INA149AIDR
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Texas Instruments INA149AIDR

Manufacturer No:
INA149AIDR
Manufacturer:
Texas Instruments
Package:
Tape & Reel (TR)
Description:
IC OPAMP DIFF 1 CIRCUIT 8SOIC
Delivery:
Payment:
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Product Introduction

Overview

The INA149AIDR is a high common-mode voltage difference amplifier produced by Texas Instruments. This precision unity-gain difference amplifier is designed to accurately measure small differential voltages in the presence of high common-mode signals up to ±275 V. It is a single, monolithic device that includes a precision op amp and an integrated thin-film resistor network. The INA149AIDR is particularly useful in applications where high common-mode rejection is required, such as in industrial, automotive, and medical equipment.

Key Specifications

ParameterMinTypMaxUnit
Common-Mode Voltage Range±275V
Common-Mode Rejection Ratio (CMRR)90dB (–40°C to +125°C)
Maximum Offset Voltage3501100μV
Maximum Offset Voltage Drift15μV/°C
Maximum Gain Error0.02%
Differential Input Impedance800
Common-Mode Input Impedance200
Supply Voltage Range45V

Key Features

  • High Common-Mode Voltage Range: The INA149AIDR can handle common-mode signals up to ±275 V, making it suitable for applications with high voltage differences.
  • High Common-Mode Rejection Ratio (CMRR): With a minimum CMRR of 90 dB from –40°C to +125°C, this amplifier ensures high accuracy in measuring differential signals.
  • Precision Op Amp and Resistor Network: The device includes a precision op amp and an integrated thin-film resistor network, ensuring high precision and stability.
  • Low Offset Voltage and Drift: The amplifier has a low maximum offset voltage of 1100 μV and a drift of 15 μV/°C, which is crucial for maintaining accuracy over temperature variations.
  • Compact Package: Available in an 8-pin SOIC package, making it suitable for a variety of applications where space is limited.

Applications

The INA149AIDR is versatile and can be used in various applications, including:

  • Industrial Automation: For measuring differential signals in the presence of high common-mode voltages in industrial control systems.
  • Automotive Systems: In automotive sensors and control systems where high voltage differences are common.
  • Medical Equipment: For precise measurement of differential signals in medical devices, such as ECG and EEG systems.
  • Test and Measurement Equipment: In oscilloscopes, multimeters, and other test equipment requiring high common-mode rejection.

Q & A

  1. What is the common-mode voltage range of the INA149AIDR?
    The INA149AIDR can handle common-mode signals up to ±275 V.
  2. What is the minimum CMRR of the INA149AIDR?
    The minimum CMRR is 90 dB from –40°C to +125°C.
  3. What is the maximum offset voltage of the INA149AIDR?
    The maximum offset voltage is 1100 μV.
  4. What is the maximum gain error of the INA149AIDR?
    The maximum gain error is 0.02%.
  5. What is the typical differential input impedance of the INA149AIDR?
    The typical differential input impedance is 800 kΩ.
  6. What is the typical common-mode input impedance of the INA149AIDR?
    The typical common-mode input impedance is 200 kΩ.
  7. What is the supply voltage range for the INA149AIDR?
    The supply voltage range is from 4 V to 5 V.
  8. In what package is the INA149AIDR available?
    The INA149AIDR is available in an 8-pin SOIC package.
  9. What are some common applications of the INA149AIDR?
    Common applications include industrial automation, automotive systems, medical equipment, and test and measurement equipment.
  10. How does the INA149AIDR handle high common-mode signals?
    The INA149AIDR uses a high precision resistor divider to bring both the positive and negative inputs within the input range of the internal operational amplifier, thus handling high common-mode signals effectively.

Product Attributes

Amplifier Type:Differential
Number of Circuits:1
Output Type:- 
Slew Rate:5V/µs
Gain Bandwidth Product:- 
-3db Bandwidth:500 kHz
Current - Input Bias:- 
Voltage - Input Offset:350 µV
Current - Supply:810µA
Current - Output / Channel:25 mA
Voltage - Supply Span (Min):4 V
Voltage - Supply Span (Max):36 V
Operating Temperature:-40°C ~ 125°C
Mounting Type:Surface Mount
Package / Case:8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:8-SOIC
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Similar Products

Part Number INA149AIDR INA149AID
Manufacturer Texas Instruments Texas Instruments
Product Status Active Active
Amplifier Type Differential Differential
Number of Circuits 1 1
Output Type - -
Slew Rate 5V/µs 5V/µs
Gain Bandwidth Product - -
-3db Bandwidth 500 kHz 500 kHz
Current - Input Bias - -
Voltage - Input Offset 350 µV 350 µV
Current - Supply 810µA 810µA
Current - Output / Channel 25 mA 25 mA
Voltage - Supply Span (Min) 4 V 4 V
Voltage - Supply Span (Max) 36 V 36 V
Operating Temperature -40°C ~ 125°C -40°C ~ 125°C
Mounting Type Surface Mount Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width) 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package 8-SOIC 8-SOIC

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