Overview
The AD5242BRZ1M, manufactured by Analog Devices Inc., is a dual-channel, 256-position, digitally controlled variable resistor (VR) device. This component functions as a digital potentiometer, trimmer, or variable resistor, offering a programmable resistance between the A terminal and the wiper, or the B terminal and the wiper. It is designed to operate over an extended temperature range of −40°C to +105°C, making it versatile for various applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Resolution | N | 8 Bits | ||||
| Resistor Differential Nonlinearity | R-DNL | RWB, VA = no connect | −1 | ±0.4 | +1 | LSB |
| Resistor Integral Nonlinearity | R-INL | RWB, VA = no connect | −2 | ±0.5 | +2 | LSB |
| Nominal Resistor Tolerance | ΔRAB/RAB | TA = 25°C, RAB = 10 kΩ | −30 | +30 | % | |
| TA = 25°C, RAB = 100 kΩ/1 MΩ | −30 | +50 | % | |||
| Resistance Temperature Coefficient | (ΔRAB/RAB)/ΔT × 10^6 | VAB = VDD, wiper = no connect | 30 | ppm/°C | ||
| Power Supply Range (Single-Supply) | VDD | VSS = 0 V | 2.7 | 5.5 | V | |
| Power Supply Range (Dual-Supply) | VDD/VSS | ±2.3 | ±2.7 | V | ||
| Positive Supply Current | IDD | VIH = 5 V or VIL = GND | 0.1 | 50 | µA | |
| Negative Supply Current | ISS | VSS = −2.5 V, VDD = +2.5 V | +0.1 | −50 | µA |
Key Features
- 256-position digitally controlled variable resistor
- Available in 10 kΩ, 100 kΩ, and 1 MΩ versions
- Low temperature coefficient: 30 ppm/°C
- Internal power on midscale preset
- Single-supply 2.7 V to 5.5 V or dual-supply ±2.7 V for ac or bipolar operation
- I2C-compatible interface with readback capability
- Extra programmable logic outputs
- Self-contained shutdown feature
- Extended temperature range: −40°C to +105°C
Applications
- Multimedia, video, and audio
- Communications
- Mechanical potentiometer replacement
- Instrumentation: gain, offset adjustment
- Programmable voltage-to-current conversion
- Line impedance matching
Q & A
- What is the AD5242BRZ1M used for?
The AD5242BRZ1M is used as a digital potentiometer, trimmer, or variable resistor in various applications such as multimedia, communications, instrumentation, and more.
- What are the available resistance values for the AD5242BRZ1M?
The AD5242BRZ1M is available in 10 kΩ, 100 kΩ, and 1 MΩ versions.
- What is the temperature coefficient of the AD5242BRZ1M?
The nominal temperature coefficient of the AD5242BRZ1M is 30 ppm/°C.
- What is the power supply range for the AD5242BRZ1M?
The AD5242BRZ1M can operate on a single-supply from 2.7 V to 5.5 V or a dual-supply from ±2.3 V to ±2.7 V.
- Does the AD5242BRZ1M have programmable logic outputs?
Yes, the AD5242BRZ1M has two extra programmable logic outputs available.
- What is the communication interface used by the AD5242BRZ1M?
The AD5242BRZ1M uses an I2C-compatible, 2-wire serial data interface.
- What is the default wiper position at system power on?
The wiper position defaults to midscale at system power on.
- What are the package options for the AD5242BRZ1M?
The AD5242BRZ1M is available in 14-lead SOIC, 16-lead SOIC, 14-lead TSSOP, and 16-lead TSSOP packages.
- What is the operating temperature range of the AD5242BRZ1M?
The AD5242BRZ1M operates over an extended temperature range of −40°C to +105°C.
- Can multiple AD5242BRZ1M devices be used on the same bus?
Yes, up to four devices can be used on the same bus using the programmable address bits AD0 and AD1.
