Overview
The AD5270BRMZ-20, produced by Analog Devices Inc., is a single-channel digital rheostat that combines industry-leading variable resistor performance with nonvolatile memory (NVM). This component is part of the AD5270/AD5271 series, offering 1024-position resolution and a nominal resistance of 20 kΩ. It is designed to provide high precision and reliability, making it suitable for a variety of applications that require adjustable resistance.
Key Specifications
| Parameter | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Resolution | - | 10 Bits | - | - | - | - |
| Resistor Integral Nonlinearity | R-INL | RAW = 20 kΩ, |VDD − VSS| = 3.0 V to 5.5 V | -1 | - | +1 LSB | - |
| Resistor Differential Nonlinearity | R-DNL | - | -1 | - | +1 LSB | - |
| Nominal Resistor Tolerance | R-Perf Mode | - | -1% | - | +1% | - |
| Resistance Temperature Coefficient | - | Code = full scale | - | - | 5 ppm/°C | - |
| Wiper Resistance | - | Code = zero scale | 35 | - | 70 Ω | - |
| Supply Voltage | VDD | - | 2.7 V | - | 5.5 V | - |
| Dual-Supply Operation | VDD/VSS | - | ±2.5 V to ±2.75 V | - | - | - |
| Interface | - | SPI-compatible | - | - | - | - |
Key Features
- Single-channel, 1024-position resolution
- 20 kΩ nominal resistance with ±1% nominal resistor tolerance error
- 50-times programmable (50-TP) wiper memory
- Rheostat mode temperature coefficient: 5 ppm/°C
- 2.7 V to 5.5 V single-supply operation and ±2.5 V to ±2.75 V dual-supply operation
- SPI-compatible interface
- Wiper setting readback
- Power on refreshed from 50-TP memory
- Compact LFCSP and MSOP packages
Applications
- Mechanical rheostat replacements
- Op-amp: variable gain control
- Instrumentation: gain, offset adjustment
- Programmable voltage to current conversions
- Programmable filters, delays, time constants
- Programmable power supply
- Sensor calibration
Q & A
- What is the resolution of the AD5270BRMZ-20?
The AD5270BRMZ-20 has a resolution of 1024 positions. - What is the nominal resistance of the AD5270BRMZ-20?
The nominal resistance is 20 kΩ. - What is the nominal resistor tolerance error of the AD5270BRMZ-20?
The nominal resistor tolerance error is ±1%. - What type of memory does the AD5270BRMZ-20 have?
The AD5270BRMZ-20 has 50-times programmable (50-TP) wiper memory. - What is the temperature coefficient of the AD5270BRMZ-20 in rheostat mode?
The temperature coefficient is 5 ppm/°C. - What are the supply voltage ranges for the AD5270BRMZ-20?
The supply voltage ranges are 2.7 V to 5.5 V for single-supply and ±2.5 V to ±2.75 V for dual-supply operation. - What type of interface does the AD5270BRMZ-20 use?
The AD5270BRMZ-20 uses an SPI-compatible interface. - Can the wiper setting be read back on the AD5270BRMZ-20?
Yes, the wiper setting can be read back. - How is the power-on state of the AD5270BRMZ-20 managed?
The power-on state is refreshed from the 50-TP memory. - What are the package options for the AD5270BRMZ-20?
The package options include thin LFCSP and compact MSOP.
