The AD8842 is an 8-bit octal, 4-quadrant multiplying, CMOS TrimDAC that features low cost, replaces 8 potentiometers, 50 kHz 4-quadrant multiplying bandwidth, low zero output error, eight individual channels, 3-wire serial input, 500 kHz update data loading rate, ±3 V output swing, midscale preset, zero volts out.
The AD8842 is an 8‑channel, 8‑bit TrimDAC that replaces up to eight potentiometers. It provides four‑quadrant multiplication, a ±3 V output swing, and a 50 kHz full‑power bandwidth, making it suitable for automatic gain control, waveform generation and vertical deflection adjustment. The device uses a three‑wire serial interface (CLK, SDI, LD) with a 12‑bit data word, allowing easy cascading of multiple devices.
The datasheet includes detailed electrical characteristics, timing specifications, absolute maximum ratings, and typical performance graphs. Mechanical dimensions for both PDIP and SOIC packages are provided, along with ESD handling guidelines and recommended layout practices.
| Resolution | 8 Bits |
|---|---|
| Update Data Loading Rate | 500 kHz |
| Output Swing | ±3 V |
| Power Dissipation | 95 mW |
| Supply Voltage Range | ±5 V |
| Number of Channels | 8 |
| Maximum Output Current | 3 mA per channel |
The AD8842 can load new data at a rate of 500 kHz.
The device offers eight independent voltage‑adjustment channels.
It consumes about 95 mW from ±5 V supplies.