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參數(shù)資料
| 型號(hào)： | AD5171BRJ50-RL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | 64-Position OTP Digital Potentiometer |
| 中文描述： | 50K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 64 POSITIONS, PDSO8 |
| 封裝： | MO-178-BA, SOT-23, 8 PIN |
| 文件頁數(shù)： | 14/20頁 |
| 文件大?。?/td> | 1722K |
| 代理商： | AD5171BRJ50-RL7 |
AD5171
CONTROLLING THE AD5171
There are two ways of controlling the AD5171. Users can either
program the devices with computer software or external I
2
C
controllers.
Software Programming
Due to the advantage of the one-time programmable feature,
users may consider programming the device in the factory
before shipping to end users. ADI offers a device programming
software, which can be implemented in the factory on PCs that
run Windows 95 to XP platforms. As a result, external control-
lers are not required, which significantly reduces development
time. The program is an executable file that does not require
easy to set up and use. Figure 33 shows the software interface. The software can be downloaded from
www.analog.com
.
Figure 33. AD5171 Computer Software Interface
Write
The AD5171 starts at midscale after power-up prior to the OPT
programming. To increment or decrement the resistance, the
user may simply move the scrollbar on the left. To write any
specific values, the user should use the bit pattern control in the
upper screen and press the Run button. The format of writing
data to the device is shown in Table 7. Once the desirable setting
is found, the user may press the Program Permanent button to
blow the internal fuse links for permanent setting. The user may
also set the programming bit pattern in the upper screen and
press the Run button to achieve the same result.
Read
To read the validation bits and data out from the device, the
user may simply press the Read button. The user may also set
the bit pattern in the upper screen and press the Run button.
The format of reading data out from the device is shown in
Table 8.
To apply the device programming software in the factory, users
need to modify a parallel port cable and configure Pins 2, 3, 15,
and 25 for SDA_write, SCL, SDA_read, and DGND, respectively
for the control signals (Figure 34). Users should also layout the
PCB of the AD5171 with SCL and SDA pads, as shown in
Figure 35, such that pogo pins can be inserted for the factory
programming.
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
SCL
R3
100
R2
100
R1
100
SDA
READ
WRITE
0
Figure 34. Parallel Port Connection. Pin 2 = SDA_write, Pin 3 = SCL,
Pin 15 = SDA_read, and Pin 25 = DGND
W
V
DD
DGND
SCL
A
B
AD0
SDA
0
Figure 35. Recommended AD5171 PCB Layout. The SCL and SDA pads allow
pogo pins to be inserted so that signals can be communicated through the
parallel port for programming (Figure 34).
Table 7. SDA Write Mode Bit Format
S
0
1
0
1
Slave Address Byte
1
0
AD0
0
A
T
X
X
Instruction Byte
X
X
X
X
X
A
X
X
D5
D4
Data Byte
D3
D2
D1
D0
A
P
Table 8. SDA Read Mode Bit Format
S
0
1
0
1
1
0
AD0
1
A
E1
E0
D5
D4
Data Byte
D3
D2
D1
D0
A
P
Slave Address Byte
Rev. PrC | Page 14 of 20
Preliminary Technical Data
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD5171BRJ5-R2 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
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| AD5171BRJZ100-R2 | 功能描述:IC DGTL POT OTP 100K I2C SOT23-8 RoHS:是 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) |
| AD5171BRJZ100-R7 | 功能描述:IC DGTL POT OTP 100K SOT23-8 RoHS:是 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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