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參數資料
| 型號： | EVAL-AD5270SDZ |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 1/24頁 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD5270 |
| 標準包裝： | 1 |
| 主要目的： | 數字電位器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | AD5270 |
| 主要屬性： | 1 通道，1024 位置 |
| 次要屬性： | 2.7 ~ 5.5 V，5 ppm/°C，SPI 接口 |
| 已供物品： | 電路板，CD，器件，穩壓器 |
1024-/256-Position, 1% Resistor Tolerance Error,
SPI Interface and 50-TP Memory Digital Rheostat
Data Sheet
Rev. F
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
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
2009–2013 Analog Devices, Inc. All rights reserved.
FEATURES
Single-channel, 1024-/256-position resolution
20 kΩ, 50 kΩ, 100 kΩ nominal resistance
Maximum ±1% nominal resistor tolerance error
50-times programmable (50-TP) wiper memory
Rheostat mode temperature coefficient: 5 ppm/°C
2.7 V to 5.5 V single-supply operation
±2.5 V to ±2.75 V dual-supply operation for ac or bipolar
operations
SPI-compatible interface
Wiper setting readback
Power on refreshed from 50-TP memory
Thin LFCSP, 10-lead, 3 mm × 3 mm × 0.8 mm package
Compact MSOP, 10-lead, 3 mm × 4.9 mm × 1.1 mm package
APPLICATIONS
Mechanical rheostat replacements
Op-amp: variable gain control
Instrumentation: gain, offset adjustment
Programmable voltage to current conversions
Programmable filters, delays, time constants
Programmable power supply
Sensor calibration
FUNCTIONAL BLOCK DIAGRAM
10/8
VDD
VSS
EXT_CAP
GND
A
W
AD5270/AD5271
SCLK
DIN
SDO
SERIAL
INTERFACE
POWER-ON
RESET
RDAC
REGISTER
50-TP
MEMORY
BLOCK
SYNC
08
07
7
-00
1
Figure 1.
GENERAL DESCRIPTION
The AD5270/AD52711 are single-channel, 1024-/256-position
digital rheostats that combine industry leading variable resistor
performance with nonvolatile memory (NVM) in a compact
package.
The AD5270/AD5271 ensure less than 1% end-to-end resistor
tolerance error and offer 50-times programmable (50-TP) memory.
The guaranteed industry leading low resistor tolerance error
feature simplifies open-loop applications as well as precision
calibration and tolerance matching applications.
The AD5270/AD5271 device wiper settings are controllable
through the SPI digital interface. Unlimited adjustments are
allowed before programming the resistance value into the
50-TP memory. The AD5270/AD5271 do not require any
external voltage supply to facilitate fuse blow and there are
50 opportunities for permanent programming. During 50-TP
activation, a permanent blow fuse command freezes the resistance
position (analogous to placing epoxy on a mechanical trimmer).
The AD5270/AD5271 are available in a 3 mm × 3 mm, 10-lead
LFCSP package and in a 10-lead MSOP package. The parts are
guaranteed to operate over the extended industrial temperature
range of 40°C to +125°C.
1 Protected by U.S.Patent Number 7688240
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