AD7226

Features:

Four 8-Bit DACs with Output Amplifiers
Skinny 20-Pin DIP, SOIC and 20-Terminal Surface Mount Packages
Microprocessor Compatible
TTL/CMOS Compatible
No User Trims
Extended Temperature Range Operation
Single Supply Operation Possible


Application

Process Control
Automatic Test Equipment
Automatic Calibration of Large System Parameters,
e.g., Gain/Offset


Pinout




Specifications

V_DD to AGND  . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V, +17 V
V_DD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V, +17 V
V_SS to AGND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V, VDD
V_SS to DGND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V, VDD
V_DD to VSS  . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V, +24 V
AGND to DGND  . . . . . . . . . . . . . . . . . . . . . . . .     0.3 V, VDD
Digital Input Voltage to DGND  . . . . . . .   0.3 V, VDD + 0.3 V
V_REF to AGND  . . . . . . . . . . . . . . . . . . . . . . . . . .  0.3 V, VDD
V_OUT to AGND¹ . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSS, VDD
Power Dissipation (Any Package) to +75°C . . . . . . . .500 mW
Derates above 75°C by  . . . . . . . . . . . . . . . . . . . . 2.0 mW/°C


Description

The AD7226 contains four 8-bit voltage-output digital-to- analog converters, with output buffer amplifiers and interface logic on a single monolithic chip. No external trims are required to achieve full specified performance for the part.

Each D/A converter includes an output buffer amplifier capable of driving up to 5 mA of output current. The amplifiers' offsets are laser-trimmed during manufacture, thereby eliminating any requirement for offset nulling. Specified performance is guaranteed for input reference voltages from +2 V to +12.5 V with dual supplies. The part is also specified for single supply operation at a reference of +10 V. The AD7226 is fabricated in an all ion-implanted high speed Linear Compatible CMOS (LC2 MOS) process which has been specifically developed to allow high speed digital logic circuits and precision analog circuits to be integrated on the same chip.