The AD781 is a high speed monolithic sample-and-hold amplifier (SHA). The AD781 guarantees a maximum acquisition time of 700 ns to 0.01% over temperature. The AD781 is specified and tested for hold mode total harmonic distortion and hold mode signal-to-noise and distortion. The AD781 is configured as a unity gain amplifier and uses a self-correcting architecture that minimizes hold mode errors and insures accuracy over temperature. The AD781 is self-contained and requires no external components or adjustments. The low power dissipation, 8-pin mini-DIP package and completeness make the AD781 ideal for highly compact board layouts. The AD781 will acquire a full-scale input in less than 700 ns and retain the held value with a droop rate of 0.01 µV/µs. Excellent linearity and hold mode dc and dynamic performance make the AD781 ideal for 12- and 14-bit high speed analog-to-digital conversion.
The AD781 is a complete sample‑and‑hold amplifier (SHA) designed for high‑speed, high‑accuracy data‑conversion systems. It features a 700 ns acquisition time to 0.01 % accuracy, low aperture jitter (75 ps), low droop rate (0.01 µV/µs), and a self‑correcting architecture that requires no external components.
The datasheet provides detailed electrical specifications, temperature‑grade options (J, A, S), package information (8‑pin mini‑DIP and Cerdip), and application guidance such as grounding, decoupling, and driving requirements for optimal performance with 12‑bit ADCs.
| Acquisition Time (to 0.01%) | 700 ns |
|---|---|
| Power Consumption (typical) | 95 mW |
| Droop Rate | 0.01 µV/µs |
| Aperture Jitter (typical) | 75 ps |
| Total Harmonic Distortion (max) | -80 dB |
| Input Voltage Range | -5 V to +5 V |
| Supply Current (typical) | 6.5 mA |
The AD781 achieves an acquisition time of 700 ns to 0.01 % accuracy.
Typical power consumption is 95 mW, with a maximum of 185 mW.
The AD781 is offered in three grades: J (0 °C to +70 °C), A (‑40 °C to +85 °C), and S (‑55 °C to +125 °C).