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INA111AP

TIINA111AP

Texas Instruments
Instrumentation Amplifier 1 Circuit 8-PDIP
Active219 in stock
Datasheet Digi-Key Compare Prices

Overview

The INA111AP is a high-speed, FET-input instrumentation amplifier designed for applications requiring high precision and fast settling times. It utilizes a three-op-amp topology to provide excellent common-mode rejection and a wide bandwidth of 2 MHz, making it suitable for capturing fast signals in noisy environments.

Why Choose This Part

The FET input stage provides an extremely low input bias current of 2 pA, which minimizes errors when interfacing with high-impedance sources. Its high slew rate of 17V/us and 2 MHz bandwidth offer superior dynamic performance compared to standard bipolar instrumentation amplifiers.

Applications

Medical Instrumentation
Ideal for ECG and EEG monitoring due to the ultra-low 2 pA input bias current and high input impedance.
Data Acquisition Systems
Used as a front-end signal conditioner to drive high-speed ADCs with its 17V/us slew rate.
Industrial Process Control
Effective for amplifying low-level signals from pressure transducers and strain gauges in electrically noisy industrial settings.
Video Signal Buffering
The wide bandwidth allows for processing and amplifying high-frequency signals without significant phase distortion.

Key Specifications

Slew Rate 17V/us
Mounting Type Through Hole
-3db Bandwidth 2 MHz
Amplifier Type Instrumentation
Package / Case 8-DIP (0.300", 7.62mm)
Current - Supply 3.3mA
Number of Circuits 1
Current - Input Bias 2 pA
Operating Temperature -40degC ~ 85degC
Voltage - Input Offset 200 uV
Supplier Device Package 8-PDIP
Current - Output / Channel 30 mA
Voltage - Supply Span (Max) 36 V
Voltage - Supply Span (Min) 12 V

Getting Started

When designing with the INA111AP, ensure the gain is set by a single external resistor between pins 1 and 8 to achieve the desired amplification. Given its 17V/us slew rate, place 0.1uF ceramic bypass capacitors as close as possible to the supply pins (up to +/-18V) to maintain stability and minimize noise in high-speed circuits.

INA111 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Voltage - Input Offset Stock
INA111AP (this part) DIP-8 200 uV 219
INA111AU SOIC-16 200 uV 935
INA111BP DIP-8 100 uV 36

Also Consider

INA128PA TITexas Instruments - A precision alternative for lower-speed applications offering lower power consumption and better offset voltage stability.
AD8221ARZ Analog Devices - Offers industry-leading common-mode rejection ratio (CMRR) across a wide frequency range in a surface-mount package.

Categories

Analog ICs > Instrumentation Amplifiers Analog ICs Industrial & Automation > Industrial Sensors & Instrumentation