Hot-selling and scarce AD5207BRUZ10 2-Channel, 256-Position Digital Potentiometer TSSOP14 spot stock

Product Descriptions

The AD5207 provides dual channel, 256-position, digitallycontrolled variable resistor (VR) devices that perform the sameelectronic adjustment function as a potentiometer or variableresistor . Each channel of the AD5207 contains a fixed resistor witha wiper contact that taps the fixed resistor value at a pointdetermined by a digital code loaded into the SPI-compatibleserial-input register . The resistance between the wiper and eitherend point of the fixed resistor varies linearly with respect to thedigital code transferred into the VR latch . The variable resistoroffers a completely programmable value of resistance, betweenthe A Terminal and the wiper or the B Terminal and the wiper .The fixed A-to-B terminal resistance of 10 kΩ, 50 kΩ or 100 kΩhas a ±1% channel-to-channel matching tolerance with a nominal temperature coefficient of 500 ppm/°C . A unique switchingcircuit minimizes the high glitch inherent in traditional switchedresistor designs and avoids any make-before-break or breakbefore-make operation .

Each VR has its own VR latch, which holds its programmedresistance value . These VR latches are updated from an internalserial-to-parallel shift register, which is loaded from a standard3-wire serial-input digital interface . Ten bits, to make up thedata word, are required and clocked into the serial input register .

The first two bits are address bits . The following eight bits arethe data bits that represent the 256 steps of the resistance value .The reason for two address bits instead of one is to be compatiblewith similar products such as AD8402 so that drop-in replacementis possible . The address bit determines the corresponding VRlatch to be loaded with the data bits during the returned positiveedge of CS strobe . A serial data output pin at the opposite endof the serial register allows simple daisy chaining in multipleVR applications without additional external decoding logic .

Product Features

256-Position, 2-Channel

Potentiometer Replacement

10 k, 50 k, 100 k

Power Shut-Down, Less than 5 A

2.7 V to 5.5 V Single Supply

2.7 V Dual Supply

3-Wire SPI-Compatible Serial Data Input

Midscale Preset During Power-On

Product Applications

Mechanical Potentiometer Replacement

Stereo Channel Audio Level Control

Instrumentation: Gain, Offset Adjustment

Programmable Voltage-to-Current Conversion

Programmable Filters, Delays, Time Constants

Line Impedance Matching

Automotive Electronics Adjustment

Product Specification

Product Photos

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