Overview
The AD781JN, produced by Analog Devices Inc., is a high-speed monolithic sample-and-hold amplifier (SHA) designed to provide high accuracy and speed in sampling applications. This device is completely self-contained, including an on-chip hold capacitor, and does not require any external components or adjustments to perform the sampling function. The AD781JN is compatible with 12-bit A-to-D converters and is particularly suited for use in high-speed, high-resolution data acquisition systems.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Acquisition Time (10 V Step to 0.01%) | 600 | 700 | 700 | ns |
| Acquisition Time (10 V Step to 0.1%) | 500 | 600 | 600 | ns |
| Small Signal Bandwidth | 4 | 4 | 4 | MHz |
| Full Power Bandwidth | 1 | 1 | 1 | MHz |
| Effective Aperture Delay (25°C) | -35 | -25 | -15 | ns |
| Aperture Jitter (25°C) | 50 | 75 | 75 | ps |
| 250 | 500 | 500 | ns | |
| Droop Rate | 0.01 | 1 | 1 | µV/µs |
| Feedthrough (25°C) (VIN = ±5 V, 100 kHz) | -86 | -86 | -86 | dB |
| Hold Mode Offset | -4 | -1 | +3 | mV |
Key Features
- High-speed sampling with acquisition times as low as 600 ns for a 10 V step to 0.01% accuracy.
- Self-contained design with an on-chip hold capacitor, requiring no external components or adjustments.
- Low aperture jitter and effective aperture delay, ensuring precise sampling.
- Ultralow drift and high accuracy, with hold mode offset of ±3 mV maximum.
- Compatibility with high-speed, high-resolution A-to-D converters like the AD674 and AD7672.
- Self-correcting architecture to compensate for internal errors such as amplifier gain, offset, and charge injection errors.
Applications
The AD781JN is ideal for use in high-speed data acquisition systems, particularly those requiring high accuracy and fast throughput rates. It is suitable for applications involving multichannel data acquisition, high-resolution A-to-D converters, and systems where precise sampling and holding of analog signals are critical.
Q & A
- What is the AD781JN? The AD781JN is a high-speed monolithic sample-and-hold amplifier produced by Analog Devices Inc.
- What is the acquisition time of the AD781JN for a 10 V step to 0.01% accuracy? The acquisition time is typically 600-700 ns.
- Does the AD781JN require external components or adjustments? No, the AD781JN is self-contained and does not require any external components or adjustments.
- What is the aperture jitter of the AD781JN at 25°C? The aperture jitter is 50-75 ps.
- What is the hold mode offset of the AD781JN? The hold mode offset is -4 to +3 mV.
- Is the AD781JN compatible with high-speed A-to-D converters? Yes, it is compatible with high-speed, high-resolution A-to-D converters like the AD674 and AD7672.
- What is the self-correcting feature of the AD781JN? The AD781JN has a self-correcting architecture that compensates for internal errors such as amplifier gain, offset, and charge injection errors.
- What are the typical applications of the AD781JN? The AD781JN is used in high-speed data acquisition systems, multichannel data acquisition, and with high-resolution A-to-D converters.
- How does the AD781JN handle feedthrough at 100 kHz? The feedthrough at 100 kHz is -86 dB.
- What is the droop rate of the AD781JN? The droop rate is 0.01-1 µV/µs.
