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AD5254B1 Nonvolatile Memory Digital Potentiometers
FEATURES
AD5253: Quad 64-position resolution
AD5254: Quad 256-position resolution
1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ Nonvolatile memory 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 IC® compatible serial interface Direct read/write accesses of RDAC 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 kΩ 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, TA= 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
The AD5253/AD5254 are quad channel,2C, nonvolatile memory, digitally controlled potentiometers with 64/256 positions, respectively. These devices perform the same electronic adjustment functions as mechanical potentiometers, trimmers, and variable resistors.
The AD5253/AD5254’s versatile programmability allows multiple 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 information, such as memory data for other components, look-up table,or system identification information.
Parameter
Symbol
Conditions
Input Leakage Current (Other
than WP and A0)
IA0
VIN= 0 V or VDD
POWER SUPPLIES
Single-Supply Power Range
VDD
VSS= 0 V
DYNAMIC CHARACTERISTICS
Bandwidth –3 dB
BW
RAB= 1 kΩ
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Distributor/Wholesaler,Trading Company
Year Established:
2004
Total Annual:
500000-1000000
Employee Number:
20~30
Ecer Certification：
Site Member
King--- Originator of ANTERWELL, engaged in the IC electronics industry in 1998 and establish ANTERWELL in 2004. The company is located in Shenzhen Huaqiang North, the largest electronic center in Asia. Our main business is the technical development and ... King--- Originator of ANTERWELL, engaged in the IC electronics industry in 1998 and establish ANTERWELL in 2004. The company is located in Shenzhen Huaqiang North, the largest electronic center in Asia. Our main business is the technical development and ...
