INA250A1 Monitor Datasheet

INA250A1 Datasheet PDF, Equivalent


Part Number

INA250A1

Description

Zero-Drift Current-Shunt Monitor

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download INA250A1 Datasheet


INA250A1
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INA250A1, INA250A2, INA250A3, INA250A4
SBOS511B – APRIL 2015 – REVISED DECEMBER 2015
INA250 36-V, Low- or High-Side, Bidirectional, Zero-Drift
Current-Shunt Monitor with Precision Integrated Shunt Resistor
1 Features
1 Precision Integrated Shunt Resistor:
– Shunt Resistor: 2 mΩ
– Shunt Resistor Tolerance: 0.1% (Max)
– 15 A Continuous from –40°C to 85°C
– 0°C to 125°C Temperature Coefficient:
10 ppm/°C
• High Accuracy:
– Gain Error (Shunt and Amplifier): 0.3% (Max)
– Offset Current: 50 mA (Max, INA250A2)
• Four Available Gains:
– INA250A1: 200 mV/A
– INA250A2: 500 mV/A
– INA250A3: 800 mV/A
– INA250A4: 2 V/A
• Wide Common-Mode Range: –0.1 V to 36 V
• Specified Operating Temperature: –40°C to 125°C
2 Applications
• Test Equipment
• Power Supplies
• Servers
• Telecom Equipment
• Automotive
• Solar Inverters
• Power Management
3 Description
The INA250 is a voltage-output, current-sensing
amplifier family that integrates an internal shunt
resistor to enable high-accuracy current
measurements at common-mode voltages that can
vary from 0 V to 36 V, independent of the supply
voltage. The device is a bidirectional, low- or high-
side current-shunt monitor that allows an external
reference to be used to measure current flowing in
both directions through the internal current-sensing
resistor sensor. The integration of the precision
current-sensing resistor provides calibration
equivalent measurement accuracy with ultra-low
temperature drift performance and ensures an
optimized Kelvin layout for the sensing resistor is
always obtained.
The INA250 family is available in four output voltage
scales: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A.
This device is fully tested and specified for
continuous currents up to 10 amps at the maximum
temperature of 125°C. The INA250 operates from a
single 2.7-V to 36-V supply and draws a maximum of
300 µA of supply current. All INA250 gain versions
are specified over the extended operating
temperature range (–40°C to 125°C), and are
available in a TSSOP-16 package.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA250A1
INA250A2
INA250A3
TSSOP (16)
5.00 mm × 4.40 mm
INA250A4
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Power Rail
(0 V to 36 V)
Simplified Schematic
Device Supply
(2.7 V to 36 V)
CBYPASS
0.1 PF
IN+ SH+
VIN+
VS
REF
OUT
IN SH
Load
VIN
GND
ADC
Microcontroller
ADC
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.

INA250A1
INA250A1, INA250A2, INA250A3, INA250A4
SBOS511B – APRIL 2015 – REVISED DECEMBER 2015
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......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 7
7 Detailed Description ............................................ 12
7.1 Overview ................................................................. 12
7.2 Functional Block Diagram ....................................... 12
7.3 Feature Description................................................. 12
7.4 Device Functional Modes........................................ 15
8 Applications and Implementation ...................... 19
8.1 Application Information............................................ 19
8.2 Typical Applications ................................................ 19
9 Power Supply Recommendations...................... 23
10 Layout................................................................... 24
10.1 Layout Guidelines ................................................. 24
10.2 Layout Examples................................................... 24
11 Device and Documentation Support ................. 26
11.1 Documentation Support ....................................... 26
11.2 Related Links ........................................................ 26
11.3 Community Resources.......................................... 26
11.4 Trademarks ........................................................... 26
11.5 Electrostatic Discharge Caution ............................ 26
11.6 Glossary ................................................................ 26
12 Mechanical, Packaging, and Orderable
Information ........................................................... 26
4 Revision History
Changes from Revision A (May 2015) to Revision B
Page
• Released INA250A1, INA250A3, and INA250A4 to production ............................................................................................. 1
• Added TI Design .................................................................................................................................................................... 1
• Added parameters for INA250A1, INA250A3, and INA250A4 to Electrical Characteristics table.......................................... 5
• Added ± to specifications for the Shunt short time overload, Shunt thermal shock, Shunt resistance to solder heat,
Shunt high temperature exposure, and Shunt cold temperature storage parameters of Electrical Characteristics table...... 5
• Added curves for INA250A1, INA250A3, and INA250A4 to Typical Characteristics section ................................................ 7
• Added Amplifier Operation section ...................................................................................................................................... 15
• Added Community Resources section ................................................................................................................................. 26
Changes from Original (April 2015) to Revision A
Page
• INA250A2 released to production........................................................................................................................................... 1
2 Submit Documentation Feedback
Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: INA250A1 INA250A2 INA250A3 INA250A4


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design INA250A1, INA250A2, INA250A3, INA250A4 SBOS511B APRIL 2015 – REVISED DECEMBER 2015 INA250 36-V, Low- or High-Side, Bidire ctional, Zero-Drift Current-Shunt Monit or with Precision Integrated Shunt Resi stor 1 Features •1 Precision Integra ted Shunt Resistor: – Shunt Resistor: 2 mΩ – Shunt Resistor Tolerance: 0. 1% (Max) – 15 A Continuous from –40 °C to 85°C – 0°C to 125°C Tempera ture Coefficient: 10 ppm/°C • High A ccuracy: – Gain Error (Shunt and Ampl ifier): 0.3% (Max) – Offset Current: 50 mA (Max, INA250A2) • Four Availabl e Gains: – INA250A1: 200 mV/A – INA 250A2: 500 mV/A – INA250A3: 800 mV/A – INA250A4: 2 V/A • Wide Common-Mod e Range: –0.1 V to 36 V • Specified Operating Temperature: –40°C to 125 °C 2 Applications • Test Equipment Power Supplies • Servers • Telec om Equipment • Automotive • Solar Inverters • Power Management 3 Description The INA250 is a voltage-output, current-s.
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