Product Summary

The INA121U is an FET-input, low power instrumentation amplifier offering excellent accuracy. The versatile three-op amp design and very small size of the device make it ideal for a variety of general purpose applications. Low bias current (±4pA) of the device allows use with high impedance sources. The applications of the INA121UA include: (1)low-level transducer amplifiers bridge, rtd, thermocouple; (2)physiological amplifiers ecg, eeg, emg, respiratory; (3)high impedance transducers; (4)capacitive sensors; (5)multi-channel data acquisition; (6)portable, battery operated systems; (7)general purpose instrumentation.

Parametrics

INA121U absolute maximum ratings: (1)Supply Voltage: ±18V; (2)Analog Input Voltage Range: ±40V; (3)Output Short-Circuit (to ground): Continuous; (4)Operating Temperature: –55℃ to +125℃; (5)Storage Temperature: –55℃ to +125℃; (6)Junction Temperature: +150℃; (7)Lead Temperature (soldering, 10s): +300℃.

Features

INA121U features: (1)Low bias current: ±4pA; (2)Low quiescent current: ±450mA; (3)Low input offset voltage: ±200mV; (4)Low input offset drift: ±2mV/℃; (5)Low input noise: 20nV/Hz at f = 1kHz (G =100); (6)High CMR: 106dB; (7)Wide supply range: ±2.25V to ±18V; (8)Low nonlinearity error: 0.001% max; (9)Input protection to ±40V; (10)8-Pin dip and SO-8 surface mount.

Diagrams

INA121U block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
INA121U
INA121U

Texas Instruments

Instrumentation Amplifiers FET-Input Low Power Instrumentation Amp

Data Sheet

0-1: $5.47
1-10: $4.91
10-25: $4.37
25-50: $4.12
INA121U/2K5
INA121U/2K5

Texas Instruments

Instrumentation Amplifiers FET-Input Low Power Instrumentation Amp

Data Sheet

0-2005: $2.39
2005-2500: $2.39
INA121UA
INA121UA

Texas Instruments

Instrumentation Amplifiers FET-Input Low Power Instrumentation Amp

Data Sheet

0-1: $4.05
1-10: $3.64
10-25: $3.24
25-50: $3.05
INA121U/2K5G4
INA121U/2K5G4

Texas Instruments

Instrumentation Amplifiers FET-Input Low Power Instrumentation Amp

Data Sheet

0-2005: $2.39
2005-2500: $2.39
INA121UA/2K5
INA121UA/2K5

Texas Instruments

Instrumentation Amplifiers FET-Input Low Power Instrumentation Amp

Data Sheet

0-2005: $1.69
2005-2500: $1.69
INA121UA/2K5E4
INA121UA/2K5E4

Texas Instruments

Instrumentation Amplifiers FET-Input Low Power Instrumentation Amp

Data Sheet

0-2005: $1.69
2005-2500: $1.69
INA121UAE4
INA121UAE4

Texas Instruments

Instrumentation Amplifiers FET-Input Low Power Instrumentation Amp

Data Sheet

0-1: $4.05
1-10: $3.64
10-25: $3.24
25-50: $3.05
INA121UG4
INA121UG4

Texas Instruments

Instrumentation Amplifiers FET-Input Low Power Instrumentation Amp

Data Sheet

0-1: $5.47
1-10: $4.91
10-25: $4.37
25-50: $4.12