Overview
The AD8129AR, produced by Analog Devices Inc., is a low-cost, high-performance differential receiver amplifier. It is designed to receive high-speed signals transmitted over twisted-pair cables, often in conjunction with the AD8131 or AD8132 drivers. This amplifier is particularly useful for applications requiring the conversion of differential signals to single-ended signals, making it suitable for high-speed instrumentation, analog or digital video signals, and high-speed data transmission.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating Temperature Range | -40 | 85 | °C | ||
| Total Supply Voltage | ±2.25 | ±12.6 | V | ||
| Quiescent Supply Current | TMIN to TMAX | 10.8 | 11.6 | mA | |
| Input Offset Voltage | 0.2 | 0.8 | 1.8 | mV | |
| Input Bias Current (+IN, -IN) | ±0.5 | μA | |||
| -3 dB Bandwidth | VOUT ≤ 0.3 V p-p | 175 | 200 | 250 | MHz |
| Slew Rate | VOUT = 2 V p-p, 25% to 75% | 935 | 1070 | V/μs | |
| Settling Time | VOUT = 2 V p-p, 0.1% | 20 | ns | ||
| Noise | 4.5 | nV/√Hz | |||
| Common-Mode Rejection Ratio (CMRR) | @ 10 MHz | 70 | dB |
Key Features
- High CMRR: Excellent common-mode rejection ratio of up to 70 dB at 10 MHz, allowing the use of low-cost, unshielded twisted-pair cables without fear of external noise or crosstalk.
- Low Noise: The AD8129 has a low noise figure of 4.5 nV/√Hz, making it suitable for applications requiring high signal integrity.
- User-Adjustable Gain: Gain can be adjusted using the ratio of two resistor values, helping to compensate for losses in the transmission line.
- High Input Impedance: Very high input impedance on both inputs, regardless of the gain setting.
- Wide Power Supply Range: Operates from a single 5 V supply to ±12 V, providing flexibility in various applications.
- Power-Down Feature: Allows for power-down mode to reduce power consumption when not in use.
- High Speed: -3 dB bandwidth of up to 250 MHz and a slew rate of up to 1070 V/μs.
Applications
- High Speed Differential Line Receivers: Ideal for receiving high-speed signals over twisted-pair cables.
- Differential-to-Single-Ended Converters: Effective in converting differential signals to single-ended signals.
- High Speed Instrumentation Amplifiers: Suitable for high-speed instrumentation applications due to their high CMRR and low noise.
- Level Shifting: Can be used for level shifting in various high-speed signal processing applications.
- Analog or Digital Video Signals: Applicable for both analog and digital video signal transmission.
- High Speed Data Transmission: Used in high-speed data transmission systems.
Q & A
- What is the operating temperature range of the AD8129AR?
The operating temperature range is -40°C to +85°C.
- What is the typical noise figure of the AD8129AR?
The typical noise figure is 4.5 nV/√Hz.
- What is the common-mode rejection ratio (CMRR) of the AD8129AR at 10 MHz?
The CMRR is 70 dB at 10 MHz.
- How is the gain of the AD8129AR adjusted?
The gain is adjusted using the ratio of two resistor values.
- What is the -3 dB bandwidth of the AD8129AR?
The -3 dB bandwidth is up to 250 MHz.
- Does the AD8129AR have a power-down feature?
Yes, it has a power-down feature to reduce power consumption when not in use).
- What are the typical applications of the AD8129AR?
Typical applications include high-speed differential line receivers, differential-to-single-ended converters, high-speed instrumentation amplifiers, level shifting, and high-speed data transmission).
- What is the input impedance of the AD8129AR?
The AD8129AR has very high input impedance on both inputs, regardless of the gain setting).
- What is the slew rate of the AD8129AR?
The slew rate is up to 1070 V/μs).
- What is the power supply range of the AD8129AR?
The power supply range is from a single 5 V supply to ±12 V).
