Overview
The INA134UA/2K5, produced by Texas Instruments, is a high-performance audio differential line receiver. This component is part of the INA134 and INA2134 family, designed for demanding audio applications. It features high-performance op amps with on-chip precision resistors, ensuring excellent AC specifications such as low distortion and high slew rates. The device is fully specified for high-performance audio applications and is available in both single (INA134) and dual (INA2134) versions, with the INA134UA/2K5 being a specific package variant of the INA134.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Gain | Initial | 1 | 1 | 1 | V/V |
| Gain Error | VO = –16V to 16V | ±0.02% | ±0.1% | % | |
| Gain vs Temperature | ±1 ppm/°C | ±10 ppm/°C | ppm/°C | ||
| Common-Mode Rejection | VCM = ±31V, RS = 0Ω | 74 dB | 90 dB | dB | |
| Differential Input Impedance | 50 kΩ | kΩ | |||
| Common-Mode Input Impedance | 50 kΩ | kΩ | |||
| Output Voltage Swing | V+ to V– | (V+) – 2 to (V+) – 1.8 | V | ||
| Output Current Limit | Continuous to Common | ±60 mA | mA | ||
| Power Supply Voltage | ±4 V to ±18 V | V | |||
| Quiescent Current (per Amplifier) | IO = 0 | ±2.4 mA | ±2.9 mA | mA | |
| Operating Temperature Range | –40°C to +85°C | °C | |||
| Thermal Resistance, θJA | 8-Pin DIP | 100 °C/W | °C/W | ||
| Thermal Resistance, θJA | SO-8 Surface-Mount | 150 °C/W | °C/W |
Key Features
- High Performance Op Amps: The INA134UA/2K5 features high-performance op amps with on-chip precision resistors, ensuring accurate gain and optimum common-mode rejection.
- Low Distortion and High Slew Rate: It offers very low distortion (0.0005% at 1kHz) and a high slew rate (14V/µs), ensuring good dynamic response.
- Wide Output Voltage Swing: The device has a wide output voltage swing and high output drive capability, making it suitable for a variety of demanding applications.
- Independent Circuitry: The dual version (INA2134) features completely independent circuitry, ensuring lowest crosstalk and freedom from interaction even when overdriven or overloaded.
- Laser-Trimmed Resistors: The on-chip resistors are laser trimmed for accurate gain and optimum common-mode rejection, with excellent TCR tracking to maintain performance over temperature.
- Broad Operating Temperature Range: The device operates over an extended industrial temperature range of –40°C to +85°C.
Applications
- Audio Differential Line Receiver: Ideal for high-quality audio applications requiring low distortion and high slew rates.
- Summing Amplifier: Can be used as a summing amplifier due to its high precision and low noise characteristics.
- Unity-Gain Inverting Amplifier: Suitable for applications requiring unity-gain inverting configurations.
- Pseudo-Ground Generator: Can be used to generate pseudo-ground signals in various circuits.
- Instrumentation Building Block: Useful in instrumentation applications requiring high accuracy and stability.
- Current Shunt Monitor: Can be used to monitor current in shunt configurations.
- Voltage-Controlled Current Source: Can be configured as a precision voltage-controlled current source.
- Ground Loop Eliminator: Helps in eliminating ground loops in audio and instrumentation circuits.
Q & A
- What is the typical gain of the INA134UA/2K5?
The typical gain of the INA134UA/2K5 is 1 V/V (0dB).
- What is the common-mode rejection ratio (CMRR) of the INA134UA/2K5?
The CMRR is typically 90 dB.
- What is the slew rate of the INA134UA/2K5?
The slew rate is 14 V/µs.
- What are the operating temperature ranges for the INA134UA/2K5?
The device operates over an extended industrial temperature range of –40°C to +85°C.
- What are the package options available for the INA134UA/2K5?
The INA134UA/2K5 is available in 8-pin DIP and SO-8 surface-mount packages.
- How does the INA134UA/2K5 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.
- What is the maximum output voltage swing of the INA134UA/2K5?
The output voltage swing is approximately (V+) – 2 to (V+) – 1.8 and (V–) + 2 to (V–) + 1.6.
- Can the INA134UA/2K5 be used in high-impedance power supply applications?
Yes, but decoupling capacitors are strongly recommended to be placed close to the device pins to mitigate noisy or high impedance power supplies.
- How does the INA134UA/2K5 perform in terms of distortion?
The device has very low distortion, with THD+Noise below 0.002% throughout the audio frequency range.
- Can the offset voltage of the INA134UA/2K5 be adjusted?
Yes, the output offset voltage can be adjusted using an optional circuit as shown in Figure 2 of the datasheet.
