Overview
The AD781JNZ is a high-speed monolithic sample-and-hold amplifier (SHA) produced by Analog Devices Inc. This component is designed to provide high-speed sampling with 12-bit accuracy in less than 700 ns. The AD781JNZ is completely self-contained, including an on-chip hold capacitor, and does not require any external components or adjustments to perform its sampling function. It features a proprietary self-correcting architecture that compensates for internal errors such as amplifier gain and offset errors, and charge injection errors, ensuring accurate signal holding in the hold mode.
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 |
| Hold Settling (to 1 mV, 25°C) | 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 12-bit accuracy in less than 700 ns.
- Self-contained with on-chip hold capacitor, requiring no external components or adjustments.
- Proprietary self-correcting architecture for compensating internal errors.
- Fast acquisition time and hold settling time, suitable for high-speed, high-resolution A-to-D converters.
- Low aperture jitter and effective aperture delay.
- Single-ended input and output signals referred to common.
Applications
The AD781JNZ is particularly useful in high-speed data acquisition systems, especially those requiring high accuracy and fast throughput rates. It is compatible with 12-bit A-to-D converters like the AD674 and AD7672. Typical applications include multichannel data acquisition systems, high-speed analog-to-digital conversion, and any system requiring precise and rapid signal sampling and holding.
Q & A
- What is the maximum acquisition time of the AD781JNZ?
The AD781JNZ guarantees a maximum acquisition time of 700 ns to 0.01% accuracy over temperature. - Does the AD781JNZ require external components for its operation?
No, the AD781JNZ is completely self-contained and does not require any external components or adjustments to perform its sampling function. - What is the small signal bandwidth of the AD781JNZ?
The small signal bandwidth of the AD781JNZ is 4 MHz. - How does the AD781JNZ correct for internal errors?
The AD781JNZ features a proprietary self-correcting architecture that compensates for internal errors such as amplifier gain and offset errors, and charge injection errors. - What is the aperture jitter of the AD781JNZ at 25°C?
The aperture jitter of the AD781JNZ at 25°C is 50 to 75 ps. - Can the AD781JNZ be used with high-speed A-to-D converters?
Yes, the AD781JNZ is compatible with high-speed, high-resolution A-to-D converters like the AD674 and AD7672. - What is the hold settling time of the AD781JNZ to 1 mV at 25°C?
The hold settling time of the AD781JNZ to 1 mV at 25°C is 250 to 500 ns. - What is the droop rate of the AD781JNZ?
The droop rate of the AD781JNZ is 0.01 to 1 µV/µs. - How does the AD781JNZ handle feedthrough at 25°C?
The AD781JNZ has a feedthrough of -86 dB at 25°C with VIN = ±5 V at 100 kHz. - What is the typical hold mode offset of the AD781JNZ?
The typical hold mode offset of the AD781JNZ is -4 to +3 mV.
