AD7809BST

Product Summary

The AD7809BST is an octal 10-bit digital-to-analog converter with parallel load capabilities. It operates from a +3.3 V to +5 V (±10%) power supply and incorporates an on-chip reference. The AD7809BST provides output signals in the form of VBIAS ± VSWING. VSWING is derived internally from VBIAS. On-chip control registers include a system control register and channel control registers. The system control register has control over all DACs in the package. The channel control registers allow individual control of DACs. The complete transfer function of each individual DAC can be shifted around the VBIAS point using an on-chip Sub DAC. The AD7809BST contains double buffered data inputs, which allow all analog outputs to be simultaneously updated using the asynchronous LDAC input. The applications of the AD7809BST include Optical Disk Drives, Instrumentation and Communication Systems, Process Control and Voltage Setpoint Control, Trim Potentiometer Replacement and Automatic Calibration.

Parametrics

AD7809BST absolute maximum ratings: (1)DVDD to DGND: –0.3 V to +7 V; (2)AVDD to AGND: –0.3 V to +7 V; (3)AGND to DGND: –0.3 V + 0.3 V; (4)Digital Input Voltage to DGND: –0.3 V to DVDD + 0.3 V; (5)Analog Input Voltage to AGND: –0.3 V to AVDD + 0.3 V; (6)COMP to AGND: –0.3 V to AVDD + 0.3 V; (7)REF OUT to AGND : –0.3 V to + AVDD; (8)REF IN to AGND : –0.3 V to AVDD + 0.3 V; (9)VOUT to AGND2: –0.3 V to AVDD + 0.3 V; (10)Input Current to Any Pin Except Supplies: ±10 mA; (11)Operating Temperature Range: –40 to +85℃; (12)Storage Temperature Range: –65 to +150℃; (13)Junction Temperature: +150℃; (14)Power Dissipation: 450 mW; (15)θJA Thermal Impedance: 75℃/W; (16)Lead Temperature, Soldering, Vapor Phase (60 sec): +215℃, Infrared (15 sec) : +220℃.

Features

AD7809BST features: (1)Four 10-Bit DACs in One Package; (2)Serial and Parallel Loading Facilities Available, Octal 10-Bit Parallel Loading; (3)+3.3 V to +5 V Operation; (4)Power-Down Mode; (5)Power-On Reset; (6)Standby Mode (All DACs/Individual DACs); (7)Low Power All CMOS Construction; (8)10-Bit Resolution; (9)Double Buffered DAC Registers; (10)Dual External Reference Capability.

Diagrams