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Analog Devices Inc./Maxim Integrated MAX5418PETA+
- Part No.:
- MAX5418PETA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Potentiometers
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX5418PETA+.pdf
- Description:
- IC DGTL POT 100KOHM 256TAP 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,279
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Product details
Overview
MAX5418PETA+ from Maxim Integrated is a nonvolatile, 256-tap, I²C-interface digital potentiometer with 100kΩ end-to-end resistance, ±0.5 LSB INL/DNL in voltage-divider mode, and 35ppm/°C end-to-end temperature coefficient. It replaces mechanical potentiometers in precision gain-setting and bias control circuits operating from +2.7V to +5.25V supply.
For engineers reviewing the MAX5418PETA+ datasheet, MAX5418PETA+ pinout, MAX5418PETA+ application, or MAX5418PETA+ equivalent, this page delivers verified specifications, validated pin functions, confirmed use cases in programmable amplifiers and LCD biasing, and two technically documented alternative parts for design flexibility.
Technical Context
The MAX5418PETA+ implements a 255-element resistor string with wiper access to all 256 tap points, supporting both voltage-divider and variable-resistor configurations. Its internal EEPROM retains wiper position across power cycles, with guaranteed 50-year data retention and 200,000 store cycles.
It uses a fast-mode I²C interface (up to 400kHz) with factory-preset slave address (010111A0) and user-selectable A0 input, enabling up to eight devices on one bus. Power-on reset loads the nonvolatile register into the volatile register within 10µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-End Resistance | 100kΩ - defines maximum adjustable resistance range for gain/bias scaling in amplifier feedback or LCD contrast networks. |
| Tap Resolution | 256 taps - provides 0.39% step resolution for fine-grained analog adjustment without mechanical wear. |
| INL / DNL | ±0.5 LSB (voltage-divider mode) - ensures monotonicity and predictable transfer function critical for closed-loop gain stability. |
| Tempco (End-to-End) | 35ppm/°C - enables stable resistance over -40°C to +85°C, suitable for industrial-grade programmable references. |
| I²C Speed | 400kbps - supports rapid wiper updates in real-time calibration systems without bus contention delays. |
| Supply Voltage | +2.7V to +5.25V - compatible with single-supply 3.3V and 5V microcontroller systems without level-shifting. |
| Wiper Settling Time | 600ns (typ) - allows sub-microsecond reconfiguration for dynamic filter tuning or adaptive biasing. |
Pinout & Package
MAX5418PETA+ is housed in an 8-pin 3mm × 3mm TDFN package with exposed pad (EP), RoHS-compliant and lead-free. The EP is internally connected to GND and must be soldered to a large ground plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power supply input | Accepts +2.7V to +5.25V; requires local 0.1µF bypass capacitor to GND for noise immunity. |
| SCL (Pin 2) | I²C clock input | Open-drain-compatible input; requires external pullup (typically 4.7kΩ) when shared among multiple masters. |
| SDA (Pin 3) | I²C bidirectional data line | Open-drain output/input; shares same pullup as SCL; supports multi-device arbitration and ACK handshake. |
| A0 (Pin 4) | Address select input | Configures LSB of 7-bit slave address (010111A0); tied to GND or VDD to select between two addresses on same bus. |
| GND (Pin 5) | Ground reference | Primary return path for analog and digital sections; connects internally to exposed pad (EP). |
| L (Pin 6) | Low terminal | Analog end of resistor string; used as ground reference in voltage-divider mode or low-side connection in variable-resistor mode. |
| W (Pin 7) | Wiper terminal | Adjustable tap point; outputs intermediate voltage or variable resistance; unloaded settling time is 600ns (typ). |
| H (Pin 8) | High terminal | Analog end of resistor string; connects to VDD or signal source in voltage-divider mode; defines full-scale resistance range. |
Key Features
| Feature | Design Value |
|---|---|
| Nonvolatile wiper recall | Automatically restores last-set resistance at power-up via embedded EEPROM-eliminates startup calibration in embedded systems. |
| Ratiometric tempco | 5ppm/°C - maintains precise voltage division ratio across temperature, essential for high-stability gain control in instrumentation amplifiers. |
| Low static current | 500nA (typ) standby current - enables battery-powered applications like portable medical devices or IoT sensor nodes. |
| Single-supply operation | +2.7V to +5.25V - simplifies power architecture by eliminating dual-rail supplies required by legacy analog pots. |
| Bus address flexibility | Eight unique I²C addresses via factory preset + A0 pin - supports daisy-chained configuration of multiple MAX5418PETA+ units on one controller. |
Applications
| Low-Drift Programmable-Gain Amplifiers | LCD Contrast Control |
|---|---|
|
Use Scenario: Precision gain adjustment in medical instrumentation amplifiers where drift must remain below 10ppm/°C over full industrial temperature range. IC Role / Device Role / Timing Role: Configures feedback resistance ratio in op-amp circuits; wiper updated via I²C during system calibration or auto-ranging. Use Value: 5ppm/°C ratiometric tempco ensures gain error stays within ±0.01% over -40°C to +85°C, meeting Class I medical device stability requirements. |
Use Scenario: Dynamic contrast adjustment in automotive infotainment displays exposed to cabin temperatures from -40°C to +85°C. IC Role / Device Role / Timing Role: Forms voltage divider with fixed resistor to generate adjustable LCD bias voltage; updated via MCU I²C during display mode changes. Use Value: 100kΩ resistance and 256-step resolution enable smooth, flicker-free contrast transitions without mechanical wear or contact bounce. |
| Volume Control | Programmable Filter Tuning |
|
Use Scenario: Digital audio volume control in industrial HMIs where ESD robustness and long-term reliability exceed mechanical pot lifetime. IC Role / Device Role / Timing Role: Acts as variable resistor in attenuator network; wiper position set by host MCU based on user input or automatic level control. Use Value: ±0.5 LSB DNL guarantees monotonic response-no audible stepping artifacts-and 50k–200kΩ variants support impedance-matched audio paths. |
