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Product Detailed Parameters
- Description：IC INST AMP 1 CIRCUIT 8SOIC
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Amplifier Type：Instrumentation
- Number of Circuits：1
- Output Type：-
- Slew Rate：0.7V/µs
- Gain Bandwidth Product：-
- Current - Input Bias：4 pA
- Voltage - Input Offset：300 µV
- Current - Supply：450µA
- Current - Output / Channel：14 mA
- Voltage - Supply Span (Min)：4.5 V
- Voltage - Supply Span (Max)：36 V
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- -3db Bandwidth：5 kHz
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Overview
The INA121UA is a low-power instrumentation amplifier manufactured by Texas Instruments. It features FET inputs and is housed in an 8-pin SOIC package. The device operates within a supply voltage range of 4.5V to 36V, or ±2.25V to ±18V. Key electrical specifications include a maximum offset voltage of 2000µV, a bandwidth of 0.6MHz, a gain bandwidth product (GBP) that is not explicitly quantified in the provided text but is associated with the bandwidth, a slew rate of 0.7 V/µs, and a per-channel power consumption of 450µA.
Feature Summary
- FET-input architecture for low bias current
- Low power consumption design
- Single-supply operation capability
Applications
- Battery-powered instrumentation systems
- Precision signal conditioning
- Industrial process control
Procurement Notes
Verify the specific suffix (e.g., -2K5) against the datasheet to confirm reel quantity and tape-and-reel packaging requirements. Ensure the ordering part number matches the exact pinout and performance grade required for the application. Cross-reference the manufacturer's latest documentation to confirm RoHS compliance and lifecycle status before finalizing procurement.
Selection Notes
Select this component when low quiescent current is critical for battery life. The FET input stage minimizes loading on high-impedance sources. Verify that the 0.6MHz bandwidth meets the signal frequency requirements. Confirm that the 8-pin SOIC package fits the PCB layout constraints. Check if the 2000µV max offset voltage satisfies the system accuracy needs.
Part Context
The INA121 belongs to the family of low-power instrumentation amplifiers from Texas Instruments. It is designed for applications requiring high common-mode rejection ratio (CMRR) with minimal power draw. The UA suffix typically denotes the plastic small-outline package variant. This series is commonly used in portable medical devices and industrial sensors where power efficiency is paramount.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided source material.
