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INA250:
36-V, Low-/High-Side, Bi-Directional, Zero-Drift Current
Sense Amp with Precision Integrated Shunt Resistor
June 12, 2015
Q100 Release Forecast in 1Q16
INA250
36-V, Low-/High-Side, Bi-Directional, Zero-Drift Current Sense Amp w/ Precision Int. Shunt Resistor
Features
Benefits
• Precision Integrated Shunt Resistor:
• Shunt Resistor: 2 mΩ
• Complete current sense solution
• Smaller and more accurate than amplifier and external
shunt
• Eliminates error due to tolerance and layout of external
shunt
• 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
• Gain Error (Shunt and Amplifier): 0.75% (Max)
• Common-Mode Range: –0.1 to +36V
• Available gains:
• 200mV/A (1V Full-Scale Range)
• 500mV/A (2.5V Full-Scale Range)
• 800mV/A (4V Full-Scale Range)
• 1V/A (10V Full-Scale Range)
Applications
•
•
•
•
•
•
Automotive
Power Supply
Test & Measurement Equipment
Telecom infrastructure
Solar Inverters
Server
Package: TSSOP-16 (5 x 6.5mm)
INA250
36-V, Low-/High-Side, Bi-Directional, Zero-Drift Current Sense Amp w/ Precision Int. Shunt Resistor
Features
Discovery
Questions
Pricing &
Availability
• 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): 0.75% Max Over
Temperature (0.3% Max @ 25°C)
• Offset Current: 15 mA (Max, INA250A4)
• Four Gain Options:
• INA250A1: 200 mV/A
• INA250A2: 500 mV/A
• INA250A3: 800 mV/A
• INA250A4: 2 V/A
4Q15
Released
4Q15
4Q15
INA250
36-V, Low-/High-Side, Bi-Directional, Zero-Drift Current Sense Amp w/ Precision Int. Shunt Resistor
Features
Discovery
Questions
Pricing &
Availability
•
How precision do you need your current measurement obtain
– what level of error is acceptable for your application?
•
What value is the shunt resistor you are using? What
tolerance and temperature co–efficient does your shunt have?
•
What is the current range of the signal you are looking to
monitor?
•
Are you sacrificing desired precision due to the cost of the
shunt resistor needed to achieve that level of precision?
INA250
36-V, Low-/High-Side, Bi-Directional, Zero-Drift Current Sense Amp w/ Precision Int. Shunt Resistor
Features
Discovery
Questions
Pricing
Availability
Resources
Product Info: INA250
Pricing 1Ku: See TI.com for current pricing
Availability:
– Fully released (INA250A2)
– Evaluation Boards: INA250EVM
– TI Designs: Coming Soon!
– Models:
– PSpice Model
– TINA-TI Reference Design
– TINA-TI Spice Model
– Datasheet: INA250
Additional resources:
Support (E2E): Current Shunt Monitors Fourm
INA250
36-V, Low-/High-Side, Bi-Directional, Zero-Drift Current Sense Amp w/ Precision Int. Shunt Resistor
• Why were these parts developed?
1. Customers who must have very high-precision, low-drift measurements
and conduct significant calibration efforts on the system to achieve their
goal
• The INA250 enables this level of system performance while minimizing or
eliminating the calibration effort
2. Customers who have sacrificed their desired level of precision due to the
cost of the shunt resistor required to achieve the goal
• The INA250 offers a price point that will more the threshold of pain
associated with discrete, high-precision, low-drift shunt resistors
• What differentiates this part?
