Overview
The AD8015AR, produced by Analog Devices Inc., is a wideband, single-supply transimpedance amplifier designed for use in fiber optic receiver circuits. It offers a complete, single-chip solution for converting photodiode current into a differential voltage output. With a bandwidth of 240 MHz, the AD8015AR supports data rates up to 155 Mbps and beyond, making it suitable for applications in SONET/SDH, FDDI, and Fibre Channel systems. The amplifier is known for its low cost, low noise, and wide dynamic range, making it an attractive alternative to GaAs-based transimpedance amplifiers.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Bandwidth (3 dB) | 180 | 240 | - | MHz |
| Pulse Width Modulation | - | 500 | - | ps |
| Rise and Fall Time (10% to 90%) | - | 1.5 | - | ns |
| Settling Time (to 3%, 0.5 V Diff Output Step) | - | 3 | - | ns |
| Linear Input Current Range | ±25 | ±30 | - | µA |
| Max Input Current Range Saturation | ±200 | ±350 | - | µA |
| Optical Sensitivity (155 Mbps, Avg Power) | -36 | - | - | dBm |
| Input Stray Capacitance (SOIC) | - | 0.4 | - | pF |
| Power Supply Voltage | - | 5 | - | V |
| Operating Temperature Range | -40 | - | 85 | °C |
Key Features
- Low cost and wide bandwidth of 240 MHz
- Low noise with input current noise of 3.0 pA/√Hz @ 100 MHz and total input RMS noise of 26.5 nA to 100 MHz
- Differential outputs compatible with ECL and PECL power supplies
- Wide dynamic range and optical sensitivity of –36 dBm @ 155.52 Mbps
- Low power consumption: 5 V @ 25 mA
- Wide operating temperature range: –40°C to +85°C
- Available in die form or 8-pin SOIC package
Applications
- Fiber Optic Receivers: SONET/SDH, FDDI, Fibre Channel
- Stable operation with high capacitance detectors
- Low noise preamplifiers
- Single-ended to differential conversion
- I-to-V converters
Q & A
- What is the bandwidth of the AD8015AR?
The bandwidth of the AD8015AR is 240 MHz.
- What are the typical rise and fall times of the AD8015AR?
The typical rise and fall times are 1.5 ns.
- What is the maximum input current range saturation for the AD8015AR?
The maximum input current range saturation is ±350 µA.
- What is the optical sensitivity of the AD8015AR at 155 Mbps?
The optical sensitivity is –36 dBm at 155 Mbps.
- What are the power supply options for the AD8015AR?
The AD8015AR can be used with a standard ECL power supply (–5.2 V) or a PECL (+5 V) power supply.
- What is the operating temperature range of the AD8015AR?
The operating temperature range is –40°C to +85°C.
- In what packages is the AD8015AR available?
The AD8015AR is available in die form or an 8-pin SOIC package.
- What are some common applications of the AD8015AR?
Common applications include fiber optic receivers for SONET/SDH, FDDI, and Fibre Channel, as well as low noise preamplifiers and single-ended to differential conversion.
- How does the AD8015AR handle high capacitance detectors?
The AD8015AR is designed for stable operation with high capacitance detectors, making it suitable for various fiber optic receiver applications.
- What is the input current noise of the AD8015AR at 100 MHz?
The input current noise is 3.0 pA/√Hz at 100 MHz.
