參數(shù)資料
型號(hào)： AD5170BRM100-RL7
廠商： ANALOG DEVICES INC
元件分類： 數(shù)字電位計(jì)
英文描述： 256-Position Two-Time Programmable I2C Digital Potentiometer
中文描述： 100K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO10
封裝： 3 X 4.90 MM, MO-187BA, MSOP-10
文件頁(yè)數(shù)： 15/24頁(yè)
文件大?。?/td> 900K
代理商： AD5170BRM100-RL7
AD5170
the 2.7 V system voltage is applied first, and the P1 and P2 gates
are pulled to ground, thus turning on P1 and subsequently P2.
As a result, V
DD
of the AD5170 approaches 2.7 V. When the
AD5170 setting is found, the factory tester applies the V
DD_OTP
to both the V
DD
and the MOSFETs gates turning off P1 and P2.
The OTP command is executed at this time to program the
AD5170 while the 2.7 V source is protected. Once the fuse
programming is completed, the tester withdraws the V
DD_OTP
and the setting for AD5170 is permanently fixed.
Rev. A | Page 15 of 24
AD5170 achieves the OTP function through blowing internal
fuses. Users should always apply the 5.25 V to 5.5 V one-time
program voltage requirement at the first fuse programming
attempt. Failure to comply with this requirement may lead to a
change in the fuse structures, rendering programming
inoperable.
Poor PCB layout introduces parasitics that may affect the fuse
programming. Therefore, it is recommended to add a 10 μF
tantalum capacitor in parallel with a 1 nF ceramic capacitor as
close as possible to the V
DD
pin. The type and value chosen for
both capacitors are important. This combination of capacitor
values provides both a fast response and larger supply current
handling with minimum supply droop during transients. As a
result, these capacitors increase the OTP programming success
by not inhibiting the proper energy needed to blow the internal
fuses. Additionally, C1
minimizes transient disturbance and low
frequency ripple while C2 reduces high frequency noise during
normal operation.
LAYOUT CONSIDERATIONS
It is good practice to employ 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.
Note that the digital ground should also be joined remotely to
the analog ground at one point to minimize the ground bounce.
V
DD
GND
V
DD
C1
10
μ
F
C2
1nF
AD5170
+
0
Figure 40. Power Supply Bypassing
相關(guān)PDF資料
PDF描述
AD5170BRM2.5-RL7 256-Position Two-Time Programmable I2C Digital Potentiometer
AD5170BRM50 256-Position Two-Time Programmable I2C Digital Potentiometer
AD5170BRM50-RL7 256-Position Two-Time Programmable I2C Digital Potentiometer
AD5170BRM2.5 256-Position Two-Time Programmable I2C Digital Potentiometer
AD5170 256-Position Two-Time Programmable I2C Digital Potentiometer
相關(guān)代理商/技術(shù)參數(shù)
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AD5170BRM50 功能描述:IC DGTL POT 50K 256POS 10-MSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 300 ppm/°C 存儲(chǔ)器類型:非易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.5 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN（2x3） 包裝:帶卷 (TR)
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