Overview
The AD8115AST, produced by Analog Devices Inc., is a high-speed, 16 × 16 video crosspoint switch matrix. This component is designed for high-performance signal switching applications, offering a −3 dB signal bandwidth greater than 200 MHz and channel switch times of less than 50 ns with 1% settling. The AD8115AST is part of the AD8114/AD8115 family, with the AD8115 specifically having a gain of 2. It is ideal for various high-speed applications due to its excellent video performance, low crosstalk, and high isolation.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| −3 dB Bandwidth | 200 | 225 | - | MHz (RL = 150 Ω, 200 mV p-p) |
| Gain Flatness | 0.1 dB | - | - | - (25 MHz, RL = 150 Ω, 200 mV p-p) |
| Propagation Delay | 5 ns | - | - | - (2 V p-p, RL = 150 Ω) |
| Settling Time | 40 ns | - | - | - (0.1%, 2 V step, RL = 150 Ω) |
| Slew Rate | 375 V/µs | - | - | - (2 V step, RL = 150 Ω) |
| Differential Gain Error | 0.05% | - | - | - (NTSC or PAL, RL = 1 kΩ) |
| Differential Phase Error | 0.05° | - | - | - (NTSC or PAL, RL = 1 kΩ) |
| Supply Voltage Range | ±4.5 V | ±5 V | ±5.5 V | - |
| Idle Current | - | 70 mA | - | - |
| Operating Temperature Range | −40°C | - | +85°C | - |
| Package Type | - | - | - | 100-Lead LQFP (14 mm × 14 mm) |
Key Features
- 16 × 16 high-speed nonblocking switch matrix
- −3 dB signal bandwidth greater than 200 MHz
- Channel switch times of less than 50 ns with 1% settling
- Low crosstalk of −70 dB and high isolation of −98 dB at 5 MHz
- Differential gain and differential phase errors of better than 0.05% and 0.05°, respectively
- Gain flatness of 0.1 dB out to 25 MHz while driving a 75 Ω back-terminated load
- 16 independent output buffers with programmable high impedance outputs
- Serial and parallel digital control for channel switching
- Reset pin for disabling all outputs
- Low power consumption of 700 mW (2.75 mW per point)
- Extended industrial temperature range of −40°C to +85°C
Applications
- Routing of high-speed signals, including video (NTSC, PAL, S, SECAM, YUV, RGB)
- Compressed video (MPEG, wavelet)
- 3-level digital video (HDB3)
- Data communications
- Telecommunications
Q & A
- What is the −3 dB signal bandwidth of the AD8115AST?
The −3 dB signal bandwidth of the AD8115AST is greater than 200 MHz.
- What are the channel switch times of the AD8115AST?
The channel switch times are less than 50 ns with 1% settling.
- What is the crosstalk and isolation performance of the AD8115AST?
The AD8115AST has a crosstalk of −70 dB and isolation of −98 dB at 5 MHz.
- What are the differential gain and phase errors of the AD8115AST?
The differential gain and phase errors are better than 0.05% and 0.05°, respectively.
- How many output buffers does the AD8115AST have, and what is their gain?
The AD8115AST has 16 independent output buffers with a gain of 2.
- What is the power consumption of the AD8115AST?
The power consumption is 700 mW (2.75 mW per point).
- What is the operating temperature range of the AD8115AST?
The operating temperature range is −40°C to +85°C.
- What package type is the AD8115AST available in?
The AD8115AST is available in a 100-Lead LQFP (14 mm × 14 mm) package.
- How is the channel switching controlled in the AD8115AST?
The channel switching is controlled via serial or parallel digital control, allowing for daisy-chaining and individual output updates.
- What is the purpose of the reset pin in the AD8115AST?
The reset pin allows for disabling all outputs and provides power-on reset capability when connected through a capacitor to ground.