Use Scenario: Real-time cutoff frequency adjustment in anti-aliasing filters for data acquisition systems sampling at variable rates. IC Role / Device Role / Timing Role: Sets R3 in first-order RC filter; wiper updated synchronously with sample rate changes to maintain consistent bandwidth. Use Value: 600ns wiper settling time enables sub-microsecond filter reconfiguration-critical for adaptive sampling architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5171BRMZ-100 | 100kΩ, 256-tap, I²C, but uses SPI-compatible protocol with different command structure; no A0 address select pin. | Requires firmware rewrite for I²C register mapping; lacks factory-programmed address variants-external logic needed for multi-device bus. | Select when migrating from Analog Devices ecosystem or when SPI-like timing tolerance is preferred over strict I²C compliance. |
| MCP45HV51-103E/MS | 100kΩ, 256-tap, I²C, but rated for 12V tolerant H/L/W pins; higher 1.5mA max wiper current vs. MAX5418PETA+'s ±0.6mA. | Better suited for high-voltage biasing (e.g., OLED gate drivers); not optimized for ultra-low-power standby (1µA vs. 500nA). | Select for mixed-signal systems requiring >5.25V analog rail compatibility while retaining I²C interface and nonvolatile storage. |
Compared with AD5171BRMZ-100 and MCP45HV51-103E/MS, the MAX5418PETA+ offers superior ratiometric tempco (5ppm/°C), lower standby current (500nA), and integrated A0-based addressing-making it optimal for space-constrained, battery-powered, multi-channel precision analog control.
Availability
MAX5418PETA+ is available at Aetrix Electronics and suitable for low-drift programmable-gain amplifiers, LCD contrast control, and volume control applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX5418PETA+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets, emphasizing precision, integration, and reliability.
The MAX5417/MAX5418/MAX5419 family was engineered specifically for replacing mechanical potentiometers in digitally controlled analog circuits-prioritizing nonvolatile memory integrity, low tempco, and I²C interoperability in harsh environments.
FAQ
What is the nominal resistance value of the MAX5418PETA+?
The MAX5418PETA+ has a nominal end-to-end resistance of 100kΩ, as confirmed in the Ordering Information table and Electrical Characteristics section of the datasheet. This value is factory-trimmed and specified with ±20% tolerance over temperature, making it suitable for precision gain-setting applications where absolute resistance accuracy is secondary to ratio stability.
Does the MAX5418PETA+ retain its wiper position after power cycling?
Yes, the MAX5418PETA+ retains its wiper position after power cycling using an internal nonvolatile EEPROM. Upon power-up, the device automatically loads the stored wiper value into the volatile register within 10µs, ensuring repeatable startup behavior without host MCU intervention-critical for unattended industrial systems.
What is the maximum I²C clock frequency supported by the MAX5418PETA+?
The MAX5418PETA+ supports fast-mode I²C operation up to 400kHz, as explicitly stated in the Features list and Electrical Characteristics table. This allows rapid wiper updates-up to 400,000 commands per second-enabling real-time calibration loops and dynamic filter tuning in responsive embedded systems.
Can multiple MAX5418PETA+ devices share the same I²C bus?
Yes, up to eight MAX5418PETA+ devices can share one I²C bus. Each unit ships with one of four factory-preset 7-bit slave addresses (0101xxA0), and the A0 pin selects between two variants per part number-yielding eight unique addresses (e.g., 01011100 and 01011101 for MAX5418PETA+).
What is the temperature coefficient specification for the MAX5418PETA+ in voltage-divider mode?
In voltage-divider mode, the MAX5418PETA+ exhibits a ratiometric temperature coefficient of 5ppm/°C-meaning the *ratio* of W–L to H–L resistance remains highly stable across temperature. This is distinct from its 35ppm/°C end-to-end tempco and is the key parameter for gain-stable amplifier designs.
MAX5418PETA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Strip
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 256
- Resistance (Ohms):
- 100k
- Interface:
- I2C
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 2.7V ~ 5.25V
- Features:
- Selectable Address
- Tolerance:
- -
- Temperature Coefficient (Typ):
- 35ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-TDFN (3x3)
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 325
MAX5418PETA+ FAQ
1.How can I place an order for MAX5418PETA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5418PETA+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX5418PETA+ reliable?
The price and inventory of MAX5418PETA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5418PETA+ is usually 5 days.
3.What payment methods are accepted for MAX5418PETA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5418PETA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5418PETA+?
MAX5418PETA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5418PETA+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX5418PETA+?
For technical support, including MAX5418PETA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5418PETA+ requirements.
6.How does Aetrix verify that MAX5418PETA+ is sourced from the original manufacturer or authorized distributors?
All MAX5418PETA+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX5418PETA+ meets industry standards.
7.What is the process for return or replacement of MAX5418PETA+?
All MAX5418PETA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5418PETA+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX5418PETA+ part is unused and in its original packaging.
Return procedure for MAX5418PETA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX5418PETA+ Tags
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MCP4018T-103E/LT
Microchip Technology
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MCP4018T-503E/LT
Microchip Technology
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MCP4011T-103E/SN
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MCP4018T-104E/LT
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MCP4017T-503E/LT
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MCP4018T-502E/LT
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MCP4017T-103E/LT
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MCP4531T-103E/MF
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MCP4021T-202E/SN
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MCP4023T-103E/CH
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MCP4022T-503E/CH
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MCP4551T-502E/MS
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