Overview
The AD5207BRU50, produced by Analog Devices Inc., is a dual-channel, 256-position digitally controlled variable resistor (VR) device. This component functions similarly to a mechanical potentiometer, offering programmable resistance values. Each channel of the AD5207 contains a fixed resistor with a wiper contact that taps the fixed resistor value at a point determined by a digital code loaded into the SPI-compatible serial input register. The device is available in a 1.1 mm thin TSSOP-14 package, making it suitable for various applications, including PCMCIA and other space-constrained designs. It operates over an extended industrial temperature range of -40°C to +125°C.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Number of Channels | 2 | - |
| Number of Taps | 256 | - |
| Resistance (Ohms) | 50k | Ω |
| Supply Voltage | 2.7V to 5.5V | V |
| Operating Temperature | -40°C to +125°C | °C |
| Temperature Coefficient | 500 ppm/°C | - |
| Package/Case | 14-TSSOP | - |
| Interface | SPI | - |
| Power Shutdown Current | < 5µA | A |
Key Features
- Dual-channel, 256-position digitally controlled variable resistor (VR) device.
- Programmable resistance values between the A terminal and the wiper or the B terminal and the wiper.
- Internal reset block forces the wiper to the midscale position during every power-up condition.
- Power shutdown mode with minimal leakage current and negligible power dissipation.
- SPI-compatible three-wire serial input control interface.
- Operating voltage range of 2.7V to 5.5V, with dual-supply operation possible.
- Extended industrial temperature range of -40°C to +125°C.
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).
Q & A
- What is the AD5207BRU50 used for?
The AD5207BRU50 is used as a dual-channel, 256-position digitally controlled variable resistor, replacing mechanical potentiometers in various applications.
- What are the resistance values available for the AD5207BRU50?
The AD5207BRU50 is available with a nominal resistance of 50 kΩ. Other versions of the AD5207 offer 10 kΩ and 100 kΩ resistances.
- What is the operating temperature range of the AD5207BRU50?
The operating temperature range is -40°C to +125°C.
- How does the power shutdown feature work on the AD5207BRU50?
When the SHDN pin is activated (logic low), terminals A on both RDACs are open-circuited, and the wiper terminals are shorted to B terminals, resulting in minimal leakage current and negligible power dissipation.
- What interface does the AD5207BRU50 use for control?
The AD5207BRU50 uses a SPI-compatible three-wire serial input control interface.
- Can the AD5207BRU50 be used in dual-supply configurations?
- What is the package type of the AD5207BRU50?
The AD5207BRU50 is available in a 14-TSSOP package.
- How many transistors are in the AD5207?
The AD5207 contains 474 transistors.
- Can the AD5207BRU50 update both channels simultaneously?
No, the AD5207BRU50 cannot update both channels simultaneously; two separate 10-bit data words must be clocked in to change both VR settings.
- What is the typical temperature coefficient of the AD5207BRU50?
The typical temperature coefficient is 500 ppm/°C.
