The AD775 is a CMOS, low power, 8-bit, 20 MSPS sampling analog-to-digital converter (ADC). The AD775 features a built-in sampling function and on-chip reference bias resistors to provide a complete 8-bit ADC solution. The AD775 utilizes a pipelined/ping pong two-step flash architecture to provide high sampling rates (up to 35 MHz) while maintaining very low power consumption (60 mW). Its combination of excellent DNL, fast sampling rate, low differential gain and phase errors, extremely low power dissipation, and single +5 V supply operation make it an ideal choice for various applications.
The AD775 provides a complete 8‑bit ADC solution with a pipelined two‑step flash architecture, delivering up to 35 MHz sampling while consuming only 60 mW from a single +5 V supply. It includes on‑chip reference bias resistors, three‑state outputs, and a small 11 pF input capacitance, making it suitable for video and image acquisition applications.
The device is offered in 24‑pin 300‑mil SOIC and 24‑pin 400‑mil DIP packages and operates over an extended commercial temperature range (‑20 °C to +75 °C). Detailed specifications cover resolution, linearity, power, timing, and pin functions, and an evaluation board schematic is provided for reference designs.
| Resolution | 8 Bits |
|---|---|
| Maximum Conversion Rate | 35 MHz |
| Power Consumption | 60 mW |
| Input Capacitance | 11 pF |
| Differential Nonlinearity | ±0.3 LSB |
| Differential Gain Error | 1.0 % |
| Differential Phase Error | 0.5 Degrees |
| Supply Voltage | +5 V Single Supply |
| Operating Temperature Range | -20 °C to +75 °C |
The AD775 typically consumes 60 mW at a 5 V supply.
The device has an input capacitance of about 11 pF.
The converter can operate at up to 35 MHz sampling rate.