Overview
The TDA8579T/N1,112, manufactured by NXP USA Inc., is a dual common-mode rejection differential line receiver. This integrated circuit is primarily designed for audio applications, particularly in car radio systems, where it is essential to eliminate ground noise and ensure high-quality signal transmission over long connections.
The device is housed in an 8-pin Small Outline (SO) package and features two identical differential amplifiers with a voltage gain of 0 dB. It is notable for its excellent common-mode rejection, low distortion, and high supply voltage ripple rejection, making it suitable for environments with significant electrical noise.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC (Supply Voltage) | 5.0 | 8.5 | 18 | V | |
| ICC (Supply Current) | VCC = 8.5 V | 14 | mA | ||
| GV (Voltage Gain) | -0.5 | 0 | +0.5 | dB | |
| SVRR (Supply Voltage Ripple Rejection) | 55 | 60 | dB | ||
| Vno (Noise Output Voltage) | 3.7 | 5.0 | μV | ||
| |Zi| (Input Impedance) | 100 | 240 | kΩ | ||
| CMRR (Common-Mode Rejection Ratio) | R_s = 0 Ω | 80 | dB | ||
| Operating Temperature | -40 | 85 | °C | ||
| Package / Case | 8-SOIC (0.154', 3.90mm Width) | ||||
| Mounting Type | Surface Mount |
Key Features
- Excellent Common-Mode Rejection: Up to high frequencies, ensuring minimal ground noise interference.
- Low Distortion: Maintains signal integrity with low distortion levels.
- High Supply Voltage Ripple Rejection: Reduces the impact of supply voltage variations on the signal.
- Low Noise: Minimizes output noise voltage for clearer signal transmission.
- Few External Components Required: Simplifies circuit design and reduces component count.
- Electrostatic Discharge Protection: All pins are protected against high electrostatic discharge conditions.
- AC and DC Short-Circuit Safe: Safe to ground and VCC, enhancing reliability in harsh environments.
- Fast DC Settling: Quick-charge circuit ensures rapid settling of the DC input voltage.
Applications
The TDA8579T/N1,112 is primarily used in audio applications, particularly in car radio systems, where long connections between signal sources and amplifiers are common. It is also suitable for any application requiring high common-mode rejection and low distortion, such as:
- Automotive audio systems
- Professional audio equipment
- Industrial control systems requiring noise-free signal transmission
- Any environment with significant electrical noise and ground interference
Q & A
- What is the primary function of the TDA8579T/N1,112?
The TDA8579T/N1,112 is a dual common-mode rejection differential line receiver, designed to receive line input signals in audio applications while eliminating ground noise.
- What is the package type of the TDA8579T/N1,112?
The device is housed in an 8-pin Small Outline (SO) package.
- What is the operating temperature range of the TDA8579T/N1,112?
The operating temperature range is from -40°C to 85°C.
- What is the typical supply current of the TDA8579T/N1,112?
The typical supply current is 14 mA at VCC = 8.5 V.
- Does the TDA8579T/N1,112 have electrostatic discharge protection?
- What is the common-mode rejection ratio (CMRR) of the TDA8579T/N1,112?
The CMRR is up to 80 dB with Rs = 0 Ω.
- Is the TDA8579T/N1,112 safe against short-circuits?
- What is the typical noise output voltage of the TDA8579T/N1,112?
The typical noise output voltage is 3.7 μV.
- What is the input impedance of the TDA8579T/N1,112?
The input impedance is between 100 kΩ and 240 kΩ.
- What are some common applications of the TDA8579T/N1,112?
