The AD7569/AD7669 is a complete, 8-bit, analog I/O system on a single monolithic chip, which includes a high-speed successive approximation ADC, Track/Hold, DAC, and output amplifier.
The document describes the AD7569/AD7669 as a complete, 8-bit, analog I/O system on a single monolithic chip. The AD7569 contains a high speed successive approximation ADC with a 2 µs conversion time, a track/hold circuit, and a DAC with an output buffer amplifier. The AD7669 is similar but includes two DACs with output buffer amplifiers.
| ADC Conversion Time (External Clock) | 2 µs max |
|---|---|
| DAC Settling Time (Positive Full-Scale Change) | 2 µs max |
| Signal-to-Noise Ratio (SNR) | 44 dB min |
| Total Harmonic Distortion (THD) | 48 dB max |
| Supply Voltage Range (VDD) | 4.75/5.25 V min/V max |
| Input Voltage Ranges (Unipolar) | 0 to +1.25/+2.5 Volts |
The conversion time with an external clock is a maximum of 2 µs.
No, it provides everything necessary to interface a microprocessor to the analog world without external components or user trims.
The SNR is specified as 44 dB minimum for the AD7569 and 46 dB minimum for the AD7669.