Overview
The AD815AYS from Analog Devices Inc. is a high-output current differential driver, consisting of two high-speed amplifiers. Each amplifier is capable of supplying a minimum of 500 mA, making it suitable for applications requiring high current drive. The device is typically configured as a differential driver, enabling an output signal of 40 V p-p on ±15 V supplies. This configuration can be further enhanced using a coupling transformer with a greater than 1:1 turns ratio. The AD815AYS is housed in a 24-lead SOIC (RB) package, which is robust and suitable for various industrial and communication applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Small Signal Bandwidth (–3 dB) | G = +1, ±15 V | 100 | 120 | MHz | |
| Bandwidth (0.1 dB) | G = +2, ±15 V | 40 | MHz | ||
| Differential Slew Rate | VOUT = 20 V p-p, G = +2, ±15 V | 800 | 900 | V/µs | |
| Settling Time to 0.1% | 10 V Step, G = +2, ±15 V | 70 | ns | ||
| Total Harmonic Distortion | f = 1 MHz, RL = 200 Ω | -66 | dB | ||
| Differential Input Bias Current | ±5 V, ±15 V | 10 | 75 | 100 | µA |
| Open-Loop Transresistance | ±5 V, ±15 V | 1.0 | 5.0 | 0.5 | MΩ |
| Voltage Swing (Single Ended) | RLOAD = 25 Ω, ±15 V | 11.0 | 11.7 | V |
Key Features
- Flexible Configuration: Can be configured as a differential driver or two single-ended drivers.
- High Output Current: Each amplifier can supply a minimum of 500 mA.
- High Speed and Bandwidth: Small signal bandwidth of up to 120 MHz and differential slew rate of up to 900 V/µs.
- Low Harmonic Distortion: Total harmonic distortion of –66 dB @ 1 MHz into 200 Ω.
- Industrial Temperature Range: Suitable for a wide range of industrial applications.
- Video Performance: Differential gain and phase of 0.05% and 0.45° into a load of 25 Ω, enabling up to 12 back-terminated loads to be driven.
Applications
- Communication Applications: Ideal for subscriber line interfaces for ADSL, HDSL, and VDSL due to its high current drive and wide bandwidth.
- Fast Dynamic Control: Suitable for fast dynamic control of coils or transformers.
- Video Applications: Can drive up to 12 back-terminated loads, making it suitable for video applications.
Q & A
- What is the typical output current of the AD815AYS?
The AD815AYS can supply a minimum of 500 mA per amplifier.
- What is the maximum small signal bandwidth of the AD815AYS?
The maximum small signal bandwidth is up to 120 MHz for G = +1 and ±15 V supplies.
- What is the differential slew rate of the AD815AYS?
The differential slew rate is up to 900 V/µs for VOUT = 20 V p-p and G = +2.
- What is the total harmonic distortion of the AD815AYS?
The total harmonic distortion is –66 dB @ 1 MHz into 200 Ω.
- What is the typical voltage swing for single-ended operation?
The typical voltage swing for single-ended operation is 11.7 V with RLOAD = 25 Ω and ±15 V supplies.
- What package type is the AD815AYS available in?
The AD815AYS is available in a 24-lead SOIC (RB) package.
- What are some common applications of the AD815AYS?
Common applications include subscriber line interfaces for ADSL, HDSL, and VDSL, as well as fast dynamic control of coils or transformers and video applications.
- What is the industrial temperature range of the AD815AYS?
The AD815AYS is suitable for a wide range of industrial temperatures.
- How many back-terminated loads can the AD815AYS drive?
The AD815AYS can drive up to 12 back-terminated loads.
- What is the settling time to 0.1% for the AD815AYS?
The settling time to 0.1% is 70 ns for a 10 V step and G = +2.
