Overview
The AD8132ARMZ from Analog Devices Inc. is a low-cost, high-speed differential amplifier designed for a variety of high-performance applications. It features a unique internal feedback mechanism that ensures output gain and phase matching, suppressing harmonics and reducing radiated EMI. Manufactured using the next-generation XFCB bipolar process, this amplifier offers a −3 dB bandwidth of 350 MHz and delivers a differential signal with −99 dBc SFDR at 5 MHz. The AD8132 is particularly useful for driving differential input ADCs, transmitting high-speed signals over long lines, and in applications requiring differential signal processing and level shifting.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Power Supply Range | 2.7 | ±5.5 | V | |
| Quiescent Current | 10.7 | mA @ 5 V | ||
| −3 dB Bandwidth | 350 | MHz | ||
| Differential Gain Error (NTSC, G = +2, RL, dm = 150 Ω) | 0.01 | % | ||
| Differential Phase Error (NTSC, G = +2, RL, dm = 150 Ω) | 0.10 | Degrees | ||
| Input Offset Voltage (RTI) | ±1.0 | ±3.5 | mV | |
| Input Bias Current (TA = 25°C) | 3 | 7 | μA | |
| Input Resistance (Differential) | 12 | MΩ | ||
| Input Capacitance | 1 | pF | ||
| Output Voltage Swing (Maximum, single-ended output) | 1.0 | 4.0 | V | |
| Output Current | 50 | mA | ||
| Operating Temperature Range | −40 | +125 | °C |
Key Features
- Unique Internal Feedback Feature: Provides output gain and phase matching balanced to −68 dB at 10 MHz, suppressing harmonics and reducing radiated EMI.
- High-Speed Performance: −3 dB bandwidth of 350 MHz and −99 dBc SFDR at 5 MHz.
- Low Power Consumption: Quiescent current of 10.7 mA at 5 V.
- Adjustable Common-Mode Level: The VOCM pin allows for adjustable common-mode level of the differential output, facilitating level shifting for single-supply ADCs.
- Fast Overload Recovery: Preserves sampling accuracy by quickly recovering from overloads.
- Differential Signal Processing: Reduces the effects of ground noise in ground-referenced systems and simplifies the conversion between differential and single-ended components.
- AEC-Q100 Qualified (AD8132W): Suitable for automotive applications with operation up to 125°C.
Applications
- Differential ADC Drivers: Ideal for driving differential input ADCs, preserving low frequency and DC information.
- Differential Gain and Filtering: Used in differential signal processing and filtering throughout the signal chain.
- Video Line Drivers: Suitable for driving analog or digital video signals over twisted pair or coaxial cables.
- Single-Ended Input to Differential Output Drivers: Converts single-ended inputs to differential outputs, useful in various signal transmission scenarios.
- Automotive Driver Assistance and Infotainment: AEC-Q100 qualified version (AD8132W) is suitable for automotive applications.
Q & A
- What is the primary function of the AD8132ARMZ?
The AD8132ARMZ is a low-cost, high-speed differential amplifier designed for converting single-ended inputs to differential outputs and driving differential input ADCs or transmitting high-speed signals over long lines.
- What is the bandwidth of the AD8132ARMZ?
The AD8132ARMZ has a −3 dB bandwidth of 350 MHz.
- What is the power supply range for the AD8132ARMZ?
The power supply range is from 2.7 V to ±5.5 V.
- How much quiescent current does the AD8132ARMZ consume at 5 V?
The quiescent current is 10.7 mA at 5 V.
- What is the differential gain error of the AD8132ARMZ?
The differential gain error is 0.01% for NTSC, G = +2, RL, dm = 150 Ω.
- Is the AD8132ARMZ suitable for automotive applications?
Yes, the AD8132W version is AEC-Q100 qualified and suitable for automotive applications up to 125°C.
- What package options are available for the AD8132ARMZ?
The AD8132ARMZ is available in 8-lead MSOP and 8-lead SOIC packages.
- How does the AD8132ARMZ handle common-mode level adjustment?
The common-mode level of the differential output can be adjusted by applying a voltage on the VOCM pin.
- What are some common applications of the AD8132ARMZ?
Common applications include differential ADC drivers, video line drivers, single-ended input to differential output drivers, and automotive driver assistance and infotainment systems.
- Does the AD8132ARMZ support fast overload recovery?
Yes, the AD8132ARMZ features fast overload recovery to preserve sampling accuracy.
