision Current Sense Amplifier 1 Fea tures •1 Wide common-mode voltage: Operational voltage: −4 V to +110 V – Survival voltage: −20 V to +120 V • Excellent CMRR: – 160-dB DC-CMR R – 85-dB AC-CMRR at 50 kHz • Accur acy: – Gain: – Gain error: ±0.15% (maximum) – Gain drift: ±10 ppm/°C (maximum) – Offset: – Offset voltag e: ±15 µV (typical) – Offset drift: ±0.05 µV/°C (typical) • Available gains: – INA293A1, INA293B1 : 20 V/V – INA293A2, INA293B2 : 50 V/V – IN A293A3, INA293B3 : 100 V/V – INA293A4 , INA293B4 : 200 V/V – INA293A5, INA2 93B5 : 500 V/V • High bandwidth: 1.3 MHz • Slew rate: 2.5 V/µs • Quiesc ent current: 1.5 mA 2 Applications • Active antenna system mMIMO (AAS) • M acro remote radio unit (RRU) • 48-V r ack server • 48-V merchant network & server power supply (PSU) • 48-V battery management systems (BMS) 3 Description The INA293 i.
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