参数资料
型号: AD5274BCPZ-20-RL7
厂商: Analog Devices Inc
文件页数: 1/28页
文件大小: 0K
描述: IC RHEOSTAT 5V 50-TP 256 10MSOP
标准包装: 1
接片: 256
电阻(欧姆): 20k
电路数: 1
温度系数: 标准值 5 ppm/°C
存储器类型: 非易失
接口: I²C
电源电压: 2.7 V ~ 5.5 V,±2.5 V ~ 2.75 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
供应商设备封装: 10-MSOP
包装: 标准包装
其它名称: AD5274BCPZ-20-RL7DKR
1024-/256-Position, 1% Resistor Tolerance Error,
I2C Interface and 50-TP Memory Digital Rheostat
Data Sheet
Rev. D
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
I2C-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
A
W
AD5272/AD5274
SCL
ADDR
SDA
I2C
SERIAL
INTERFACE
POWER-ON
RESET
RDAC
REGISTER
50-TP
MEMORY
BLOCK
RESET
VSS
EXT_CAP
GND
08
07
6-
00
1
Figure 1.
GENERAL DESCRIPTION
The AD5272/AD52741 are single-channel, 1024-/256-position
digital rheostats that combine industry leading variable resistor
performance with nonvolatile memory (NVM) in a compact
package.
The AD5272/AD5274 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 AD5272/AD5274 device wiper settings are controllable
through the I2C-compatible digital interface. Unlimited
adjustments are allowed before programming the resistance
value into the 50-TP memory. The AD5272/AD5274 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
wiper position (analogous to placing epoxy on a mechanical
trimmer).
The AD5272/AD5274 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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