Texas Instruments INA134UA/2K5G4

The INA134UA/2K5G4, produced by Texas Instruments, is a high-performance audio differential line receiver. This integrated circuit is part of the INA134 series, which includes single and dual versions, with the INA134UA being the single-channel variant. It is designed for high-performance audio applications, featuring on-chip precision resistors and high-quality operational amplifiers. The device is known for its excellent AC specifications, including low distortion and high slew rate, ensuring good dynamic response. It operates over a wide supply voltage range from ±4V to ±18V and is specified for the extended industrial temperature range of –40°C to +85°C.

• High Performance Audio: Designed for high-performance audio applications with low distortion (0.0005% at 1kHz) and high slew rate (14V/µs).
• Precision Resistors: On-chip precision resistors are laser trimmed for accurate gain and optimum common-mode rejection.
• Wide Supply Voltage Range: Operates from ±4V to ±18V (8V to 36V total supply).
• Low Noise and High Bandwidth: Provides superior performance with very low noise and wide bandwidth.
• Independent Circuitry: The dual version (INA2134) features completely independent circuitry for lowest crosstalk and freedom from interaction.
• Temperature Stability: Excellent TCR tracking of the resistors maintains gain accuracy and common-mode rejection over temperature.

• Audio Differential Line Receiver: Ideal for receiving and amplifying differential audio signals.
• Summing Amplifier: Can be used as a summing amplifier for combining multiple signals.
• Unity-Gain Inverting Amplifier: Suitable for inverting signals without gain.
• Pseudo-Ground Generator: Can generate a pseudo-ground reference voltage.
• Instrumentation Building Block: Useful in various instrumentation applications requiring high precision and low noise.
• Current Shunt Monitor: Can be used to monitor current through a shunt resistor.
• Voltage-Controlled Current Source: Can be configured as a voltage-controlled current source.
• Ground Loop Eliminator: Helps in eliminating ground loops in audio and instrumentation systems.

1. What is the typical gain of the INA134UA?

   The typical gain of the INA134UA is 1 V/V (0dB).

2. What is the common-mode rejection ratio (CMRR) of the INA134UA?

   The CMRR is typically 90 dB.

3. What is the operating temperature range of the INA134UA?

   The operating temperature range is –40°C to +85°C.

4. What is the supply voltage range for the INA134UA?

   The supply voltage range is ±4V to ±18V (8V to 36V total supply).

5. What are the typical applications of the INA134UA?

   Typical applications include audio differential line receiver, summing amplifier, unity-gain inverting amplifier, pseudo-ground generator, instrumentation building block, current shunt monitor, voltage-controlled current source, and ground loop eliminator).

6. How is the output voltage swing of the INA134UA specified?

   The output voltage swing is specified as (V+)–2 to (V+)–1.8 and (V–)+2 to (V–)+1.6).

7. What is the quiescent current per amplifier for the INA134UA?

   The quiescent current per amplifier is typically ±2.9 mA).

8. Can the INA134UA be used in high-temperature environments?

   Yes, it is specified for operation over the extended industrial temperature range of –40°C to +85°C).

9. How does the INA134UA handle source impedance mismatches?

   A 10Ω mismatch in source impedance can degrade the common-mode rejection. An additional resistor in series with the opposite input can be used to preserve good common-mode rejection).

10. Is the INA134UA suitable for use in life support devices?

    No, Texas Instruments does not authorize or warrant the INA134UA for use in life support devices and/or systems).