參數(shù)資料
型號： AD5231BRU10-REEL7
廠商： Analog Devices Inc
文件頁數(shù)： 1/28頁
文件大?。?/td> 0K
描述： IC DGTL POT 1024POS 16-TSSOP TR
標(biāo)準(zhǔn)包裝： 1,000
接片： 1024
電阻（歐姆）： 10k
電路數(shù)： 1
溫度系數(shù)： 標(biāo)準(zhǔn)值 600 ppm/°C
存儲器類型： 非易失
接口： 4 線 SPI（芯片選擇）
電源電壓： 2.7 V ~ 5.5 V，±2.25 V ~ 2.75 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 16-TSSOP（0.173"，4.40mm 寬）
供應(yīng)商設(shè)備封裝： 16-TSSOP
包裝： 帶卷 (TR)
Nonvolatile Memory,
1024-Position Digital Potentiometer
Data Sheet
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
2001–2013 Analog Devices, Inc. All rights reserved.
FEATURES
1024-position resolution
Nonvolatile memory maintains wiper setting
Power-on refresh with EEMEM setting
EEMEM restore time: 140 s typ
Full monotonic operation
10 k, 50 k, and 100 k terminal resistance
Permanent memory write protection
Wiper setting readback
Predefined linear increment/decrement instructions
Predefined ±6 dB/step log taper increment/decrement
instructions
SPI-compatible serial interface
3 V to 5 V single-supply or ±2.5 V dual-supply operation
28 bytes extra nonvolatile memory for user-defined data
100-year typical data retention, TA = 55°C
APPLICATIONS
Mechanical potentiometer replacement
Instrumentation: gain, offset adjustment
Programmable voltage to current conversion
Programmable filters, delays, time constants
Programmable power supply
Low resolution DAC replacement
Sensor calibration
FUNCTIONAL BLOCK DIAGRAM
EEMEM(0)
EEMEM(1)
AD5231
RDAC
CLK
SDI
GND
SDO
RDY
SDO
VDD
VSS
A
W
B
O1
O2
SDI
2
PR
WP
CS
ADDR
DECODE
RDAC
REGISTER
DIGITAL
REGISTER
SERIAL
INTERFACE
EEMEM
CONTROL
28 BYTES
USER EEMEM
DIGITAL
OUTOUT
BUFFER
02739-
001
Figure 1.
CODE (Decimal)
100
75
0
1023
256
R
WA
(D
),
R
WB
(D)
;(
%
o
fNo
mi
n
al
R
AB
)
512
768
50
25
RWB
RWA
02739-
002
Figure 2. RWA (D) and RWB (D) vs. Decimal Code
GENERAL DESCRIPTION
The AD5231 is a nonvolatile memory1, digitally controlled
potentiometer2 with 1024-step resolution. The device performs
the same electronic adjustment function as a mechanical
potentiometer with enhanced resolution, solid state reliability,
and remote controllability. The AD5231 has versatile programming
that uses a standard 3-wire serial interface for 16 modes of
operation and adjustment, including scratchpad programming,
memory storing and restoring, increment/decrement, ±6 dB/step
log taper adjustment, wiper setting readback, and extra EEMEM
for user-defined information, such as memory data for other
components, look-up table, or system identification information.
In scratchpad programming mode, a specific setting can be
programmed directly to the RDAC register that sets the
resistance between Terminals W–A and Terminals W–B. This
setting can be stored into the EEMEM and is transferred
automatically to the RDAC register during system power-on.
The EEMEM content can be restored dynamically or through
external PR strobing, and a WP function protects EEMEM
contents. To simplify the programming, the linear-step increment
or decrement commands can be used to move the RDAC wiper
up or down, one step at a time. The ±6 dB step commands can
be used to double or half the RDAC wiper setting.
The AD5231 is available in a 16-lead TSSOP. The part is
guaranteed to operate over the extended industrial temperature
range of 40°C to +85°C.
1
The terms nonvolatile memory and EEMEM are used interchangeably.
2
The terms digital potentiometer and RDAC are used interchangeably.
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