The AD7824 and AD7828 are high speed, multichannel, 8-bit ADCs with a choice of four (AD7824) or eight (AD7828) multiplexed analog inputs. A half-flash conversion technique gives a fast conversion rate of 2.5 µs per channel, and the devices feature a built-in track-and-hold function. They operate on a single 5V supply, have low power consumption, fast conversion rate, and tight error specification.
The AD7824 (4‑channel) and AD7828 (8‑channel) are high‑speed, 8‑bit analog‑to‑digital converters fabricated in a linear CMOS process. They operate from a single 5 V supply, feature a built‑in track‑and‑hold function, and provide a conversion rate of 2.5 µs per channel. The devices use a half‑flash conversion technique that eliminates the need for an external clock.
The datasheet details electrical specifications, timing characteristics, absolute maximum ratings, pin configurations, and typical performance curves. It also includes application notes on reference handling, bipolar/unipolar operation, and sample‑and‑hold behavior, as well as an ordering guide for the various package options.
| Resolution | 8 bits |
|---|---|
| Supply Voltage | 5 V |
| Power Dissipation (typical) | 50 mW |
| Power Dissipation (maximum) | 80 mW |
| Total Unadjusted Error | ±½ LSB max |
Both devices operate from a single 5 V supply.
The AD7824 provides 4 analog input channels, while the AD7828 provides 8 channels.
Typical power dissipation is 50 mW, with a maximum of 80 mW.