
Data Acquisition - Digital Potentiometers
Data Acquisition - Digital Potentiometers
Definition:
Digital Potentiometers, often referred to as "digipots," are integrated circuits (ICs) designed to emulate the functionality of traditional mechanical potentiometers but with digital control. These devices provide variable resistance through electronic signals, enabling precise adjustment of voltage division, current control, or signal attenuation in a circuit. As a key component in data acquisition systems, digital potentiometers offer enhanced accuracy, programmability, and reliability compared to their analog counterparts.
Types of Digital Potentiometers:
1. Volatile vs. Non-Volatile:
- Volatile Digipots lose their settings when power is removed, suitable for dynamic applications requiring frequent adjustments.
- Non-Volatile Digipots retain settings after power-off, ideal for preset configurations or memory-critical systems.
Interface Types:
- I2C/SPI-Compatible: Enable serial communication for microcontroller-based designs.
- Up/Down Interface: Simple pulse-controlled adjustment for basic applications.
Resolution & Channels:
- Ranging from 6-bit to 10-bit resolution for fine-tuning precision.
- Single, dual, or quad-channel options to support multi-circuit control.
Purchasing Recommendations:
- Match Resolution to Application: Higher bit counts (e.g., 10-bit) are critical for sensitive analog signal processing, while 6-8 bits suffice for general-purpose use.
- Consider Endurance: For frequently adjusted systems, select digipots with high write-cycle ratings (e.g., >50,000 cycles).
- Verify Voltage Compatibility: Ensure the IC s operating voltage range aligns with your circuit s requirements (e.g., 3.3V, 5V, or 15V).
- Package Size: SMD packages (e.g., TSSOP, QFN) save space in compact designs, while DIP options simplify prototyping.
Digital potentiometers bridge analog flexibility with digital precision, making them indispensable for audio equipment, sensor calibration, and automated test systems. Evaluate technical specs against your design s needs to optimize performance and cost-efficiency.
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AD8402AN100
SERIAL DIGI-POT 256 POSITIONS
MCP42010-I/ST
IC DGT POT 10KOHM 256TAP 14TSSOP
ISL95810WIU8Z
IC DGTL POT 10KOHM 256TAP 8MSOP
X93256WV14IZ-2.7
DIGITAL POTENTIOMETER ICS 32-TAP
MAX5427EUA
OTP, LINEAR-TAPER DIGIPOT
X9314WP-3
DIGIPOT, 32 POSITIONS
X9258US24Z-2.7
IC DGTL POT 50KOHM 256TAP 24SOIC
DS1666S-100+
IC DGT POT 100KOHM 128TAP 16SOIC
ISL22326WFV14Z
IC DGT POT 10KOHM 128TAP 14TSSOP
AD5292BRUZ-50-RL7
IC DGT POT 50KOHM 1024TP 14TSSOP
DS1845E-010+T&R
IC DGTL POT 10KOHM 14TSSOP
X9251UV24IZ-2.7
IC DGT POT 50KOHM 256TAP 24TSSOP
MCP40D18T-503AE/LT
IC DGTL POT 50KOHM 128TAP SC70-6
DS1881Z-050+
IC DGTL POT 45KOHM 64TAP 16SO
MCP4331-503E/ML
IC DGTL POT 50KOHM 129TAP 20QFN
AD5262BRUZ50-RL7
IC DGT POT 50KOHM 256TAP 16TSSOP
X9C103PZ
IC DGTL POT 10KOHM 100TAP 8DIP
MCP4351-503E/ML
IC DGTL POT 50KOHM 257TAP 20QFN
X9313ZMZ-3T1
IC DGTL POT 1KOHM 32TAP 8MSOP
X9315WSZT1
IC DGTL POT 10KOHM 32TAP 8SOIC