Overview
The AD8132ARZ, produced by Analog Devices Inc., is a low-cost, high-speed differential or single-ended input to differential output amplifier. It is designed with a resistor set gain and is a significant advancement over traditional op-amps for driving differential input ADCs or transmitting signals over long lines. The AD8132 utilizes a unique internal feedback feature to achieve 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.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| −3 dB Bandwidth | ΔVOCM = 600 mV p-p | 350 | MHz | ||
| Slew Rate | ΔVOCM = 1.5 V to 3.5 V | 340 | V/μs | ||
| Input Voltage Noise (RTI) | f = 0.1 MHz to 100 MHz | 12 | nV/√Hz | ||
| Input Offset Voltage (RTI) | VOS, dm = VOUT, dm/2; VDIN+ = VDIN− = VOCM = 0 V | ±1.0 | ±3.5 mV | mV | |
| Input Bias Current | TA = 25°C | 3 | 7 | 8 μA (AD8132W) | μA |
| Input Resistance (Differential) | 12 MΩ | MΩ | |||
| Input Capacitance | 1 | pF | |||
| Output Voltage Swing (Maximum) | Single-ended output | 1.0 | 4.0 V | V | |
| Output Current | 50 | mA | |||
| Output Balance Error | ΔVOUT, cm/ΔVOUT, dm; ΔVOUT, dm = 1 V | −68 dB | dB |
Key Features
- High-Speed Operation: The AD8132 has a −3 dB bandwidth of 350 MHz and a slew rate of 340 V/μs, making it suitable for high-speed signal transmission.
- Low Power Consumption: It operates with a low power consumption of 10.7 mA at 5 V supply voltage.
- Internal Feedback Feature: The unique internal feedback feature provides output gain and phase matching, suppressing harmonics and reducing radiated EMI.
- Adjustable Common-Mode Level: The common-mode level of the differential output is adjustable by applying a voltage on the VOCM pin, allowing easy level shifting for driving single-supply ADCs.
- Automotive Grade Version: The AD8132W is qualified for 125°C operation per the AEC-Q100 standard, making it suitable for automotive applications.
- Compact Packaging: Available in 8-lead SOIC and 8-lead MSOP packages, suitable for a wide range of applications.
Applications
- Differential ADC Drivers: Ideal for driving differential input ADCs, preserving low frequency and DC information.
- Differential Gain and Filtering: Used for differential signal processing, including gain and filtering, to reduce ground noise effects.
- 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: The AD8132W version is used in automotive applications due to its AEC-Q100 qualification).
Q & A
- What is the primary function of the AD8132ARZ?
The AD8132ARZ is a differential or single-ended input to differential output amplifier with resistor set gain, designed for high-speed signal transmission and differential ADC driving.
- What is the bandwidth of the AD8132ARZ?
The AD8132ARZ has a −3 dB bandwidth of 350 MHz.
- What is the power consumption of the AD8132ARZ at 5 V supply voltage?
The power consumption is 10.7 mA at 5 V supply voltage.
- What is the unique internal feedback feature of the AD8132ARZ?
The unique internal feedback feature provides output gain and phase matching, suppressing harmonics and reducing radiated EMI.
- How can the common-mode level of the differential output be adjusted?
The common-mode level can be adjusted by applying a voltage on the VOCM pin.
- Is the AD8132ARZ suitable for automotive applications?
Yes, the AD8132W version is qualified for 125°C operation per the AEC-Q100 standard, making it suitable for automotive applications).
- What are the available package options for the AD8132ARZ?
The AD8132ARZ is available in 8-lead SOIC and 8-lead MSOP packages).
- What is the input resistance of the AD8132ARZ?
The differential input resistance is 12 MΩ, and the common-mode input resistance is 3.5 MΩ).
- What is the output current capability of the AD8132ARZ?
The output current capability is 50 mA).
- What is the output balance error of the AD8132ARZ?
The output balance error is −68 dB).
