AD5248 Series

256-Position Dual Channel I2C Compatible Digital Resistor

Catalog

256-Position Dual Channel I2C Compatible Digital Resistor

Part	Operating Temperature [Max]	Operating Temperature [Min]	Memory Type	Supplier Device Package	Package / Case	Package / Case [x]	Package / Case [x]	Tolerance [Max]	Tolerance [Min]	Number of Taps	Configuration	Voltage - Supply [Min]	Voltage - Supply [Max]	Mounting Type	Number of Circuits	Features	Resistance (Ohms)	Interface	Taper	Temperature Coefficient (Typ)	Resistance - Wiper (Ohms) (Typ)	Supplied Contents	Contents	Function	Type	Utilized IC / Part	Resistance (Ohms)
Analog Devices AD5248BRMZ2.5	125 °C	-40 °C	Volatile	10-MSOP	10-MSOP 10-TFSOP	3 mm	0.118 in	55 %	-20 %	256	Rheostat	2.7 V	5.5 V	Surface Mount	2	Selectable Address	2.5 kOhms	I2C	Linear	35 ppm/°C	160 Ohms
Analog Devices AD5248BRMZ100	125 °C	-40 °C	Volatile	10-MSOP	10-MSOP 10-TFSOP	3 mm	0.118 in	55 %	-20 %	256	Rheostat	2.7 V	5.5 V	Surface Mount	2	Selectable Address	100 kOhms	I2C	Linear	35 ppm/°C	160 Ohms
Analog Devices AD5248EVAL																						Board(s)	Board(s)	Digital Potentiometer	Data Acquisition	AD5248
Analog Devices AD5248BRMZ50-RL7	125 °C	-40 °C	Volatile	10-MSOP	10-MSOP 10-TFSOP	3 mm	0.118 in	55 %	-20 %	256	Rheostat	2.7 V	5.5 V	Surface Mount	2	Selectable Address	50 kOhms	I2C	Linear	35 ppm/°C	160 Ohms
Analog Devices AD5248BRMZ10	125 °C	-40 °C	Volatile	10-MSOP	10-MSOP 10-TFSOP	3 mm	0.118 in	55 %	-20 %	256	Rheostat	2.7 V	5.5 V	Surface Mount	2	Selectable Address		I2C	Linear	35 ppm/°C	160 Ohms						10k

Catalog

256-Position Dual Channel I2C Compatible Digital Resistor

Key Features

• 2-channel, 256-position potentiometers

• End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ

• Compact 10-lead MSOP (3 mm × 4.9 mm) package

• Fast settling time: tS= 5 µs typical on power-up

• Full read/write of wiper register

• Power-on preset to midscale

• Extra package address decode pins:AD0 and AD1

• Computer software replaces microcontroller in factory programming applications

• Single supply: 2.7 V to 5.5 V

• Low temperature coefficient: 35 ppm/°C

• Low power: IDD= 6 µA maximum

• Wide operating temperature: −40°C to +125°C

• Evaluation board available

Description

TheAD5243and AD5248 provide a compact 3 mm × 4.9 mm packaged solution for dual, 256-position adjustment applications. The AD5243 performs the same electronic adjustment function as a 3-terminal mechanical potentiometer, and the AD5248 performs the same adjustment function as a 2-terminal variable resistor. Available in four end-to-end resistance values (2.5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ), these low temperature coefficient devices are ideal for high accuracy and stability-variable resistance adjustments. The wiper settings are controllable through the I2C-compatible digital interface. The AD5248 has extra package address decode pins, AD0 and AD1, allowing multiple parts to share the same I2C, 2-wire bus on a PCB. The resistance between the wiper and either endpoint of the fixed resistor varies linearly with respect to the digital code transferred into the RDAC latch. (The terms digital potentiometer, VR, and RDAC are used interchangeably.)Operating from a 2.7 V to 5.5 V power supply and consuming less than 6 µA allows the AD5243/AD5248 to be used in portable battery-operated applications.For applications that program the AD5243/AD5248 at the factory, Analog Devices, Inc., offers device programming software running on Windows®NT/2000/XP operating systems. This software effectively replaces the need for external I2C controllers, which in turn enhances the time to market of systems. An AD5243/AD5248 evaluation kit and software are available. The kit includes a cable and instruction manual.ApplicationsSystems calibrationsElectronics level settingsMechanical trimmers replacement in new designsPermanent factory printed circuit board (PCB) settingTransducer adjustment of pressure, temperature, position, chemical, and optical sensorsRF amplifier biasingGain control and offset adjustment