Overview
The AD5161BRMZ5, produced by Analog Devices Inc., is a 256-position digital potentiometer that offers a compact and reliable solution for various adjustment applications. This device functions similarly to mechanical potentiometers or variable resistors but with enhanced resolution, solid-state reliability, and a superior low temperature coefficient performance. It is packaged in a 3 mm × 4.9 mm form factor, making it suitable for space-constrained designs.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VDD) | 2.7 | 5.5 | V | ||
| Operating Temperature | -40 | 125 | °C | ||
| Current Consumption (IDD) | 8 | μA | |||
| Temperature Coefficient | 45 | ppm/°C | |||
| Bandwidth (-3dB) | RAB = 5 kΩ, Code = 0x80 | 1.2 | MHz | ||
| Total Harmonic Distortion (THD) | VA = 1 V rms, VB = 0 V, f = 1 kHz | 0.05 | % | ||
| Settling Time (tS) | VA = 5 V, VB = 0 V, ±1 LSB error band | 1 | μs | ||
| Resistor Noise Voltage Density (eN_WB) | RWB = 2.5 kΩ, RS = 0 | 6 | nV/√Hz |
Key Features
- Digital Interface: The AD5161BRMZ5 features a pin-selectable SPI or I2C compatible digital interface, allowing for precise control and readback of the wiper register content.
- Daisy-Chaining: In SPI mode, the device can be daisy-chained using the SDO to SDI connection, enabling multiple devices to share the same control lines.
- Low Power Consumption: With a current consumption of 8 μA, this device is suitable for low-power applications.
- Wide Operating Temperature Range: The device operates over a temperature range of -40°C to +125°C, making it versatile for various environments.
- High Resolution: Offers 256-position adjustment, providing high resolution for precise settings.
Applications
- Mechanical Potentiometer Replacement: Ideal for replacing mechanical potentiometers in new designs due to its solid-state reliability and enhanced performance.
- Transducer Adjustment: Suitable for adjusting pressure, temperature, position, chemical, and optical sensors.
- RF Amplifier Biasing: Can be used for biasing RF amplifiers and adjusting gain and offset.
Q & A
- What is the supply voltage range for the AD5161BRMZ5?
The supply voltage range is from 2.7 V to 5.5 V.
- What is the operating temperature range of the AD5161BRMZ5?
The device operates over a temperature range of -40°C to +125°C.
- What is the current consumption of the AD5161BRMZ5?
The current consumption is 8 μA.
- What digital interfaces are supported by the AD5161BRMZ5?
The device supports both SPI and I2C compatible digital interfaces.
- Can multiple AD5161BRMZ5 devices be daisy-chained?
- What is the resolution of the AD5161BRMZ5?
The device offers 256-position adjustment.
- What are some common applications of the AD5161BRMZ5?
Common applications include mechanical potentiometer replacement, transducer adjustment, and RF amplifier biasing.
- What is the bandwidth of the AD5161BRMZ5?
The bandwidth is 1.2 MHz for a 5 kΩ resistor at code 0x80.
- What is the total harmonic distortion (THD) of the AD5161BRMZ5?
The THD is 0.05% at 1 kHz with VA = 1 V rms and VB = 0 V.
- What is the settling time of the AD5161BRMZ5?
The settling time is 1 μs for a ±1 LSB error band.
