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參數資料
| 型號： | AD5254BRU10 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數字電位計 |
| 英文描述： | Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers |
| 中文描述： | QUAD 10K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO20 |
| 封裝： | MO-153AC, TSSOP-20 |
| 文件頁數： | 1/28頁 |
| 文件大?。?/td> | 834K |
| 代理商： | AD5254BRU10 |
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Quad 64-/256-Position I
2
C Nonvolatile
Memory Digital Potentiometers
AD5253/AD5254
FEATURES
AD5253: Quad 64-position resolution
AD5254: Quad 256-position resolution
Nonvolatile memory1
stores wiper settings with write
protection
Power-on refreshed to EEMEM settings in 300 μs typ
EEMEM rewrite time = 540 μs typ
Resistance tolerance stored in nonvolatile memory
12 extra bytes in EEMEM for user-defined information
I
2
C compatible serial interface
Direct read/write accesses of RDAC
2
and EEMEM registers
Predefined linear increment/decrement commands
Predefined ±6 dB step change commands
Synchronous or asynchronous quad channel update
Wiper setting readback
4 MHz bandwidth—1 k version
Single supply 2.7 V to 5.5 V
Dual supply ±2.25 V to ±2.75 V
2 slave address decoding bits allow operation of 4 devices
100-year typical data retention, T
A
= 55°C
Operating temperature: –40°C to +85°C
APPLICATIONS
Mechanical potentiometer replacement
Low resolution DAC replacement
RGB LED backlight control
White LED brightness adjustment
RF base station power amp bias control
Programmable gain and offset control
Programmable attenuators
Programmable voltage-to-current conversion
Programmable power supply
Programmable filters
Sensor calibrations
GENERAL DESCRIPTION
Rev.
0
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
2004 Analog Devices, Inc. All rights reserved.
www.analog.com
The AD5253/AD5254 are quad channel, I
2
C, nonvolatile mem-
ory, digitally controlled potentiometers with 64/256 positions,
respectively. These devices perform the same electronic adjust-
ment functions as mechanical potentiometers, trimmers, and
variable resistors.
The AD5253/AD5254’s versatile programmability allows multi-
ple modes of operation, including read/write accesses in the
RDAC and EEMEM registers, increment/decrement of
resistance, resistance changes in ±6 dB scales, wiper setting
readback, and extra EEMEM for storing user-defined informa-
tion, such as memory data for other components, look-up table,
or system identification information.
FUNCTIONAL BLOCK DIAGRAM
RDAC0
REGIS-
TER
RDAC1
REGIS-
TER
RDAC2
REGIS-
TER
RDAC3
REGIS-
TER
RDAC0
RDAC1
RDAC2
RDAC3
DATA
CONTROL
COMMAND
DECODE LOGIC
ADDRESS
DECODE LOGIC
CONTROL LOGIC
AD5253/AD5254
I
2
C
SERIAL
INTERFACE
V
DD
V
SS
A0
W0
B0
A1
W1
B1
A2
W2
B2
A3
W3
B3
DGND
WP
SCL
SDA
AD0
AD1
0
EEMEM
POWER-ON
REFRESH
R
AB
TOL
RDAC EEMEM
Figure 1.
The AD5253/AD5254 allow the host I
2
C controllers to write any
of the 64-/256-step wiper settings in the RDAC registers and
store them in the EEMEM. Once the settings are stored, they are
restored automatically to the RDAC registers at system power-
on; the settings can also be restored dynamically.
The AD5253/AD5254 provide additional increment, decrement,
+6 dB step change, and –6 dB step change in synchronous or
asynchronous channel update modes. The increment and
decrement functions allow stepwise linear adjustments, while
±6 dB step changes are equivalent to doubling or halving the
RDAC wiper setting. These functions are useful for steep-slope
nonlinear adjustment applications such as white LED brightness
and audio volume control.
The AD5253/AD5254 have a patented resistance tolerance
storing function that allows the user to access the EEMEM and
obtain the absolute end-to-end resistance values of the RDACs
for precision applications.
The AD5253/AD5254 are available in TSSOP-20 packages in
1 k, 10 k, 50 k, and 100 k options. All parts are
guaranteed to operate over the –40°C to +85°C extended
industrial temperature range.
1
The terms nonvolatile memory and EEMEM are used interchangeably.
2
The terms digital potentiometer and RDAC are used interchangeably.
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| AD5254BRU100 | Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers |
| AD5254BRU100-RL7 | Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers |
| AD5254BRU50 | Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers |
| AD5254BRU50-RL7 | Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD5254BRU100 | 功能描述:IC DGTL POT QUAD 100K 20-TSSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 數字電位器 系列:- 標準包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數:1 溫度系數: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 供應商設備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
| AD5254BRU100-RL7 | 功能描述:IC DGTL POT QUAD 100K 20-TSSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 數字電位器 系列:- 標準包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數:1 溫度系數: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 供應商設備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
| AD5254BRU10-RL7 | 功能描述:IC DGTL POT QUAD 10K 20-TSSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 數字電位器 系列:- 標準包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數:1 溫度系數: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 供應商設備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
| AD5254BRU1-RL7 | 功能描述:IC DGTL POT QUAD 1K 20-TSSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 數字電位器 系列:- 標準包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數:1 溫度系數: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 供應商設備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
| AD5254BRU50 | 功能描述:IC DGTL POT QUAD 50K 20-TSSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 數字電位器 系列:- 標準包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數:1 溫度系數: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 供應商設備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
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