INA225-Q1 Monitor Datasheet

INA225-Q1 Datasheet, PDF, Equivalent


Part Number

INA225-Q1

Description

High-Speed Current-Shunt Monitor

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download INA225-Q1 Datasheet


INA225-Q1
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INA225-Q1
SBOS728 – FEBRUARY 2015
INA225-Q1 Automotive-Grade, 36-V Programmable-Gain, Voltage-Output, Bidirectional,
Zero-Drift, High-Speed Current-Shunt Monitor
1 Features
1 AEC-Q100 Qualified:
– Temperature Grade 1: –40°C to +125°C
– HBM ESD Classification 2
– CDM ESD Classification C4B
• Wide Common-Mode Range: 0 V to 36 V
• Offset Voltage: ±150 μV (Max, All Gains)
• Offset Voltage Drift: 0.5 μV/°C (Max)
• Gain Accuracy, Over Temperature (Max):
– 25 V/V, 50 V/V: ±0.15%
– 100 V/V: ±0.2%
– 200 V/V: ±0.3%
– 10-ppm/°C Gain Drift
• Bandwidth: 250 kHz (Gain = 25 V/V)
• Programmable Gains:
– G1 = 25 V/V
– G2 = 50 V/V
– G3 = 100 V/V
– G4 = 200 V/V
• Quiescent Current: 350 μA (Max)
• Package: VSSOP-8
2 Applications
• Automotive Lighting
• Body Control Module
• Motor Control
• Valve Control
• Cluster
• Central Control Module
3 Description
The INA225-Q1 is a voltage-output, current-sense
amplifier that senses drops across current-sensing
resistors at common-mode voltages that vary from 0
V to 36 V, independent of the supply voltage. The
device is a bidirectional, current-shunt monitor that
allows an external reference to be used to measure
current flowing in both directions across a current-
sensing resistor.
Four discrete gain levels are selectable using the two
gain-select terminals (GS0 and GS1) to program
gains of 25 V/V, 50 V/V, 100 V/V, and 200 V/V. The
low-offset, zero-drift architecture and precision gain
values enable current-sensing with maximum drops
across the shunt as low as 10 mV of full-scale, while
maintaining very high accuracy measurements over
the entire operating temperature range.
The device operates from a single +2.7-V to +36-V
power supply, drawing a maximum of 350 μA of
supply current. The device is specified over the
extended operating temperature range of –40°C to
+125°C, and is offered in a VSSOP-8 package.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA225-Q1
VSSOP (8)
3.00 mm x 3.00 mm
(1) For all available packages, see the package option addendum
at the end of the data sheet.
RSHUNT
Load
5-V Supply
INA225
IN-
IN+
-
+
VS
OUT
GAIN SELECT
GS0 GS1
GND
GND
VS
VS
GND
VS
GND
VS
GAIN
25
50
100
200
GS0
GS1
REF
GND
CBYPASS
0.1µ F
ADC
Microcontroller
GPIO
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.

INA225-Q1
INA225-Q1
SBOS728 – FEBRUARY 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 ............................................ 13
7.1 Overview ................................................................. 13
7.2 Functional Block Diagram ....................................... 13
7.3 Feature Description................................................. 13
7.4 Device Functional Modes........................................ 16
8 Applications and Implementation ...................... 19
8.1 Application Information............................................ 19
8.2 Typical Applications ................................................ 19
9 Power Supply Recommendations...................... 25
10 Layout................................................................... 25
10.1 Layout Guidelines ................................................. 25
10.2 Layout Example .................................................... 25
11 Device and Documentation Support ................. 26
11.1 Related Documentation ....................................... 26
11.2 Trademarks ........................................................... 26
11.3 Electrostatic Discharge Caution ............................ 26
11.4 Glossary ................................................................ 26
12 Mechanical, Packaging, and Orderable
Information ........................................................... 26
4 Revision History
DATE
February 2015
REVISION
*
NOTES
Initial release.
2 Submit Documentation Feedback
Product Folder Links: INA225-Q1
Copyright © 2015, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community INA225-Q1 SBOS728 – FEBRUA RY 2015 INA225-Q1 Automotive-Grade, 36- V Programmable-Gain, Voltage-Output, Bi directional, Zero-Drift, High-Speed Cur rent-Shunt Monitor 1 Features •1 AEC -Q100 Qualified: – Temperature Grade 1: –40°C to +125°C – HBM ESD Clas sification 2 – CDM ESD Classification C4B • Wide Common-Mode Range: 0 V to 36 V • Offset Voltage: ±150 μV (Ma x, All Gains) • Offset Voltage Drift: 0.5 μV/°C (Max) • Gain Accuracy, O ver Temperature (Max): – 25 V/V, 50 V /V: ±0.15% – 100 V/V: ±0.2% – 200 V/V: ±0.3% – 10-ppm/°C Gain Drift • Bandwidth: 250 kHz (Gain = 25 V/V) • Programmable Gains: – G1 = 25 V/V – G2 = 50 V/V – G3 = 100 V/V – G 4 = 200 V/V • Quiescent Current: 350 μA (Max) • Package: VSSOP-8 2 Applic ations • Automotive Lighting • Body Control Module • Motor Control • V alve Control • Cluster • Central Control Module 3 Description The INA225-Q1 is a voltage-output, current-sense amplifier that.
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