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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
APPLICATIONS
Automatic Adjustment
Trimmer Replacement
Vertical Deflection Amplitude Adjustment
Waveform Generation and Modulation GENERAL DESCRIPTION The AD8842 provides eight general purpose digitally controlled
voltage adjustment devices. The TrimDAC® capability allows
replacement of the mechanical trimmer function in new designs.
The AD8842 is ideal for ac or dc gain control of up to 50 kHz
bandwidth signals. The four-quadrant multiplying capability is
useful for signal inversion and modulation often found in video
vertical deflection circuitry.
Internally the AD8842 contains eight voltage output digital-toanalog converters, each with separate voltage inputs. A new …