Overview
The AD8264ACPZ-R7, produced by Analog Devices Inc., is a quad, linear-in-dB, general-purpose variable gain amplifier (VGA) that includes a preamplifier (preamp) and a flexible differential output buffer. This device is designed for wide bandwidth applications, making it suitable for pulse processing and other high-speed signal handling tasks. Each channel of the AD8264 features a single-ended input preamp/VGA section, ensuring wide bandwidth and fast slew rates for low distortion in pulse applications. The amplifier operates from a bipolar power supply, enabling the amplification of negative voltage pulses, which is particularly useful in applications involving photodiodes or photomultiplier tubes (PMT).
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | ±2.5 | - | ±5 | V |
| Power Consumption (Quiescent Current) | 65 | 79 | 88 | mA (VS = ±2.5 V) |
| Power Consumption (Quiescent Current) | 70 | 85 | 95 | mA (VS = ±3.3 V) |
| Power Consumption (Quiescent Current) | 81 | 99 | 110 | mA (VS = ±5 V) |
| Power Dissipation | 395 | - | - | mW (VS = ±2.5 V) |
| Power Dissipation | 560 | - | - | mW (VS = ±3.3 V) |
| Power Dissipation | 990 | - | - | mW (VS = ±5 V) |
| −3 dB Bandwidth (Preamp/VGA) | DC | - | 235 MHz | - |
| −3 dB Bandwidth (Differential Driver) | - | - | 80 MHz | - |
| Gain Control Interface | - | - | 20 dB/V | - |
| Operating Temperature | −40°C | - | +85°C | - |
| Package Type | - | - | 40-Lead LFCSP (6mm x 6mm w/ EP) | - |
Key Features
- Quad-channel design with independent gain adjustment for each channel, referenced to a single pin (GNLO).
- Linear-in-dB gain control with a precise 20 dB/V scale, facilitating easy interface with external circuits.
- DC-coupled operation with wide bandwidth: −3 dB bandwidth of the preamp/VGA is DC to 235 MHz, and the differential driver bandwidth is 80 MHz.
- Flexible differential output buffer with common-mode and offset adjustments, enabling direct coupling to high-speed analog-to-digital converters (ADCs).
- Operation from a bipolar power supply, allowing amplification of negative voltage pulses, which is useful for photodiodes or photomultiplier tubes (PMT).
- Low power consumption: 140 mW per channel at ±3.3 V supply voltage.
Applications
- Multichannel data acquisition.
- Positron emission tomography (PET).
- Gain trim applications.
- Industrial and medical ultrasound.
- Radar receivers.
- Pulse processing and wideband video signal processing.
Q & A
- What is the AD8264ACPZ-R7?
The AD8264ACPZ-R7 is a quad, linear-in-dB, general-purpose variable gain amplifier (VGA) with a preamplifier and a flexible differential output buffer, produced by Analog Devices Inc..
- What is the bandwidth of the preamp/VGA section?
The −3 dB bandwidth of the preamp/VGA section is DC to 235 MHz.
- What is the bandwidth of the differential driver?
The bandwidth of the differential driver is 80 MHz.
- How does the gain control interface work?
The gain control interface provides a precise linear-in-dB scale of 20 dB/V.
- What are the typical applications of the AD8264?
The AD8264 is used in multichannel data acquisition, positron emission tomography, gain trim applications, industrial and medical ultrasound, and radar receivers.
- What is the power consumption per channel?
The power consumption per channel is approximately 140 mW at ±3.3 V supply voltage.
- What type of power supply does the AD8264 require?
The AD8264 operates from a bipolar power supply, allowing it to amplify negative voltage pulses.
- What package type is the AD8264ACPZ-R7 available in?
The AD8264ACPZ-R7 is available in a 40-Lead LFCSP (6mm x 6mm w/ EP) package.
- What is the operating temperature range of the AD8264?
The operating temperature range is −40°C to +85°C.
- Can the AD8264 be used for active calibration or as a trim amplifier?
Yes, each section of the AD8264 can be used for active calibration or as a trim amplifier when combined with a multioutput digital-to-analog converter (DAC).