– The INA250 is the first current sense amplifier to integrate a high
precision (0.1% tolerance), low-drift (15 ppm/°C) shunt resistor offering
a Kelvin connection to the shunt resistor
Current & Power Monitoring:
Common Mode Voltage < 60V
New
Existing
Roadmap
Q100 Option
Available
Q100 in
Development
INA250
Integrated 0.1% 2mΩ Shunt
–0.1V to +36V CMR
Available Gains:
200, 500, 800, 1000 mV/A
TSSOP-16
INA3221
Accuracy & Features
LMP92064
Low-side Voltage and
Current Monitor
Simultaneous Sampling
-0.2V to +2V CMR
60uV Offset
QFN-16
INA209
Bidirectional
0V to +26V CMR
100uV Offset
DAC + Comparators
Triple Channel Shunt &
Bus Voltage Monitor
0V to +26V CMR
Programmable Alerts
QFN-16
INA226
Bidirectional
(High / Low Side)
Power Monitoring
0V to +36V CMR
10uV Offset
MSOP-10
INA231
INA220
Bidirectional Power
Monitoring
0V to +26V CMR
50uV (B) / 100μV (A)
Offset
MSOP
Bidirectional
(High / Low Side)
Power Monitoring
0V to +28V CMR
50uV Offset
1.8V Complaint I2C I/F
1.68x1.43mm WCSP–12
INA219
INA230
Bidirectional (High-Side)
Power Monitoring
0V to +26V CMR
50uV (B) / 100μV (A)
Offset
SOT-23, SOIC-8
Bidirectional
(High / Low Side)
Power Monitoring
0V to +28V CMR
50uV Offset
QFN-16
Digital Output
LMP8640 / 8645
–2V to 42V CMR
900uV → 1000uV Offset
Gain: Adj, 20, 50, 100V/V,
TSOT-6
INA225
INA300
Programmable Gain:
25, 50, 100, 200 V/V
0V to +36V CMR
125uV Offset
MSOP-8
Current Sense Comparator
Programmable Threshold
10μs Response Time
0V to +36V CMR
QFN–10
INA210 – 215
INA223
Bidirectional
-0.3V to 26V CMR
35uV → 100uV Offset
Gain: 50, 75, 100, 200,
500V, 1000 V/V
SC70
Power Monitoring
Programmable Gain
0V to +26V CMR
100uV Offset
SON-10
INA199
INA216
Bidirectional
-0.3V to 26V CMR
150uV Offset
Gain: 50, 100, 200 V/V
SOT-23
1.8V to 5.5VCMR
75uV Offset
Gain: 25, 50, 100, 200V/V
0.8 x 0.8mm CSP
INA138 – 139
2.7V to +36V CMR
1mV Offset
BW: INA138 = 800kHz
INA139 = 440 kHz
SOT-23
LMP8278Q
–2V to 40V CMR
2mV Offset
Gain: 14V/V
MSOP-8
Voltage Output
Current Output
EXISTING
NEW Q1
ROADMAP
Current Sense AEC–Q100 Portfolio
Digital Output
INA220B
Bidirectional
(High / Low Side)
Power Monitoring
0V to +26V CMR
50uV Offset
MSOP-10 Package
INA226
Bidirectional
(High / Low Side)
Power Monitoring
0V to +36V CMR
10uV Offset
MSOP-10
Over–Current
Comparator
INA300
Over-Current Comparator
0V to 36V CMR
TRESP = 10µs
Single Resistor Alert Setting
MSOP-10 Package
General Purpose Voltage Output
INA225
Bidirectional
0V to +36V CMR
Programmable Gain: 25, 50,
100, 200V/V
150uV Offset
MSOP-8 Package
INA21x Family
Bidirectional
-0.3V to 26V CMR
Low Offset & Zero Drift
Q1 Gains Avail:
50, 100, 1000 V/V
Q1 Gains Planned:
75, 200, 500 V/V
SC70-6 Package
INA199
Bidirectional
-0.3V to 26V CMR
150 µV Voffset & Zero Drift
Gains Planned:
50, 100, 200 V/V
SC70-6 Package
INA301
Over-Current Comparator
w/ Analog Voltage Out
0V to 36V CMR
TRESP = 10µs
Single Resistor Alert Setting
MSOP-10 Package
INA250
Integrated Shunt
10A Current Sense
0V to 36V CMR
0.75% Accuracy Over
Temperature
LMP8640
–2V to 42V CMR
900uV → 1000uV Offset
Gain: Adj, 20, 50, 100V/V,
TSOT-6
LMP8278
-2V to +40V CMR
2mV Offset
Gain : 14V/V
MSOP-8 Package
High Common Mode Voltage
INA28x Family
-14V to +80V CMR
Ultra Low Offset
Zero Drift
Q1 Gain Avail: 50V/V
Q1 Gain Plan:
100, 200, 500, 1000
SOIC-8, MSOP-8 Packages
INA193 - 198
-16V to +80V CMR
2mV Offset
Gain: 20V/V, 50V/V,
100V/V
Dual Pinout Options
SOT23-5 Package
INA270 & INA271
-16V to +80V CMR
2.5mV Offset
Gain: 14V/V & 20 V/V
SOIC-8 Package
LMP8601-LMP8603
Bidirectional
-22V to +60V CMR
1mV Offset
Gain : 20, 50, 100 V/V
SOIC-8, MSOP-8 Packages
INA240
High-speed
Large Input Swings
-4V to +80V CMR
100µV Offset
Gain : 20, 50, 100V/V
MSOP-8 Package
INA200-202
-16V to +80V CMR
2.5mV Offset
Gain: 20V/V, 50V/V,
100V/V
Shunt Monitor, Comparator
& Reference
MSOP-8 Package
INA203
-16V to +80V CMR
2.5mV Offset
Gain: 20V/V, 50V/V,
100V/V
Shunt Monitor, Dual
Comparator & Reference
TSSOP-14 Package
Current Output
INA138
INA139
2.7V to +36V CMR
2mV Offset
BW: 440kHz
TSSOP-8
2.7V to +36V CMR
2mV Offset
BW: 80 KHz
TSSOP-8
INA168
2.7V to +60V CMR
2mV Offset
BW: 440kHz
SOT23-5, TSSOP-8
INA169
2.7V to +60V CMR
2mV Offset
BW: 440kHz
TSSOP-8
What Does A Current Shunt Resistor Look Like?
