Overview
The AD8129ARM, produced by Analog Devices Inc., is a low-cost, high-speed differential receiver amplifier. It is designed to receive high-speed signals transmitted over twisted-pair cables, typically 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 AD8129ARM is characterized by its high common-mode rejection ratio (CMRR) at high frequencies, making it effective for use as a high-speed instrumentation amplifier or for converting differential signals to single-ended signals.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating Temperature Range | –40 | +85 | °C | ||
| Power Supply Range | +4.5 V to ±12.6 V | V | |||
| Quiescent Supply Current | TMIN to TMAX | 9.9 | 10.6 | mA | |
| Input Noise | 4.5 | nV/√Hz | |||
| Common-Mode Rejection Ratio (CMRR) | DC to 100 kHz | 94 | dB | ||
| CMRR | @ 2 MHz | 80 | dB | ||
| CMRR | @ 10 MHz | 70 | 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 |
Key Features
- Differential-to-single-ended amplifier with high CMRR at high frequencies.
- Low noise: 4.5 nV/√Hz.
- High gain version (G ≥ 10) suitable for long cable applications.
- User-adjustable gain set by the ratio of two resistor values.
- High input impedance: 1 MΩ differential input.
- Wide power supply range: +4.5 V to ±12.6 V.
- Power-down feature.
- Low distortion: –74 dBc worst harmonic at 5 MHz.
- High bandwidth: up to 200 MHz.
Applications
- High-speed differential line receivers.
- Differential-to-single-ended converters.
- High-speed instrumentation amplifiers.
- Level shifting.
- Analog and digital video signal transmission.
- High-speed data transmission.
Q & A
- What is the primary function of the AD8129ARM?
The AD8129ARM is a differential receiver amplifier designed to receive high-speed signals transmitted over twisted-pair cables.
- What are the typical applications of the AD8129ARM?
It is used in high-speed differential line receivers, differential-to-single-ended converters, high-speed instrumentation amplifiers, level shifting, and for transmitting analog and digital video signals as well as high-speed data.
- What is the operating temperature range of the AD8129ARM?
The operating temperature range is –40°C to +85°C.
- What is the power supply range for the AD8129ARM?
The power supply range is +4.5 V to ±12.6 V.
- How is the gain of the AD8129ARM adjusted?
The gain is user-adjustable and set by the ratio of two resistor values.
- What is the input noise of the AD8129ARM?
The input noise is 4.5 nV/√Hz.
- What is the common-mode rejection ratio (CMRR) of the AD8129ARM at high frequencies?
The CMRR is 70 dB at 10 MHz.
- What is the bandwidth of the AD8129ARM?
The bandwidth is up to 200 MHz for VOUT ≤ 0.3 V p-p.
- Does the AD8129ARM have a power-down feature?
Yes, it has a power-down feature.
- What is the slew rate of the AD8129ARM?
The slew rate is 935 V/μs for VOUT = 2 V p-p, 25% to 75%.
