The AD7575 is a high speed 8-bit ADC with a built-in track/hold function. The successive approximation conversion technique is used to achieve a fast conversion time of 5 µs, while the built-in track/hold allows full-scale signals up to 50 kHz (386 mV/µs slew rate) to be digitized. The AD7575 requires only a single +5 V supply and a low cost, 1.23 V bandgap reference in order to convert an input signal range of 0 to 2 VREF. The AD7575 is designed for easy interfacing to all popular 8-bit microprocessors using standard microprocessor control signals (CS and RD) to control starting of the conversion and reading of the data. The interface logic allows the AD7575 to be easily configured as a memory mapped device, and the part can be interfaced as SLOW-MEMORY or ROM. All data outputs of the AD7575 are latched and three-state buffered to allow direct connection to a microprocessor data.
The AD7575 is a high‑speed 8‑bit analog‑to‑digital converter with an on‑chip track‑and‑hold function. It uses successive‑approximation conversion to achieve a 5 ms conversion time and can handle full‑scale signals up to 50 kHz. The device operates from a single +5 V supply and a 1.23 V band‑gap reference, making it suitable for direct interfacing with popular 8‑bit microprocessors.
The datasheet provides detailed electrical specifications, timing diagrams for both slow‑memory and ROM interfaces, pin configurations for DIP, SOIC and surface‑mount packages, and guidelines for clocking and ESD protection. Ordering information and package options are also listed.
| Resolution | 8 bits |
|---|---|
| Conversion Time (external clock) | 5 ms |
| Supply Voltage | +5 V |
| Reference Voltage | 1.23 V |
| Power Dissipation | 15 mW typ |
| Input Voltage Range | 0 to 2 VREF |
The AD7575 converts an input in 5 ms when using an external 4 MHz clock.
It operates from a single +5 V supply together with a 1.23 V band‑gap reference.
VDD may be as low as –0.3 V or as high as +7 V relative to AGND or DGND.