- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373871 > AD5222BRU50 (ANALOG DEVICES INC) Increment/Decrement Dual Digital Potentiometer PDF資料下載
參數(shù)資料
| 型號： | AD5222BRU50 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 音頻控制 |
| 英文描述： | Increment/Decrement Dual Digital Potentiometer |
| 中文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO14 |
| 封裝： | TSSOP-14 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 173K |
| 代理商： | AD5222BRU50 |
AD5222
–8–
REV. 0
OPERATION
The AD5222 provides a 128-position, digitally-controlled, variable
resistor (VR) device. Changing the VR settings is accomplished
by pulsing the CLK pin while
CS
is active low. The U/
D
(UP/
DOWN) control input pin controls the direction of the increment.
When the wiper hits the end of the resistor (Terminal A or B)
additional CLK pulses no longer change the wiper setting. The
wiper position is immediately decoded by the wiper decode logic
changing the wiper resistance. Appropriate debounce circuitry is
required when push-button switches are used to control the
count sequence and direction of count. The exact timing require-
ments are shown in Figure 2. The AD5222 powers ON in a
centered wiper position, exhibiting nearly equal resistances of
R
WA
and R
WB
.
DECODE
UP/DOWN
COUNTER
AD5222
V
SS
A1
W1
B1
DECODE
UP/DOWN
COUNTER
A2
W2
B2
POR
DAC
SELECT
AND
ENABLE
CLK
CS
U/
D
DACSEL
MODE
GND
V
DD
Figure 29. Block Diagram
DIGITAL INTERFACING OPERATION
The AD5222 contains a push-button controllable interface. The
active inputs are clock (CLK),
CS
and up/down (U/
D
). While
the MODE, and DACSEL pins control common updates or
individual updates. The negative-edge sensitive CLK input
requires clean transitions to avoid clocking multiple pulses into
the internal UP/DOWN counter register, Figure 30. Standard
logic families work well. If mechanical switches are used for
product evaluation a flip-flop or other suitable means should
debounce them. When
CS
is taken active low, the clock begins
to increment or decrement the internal up/down counter, depen-
dent upon the state of the U/
D
control pin. The UP/DOWN
counter value (D) starts at 40
H
at system power ON. Each new
CLK pulse will increment the value of the internal counter by
1 LSB until the full-scale value of 7F
H
is reached, as long as the
U/
D
pin is logic high. If the U/
D
pin is taken to logic low, the
counter will count down, stopping at code 00
H
(zero-scale).
Additional clock pulses on the CLK pin are ignored when the
wiper is at either the 00
H
position or the 7F
H
position. The
detailed digital logic interface circuitry is shown in Figure 30.
RDAC 1
U/
D
COUNTER
RDAC 2
U/
D
COUNTER
CLK
CS
U/
D
DACSEL
MODE
Figure 30. Detailed Digital Logic Interface Circuit
All digital inputs (
CS
, U/
D
, CLK, MODE, DACSEL) are
protected with a series input resistor and parallel Zener ESD
structure shown in Figure 31. All potentiometer terminal pins
(A, B, W) are protected from ESD as shown in Figure 32.
LOGIC
1k
V
V
SS
Figure 31. Equivalent ESD Protection Digital Pins
20
V
A, B, W
V
SS
Figure 32. Equivalent ESD Protection Analog Pins
D0
D1
D2
D3
D4
D5
D6
RDAC
UP/DOWN
CNTR
&
DECODE
W
B
R
S
= R
NOMINAL
/128
R
S
R
S
R
S
A
R
S
Figure 33. AD5222 Equivalent RDAC Circuit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD5222 | Increment/Decrement Dual Digital Potentiometer |
| AD5222BR10 | Increment/Decrement Dual Digital Potentiometer |
| AD5222BR100 | Increment/Decrement Dual Digital Potentiometer |
| AD5222BR50 | Increment/Decrement Dual Digital Potentiometer |
| AD5222BRU10 | Increment/Decrement Dual Digital Potentiometer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD5222BRU50-REEL7 | 制造商:Analog Devices 功能描述:Digital Potentiometer 128POS 50KOhm Dual 14-Pin TSSOP T/R 制造商:Rochester Electronics LLC 功能描述:7-BIT RDAC WITH UP/DWN CONTROL - Tape and Reel |
| AD5222BRUZ10 | 功能描述:IC POT DGTL DUAL 128POS 14TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標準包裝:3,300 系列:WiperLock™ 接片:257 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標準值 150 ppm/°C 存儲器類型:易失 接口:3 線 SPI（芯片選擇） 電源電壓:1.8 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-VDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-DFN-EP（3x3） 包裝:帶卷 (TR) |
| AD5222BRUZ100 | 功能描述:IC POT DGTL DUAL 128POS 14TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標準包裝:2,500 系列:XDCP™ 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標準值 ±300 ppm/°C 存儲器類型:非易失 接口:I²C（設(shè)備位址） 電源電壓:2.7 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) |
| AD5222BRUZ10-REEL7 | 功能描述:IC POT DGTL DUAL 128POS 14TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標準包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數(shù):1 溫度系數(shù):標準值 300 ppm/°C 存儲器類型: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) |
| AD5222BRUZ1M | 功能描述:IC POT DGTL DUAL 128POS 14TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標準包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數(shù):1 溫度系數(shù):標準值 300 ppm/°C 存儲器類型: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) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。