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 | |
DYNAMIC CHARACTERISTICS Bandwidth –3 dB | BW | |
