Product Summary

The AD7845AQ is a 4-quadrant multiplying D/A converter with an on-chip amplifier. It is fabricated on the LC2MOS process, which allows precision linear components and digital circuitry to be implemented on the same chip. The applications of the AD7845AQ include Automatic Test Equipment, Digital Attenuators, Programmable Power Supplies, Programmable Gain Amplifiers and Digital-to-4–20 mA Converters.

Parametrics

AD7845AQ absolute maximum ratings: (1)VDD to DGND: –0.3 V to +17 V; (2)VSS to DGND: +0.3 V to –17 V; (3)VREF to AGND: VDD + 0.3 V, VSS – 0.3 V; (4)VRFB to AGND: VDD + 0.3 V, VSS – 0.3 V; (5)VRA to AGND: VDD + 0.3 V, VSS – 0.3 V; (6)VRB to AGND: VDD + 0.3 V, VSS – 0.3 V; (7)VRC to AGND: VDD + 0.3 V, VSS – 0.3 V; (8)VOUT to AGND2: VDD + 0.3 V, VSS – 0.3 V; (9)AGND to DGND: –0.3 V, VDD; (10)Digital Input Voltage to DGND: –0.3 V to VDD + 0.3 V; (11)Power Dissipation (Any Package) To +75℃: 650 mW; Derates above +75℃: 10 mW/℃.

Features

AD7845AQ features: (1)12-Bit CMOS MDAC with Output Amplifier; (2)4-Quadrant Multiplication; (3)Guaranteed Monotonic (TMIN to TMAX); (4)Space-Saving 0.3" DIPs and 24- or 28-Terminal Surface Mount Packages; (5)Application Resistors On Chip for Gain Ranging, etc; (6)Low Power LC2MOS.

Diagrams

AD7845AQ functional block diagram

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