參數(shù)資料
型號(hào)： EVAL-AD5259DBZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 1/24頁(yè)
文件大?。?/td> 0K
描述： BOARD EVAL FOR AD5259DBZ
標(biāo)準(zhǔn)包裝： 1
系列： *
Nonvolatile, I2C-Compatible
256-Position, Digital Potentiometer
Data Sheet
Rev. C
InformationfurnishedbyAnalogDevicesisbelievedtobeaccurateandreliable.However,no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
licenseisgrantedbyimplicationorotherwiseunderanypatentorpatentrightsofAnalogDevices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
2005–2012 Analog Devices, Inc. All rights reserved.
FEATURES
Nonvolatile memory maintains wiper settings
256-position
Thin LFCSP-10 (3 mm x 3 mm x 0.8 mm) package
Compact MSOP-10 (3 mm × 4.9 mm × 1.1mm) package
I2C-compatible interface
V
LOGIC pin provides increased interface flexibility
End-to-end resistance 5 k, 10 k, 50 k, 100 k
Resistance tolerance stored in EEPROM (0.1% accuracy)
Power-on EEPROM refresh time < 1ms
Software write protect command
Address Decode Pin AD0 and Pin AD1 allow
4 packages per bus
100-year typical data retention at 55°C
Wide operating temperature
40°C to +125°C
3 V to 5 V single supply
APPLICATIONS
LCD panel V
COM adjustment
LCD panel brightness and contrast control
Mechanical potentiometer replacement in new designs
Programmable power supplies
RF amplifier biasing
Automotive electronics adjustment
Gain control and offset adjustment
Fiber to the home systems
Electronics level settings
GENERAL DESCRIPTION
The AD5259 provides a compact, nonvolatile LFCSP-10
(3 mm × 3 mm) or MSOP-10 (3 mm × 4.9 mm) packaged
solution for 256-position adjustment applications. These
devices perform the same electronic adjustment function
as mechanical potentiometers1 or variable resistors, but
with enhanced resolution and solid-state reliability.
The wiper settings are controllable through an I2C-compatible
digital interface that is also used to read back the wiper register
and EEPROM content. Resistor tolerance is also stored within
EEPROM, providing an end-to-end tolerance accuracy of 0.1%.
A separate VLOGICpin delivers increased interface flexibility. For
users who need multiple parts on one bus, Address Bit AD0 and
Address Bit AD1 allow up to four devices on the same bus.
FUNCTIONAL BLOCK DIAGRAMS
05026-001
RDAC
REGISTER
RDAC
DATA
CONTROL
COMMAND
DECODE LOGIC
ADDRESS
DECODE LOGIC
CONTROL LOGIC
AD5259
I2C
SERIAL
INTERFACE
POWER-
ON RESET
A
W
B
SCL
SDA
AD0
AD1
VDD
VLOGIC
GND
RDAC
EEPROM
8
Figure 1. Block Diagram
05026-003
COMMAND
DECODE LOGIC
ADDRESS
DECODE LOGIC
CONTROL
LOGIC
SCL
SDA
AD0
AD1
GND
EEPROM
I2C
SERIAL
INTERFACE
RDAC
REGISTER
AND
LEVEL
SHIFTER
A
W
B
VLOGIC
VDD
Figure 2. Block Diagram Showing Level Shifters
CONNECTION DIAGRAM
05026-002
AD5259
TOP VIEW
(Not to Scale)
W
1
AD0
2
AD1
3
SDA
4
SCL
5
A
B
VDD
GND
VLOGIC
10
9
8
7
6
Figure 3. Pinout
1 The terms digital potentiometer, VR (variable resistor), and RDAC are used
interchangeably.
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