Overview
The AD5121BCPZ10-RL7 is a single-channel, 128-position digital potentiometer produced by Analog Devices Inc. This component is part of the AD5121/AD5141 series, which offers high precision and reliability in various electronic applications. The device features a nonvolatile memory, allowing the wiper position to be retained even when power is turned off. It is available in a compact 16-lead, 3 mm × 3 mm LFCSP package, making it suitable for space-constrained designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resistance Options | 10 kΩ, 100 kΩ | - |
| Resistor Tolerance | 8% maximum | - |
| Wiper Current | ±6 mA (10 kΩ), ±1.5 mA (100 kΩ) | mA |
| Temperature Coefficient | 35 ppm/°C | ppm/°C |
| Wiper Resistance | 40 Ω (at ends of resistor array) | Ω |
| Integral Nonlinearity (INL) | -1 ± 0.2 + 1 LSB (10 kΩ), -0.5 ± 0.1 + 0.5 LSB (100 kΩ) | LSB |
| Differential Nonlinearity (DNL) | -0.5 ± 0.2 + 0.5 LSB | LSB |
| Bandwidth | 3 MHz (10 kΩ), 0.43 MHz (100 kΩ) | MHz |
| Total Harmonic Distortion (THD) | -60 dB | dB |
| Interface | SPI-/I2C-compatible | - |
| Package | 16-lead, 3 mm × 3 mm LFCSP | - |
Key Features
- High precision with low resistor tolerance and low nominal temperature coefficient.
- Linear gain setting mode allowing independent programming of the resistance between the digital potentiometer terminals.
- High bandwidth and low total harmonic distortion (THD) for optimal performance with ac signals.
- Low wiper resistance of only 40 Ω at the ends of the resistor array.
- SPI-/I2C-compatible digital interface for setting wiper values and reading back the wiper register and EEPROM contents.
- Nonvolatile memory to retain wiper position even when power is turned off.
- Compact 16-lead, 3 mm × 3 mm LFCSP package suitable for space-constrained designs.
Applications
The AD5121BCPZ10-RL7 is suitable for a variety of applications, including:
- Audio and video equipment where precise gain control is necessary.
- Industrial control systems requiring accurate and reliable potentiometer functions.
- Medical devices that demand high precision and stability in their circuits.
- Automotive systems where robust and reliable components are essential.
- Filter design and other signal processing applications due to its high bandwidth and low THD.
Q & A
- What is the resistance range of the AD5121BCPZ10-RL7?
The AD5121BCPZ10-RL7 offers resistance options of 10 kΩ and 100 kΩ.
- What is the maximum wiper current for the 10 kΩ and 100 kΩ resistances?
The maximum wiper current is ±6 mA for the 10 kΩ resistance and ±1.5 mA for the 100 kΩ resistance.
- What is the temperature coefficient of the AD5121BCPZ10-RL7?
The temperature coefficient is 35 ppm/°C.
- What is the wiper resistance at the ends of the resistor array?
The wiper resistance at the ends of the resistor array is 40 Ω.
- What interface does the AD5121BCPZ10-RL7 use?
The device uses an SPI-/I2C-compatible digital interface.
- Does the AD5121BCPZ10-RL7 have nonvolatile memory?
Yes, the device has nonvolatile memory to retain the wiper position even when power is turned off.
- What is the package type of the AD5121BCPZ10-RL7?
The device is packaged in a 16-lead, 3 mm × 3 mm LFCSP.
- What are some typical applications of the AD5121BCPZ10-RL7?
Typical applications include audio and video equipment, industrial control systems, medical devices, automotive systems, and filter design.
- What is the bandwidth of the AD5121BCPZ10-RL7 for the 10 kΩ and 100 kΩ resistances?
The bandwidth is 3 MHz for the 10 kΩ resistance and 0.43 MHz for the 100 kΩ resistance.
- What is the total harmonic distortion (THD) of the AD5121BCPZ10-RL7?
The total harmonic distortion (THD) is -60 dB.
