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參數(shù)資料
| 型號： | AD5252BRU10-RL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數(shù)字電位計 |
| 英文描述： | 32-Tap. Nonvolatile. Linear-Taper Digital Potentiometers in SOT23 |
| 中文描述： | DUAL 10K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO14 |
| 封裝： | MO-153AB-1, TSSOP-14 |
| 文件頁數(shù)： | 24/28頁 |
| 文件大?。?/td> | 859K |
| 代理商： | AD5252BRU10-RL7 |
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AD5251/AD5252
APPLICATIONS
LCD PANEL V
COM
ADJUSTMENT
Large LCD panels usually require an adjustable V
COM
voltage
centered around 6 V to 8 V with ±1 V swing and small steps
adjustment. This example represents common DAC appli-
cations where the window of adjustments is small and centered
at any level. High voltage and high resolution DACs can be used
but it is far more cost-effective to use low voltage digital
potentiometers with level shifting, such as the AD5251 or
AD5252, to achieve the objective.
Rev. 0 | Page 24 of 28
U1
V
1
R
SENSE
RDAC1
10k
RDAC3
10k
B
B
AD5252
AD8628
V–
U2
V
O
VREF
+5V
V+
0
V
2
Assume a V
COM
voltage requirement of 6 V ±1 V with a ±20 mV
step adjustment, as shown in Figure 44. The AD5252 can be
configured in voltage divider mode with an op amp gain. With
±20% tolerance accounted for by the AD5252, this circuit can
still be adjusted from 5 V to 7 V with an 8 mV/step in the
worst case.
Figure 45. Current-Sensing Amplifier.
ADJUSTABLE HIGH POWER LED DRIVER
Figure 46 shows a circuit that can drive three to four high power
LEDs. The ADP1610 is an adjustable boost regulator that
provides adequate headroom and current for the LEDs. Because
its FB pin voltage is 1.2 V, the digital potentiometer AD5252
and the op amp form an average gain of 12 feedback networks
that servo the sensing and feedback voltages. As a result, the
voltage across R
SET
is regulated around 0.1 V, depending on the
AD5252’s setting. An adjustable LED current is
V
DD
U1
U2
V
COM
+5V
R2
10k
R4
6k
R3
18.5k
R5
1k
R1
350k
C1
2.2p
B
AD5252
+14.4V
+14.4V
±
20%
±
1%
6V
±
1V
V+
V–
0
SET
R
LED
R
V
I
SET
=
(9)
R
SET
should be small to conserve power but large enough to
limit the maximum LED current. R3 should also be used in
parallel with the AD5252 to limit the LED current within an
achievable range.
Figure 44. Apply 5 V Digital Potentiometer AD5251 in a 6 V ±1 V Application.
/SD
SW
FB
COMP
SS
RT
GND
IN
PWM
C
C
390pF
C
10nF
R
O
100k
R
SET
0.25k
10k
W
B
A
C8
0.1
μ
F
AD5252
ADP1610
V
OUT
AD8591
V–
U3
U1
U2
U1
+5V
+5V
0
R3
200
R2
1.1k
R1
100
R4
13.5k
C3
10
μ
F
C2
10
μ
F
D1
D1
D2
D3
L1
10
μ
F
CURRENT-SENSING AMPLIFIER
The dual channel, synchronous update, and channel-to-channel
resistance matching characteristics make the AD5251/AD5252
suitable for current sensing applications, such as LED
brightness control. In the circuit shown in Figure 45, when
RDAC1 and RDAC3 are programmed to the same settings, it
can be shown that
(
)
REF
N
o
V
V
V
D
D
V
+
=
1
2
2
(8)
As a result, the current through a sense resistor connected
between V
1
and V
2
can be known. The programmability of this
circuit makes it adaptable to systems that require different sen-
sitivities. If the op amp has very low offset and low bias current,
the major source of error comes from the digital potentiometer
channel-to-channel resistance mismatch, which is typically
0.15%. The circuit accuracy is about 9 bits, which is adequate
for LED control and other general purpose applications.
Figure 46. High Power Adjustable LED Driver
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PDF描述 |
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| AD5252BRU100 | 32-Tap. Nonvolatile. Linear-Taper Digital Potentiometers in SOT23 |
| AD5252BRU100-RL7 | 32-Tap. Nonvolatile. Linear-Taper Digital Potentiometers in SOT23 |
| AD5252BRU50-RL7 | 32-Tap. Nonvolatile. Linear-Taper Digital Potentiometers in SOT23 |
| AD5251BRU1-RL7 | Memory Card Socket; No. of Contacts:50; Leaded Process Compatible:Yes; Mounting Type:Surface Mount; Peak Reflow Compatible (260 C):Yes; Gender:Male; No. of Rows:1; Width:31.60mm RoHS Compliant: Yes |
| AD5251EVAL | Memory Card Socket; No. of Contacts:50; Leaded Process Compatible:Yes; Mounting Type:Surface Mount; Peak Reflow Compatible (260 C):Yes; Gender:Male; No. of Rows:1; Width:31.60mm RoHS Compliant: Yes |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD5252BRU1-RL7 | 功能描述:IC DCP DUAL 1K 256POS 14TSSOP TR 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) |
| AD5252BRU50 | 功能描述:IC DCP DUAL 50K 256POS 14TSSOP 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) |
| AD5252BRU50-RL7 | 功能描述:IC DCP DUAL 50K 256POS 14TSSOP 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) |
| AD5252BRUZ1 | 功能描述:IC DGTL POT DUAL 1K I2C 14-TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 35 ppm/°C 存儲器類型:非易失 接口:3 線串口 電源電壓:2.7 V ~ 5.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN-EP（3x3） 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:1399 (CN2011-ZH PDF) 其它名稱:MAX5423ETA+TCT |
| AD5252BRUZ10 | 功能描述:IC DIG POT DUAL 256 10K 14TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 35 ppm/°C 存儲器類型:非易失 接口:3 線串口 電源電壓:2.7 V ~ 5.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN-EP（3x3） 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:1399 (CN2011-ZH PDF) 其它名稱:MAX5423ETA+TCT |
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