Overview
The AD8123ACPZ from Analog Devices Inc. is a triple differential receiver and equalizer designed to compensate for transmission losses in Unshielded Twisted Pair (UTP) and coaxial cables up to 300 meters in length. This device is particularly suited for high-resolution RGB and HD YPbPr applications. It features adjustable line equalization, allowing for optimal performance across various cable lengths and types. The AD8123ACPZ operates with a dual supply voltage and has high impedance differential inputs, making it ideal for direct interface with cables.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range | ±4.5 | ±5.5 | ±5.5 | V |
| Positive Quiescent Supply Current | - | 132 | - | mA |
| Negative Quiescent Supply Current | - | 126 | - | mA |
| Supply Current Drift | - | 80 | - | µA/°C |
| Output Voltage Swing (150 Ω load) | -3.75 | - | +3.69 | V |
| Output Offset Voltage (referred to output) | 24 | - | 32 | mV |
| Output Offset Voltage Drift | - | 33 | - | µV/°C |
| Common Mode Rejection Ratio | -86 | - | - | dB |
| Package Type | - | 40-WFQFN Exposed Pad, CSP | - | - |
| Number of Pins | - | 40 | - | - |
Key Features
- Triple differential receiver with adjustable line equalization for UTP and coaxial cables up to 300 meters.
- High impedance differential inputs suitable for direct interface with cables.
- Dual supply voltage operation (±4.5V to ±5.5V).
- Three control pins for optimal cable compensation: VPEAK for high frequency peaking, VGAIN for broadband gain, and VPOLE for pole adjustment.
- Output offset adjust control (VOFFSET) for shifting the output DC level.
- Low noise performance optimized for short-to-medium cable lengths.
- Capable of driving a 150 Ω load; optional series resistor recommended for high impedance capacitive loads.
Applications
- High-resolution RGB video transmission.
- HD YPbPr video transmission.
- Long-haul video signal transmission over UTP and coaxial cables.
- Professional video equipment and broadcast systems.
- Industrial and medical imaging systems requiring high-quality video signal transmission.
Q & A
- What is the primary function of the AD8123ACPZ?
The AD8123ACPZ is a triple differential receiver and equalizer designed to compensate for transmission losses in UTP and coaxial cables.
- What is the maximum cable length the AD8123ACPZ can compensate for?
The AD8123ACPZ can compensate for transmission losses in cables up to 300 meters in length.
- What are the key control pins for cable compensation?
The key control pins are VPEAK for high frequency peaking, VGAIN for broadband gain, and VPOLE for pole adjustment.
- What is the typical operating voltage range for the AD8123ACPZ?
The typical operating voltage range is ±4.5V to ±5.5V.
- What is the output voltage swing for a 150 Ω load?
The output voltage swing for a 150 Ω load is -3.75V to +3.69V.
- How does the AD8123ACPZ handle high impedance capacitive loads?
For high impedance capacitive loads, it is recommended to use a small series resistor between the output and the load to buffer the capacitance.
- What are some common applications of the AD8123ACPZ?
Common applications include high-resolution RGB video transmission, HD YPbPr video transmission, and long-haul video signal transmission over UTP and coaxial cables.
- What is the package type of the AD8123ACPZ?
The package type is 40-WFQFN Exposed Pad, CSP.
- How many pins does the AD8123ACPZ have?
The AD8123ACPZ has 40 pins.
- What is the common mode rejection ratio (CMRR) of the AD8123ACPZ?
The CMRR is -86 dB.
