参数资料
| 型号： | AD5274BRMZ-20 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 17/28页 |
| 文件大小： | 0K |
| 描述： | IC DGTL POT 20K 256POS 10MSOP |
| 标准包装： | 50 |
| 接片： | 256 |
| 电阻（欧姆）： | 20k |
| 电路数： | 1 |
| 温度系数： | 标准值 5 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | I²C |
| 电源电压： | 2.7 V ~ 5.5 V，±2.5 V ~ 2.75 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 管件 |
| 产品目录页面： | 787 (CN2011-ZH PDF) |
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AD5272/AD5274
Data Sheet
Rev. D | Page 24 of 28
EXT_CAP CAPACITOR
A 1 μF capacitor to VSS must be connected to the EXT_CAP pin
(see Figure 47) on power-up and throughout the operation of
the AD5272/AD5274.
AD5272/
AD5274
50_OTP
MEMORY
BLOCK
EXT_CAP
C1
1F
VSS
08
076
-00
9
Figure 47. EXT_CAP Hardware Setup
TERMINAL VOLTAGE OPERATING RANGE
The positive VDD and negative VSS power supplies of the
AD5272/AD5274 define the boundary conditions for proper
2-terminal digital resistor operation. Supply signals present on
Terminal A and Terminal W that exceed VDD or VSS are clamped
by the internal forward-biased diodes (see Figure 48).
VSS
VDD
A
W
08
076
-10
9
Figure 48. Maximum Terminal Voltages Set by VDD and VSS
The ground pins of the AD5272/AD5274 devices are primarily
used as digital ground references. To minimize the digital
ground bounce, join the AD5272/AD5274 ground terminal
remotely to the common ground. The digital input control
signals to the AD5272/AD5274 must be referenced to the
device ground pin (GND) and satisfy the logic level defined in
the Specifications section. An internal level shift circuit ensures
that the common-mode voltage range of the three terminals
extends from VSS to VDD, regardless of the digital input level.
POWER-UP SEQUENCE
Because there are diodes to limit the voltage compliance at
Terminal A and Terminal W (see Figure 48), it is important to
power VDD/VSS first before applying any voltage to Terminal A
and Terminal W; otherwise, the diode is forward-biased such
that VDD/VSS are powered unintentionally. The ideal power-up
sequence is VSS, GND, VDD, digital inputs, VA, and VW. The
order of powering VA, VW, and digital inputs is not important
as long as they are powered after VDD/VSS.
As soon as VDD is powered, the power-on preset activates, which
first sets the RDAC to midscale and then restores the last
programmed 50-TP value to the RDAC register.
相关PDF资料 |
PDF描述 |
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| MCP795W20-I/SL | IC RTCC 64B SRAM WD/DET 14SOIC |
| AD5271BRMZ-20 | IC DGTL POT 20K 256POS 10MSOP |
| MCP795W12-I/SL | IC RTCC 64B SRAM WD/DET 14SOIC |
| AD5274BRMZ-100 | IC RHEOSTAT 5V 50TP 256 10MSOP |
| MCP795W10-I/ST | IC RTCC 64B SRAM WD/DET 14TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD5274BRMZ-20 | 制造商:Analog Devices 功能描述:Digital Potentiometer IC |
| AD5274BRMZ-20-RL7 | 功能描述:IC DGTL POT 20K 256POS 10MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:3,000 系列:DPP 接片:32 电阻（欧姆）:10k 电路数:1 温度系数:标准值 300 ppm/°C 存储器类型:非易失 接口:3 线串行（芯片选择，递增，增/减） 电源电压:2.5 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 供应商设备封装:8-TDFN（2x3） 包装:带卷 (TR) |
| AD5280 | 制造商:AD 制造商全称:Analog Devices 功能描述:+15V, I2C Compatible Digital Potentiometers |
| AD5280BRU20 | 制造商:Analog Devices 功能描述:Digital Potentiometer 256POS 20KOhm Single 14-Pin TSSOP 制造商:Rochester Electronics LLC 功能描述:8-BIT I2C DIG POT - Bulk 制造商:Analog Devices 功能描述:IC DIGITAL POTENTIOMETER 8-BIT |
| AD5280BRU200 | 制造商:Analog Devices 功能描述:Digital Potentiometer 256POS 200KOhm Single 14-Pin TSSOP 制造商:Rochester Electronics LLC 功能描述:8-BIT I2C DIG POT - Bulk |
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