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ADN2850ACP25-RL7 PDF预览

ADN2850ACP25-RL7

更新时间: 2024-02-29 21:35:06
品牌 Logo 应用领域
亚德诺 - ADI 转换器数字电位计电阻器
页数 文件大小 规格书
18页 267K
描述
Nonvolatile Memory, Dual 1024 Position Programmable Resistors

ADN2850ACP25-RL7 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:QFN包装说明:5 X 5 MM, LFCSP-16
针数:16Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.86Is Samacsys:N
其他特性:LINEAR OR LOG TAPER SETTINGS; NONVOLATILE MEMORY; CAN ALSO OPERATE FROM +/-2.25V TO +/-2.75V SUPPLY控制接口:3-WIRE SERIAL
转换器类型:DIGITAL POTENTIOMETERJESD-30 代码:S-XQCC-N16
JESD-609代码:e0长度:5 mm
功能数量:2位置数:1024
端子数量:16最高工作温度:85 °C
最低工作温度:-40 °C封装主体材料:UNSPECIFIED
封装代码:VQCCN封装形状:SQUARE
封装形式:CHIP CARRIER, VERY THIN PROFILE峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified电阻定律:LOGARITHMIC
最大电阻容差:30%最大电阻器端电压:5 V
最小电阻器端电压:座面最大高度:1 mm
标称供电电压:5 V表面贴装:YES
标称温度系数:35 ppm/ °C温度等级:INDUSTRIAL
端子面层:TIN LEAD端子形式:NO LEAD
端子节距:0.8 mm端子位置:QUAD
处于峰值回流温度下的最长时间:NOT SPECIFIED标称总电阻:25000 Ω
宽度:5 mmBase Number Matches:1

ADN2850ACP25-RL7 数据手册

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PRELIMINARY TECHNICAL DATA  
Nonvolatile Memory, Dual 1024  
Position Programmable Resistors  
a
Preliminary Technical Data  
ADN2850  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
Dual, 1024 Position Resolution  
25K, 250K Ohm Full Scale Resistance  
Low Temperature Coefficient -- 35ppm/°C  
Nonvolatile Memory1 Preset Maintains Wiper Settings  
Wiper Settings Read Back  
ADDRESS  
RDAC1  
CS  
DECODE  
REGISTER  
CLK  
SERIAL  
INPUT  
REGISTER  
W1  
B1  
SDI  
EEMEM1  
SDO  
Linear Increment/Decrement  
RDAC1  
Log taper Increment/Decrement  
SPI Compatible Serial Interface  
RDAC2  
+3V to +5V Single Supply or ±2.5V Dual Supply  
26 bytes User Nonvolatile Memory for Constant Storage with  
Current Monitoring Configurable Function  
PWR ON  
PRESET  
REGISTER  
PR  
W2  
B2  
WP  
EEMEM  
CONTROL  
EEMEM2  
RDY  
RDAC1  
APPLICATIONS  
SONET, SDH, ATM, Gigabit Ethernet, DWDM Laser Diode  
Driver Optical Supervisory Systems  
I
V
V
1
DD  
1
CURRENT  
MONITOR  
26 BYTES  
USER EEMEM  
V
SS  
I
V
2
2
GND  
GENERAL DESCRIPTION  
The ADN2850 provides dual channel, digitally controlled  
programmable resistors2 with resolution of 1024 positions. These  
devices perform the same electronic adjustment function as a  
mechanical rheostat. The ADN2850’s versatile programming via a  
standard serial interface allows sixteen mode of operations and  
adjustment including scratch pad programming, memory storing  
and retrieving, increment/decrement, log taper adjustment, wiper  
setting readback, and extra user defined EEMEM.  
100%  
75%  
50%  
25%  
In the scratch pad programming mode, a specific setting can be  
programmed directly to the RDAC2 register, which sets the  
resistance between terminals W-and-B. The RDAC register can  
also be loaded with a value previously stored in the EEMEM1  
register. The value in the EEMEM can be changed or protected.  
When changes are made to the RDAC register, the value of the new  
setting can be saved into the EEMEM. Thereafter, such value will  
be transferred automatically to the RDAC register during system  
power ON. It is enabled by the internal preset strobe. EEMEM can  
also be retrieved through direct programming and external preset  
pin control.  
0%  
0
256  
512  
768  
1023  
D - Code in De cim al  
Other key mode of operations include linear step increment and  
decrement commands such that the setting in the RDAC register  
can be moved UP or DOWN, one step at a time. For logarithmic  
changes in wiper setting, a left/right bit shift command adjusts the  
level in ±6dB steps.  
Figure 1. RWB(D) vs Decimal Code  
Notes:  
1.  
2.  
The term nonvolatile memory and EEMEM are used interchangebly  
The term programmable resistor and RDAC are used interchangebly  
The ADN2850 is available in the 5mm x 5mm LFCSP-16 Lead  
Frame Chip Scale and thin TSSOP-16 packages. All parts are  
guaranteed to operate over the extended industrial temperature  
range of -40°C to +85°C.  
REV PrH, 13, AUG 2001  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use; nor for any infringements of patents or  
other rights of third parties which may result from its use. No license is granted by implication  
or otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 U.S.A.  
Tel: 617/329-4700 Fax:617/326-8703  

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