器件名称: AD8804AN
功能描述: 12 Channel, 8-Bit TrimDACs with Power Shutdown
文件大小: 432.3KB 共16页
简 介:a
FEATURES Low Cost Replaces 12 Potentiometers Individually Programmable Outputs 3-Wire SPI Compatible Serial Input Power Shutdown <55 Watts Including IDD & IREF Midscale Preset, AD8802 Separate VREFL Range Setting, AD8804 +3 V to +5 V Single Supply Operation APPLICATIONS Automatic Adjustment Trimmer Replacement Video and Audio Equipment Gain and Offset Adjustment Portable and Battery Operated Equipment
12 Channel, 8-Bit TrimDAC with Power Shutdow AD8802/AD8804
FUNCTIONAL BLOCK DIAGRAM
CS CLK
D7
AD8802/AD8804
DAC 1 DAC REG #1
D0 R
VDD VREFH O1 O2 O3 O4 O5 O6 O7 O8 O9 O10 O11 O12
D11 D10 D9 D8 D7
EN
ADDR DEC
SER REG SDI
D D0 D7
DAC 12 DAC REG #12
R
8 D0
SHDN
GENERAL DESCRIPTION
The 12-channel AD8802/AD8804 provides independent digitallycontrollable voltage outputs in a compact 20-lead package. This potentiometer divider TrimDAC allows replacement of the mechanical trimmer function in new designs. The AD8802/ AD8804 is ideal for dc voltage adjustment applications. Easily programmed by serial interfaced microcontroller ports, the AD8802 with its midscale preset is ideal for potentiometer replacement where adjustments start at a nominal value. Applications such as gain control of video amplifiers, voltage controlled frequencies and bandwidths in video equipment, geometric correction and automatic adjustment in CRT computer graphic displays are a few of the many applications ideally suited for these parts. The AD8804 provides independent control of both the top and bot……
