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Analog Devices Inc./Maxim Integrated MAX5418PETA+T
- Part No.:
- MAX5418PETA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Potentiometers
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX5418PETA+T.pdf
- Description:
- IC DGTL POT 100KOHM 256TAP 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,062
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Product details
Overview
MAX5418PETA+T 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 LCD contrast control circuits operating from +2.7V to +5.25V supply.
For engineers reviewing the MAX5418PETA+T datasheet, MAX5418PETA+T pinout, MAX5418PETA+T application, or MAX5418PETA+T equivalent, this page delivers verified specifications, package mapping, I²C timing compliance, wiper settling behavior, and real-world design context for low-drift programmable resistor selection.
Technical Context
The MAX5418PETA+T implements a 255-element resistor string between H and L terminals, with wiper (W) selectable across 256 discrete tap points via an I²C-compatible 2-wire interface. Its internal EEPROM stores wiper position for power-on recall, and its ratiometric temperature coefficient of 5ppm/°C enables stable voltage-divider operation across -40°C to +85°C.
It supports fast-mode I²C communication up to 400kHz, features eight unique address combinations via A0 pin and factory-set address bits, and operates with 500nA typical standby current. Wiper settling time is 600ns (typ), and wiper bandwidth is 50kHz at midscale with 10pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-End Resistance | 100kΩ - defines full-scale adjustment range in variable-resistor or voltage-divider configurations |
| Tap Count | 256 - provides 0.39% resolution per step for fine-grained analog control |
| INL / DNL (Voltage-Divider Mode) | ±0.5 LSB - ensures monotonicity and <0.1% transfer function error for precision gain setting |
| Tempco (End-to-End) | 35ppm/°C - limits resistance drift to ±0.3% over full -40°C to +85°C industrial range |
| I²C Clock Frequency | 400kHz - enables rapid wiper updates without MCU polling overhead or bus contention |
| Supply Voltage Range | +2.7V to +5.25V - supports direct interfacing with 3.3V and 5V logic systems |
| Wiper Settling Time | 600ns (typ) - allows sub-microsecond reconfiguration in dynamic calibration loops |
Pinout & Package
MAX5418PETA+T is housed in a lead(Pb)-free, RoHS-compliant 3mm × 3mm 8-pin TDFN-EP package with exposed pad internally connected to GND for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power supply input | Accepts +2.7V to +5.25V; requires local 0.1µF bypass to GND for noise immunity |
| SCL (Pin 2) | I²C clock input | CMOS-compatible input; requires external pullup (typically 4.7kΩ) for open-drain bus operation |
| SDA (Pin 3) | I²C bidirectional data line | Open-drain output/input; shares same pullup as SCL; supports multi-master arbitration |
| A0 (Pin 4) | Address select input | Configures LSB of 7-bit slave address; GND/VDD choice yields two unique addresses per part variant |
| GND (Pin 5) | Ground reference | Primary return path; exposed pad must be soldered to large PCB ground plane for thermal stability |
| L (Pin 6) | Low terminal of resistor string | Connects to system ground or negative reference; voltage must remain within GND–VDD range |
| W (Pin 7) | Wiper terminal | Output node for voltage divider or variable resistor; unloaded settling time is 600ns (typ) |
| H (Pin 8) | High terminal of resistor string | Connects to VDD or positive reference; forms resistive divider with L and W terminals |
Key Features
| Feature | Design Value |
|---|---|
| Nonvolatile wiper storage | EEPROM retains last wiper position for automatic power-on recall-eliminates startup calibration |
| Ratiometric tempco | 5ppm/°C ensures stable voltage-division ratio across temperature-critical for gain accuracy in op-amp feedback |
| Ultra-low standby current | 500nA (typ) enables use in battery-powered systems without compromising update responsiveness |
| Eight unique I²C addresses | Four factory-set base addresses + A0 pin toggling allow up to eight MAX5418PETA+T devices on one bus |
| Robust absolute ratings | Withstands -0.3V to +6.0V on VDD and -0.3V to (VDD + 0.3V) on all other pins-enhances board-level ESD resilience |
Applications
| LCD Contrast Control | Programmable Gain Amplifier |
|---|---|
|
Use Scenario: Adjusting bias voltage for monochrome or segment-based LCD displays in industrial HMIs and medical instruments. IC Role / Device Role / Timing Role: Acts as digitally controlled voltage divider between VDD and GND, feeding adjustable DC bias to LCD common electrode. Use Value: Enables firmware-controlled contrast tuning without manual trimmers; 100kΩ value matches typical LCD impedance requirements. |
Use Scenario: Setting precise closed-loop gain in instrumentation amplifiers used for sensor signal conditioning. IC Role / Device Role / Timing Role: Configures feedback resistor ratio in op-amp circuits (e.g., MAX410), where wiper position determines gain magnitude. Use Value: ±0.5 LSB INL ensures <0.1% gain error; 5ppm/°C ratiometric tempco maintains gain stability across operating temperature. |
| Adjustable Voltage Reference | Offset Nulling Circuit |
|
Use Scenario: Fine-tuning output voltage of precision references like MAX6160 in ADC reference buffers and DAC output stages. IC Role / Device Role / Timing Role: Functions as programmable feedback resistor pair in shunt or series reference topologies. Use Value: 100kΩ nominal resistance provides optimal bias current vs. noise trade-off; nonvolatile storage preserves calibrated reference point. |