Packaging Comparison – To Scale
0805
1206
1210
2010
0.1% 2mΩ 3637
(50ppm/°C)
2512
INA250
INA250
TSSOP-16
SC70
SOT23
QFN-10
MSOP
0.5% 2mΩ 2512
(50ppm/°C)
0.1% 2mΩ
(25ppm/°C)
SOIC
$2 - $4 Resistor
10
Minimum Available Resistance Values (In mΩ)
Tolerance
0.1%
0.5%
1%
5%
0402
10Ω
10Ω
10mΩ
10mΩ
0603
2.21Ω
20mΩ
5mΩ
10mΩ
0805
2Ω
5mΩ
2mΩ
2mΩ
1206/1210
4.7Ω
10mΩ
1mΩ
1mΩ
2010
4.7Ω
10mΩ
1mΩ
1mΩ
2512
3mΩ
1mΩ
0.3mΩ
1mΩ
3637
2mΩ
1mΩ
1mΩ
-
Package Size
Common & Available - Budgetary Pricing
Package
Tolerance (%)
Resistance (mΩ)
1k Pricing ($)
0603
1
10
0.05
0805
1
2
0.17
1206
1
1
0.09
2010
1
1
0.18
2512
1
1
0.15
0603
0.5
20
0.64
0805
0.5
5
0.76
1206
0.5
10
0.24
2010
0.5
10
0.39
2512
0.5
1
0.86
3637
0.1
2
4.31
Resistor
Value
%
Size
Cost
(1ku)
Amplifier
VOS
Gain
Error
Cost
(1ku)
10A Input
Error
Total
Cost
10mΩ
1%
603
$0.04
MAX44284
21µV
0.15%
$0.93
1.01%
$0.97
2mΩ
1%
805
$0.16
MAX44284
21µV
0.15%
$0.93
1.02%
$1.09
1mΩ
1%
1206
$0.09
MAX44284
21µV
0.15%
$0.93
1.03%
$1.02
10mΩ
1%
603
$0.04
INA210
35µV
1%
$0.75
1.42%
$0.79
2mΩ
1%
805
$0.16
INA210
35µV
1%
$0.75
1.43%
$0.91
INA210
1mΩ
1%
1206
$0.09
INA210
35µV
1%
$0.75
1.46%
$0.84
0603
Precision Amplifier & Average Resistor
0.10%
-
-
INA250A2
50mA
0.20%
-
0.55%
$1.40
0603
MAX4484
SOT23
SC70
INA250
2mΩ
Key Take-away:
INA250 with integrated shunt outperforms accuracy of highest
precision amplifiers on market paired with 1% shunt resistors and
is the best cost/accuracy option.
