Overview
The AD5207BRU100-REEL7, produced by Analog Devices Inc., is a 2-channel, 256-position digital potentiometer. This device performs the same electronic adjustment function as a mechanical potentiometer or variable resistor. Each channel 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 AD5207 is available in a 1.1 mm thin TSSOP-14 package, suitable for PCMCIA applications, and operates over an extended industrial temperature range of -40°C to +125°C.
Key Specifications
| Parameter | Description |
|---|---|
| Number of Channels | 2 |
| Number of Positions | 256 |
| Resistor Values | 10 kΩ, 50 kΩ, 100 kΩ (specifically 100 kΩ for AD5207BRU100-REEL7) |
| Temperature Range | -40°C to +125°C |
| Power Supply | +2.7V to +5.5V (single supply), ±2.7V (dual supply) |
| Interface | 3-wire SPI-compatible serial input |
| Package Type | 14-TSSOP |
| Shutdown Current | Less than 5 μA |
| Power-On Reset | Midscale preset |
Key Features
- Dual-channel, 256-position digital potentiometer with SPI-compatible serial input interface.
- Programmable resistance values between the A terminal and the wiper or the B terminal and the wiper, with a fixed A-to-B terminal resistance of 10 kΩ, 50 kΩ, or 100 kΩ.
- Power shutdown feature (SHDN pin) that forces an open circuit on the A terminal and shorts the wiper to the B terminal, achieving a microwatt power shutdown state.
- Internal reset block that forces the wiper to the midscale position during every power-up condition.
- Digital interface remains active during shutdown, allowing code changes to produce new wiper positions when the device is resumed from shutdown.
- ESD protection on digital input pins.
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 AD5207BRU100-REEL7 used for?
The AD5207BRU100-REEL7 is used as a digital potentiometer, replacing mechanical potentiometers in various applications such as audio level control, instrumentation, and automotive electronics adjustment.
- How many channels does the AD5207BRU100-REEL7 have?
The AD5207BRU100-REEL7 has two channels.
- What are the available resistor values for the AD5207BRU100-REEL7?
The AD5207BRU100-REEL7 specifically offers a 100 kΩ resistor value, but the AD5207 series also includes 10 kΩ and 50 kΩ options.
- What is the temperature range of the AD5207BRU100-REEL7?
The AD5207BRU100-REEL7 operates over an extended industrial temperature range of -40°C to +125°C.
- How does the power shutdown feature work?
The power shutdown feature (SHDN pin) forces an open circuit on the A terminal and shorts the wiper to the B terminal, achieving a microwatt power shutdown state. The previous resistance values are maintained during shutdown.
- What type of interface does the AD5207BRU100-REEL7 use?
The AD5207BRU100-REEL7 uses a 3-wire SPI-compatible serial input interface.
- What is the package type of the AD5207BRU100-REEL7?
The AD5207BRU100-REEL7 is available in a 14-TSSOP package.
- How much current does the AD5207BRU100-REEL7 consume during shutdown?
The AD5207BRU100-REEL7 consumes less than 5 μA during shutdown.
- What happens to the wiper position during power-up?
During power-up, the wiper is forced to the midscale position by an internal reset block.
- Is the digital interface active during shutdown?
Yes, the digital interface remains active during shutdown, allowing code changes to produce new wiper positions when the device is resumed from shutdown.
- Does the AD5207BRU100-REEL7 have ESD protection?
Yes, the AD5207BRU100-REEL7 has ESD protection on its digital input pins.
