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参数资料
| 型号： | AD5246BKS5-R2 |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 数字电位计 |
| 英文描述： | 128-Position I2C Compatible Digital Resistor |
| 中文描述： | 5K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 128 POSITIONS, PDSO6 |
| 封装： | 2 X 2.10 MM, MO-203AB, SC-70, 6 PIN |
| 文件页数： | 14/20页 |
| 文件大小： | 991K |
| 代理商： | AD5246BKS5-R2 |
AD5246
TERMINAL VOLTAGE OPERATING RANGE
The AD5246 V
DD
and GND power supply defines the boundary
conditions for proper 3-terminal digital potentiometer
operation. Supply signals present on terminals B and W that
exceed V
DD
or GND will be clamped by the internal forward
biased diodes (see
).
Figure 32
Figure 32. Maximum Terminal Voltages Set by V
DD
and GND
igure 32
B
V
DD
W
GND
0
MAXIMUM OPERATING CURRENT
At low code values, the user should be aware that due to low
resistance values, the current through the RDAC may exceed
the 5 mA limit. In F
, a 5 V supply is placed on the wiper,
and the current through terminals W and B is plotted with
respect to code. A line is also drawn denoting the 5 mA current
limit. Note that at low code values (particularly for the 5 kΩ and
10 kΩ options), the current level increases significantly. Care
should be taken to limit the current flow between W and B in
this state to a maximum continuous current of 5 mA and a
maximum pulse current of no more than 20 mA. Otherwise,
degradation or possible destruction of the internal switch
contacts can occur.
igure 33
Figure 33. Maximum Operating Current
CODE (Decimal)
I
0
0.01
0.10
1.00
10.00
16
32
48
64
80
96
112
128
100.00
0
5mA CURRENT LIMIT
R
AB
= 5k
R
AB
= 10k
R
AB
= 100k
R
AB
= 50k
POWER-UP SEQUENCE
Since the ESD protection diodes limit the voltage compliance at
terminals B and W (see F
V
DD
/GND before applying any voltage to terminals B and W;
otherwise, the diode will be forward biased such that V
DD
will be
powered unintentionally and may affect the rest of the user’s
circuit. The ideal power-up sequence is in the following order:
GND, V
DD
, digital inputs, and then V
B
/V
W
. The relative order of
powering V
B
and V
W
and the digital inputs is not important as
long as they are powered after V
DD
/GND.
), it is important to power
LAYOUT AND POWER SUPPLY BYPASSING
It is a good practice to employ a compact, minimum lead-length
layout design. The leads to the inputs should be as direct as
possible with a minimum conductor length. Ground paths
should have low resistance and low inductance.
Similarly, it is a good practice to bypass the power supplies with
quality capacitors for optimum stability. Supply leads to the
device should be bypassed with 0.01 μF to 0.1 μF disc or chip
ceramic capacitors. Low ESR 1 μF to 10 μF tantalum or
electrolytic capacitors should also be applied at the supplies to
minimize any transient disturbance and low frequency ripple
(see
). Note that the digital ground should also be
joined remotely to the analog ground at one point to minimize
the ground bounce.
Figure 34
Figure 34. Power Supply Bypassing
AD5246
V
DD
C1
C3
GND
10
μ
F
0.1
μ
F
+
V
DD
0
Rev. 0 | Page 14 of 20
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD5246BKS5-RL7 | 制造商:Analog Devices 功能描述:Digital Potentiometer 128POS 5KOhm Single 6-Pin SC-70 T/R 制造商:Rochester Electronics LLC 功能描述:7-BIT I2C DIG TRIMMER - Tape and Reel |
| AD5246BKSZ100-R2 | 功能描述:IC DGTL RES 100K I2C SC70-6 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) |
| AD5246BKSZ100-RL7 | 功能描述:IC DGTL RES 100K I2C SC70-6 RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 接片:256 电阻（欧姆）:100k 电路数:1 温度系数:标准值 35 ppm/°C 存储器类型:非易失 接口:3 线串口 电源电压:2.7 V ~ 5.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WDFN 裸露焊盘 供应商设备封装:8-TDFN-EP（3x3） 包装:剪切带 (CT) 产品目录页面:1399 (CN2011-ZH PDF) 其它名称:MAX5423ETA+TCT |
| AD5246BKSZ10-R2 | 制造商:Analog Devices 功能描述:128 POSITION I2C COMPATIBLE PROGRAMMABLE RESISTOR IN SC70 PK - Tape and Reel |
| AD5246BKSZ10-RL7 | 功能描述:IC POT DGTL RES 128POS SC70-6 RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 接片:256 电阻（欧姆）:100k 电路数:1 温度系数:标准值 35 ppm/°C 存储器类型:非易失 接口:3 线串口 电源电压:2.7 V ~ 5.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WDFN 裸露焊盘 供应商设备封装:8-TDFN-EP（3x3） 包装:剪切带 (CT) 产品目录页面:1399 (CN2011-ZH PDF) 其它名称:MAX5423ETA+TCT |
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