AD8403ARZ10

AD8403 provide a quad channel, 256-position, digitally controlled variable resistor (VR) device. It performs the same electronic adjustment function as a mechanical potentiometer or variable resistor. Each part contains a fixed resistor with a wiper contact that taps fixed resistor value at a point determined by digital code loaded into controlling serial input register. Resistance between wiper and either endpoint of the fixed resistor varies linearly with respect to digital code transferred into VR latch. Each variable resistor offers a completely programmable value of resistance between A terminal and wiper or the B terminal and the wiper. A unique switching circuit minimizes high glitch inherent in traditional switched resistor designs, avoiding any make-before-break or break-before-make operation. Applications include mechanical potentiometer replacement, programmable filters, delays, time constants, volume control, panning, line impedance matching and power supply adjustment.

• Contains four independent variable resistors
• End-to-end resistance RAB is 10Kohm
• Power shutdown, less than 5μA
• 3-wire, SPI-compatible serial data input
• 10MHz update data loading rate
• 2.7V to 5.5V single-supply operation, 600KHz bandwidth −3 dB
• 8bit resolution (VDD=3V ± 10% or 5V ± 10%, VA=VDD, VB=0V, −40°C ≤ TA ≤ +125°C)
• Integral nonlinearity of ±1/2LSB typ (VDD=3V ± 10% or 5V ± 10%, VA=VDD, VB=0V, −40°C ≤ TA ≤ +125°C)
• Typical differential nonlinearity of ±1/4LSB ( VDD = 5V, VA = VDD, VB = 0V, −40°C ≤ TA ≤ +125°C)
• 24-lead SOIC-W package, −40 to +125°C temperature range

บันทึก

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