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Product Detailed Parameters
- Description：IC INST AMP 1 CIRCUIT 8VSSOP
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Amplifier Type：Instrumentation
- Number of Circuits：1
- Output Type：Rail-to-Rail
- Slew Rate：0.4V/µs
- Gain Bandwidth Product：-
- Current - Input Bias：0.5 pA
- Voltage - Input Offset：2 mV
- Current - Supply：40µA
- Current - Output / Channel：16 mA
- Voltage - Supply Span (Min)：2.5 V
- Voltage - Supply Span (Max)：5.5 V
- Operating Temperature：-55°C ~ 125°C
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Supplier Device Package：8-VSSOP
- -3db Bandwidth：500 kHz
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Overview
The INA322EA/250G4 is a micropower, single-supply CMOS instrumentation amplifier manufactured by Texas Instruments. It features a rail-to-rail output swing and operates within a supply voltage range of +2.7V to +5.5V. The device provides a bandwidth of 500kHz at a gain of 5V/V with a slew rate of 0.4V/us. Key electrical parameters include an input bias current of 10pA, an input offset voltage of 10mV, and a quiescent current of 40µA per channel. It utilizes a VSSOP-8 package.
Feature Summary
- Features a shutdown mode that reduces quiescent current to less than 1µA for low-power applications
- Offers high gain accuracy with externally programmable gain setting via resistors
- Provides rail-to-rail output swing capability for wide dynamic range signal processing
Applications
- Industrial sensor amplifiers including bridge, RTD, thermistor, and position sensors
- Physiological amplifiers such as ECG, EEG, and EMG circuits
- A/D converter signal conditioning and differential line receivers with gain
Procurement Notes
Verify the specific ordering suffix matches the required tape and reel quantity. Confirm the RoHS compliance status and moisture sensitivity level ratings prior to assembly. Ensure the package designator corresponds to the intended PCB footprint. Cross-reference the manufacturer part number against the latest datasheet revisions to confirm active production status and availability.
Selection Notes
Select this component when low power consumption and high precision are required in a small form factor. The device is suitable for battery-operated systems due to its micropower characteristics and fast recovery from shutdown mode. Consider the external resistor requirements for gain setting and ensure the reference pin impedance is low enough to maintain common-mode rejection ratio specifications.
Part Context
This part belongs to the INA322 family of instrumentation amplifiers designed for cost-effective, high-performance signal conditioning. The 'EA' designation indicates the VSSOP-8 package variant, while '/250' specifies the standard 250-unit tape and reel packaging configuration. The 'G4' suffix denotes lead-free construction compliant with environmental standards.
Replacement Considerations
INA322EA/250
FAQ
How is the gain of the INA322EA/250G4 configured?
The gain is set using external resistors connected between pins 1, 5, and 6. The internal gain is 5V/V, and the total gain is calculated using the equation G = 5 + 5(R2/R1).
What is the function of the Shutdown pin?
Pulling the Shutdown pin below 0.8V on a 5V supply activates sleep mode, reducing quiescent current to less than 1µA. The device returns to normal operation within microseconds.
Can the INA322EA/250G4 drive capacitive loads directly?
Yes, the device has low output impedance at high frequencies, making it suitable for directly driving capacitive-input A/D converters without additional buffering.
