Overview
The AD5252BRUZ1, produced by Analog Devices Inc., is a dual-channel, I2C, nonvolatile memory, digitally controlled potentiometer. This device features 256 positions and is designed to perform the same electronic adjustment functions as mechanical potentiometers, trimmers, and variable resistors. It offers versatile programmability, including read/write access to RDAC and EEMEM registers, linear increment/decrement commands, and ±6 dB step change commands. The AD5252BRUZ1 is available in various resistance options (1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ) and operates over an extended industrial temperature range of –40°C to +105°C.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Resolution | - | - | 8 Bits | - | - |
| Resistor Differential Nonlinearity (R-DNL) | VDD = 5.5 V | -1.00 | ±0.25 | +1.00 | LSB |
| Resistor Nonlinearity (R-INL) | VDD = 5.5 V | -2.0 | ±0.5 | +2.0 | LSB |
| Nominal Resistor Tolerance (ΔRAB/RAB) | TA = 25°C | -20 | - | +20 | % |
| Resistance Temperature Coefficient (ΔRAB/RAB) × 10^6/ΔT | - | - | 650 | - | ppm/°C |
| Single Supply Power Range | VSS = 0 V | 2.7 | - | 5.5 | V |
| Dual Supply Power Range | - | ±2.25 | - | ±2.75 | V |
| Operating Temperature | - | -40 | - | +105 | °C |
| Data Retention | TA = 55°C | - | 100 years | - | - |
Key Features
- I2C-compatible serial interface
- Direct read/write access of RDAC and EEMEM registers
- Predefined linear increment/decrement commands and ±6 dB step change commands
- Synchronous or asynchronous dual-channel update
- Wiper setting readback
- 4 MHz bandwidth (1 kΩ version)
- Resistance tolerance stored in nonvolatile memory
- 12 extra bytes in EEMEM for user-defined information
- Power-on refreshed with EEMEM settings in 300 µs typ
- EEMEM rewrite time = 540 µs typ
Applications
- Mechanical potentiometer replacement
- General-purpose DAC replacement
- LCD panel VCOM adjustment
- White LED brightness adjustment
- RF base station power amp bias control
- Programmable gain and offset control
- Programmable voltage-to-current conversion
- Programmable power supply
- Sensor calibrations
Q & A
- What is the resolution of the AD5252BRUZ1?
The AD5252BRUZ1 has a resolution of 8 bits, providing 256 positions.
- What are the available resistance options for the AD5252BRUZ1?
The AD5252BRUZ1 is available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ resistance options.
- What is the operating temperature range of the AD5252BRUZ1?
The operating temperature range is –40°C to +105°C.
- Does the AD5252BRUZ1 support both single and dual supply operations?
- How long does the EEMEM take to rewrite?
The EEMEM rewrite time is typically 540 µs.
- What is the data retention period of the AD5252BRUZ1?
The data retention period is typically 100 years at TA = 55°C.
- Can the AD5252BRUZ1 be used for mechanical potentiometer replacement?
- Does the AD5252BRUZ1 support synchronous or asynchronous dual-channel updates?
- What is the purpose of the extra bytes in EEMEM?
The extra 12 bytes in EEMEM are for storing user-defined information, such as memory data for other components, lookup tables, or system identification information.
- How does the AD5252BRUZ1 handle power-on settings?
The settings stored in EEMEM are automatically restored to the RDAC registers at system power-on and can also be restored dynamically.
