Overview
The AD5207BRUZ50, produced by Analog Devices Inc., is a dual-channel, 256-position digitally controlled variable resistor (VR) device. This component functions as a digital potentiometer, offering the same electronic adjustment capabilities as a mechanical potentiometer or variable resistor. Each channel of the AD5207 contains a fixed resistor with a wiper contact that can be programmed to tap the fixed resistor at various points, allowing for a completely programmable value of resistance between the A terminal and the wiper or the B terminal and the wiper.
The device is available in a 1.1 mm thin TSSOP-14 package, making it suitable for applications requiring compact form factors, such as PCMCIA applications. It operates over an extended industrial temperature range of -40°C to +125°C and supports both single-supply (+2.7 to +5.5 V) and dual-supply (±3 V) configurations.
Key Specifications
| Specification | Value |
|---|---|
| Number of Channels | 2 |
| Number of Positions | 256 |
| End-to-End Terminal Resistances | 10 kΩ, 50 kΩ, 100 kΩ |
| Supply Voltage | +2.7 to +5.5 V (single-supply), ±3 V (dual-supply) |
| Operating Temperature Range | -40°C to +125°C |
| Package Type | 14-Lead TSSOP |
| Channel-to-Channel Matching Tolerance | ±1% |
| Temperature Coefficient | 500 ppm/°C |
| Digital Interface | 3-Wire SPI Compatible |
Key Features
- Dual-channel, 256-position digitally controlled variable resistor.
- Completely programmable resistance values between A terminal and wiper or B terminal and wiper.
- 3-Wire SPI compatible serial data input and output.
- Power shutdown feature (SHDN pin) to minimize power consumption.
- Internal reset block forces the wiper to the midscale position during power-up.
- High glitch minimization through unique switching circuitry.
- No make-before-break or break-before-make operation.
- Digital inputs protected with series input resistor and parallel Zener ESD structure.
Applications
- Mechanical potentiometer replacement.
- Stereo channel audio level control.
- Instrumentation: gain and offset adjustment.
- Programmable voltage-to-current conversion.
- Programmable filters, delays, and time constants.
- Line impedance matching.
- Automotive electronics adjustment.
Q & A
- What is the AD5207BRUZ50 used for?
The AD5207BRUZ50 is used as a digital potentiometer, replacing mechanical potentiometers in various applications such as audio level control, instrumentation, and automotive electronics.
- What are the available end-to-end terminal resistances for the AD5207?
The AD5207 is available with end-to-end terminal resistances of 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating temperature range of the AD5207?
The AD5207 operates over an extended industrial temperature range of -40°C to +125°C.
- How does the power shutdown feature work on the AD5207?
The power shutdown feature, activated by the SHDN pin, forces an open circuit on the A terminal and shorts the wiper to the B terminal, minimizing power consumption.
- What type of digital interface does the AD5207 use?
The AD5207 uses a 3-Wire SPI compatible serial data input and output interface.
- How many positions can the wiper be set to in the AD5207?
The wiper can be set to 256 different positions.
- What is the package type of the AD5207?
The AD5207 is available in a 14-Lead TSSOP package.
- What is the channel-to-channel matching tolerance of the AD5207?
The channel-to-channel matching tolerance is ±1%.
- How is the resistance value programmed in the AD5207?
The resistance value is programmed by clocking in a 10-bit serial data word into the SDI pin.
- Does the AD5207 have any ESD protection?
Yes, the digital inputs are protected with a series input resistor and parallel Zener ESD structure.