INA250
INA250
TSSOP-16
Precision Resistor & Average Amplifier
Size
Cost
(1ku)
Amplifier
VOS
Gain
Error
Cost
(1ku)
10A Input
Error
Total
Cost
5mΩ
0.50%
805
$1.07
MAX9634W
250µV
0.70%
$0.71
1.00%
$1.78
3.3mΩ
0.50%
2512
$1.16
MAX9634W
250µV
0.70%
$0.71
1.15%
$1.87
2mΩ
0.10%
3637
$4.31
MAX9634W
250µV
0.70%
$0.71
1.44%
$5.02
5mΩ
0.50%
805
$1.07
INA210
35µV
1%
$0.75
1.12%
$1.82
3.3mΩ
0.50%
2512
$1.16
INA210
35µV
1%
$0.75
1.12%
$1.91
2mΩ
0.10%
3637
$4.31
INA210
35µV
1%
$0.75
1.02%
$5.06
0.10%
-
-
INA250A2
50mA
0.20%
-
0.55%
$1.40
MAX9634
0805
%
SOT23
INA210
0805
Resistor
Value
SC70
INA250
2mΩ
Key Take-away:
INA250 with integrated shunt outperforms on both cost and
accuracy compared to the low-cost amplifiers on market paired with
highest accuracy, low-Ω current sense resistors available.
INA250
INA250
TSSOP-16
Precision Amplifier & Precision Resistor
Resistor
Value
%
Size
Cost
(1ku)
Amplifier
VOS
Gain
Error
Cost
(1ku)
10A Input
Error
Total
Cost
2mΩ
0.10%
3637
$4.31
MAX44284
21µV
0.15%
$0.93
0.21%
$5.24
2mΩ
0.50%
1224
$0.86
MAX44284
21µV
0.15%
$0.93
0.53%
$1.79
2mΩ
1%
1206
$0.09
MAX44284
21µV
0.15%
$0.93
1.02%
$1.02
2mΩ
0.10%
3637
$4.31
INA210
35µV
1%
$0.75
1.02%
$5.06
MAX4484
2mΩ
0.50%
3637
$0.86
INA210
35µV
1%
$0.75
1.13%
$1.61
SOT23
2mΩ
1%
805
$0.09
INA210
35µV
1%
$0.75
1.43%
$0.84
-
INA250A2
50mA
0.20%
0.55%
$1.40
INA250
2mΩ
0.10%
-
-
0.1% 2mΩ 3637
(50ppm/°C)
or
INA210
SC70
Key Take-away:
High accuracy shunts paired with high accuracy monitors provide
equivalent performance as INA250 with integrated shunt but at
over 2.5X the cost and over 3X board space needed.
INA250
INA250
TSSOP-16
Competitive Spec Analysis
• Temperature coefficient defines deviation of tolerance of a resistor or
amplifier error over a defined temperature range.
• Integrated zero-drift shunt resistor with zero-drift amplifier offers lowest
drift solution available.
Amplifier
Resistor
Value
%
Shunt
Temperature
Coefficient
Offset
Temperature
Coefficient
Gain
Temperature
Coefficient
Total Error
@10A (25°C)
Total Error
@10A (85°C)
MAX44284
2mΩ
1
50ppm/°C
0.18µV/°C
20ppm/°C
1.03%
1.34%
INA210
2mΩ
1
50ppm/°C
0.5µV/°C
10ppm/°C
1.43%
1.71%
INA250A2
2mΩ
0.1
15ppm/°C
250µA/°C
30ppm/°C
0.55%
0.78%
0.1% 2mΩ 3637
(50ppm/°C)
MAX4484
SOT23
INA250
INA250
TSSOP-16
INA250 Who to Sell To…
Industrial
Key Customer
Care–abouts
Servers
Automotive
• Customers who must have very high-precision, low-drift measurements and conduct significant
calibration efforts on the system to achieve their goal
• The INA250 enables this level of system performance while minimizing or eliminating the
calibration effort
• Customers who have sacrificed their desired level of precision due to the cost of the shunt resistor
required to achieve the goal
• The INA250 offers a price point that will move the threshold of pain associated with discrete, highprecision, low-drift shunt resistors
Example End
Equipments
Key Market
Differentiators
• Test & Measurement Systems
• Power Supply
• Solar Inverter Battery
Management
• Power supply
• CPU Monitoring
• Load Monitoring and load
distribution
•
•
•
•
HEV/EV Battery Management
Body Control Module
Central Control Module
Valve Control
• Precision Integrated Shunt Resistor:
• Shunt Resistor: 2 mΩ
• 15 A Continuous from –40°C to 85°C
•
•
Shunt Resistor Tolerance: 0.1% (Max)
0°C to 125°C Temperature Coefficient: 10 ppm/°C
• High Accuracy:
• Gain Error (Shunt and Amplifier): 0.3% (Max) @ 25°C, 0.75% (Max) From –40°C to 125°C
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