IC-Mart Your Trusted Source for Digital Potentiometer Chips

(from leading manufacturers)

International Manufacturers & Typical Chips

1. Analog Devices (ADI) – Industry Leader

Typical Model	Channels	Interface	Memory Type	Features / Applications
AD5206	6	SPI	Volatile	Multi-channel, general purpose control (Classic)
AD5174	1	SPI	Non-Volatile	High precision, ±1% tolerance, industrial instruments
AD5292	1	SPI	20-TP	High voltage (up to 33V), precision trimming
DS1267B	2	SPI	Volatile	Dual symmetric channels, audio processing (ex-Maxim)
MAX5407	1	3-Wire	Volatile	Log taper (Audio), 32-step volume control

2. Microchip – Cost-Effective & General Purpose

Typical Model	Channels	Interface	Memory Type	Features / Applications
MCP4131	1	SPI	Volatile	7-bit (128 steps), ultra-low power, low cost
MCP4011	1	Up/Down	Non-Volatile	Minimal 6-pin (SOT-23) package
MCP4261	2	SPI	Non-Volatile	Integrated EEPROM, dual-channel auto-calibration
MCP41HV51	1	SPI	Non-Volatile	High voltage (36V support), large signal handling

3. Texas Instruments (TI) – High Integration & Precision

Typical Model	Channels	Interface	Memory Type	Features / Applications
TPL0102	2	I2C	Non-Volatile	256 steps, EEPROM included, portable devices
TPL0501	1	SPI	Volatile	Tiny package, low temp drift (35 ppm/°C)
TPL0401	1	I2C	Volatile	Low voltage (2.25V–5.5V), mobile/tablet use

4. Renesas (Intersil Legacy) – Classic Lineage

Typical Model	Channels	Interface	Memory Type	Features / Applications
X9C103	1	Up/Down	Non-Volatile	Industry benchmark, 10kΩ, push-button control
X9C104	1	Up/Down	Non-Volatile	100kΩ version, basic circuit adjustment
X9241A	4	I2C	Non-Volatile	Quad-channel, 64 steps, legacy industrial control

5. onsemi – Specific Applications

Typical Model	Channels	Interface	Memory Type	Features / Applications
CAT5113	1	Up/Down	Non-Volatile	100 steps, buffered wiper output, strong drive
CAT5115	1	Up/Down	Volatile	32 steps, powers up at mid-scale, simple structure

Major Chinese Domestic Manufacturers & Typical Models

• SGMICRO:​ A leader in domestic analog chips covering industrial and automotive grades. Key models include SGM3157​ (32-tap, ±15V tolerant, automotive audio) and SGM5121 Series​ (I2C/SPI, 8-10 bit, AEC-Q100 certified for BMS).
• 3PEAK:​ Focuses on high precision and low noise for medical equipment. The TPD10x Series​ features dual independent channels, <5ppm/°C drift, and <±0.5% initial accuracy.
• CHIPSEA:​ Specializes in high-precision, low-power signal chains for wearables. Models like CS32A01X​ (128/256 levels, temp compensation, NVM) and CS125x​ (built-in calibration algorithms) are common.
• RunIC:​ Known for cost-effective solutions in consumer markets. The RS880x Series​ offers wide voltage (2.7V–5.5V) in TSSOP/QFN packages for smart home appliances.
• Joulwatt:​ Leverages HV BCD processes for industrial motor drives. The JW391x Series​ integrates EEPROM, withstands ±8kV ESD, and suits PLC modules.
• NOVOSENSE:​ Targets high-voltage reliability for PV and telecom. The NSi8308 Series​ handles ±50V, features 256 taps, and >100dB channel isolation for inverters.

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1. What is a Digital Potentiometer?

Traditional pots rely on manual rotation. DigiPots are solid-state devices built with three core parts:

• Resistor Ladder:​ A series of precision resistors.
• CMOS Switch Array:​ Acts as the “electronic wiper.”
• Control Logic & Memory:​ Receives MCU commands; stores state (Volatile or Non-Volatile).