Use Scenario: Compensating input offset voltage over temperature in high-accuracy op-amps (e.g., MAX410) used in strain gauge interfaces. IC Role / Device Role / Timing Role: Connects H/L to NULL inputs and W to supply rail to inject trimming current into op-amp null terminals. Use Value: 256-step resolution enables sub-mV offset correction; low tempco prevents re-trimming during thermal cycling. |
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-R7 | 100kΩ, 256-tap, I²C interface, but uses volatile-only memory (no power-on recall) | Requires MCU initialization at boot; unsuitable for systems needing immediate post-power-up wiper state | Select when cost sensitivity outweighs nonvolatile retention need and host firmware guarantees initialization |
| MCP45HV51-103E/MS | 100kΩ, 256-tap, I²C interface, supports 5.5V max supply and higher wiper current (±1mA) | Better suited for high-voltage biasing or driving heavier loads; lacks ratiometric 5ppm/°C tempco | Prefer when operating above 5.25V or driving >0.6mA through wiper; accept wider tempco for robustness |
Compared with AD5171BRMZ-100-R7 and MCP45HV51-103E/MS, MAX5418PETA+T uniquely combines guaranteed power-on wiper recall, ultra-low 5ppm/°C ratiometric tempco, and industrial-grade -40°C to +85°C operation-making it optimal for unattended, precision analog control loops.
Availability
MAX5418PETA+T is available at Aetrix Electronics and suitable for LCD contrast control, programmable gain amplifier design, and adjustable voltage reference circuits requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX5418PETA+T 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 precision analog and mixed-signal ICs for industrial, medical, and communications applications, emphasizing low-power, high-accuracy, and robust performance.
The MAX5417/MAX5418/MAX5419 family was engineered specifically for replacing mechanical potentiometers in digitally controlled analog circuits-prioritizing nonvolatile retention, low tempco, and compact packaging for space-constrained systems.
FAQ
What is the nominal end-to-end resistance of MAX5418PETA+T?
The MAX5418PETA+T has a nominal end-to-end resistance of 100kΩ, confirmed in the Ordering Information table and Electrical Characteristics section. This value is fixed per device variant (MAX5417 = 50kΩ, MAX5418 = 100kΩ, MAX5419 = 200kΩ) and applies across the full -40°C to +85°C operating range with ±25% tolerance at room temperature.
Does MAX5418PETA+T retain its wiper position after power cycling?
Yes, MAX5418PETA+T retains its wiper position after power cycling using an internal nonvolatile EEPROM. Upon power-up, the stored wiper value is automatically loaded into the volatile register within 10µs, ensuring immediate operational readiness without host MCU intervention.
What is the maximum I²C clock frequency supported by MAX5418PETA+T?
MAX5418PETA+T supports fast-mode I²C operation up to 400kHz, as specified in the Electrical Characteristics table under "SCL Clock Frequency". This allows efficient wiper updates while maintaining compatibility with standard microcontroller I²C peripherals without requiring custom timing firmware.
How many unique I²C addresses can be configured for MAX5418PETA+T?
MAX5418PETA+T supports eight unique I²C addresses: four factory-preset base addresses (010100xx to 010111xx) combined with the A0 pin (Pin 4), which selects between two variants per base address. This enables up to eight identical MAX5418PETA+T devices on a single I²C bus without address conflict.
What is the wiper temperature coefficient specification for MAX5418PETA+T?
MAX5418PETA+T specifies a 5ppm/°C ratiometric temperature coefficient, meaning the *ratio* of wiper-to-H and wiper-to-L resistances remains highly stable with temperature-critical for voltage-divider accuracy. Its end-to-end tempco is 35ppm/°C, consistent across the 100kΩ variant.
MAX5418PETA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- ±25%
- 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+T FAQ
1.How can I place an order for MAX5418PETA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5418PETA+T 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+T reliable?
The price and inventory of MAX5418PETA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5418PETA+T is usually 5 days.
3.What payment methods are accepted for MAX5418PETA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5418PETA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5418PETA+T?
MAX5418PETA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5418PETA+T 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+T?
For technical support, including MAX5418PETA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5418PETA+T requirements.
6.How does Aetrix verify that MAX5418PETA+T is sourced from the original manufacturer or authorized distributors?
All MAX5418PETA+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX5418PETA+T?
All MAX5418PETA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5418PETA+T, 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+T part is unused and in its original packaging.
Return procedure for MAX5418PETA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX5418PETA+T Tags
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MCP4018T-103E/LT
Microchip Technology
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MCP4018T-503E/LT
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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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