Overview
The AD8129ARM-REEL7, produced by Analog Devices Inc., is a low-cost, high-performance differential receiver amplifier. It is part of the AD8129/AD8130 family, designed for the transmission of high-speed signals over twisted-pair cables, particularly in conjunction with the AD8131 or AD8132 drivers. This amplifier is suitable for both analog and digital video signals, as well as high-speed data transmission. The AD8129 is a low-noise, high-gain version, ideal for applications involving long cables where significant signal attenuation occurs. In contrast, the AD8130 is stable at a gain of 1, making it suitable for applications requiring lower gains.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Bandwidth (−3 dB) | VOUT ≤ 0.3 V p-p | 175 | 200 | 250 | MHz |
| Bandwidth (−3 dB) | VOUT = 2 V p-p | 170 | 195 | 220 | MHz |
| Slew Rate | VOUT = 2 V p-p, 25% to 75% | 935 | 1070 | 1100 | V/μs |
| Settling Time | VOUT = 2 V p-p, 0.1% | 20 | ns | ||
| Rise and Fall Times | VOUT ≤ 1 V p-p, 10% to 90% | 1.7 | ns | ||
| Input Noise | f ≥ 100 kHz | 4.5 | nV/√Hz | ||
| Common-Mode Rejection Ratio (CMRR) | DC to 100 kHz | 86 | dB | ||
| Common-Mode Voltage Range | ±10.5 | V | |||
| Power Supply Range | +4.5 V to ±12.6 V | V | |||
| Operating Temperature Range | −40°C to +85°C | °C |
Key Features
- High CMRR: Excellent common-mode rejection ratio (up to 86 dB at DC to 100 kHz and 70 dB at 10 MHz), enabling the use of low-cost, unshielded twisted-pair cables without fear of external noise or crosstalk.
- Low Noise: The AD8129 has a low noise level of 4.5 nV/√Hz, while the AD8130 has a noise level of 12.5 nV/√Hz.
- User-Adjustable Gain: Gain can be adjusted using the ratio of two resistor values, helping to compensate for transmission line losses.
- 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, allowing for wide common-mode and differential-mode voltage ranges.
- Power-Down Feature: Includes a power-down mode to reduce power consumption when not in use.
Applications
- High Speed Differential Line Receivers: Ideal for receiving high-speed signals over twisted-pair cables.
- Differential-to-Single-Ended Converters: Effective for converting differential signals to single-ended signals.
- High Speed Instrumentation Amplifiers: Can be used as high-speed instrumentation amps due to their high CMRR at high frequencies.
- Level Shifting: Useful for level shifting applications where signal integrity needs to be maintained.
- Analog and Digital Video Signals: Suitable for both analog and digital video signal transmission.
- High Speed Data Transmission: Applicable for high-speed data transmission over twisted-pair cables.
Q & A
- What is the primary function of the AD8129ARM-REEL7?
The AD8129ARM-REEL7 is a differential receiver amplifier designed for the transmission of high-speed signals over twisted-pair cables.
- What are the key differences between the AD8129 and AD8130?
The AD8129 is a low-noise, high-gain version (gain of 10 or greater), while the AD8130 is stable at a gain of 1 and suitable for applications requiring lower gains.
- What is the common-mode rejection ratio (CMRR) of the AD8129/AD8130?
The CMRR is up to 86 dB at DC to 100 kHz and 70 dB at 10 MHz.
- What is the input noise level of the AD8129 and AD8130?
The AD8129 has a noise level of 4.5 nV/√Hz, while the AD8130 has a noise level of 12.5 nV/√Hz.
- How is the gain adjusted in the AD8129/AD8130?
The gain is adjusted using the ratio of two resistor values.
- What is the power supply range for the AD8129/AD8130?
The power supply range is from a single +5 V to ±12 V.
- What are some common applications of the AD8129/AD8130?
Common applications include high-speed differential line receivers, differential-to-single-ended converters, high-speed instrumentation amps, level shifting, and high-speed data transmission.
- Can the AD8129/AD8130 be used for both analog and digital video signals?
Yes, the AD8129/AD8130 can be used for both analog and digital video signals.
- What is the operating temperature range of the AD8129/AD8130?
The operating temperature range is −40°C to +85°C.
- Does the AD8129/AD8130 have a power-down feature?
Yes, the AD8129/AD8130 includes a power-down mode to reduce power consumption when not in use.