Basic Operating Principle

Assume a DigiPot has a total resistance RAB​and 256 steps (8-bit). Sending a digital value Dcalculates the wiper-to-bottom resistance RWB​as:

RWB​(D)=256/D​×RAB​+RW​

Where RW​is the small internal switch resistance (typically tens of ohms).

2. Typical Application Scenarios

DigiPots excel in automated, vibration-prone environments:

• A. Industrial Automation & Sensor Calibration:​ Auto-calibrating gain/offset in pressure transmitters or load cells without manual screws.
• B. Audio Equipment:​ Volume/gain control. No mechanical wear means no scratchy noise during rotation.
• C. Power Management:​ Adjusting DC-DC/LDO feedback pins via software to tune output voltage dynamically (used in BMS).
• D. Filter Tuning:​ Replacing fixed resistors in RC filters to adjust cutoff frequency on the fly.
• E. Bias Control:​ Precisely setting laser driver current or transistor bias in RF/optical modules (5G base stations).

3. Digital vs. Mechanical Potentiometer

Feature	Digital Potentiometer (DigiPot)	Mechanical Potentiometer
Adjustment	Software (I2C/SPI)	Manual physical turn
Reliability	Very high, no wear, dust-proof	Lower, prone to oxidation & dust
Size	Miniature (SOT-23)	Bulky
Precision	Defined by steps (e.g., 256)	Theoretically continuous but hard to repeat
Voltage Limit	Limited by supply (typ. 5V or ±15V)	Can handle higher voltages
Automation	Supports closed-loop control	Not directly controllable by algorithms

Digital Potentiometer Classification

1. By Memory Type (Logic: Determines Power-Up State)

This is the first decision point for selecting whether the device needs reconfiguration after power loss.

Category	Logic / Description	Typical Model	Manufacturer
Volatile	Loses position on power-down; resets to mid-scale. Low cost.	AD5206 / MCP4131	Analog Devices / Microchip
Non-Volatile	Built-in EEPROM retains position. Ideal for replacing mechanical pots.	AD5174 / X9C104	ADI / Renesas
One-Time Programmable (OTP)	Writable only once. Used for final factory calibration. Lowest cost.	AD5170	Analog Devices

2. By Digital Interface (Logic: Determines System Architecture)

Determines how the chip communicates with the CPU or physical buttons.

Category	Logic / Description	Typical Model	Manufacturer
I2C	Two-wire bus, addressable. Good for pin-constrained systems.	AD5245 / DS3502	ADI / Maxim
SPI	Four-wire, high speed (up to 50MHz). For fast audio/feedback loops.	AD5262 / MCP4151	ADI / Microchip
Up/Down	Pulse-controlled via two pins. Simple logic, works with physical buttons.	MAX5451 / X9C103	Maxim / Renesas
Push Button	Direct connection to two physical buttons (incr/decr). No pull-ups needed.	DS1809 / MAX5486	Maxim

3. By Resistance Curve (Logic: Determines Sensory Response)

Defines the function between digital steps and resistance change.

Category	Logic / Description	Typical Model	Manufacturer
Linear	Resistance proportional to step count. For dividers/bias.	AD5292 / TPL0401	ADI / TI
Logarithmic (Audio)	Non-linear curve matching human ear perception. For volume control.	MAX5407 / AD5222	Maxim / ADI

4. By Voltage Rating & Environment (Logic: Determines Physical Limits)

Defines the analog signal range the chip can handle.

Category	Logic / Description	Typical Model	Manufacturer
Standard (Low V)	Supply typically 2.7V–5.5V. Fits most logic-level circuits.	MCP41010	Microchip
High Voltage (HV)	Analog side handles ±15V or +33V. For industrial ATE/test gear.	AD5290 / MCP41HV51	ADI / Microchip
Precision	Low tolerance (<1%) and low temp coefficient. For instruments.	AD5272 / AD5292	Analog Devices