256- (AD5200) and 33-Position (AD5201) Digital Potentiometers

Circuit Applications:

The AD5200 and AD5201 are programmable resistor devices, with 256 positions and 33 positions respectively, that can be digitally controlled through a 3-wire SPI serial interface. The terms programmable resistor, variable resistor (VR), and RDAC are commonly used interchangeably to refer to digital potentiometers. These devices perform the same electronic adjustment function as a potentiometer or variable resistor. Both AD5200/AD5201 contain a single variable resistor in the compact MSOP package. Each device contains a fixed wiper resistance at the wiper contact that taps the programmable resistance at a point determined by a digital code. The code is loaded in the serial input register. The resistance between the wiper and either end point of the programmable resistor varies linearly with respect to the digital code transferred into the VR latch. Each variable resistor offers a completely programmable value of resistance, between the A terminal and the wiper, or the B terminal and the wiper. The fixed A-to-B terminal resistance of 10 kΩ or 50 kΩ has a nominal temperature coefficient of 500 ppm/°C. The VR has a VR latch that holds its programmed resistance value. The VR latch is updated from an SPI-compatible serial-to-parallel shift register that is loaded from a standard 3-wire serial-input digital interface. Eight data bits for the AD5200 and six data bits for the AD5201 make up the data word that is clocked into the serial input register. The internal preset forces the wiper to the midscale position by loading 80H and 10H into AD5200 and AD5201 VR latches respectively. The SHDN pin forces the resistor to an end-to-end open-circuit condition on the A terminal and shorts the wiper to the B terminal, achieving a microwatt power shutdown state. When SHDN is returned to logic high, the previous latch setting puts the wiper in the same resistance setting prior to shutdown. The digital interface is still active during shutdown so that code changes can be made that will produce a new wiper position when the device is returned from shutdown.

All parts are guaranteed to operate over the extended industrial temperature range of –40°C to +85°C.

Features and Benefits
  • 10K, 50K Ohm End-to-End Terminal Resistance
  • 33 Position AD5201 Wiper Connects Directly to Both End Terminals
  • 3-Wire SPI Compatible Serial Data Input
  • +2.7 V to +5.5 V Single-Supply; ±2.7 V Dual-Supply Operation, Ideal for Ground
  • Referenced AC Signals
  • Power ON Mid-Scale Preset
  • Fully Characterized (Rheostat, and Potentiometer-Divider Mode DNL, THD, Noise, Bandwidth), No surprises!
  • Compact micro-SOIC package <1.1 mm height, ideal for PCMCIA cards
Digital to Analog Converters
Data Sheets
Documentnote
AD5200/AD5201: 256-Position and 33-Position Digital Potentiometers Data Sheet (Rev. D)PDF 749 kB
Application Notes
Documentnote
AN-1291: Digital Potentiometers: Frequently Asked Questions (Rev. A)PDF 805 kB
AN-686: Implementing an I2C® Reset (Rev. 0)PDF 44 kB
AN-582: Resolution Enhancements of Digital Potentiometers with Multiple DevicesPDF 135 kB
AN-580: Programmable Oscillator Uses Digital Potentiometers (Rev. 0)PDF 52 kB
Frequently Asked Questions
Documentnote
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD5200BRMZ10 Production10 ld MSOPOTH 50-40 to 85C1.221.09Y
AD5200BRMZ10-REEL7 Production10 ld MSOPREEL 1000-40 to 85C01.09Y
AD5200BRMZ50 Production10 ld MSOPOTH 50-40 to 85C1.221.09Y
AD5200BRMZ50-REEL7 Production10 ld MSOPREEL 1000-40 to 85C01.09Y
Reference Materials
AD5200/AD5201: 256-Position and 33-Position Digital Potentiometers Data Sheet (Rev. D) ad5200
AN-1291:数字电位计:常见问题解答 (Rev. A) ad8402
AN-1291: Digital Potentiometers: Frequently Asked Questions (Rev. A) ad8402
AN-686: 实现I²C®复位 (Rev. 0) adg729
AN-686: Implementing an I2C® Reset (Rev. 0) ad7993
AN-582: 采用多个器件增强数字电位计分辨率 (Rev. A) ad8402
AN-582: Resolution Enhancements of Digital Potentiometers with Multiple Devices ad8402
AN-580: Programmable Oscillator Uses Digital Potentiometers (Rev. 0) ad8402
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