Overview
The AD5122BRUZ100-RL7 is a dual-channel, 128-position, SPI, nonvolatile digital potentiometer produced by Analog Devices Inc. This device is part of the AD5122/AD5142 series, offering versatile programmability and high performance for various adjustment applications. It features low resistor tolerance, high bandwidth, and low total harmonic distortion, making it suitable for a range of applications including filter design, portable electronics, and programmable power supplies.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resistance Options | 10 kΩ, 100 kΩ | |||
| Resistor Tolerance | ±8% | |||
| Wiper Current | -6 | 6 | mA (RAB = 10 kΩ) | |
| -1.5 | 1.5 | mA (RAB = 100 kΩ) | ||
| Bandwidth | 3 MHz | (RAB = 10 kΩ) | ||
| 0.43 MHz | (RAB = 100 kΩ) | |||
| Total Harmonic Distortion (THD) | -80 dB | (RAB = 10 kΩ, f = 1 kHz) | ||
| -90 dB | (RAB = 100 kΩ, f = 1 kHz) | |||
| Operating Temperature Range | -40°C | 125°C | ||
| Logic Supply Voltage | 1.8 V | 5.5 V | ||
| Package Type | 16-Lead TSSOP, 16-Lead LFCSP (3mm x 3mm) |
Key Features
- Versatile programmability with read/write access in RDAC and EEMEM registers.
- Increment/decrement of resistance, resistance changes in ±6 dB scales, and wiper setting read-back.
- Low resistor tolerance of ±8% maximum.
- High bandwidth of up to 3 MHz and low total harmonic distortion (THD) for optimal performance with ac signals.
- Fast start-up time of less than 75 μs.
- Linear gain setting mode for independent programming of resistance between digital potentiometer terminals.
- Single- and dual-supply operation with independent logic supply from 1.8 V to 5.5 V.
- Compact package options including 16-lead TSSOP and 16-lead LFCSP (3mm x 3mm).
- Qualified for automotive applications.
Applications
- Portable electronics level adjustment.
- LCD panel brightness and contrast controls.
- Programmable filters, delays, and time constants.
- Programmable power supplies.
Q & A
- What are the resistance options for the AD5122BRUZ100-RL7?
The AD5122BRUZ100-RL7 offers resistance options of 10 kΩ and 100 kΩ.
- What is the resistor tolerance of the AD5122BRUZ100-RL7?
The resistor tolerance is ±8% maximum.
- What is the bandwidth of the AD5122BRUZ100-RL7?
The bandwidth is up to 3 MHz for a 10 kΩ resistance and 0.43 MHz for a 100 kΩ resistance.
- What is the total harmonic distortion (THD) of the AD5122BRUZ100-RL7?
The THD is -80 dB for a 10 kΩ resistance and -90 dB for a 100 kΩ resistance at 1 kHz.
- What are the operating temperature ranges for the AD5122BRUZ100-RL7?
The operating temperature range is from -40°C to 125°C.
- What package types are available for the AD5122BRUZ100-RL7?
The device is available in 16-lead TSSOP and 16-lead LFCSP (3mm x 3mm) packages.
- Is the AD5122BRUZ100-RL7 suitable for automotive applications?
Yes, it is qualified for automotive applications.
- What is the logic supply voltage range for the AD5122BRUZ100-RL7?
The logic supply voltage range is from 1.8 V to 5.5 V.
- How does the AD5122BRUZ100-RL7 support programmable resistance changes?
The device supports increment/decrement of resistance, resistance changes in ±6 dB scales, and wiper setting read-back through an SPI-compatible digital interface.
- What are some common applications of the AD5122BRUZ100-RL7?
Common applications include portable electronics level adjustment, LCD panel brightness and contrast controls, programmable filters, delays, and time constants, and programmable power supplies).
