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Analog Devices Inc./Maxim Integrated MAX5463EXK+T
- Part No.:
- MAX5463EXK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Potentiometers
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX5463EXK+T.pdf
- Description:
- IC DGTL POT 50KOHM 32TAP SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,823
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Product details
Overview
The MAX5463EXK+T from Maxim Integrated is a 50kΩ, 32-tap linear-taper digital potentiometer in a 5-pin SC70 package, configured as a variable resistor with 2-wire up/down serial interface, ±1.3mA max terminal current, and ultra-low 0.3µA standby supply current - used for precision gain adjustment and LCD contrast control in space-constrained analog front-ends.
For engineers reviewing the MAX5463EXK+T datasheet, MAX5463EXK+T pinout, MAX5463EXK+T application, or MAX5463EXK+T equivalent, this device serves as a drop-in replacement for mechanical potentiometers where digital control, temperature stability (5ppm/°C ratiometric tempco), and glitchless tap switching are required in industrial and consumer display systems.
Technical Context
The MAX5463EXK+T implements a fixed 50kΩ resistor array with digitally controlled wiper position selected via asynchronous 2-wire CS/U/D signaling - no clock required. Its internal 5-bit up/down counter drives a 32-position decoder that selects one of 32 resistive taps between H and L terminals.
Power-on reset initializes the wiper to midscale (tap 16), and mode persistence ensures stable operation after CS deactivation. The device operates from +2.7V to +5.5V, supports rail-to-rail wiper voltage swing (0V to VDD), and exhibits ±1 LSB DNL and ±1 LSB INL over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-End Resistance | 50kΩ ±25% - defines full-scale resistance range for gain/attenuation scaling in op-amp feedback networks. |
| Resolution | 32 taps - provides 31 discrete resistance steps (≈3.2% per step) for fine-grained analog tuning. |
| Ratiometric Tempco | 5 ppm/°C - ensures stable voltage division ratio across -40°C to +85°C, critical for temperature-invariant biasing. |
| Wiper Resistance | 600Ω to 1200Ω - impacts signal integrity in high-impedance paths; limits usable frequency range in AC-coupled applications. |
| Supply Current (Standby) | 0.3µA at VDD = +5V - enables always-on configuration in battery-powered displays without significant drain. |
| U/D Toggle Rate | 1MHz - supports rapid wiper repositioning (e.g., auto-contrast algorithms) without timing constraints. |
| Settling Time | 0.25µs (100kΩ config, CL = 10pF) - determines minimum update interval for dynamic resistance changes. |
Pinout & Package
MAX5463EXK+T is housed in a 5-pin SC70 package (package code X5-1), measuring 2.0mm × 1.25mm × 0.95mm, with exposed pad not connected internally. Pin 1 is VDD, Pin 2 is GND, Pin 3 is U/D, Pin 4 is CS, and Pin 5 is H - L and W terminals are internally tied to GND and H respectively per variable-resistor configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive power supply input | Accepts +2.7V to +5.5V; powers internal logic and resistor array; must be decoupled locally. |
| GND (Pin 2) | Circuit ground reference | Common return for VDD, CS, U/D, and internal low-side switch; connects L terminal in variable-resistor mode. |
| U/D (Pin 3) | Direction control input | Low-to-high transition increments or decrements wiper position depending on active mode set by CS edge. |
| CS (Pin 4) | Chip select / mode latch | High-to-low edge latches U/D state to enter increment (U/D = high) or decrement (U/D = low) mode. |
| H (Pin 5) | High terminal of resistor array | Connects to one end of 50kΩ resistor; wiper moves between H and GND (L); forms two-terminal variable resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Glitchless tap switching | Eliminates transient voltage spikes during wiper transitions - essential for noise-sensitive audio and sensor bias circuits. |
| Power-on reset to midscale | Guarantees known initial resistance (25kΩ) at startup - prevents undefined output states in LCD bias or amplifier gain chains. |
| 2-wire serial interface | Requires only CS and U/D signals - reduces PCB routing complexity and eliminates clock line skew or synchronization overhead. |
| Ultra-low standby current | 0.3µA at +5V enables integration into always-on subsystems (e.g., display backlight controllers) without compromising battery life. |
| SC70-5 package | 2.0mm × 1.25mm footprint saves >60% board area vs. SOIC-8 potentiometers - ideal for compact handheld and wearable devices. |
Applications
| LCD Contrast Control | Op-Amp Gain Adjustment |
|---|---|
|
Use Scenario: Digitally adjusting DC bias voltage applied to LCD segment drivers to maintain optimal contrast across varying ambient temperatures and panel aging. IC Role / Device Role / Timing Role: Variable resistor setting reference voltage divider ratio for MAX1771-based positive LCD bias generator. Use Value: Replaces manual trimmer with factory-programmable, temperature-stable resistance (5ppm/°C ratiometric tempco) eliminating field recalibration. |
Use Scenario: Dynamically configuring closed-loop gain of noninverting op-amp in programmable sensor signal conditioning path. IC Role / Device Role / Timing Role: Forms adjustable feedback resistor (Rf) in series with fixed Rin, enabling software-selectable gain steps from 1.1× to 10×. Use Value: Achieves <±0.1% gain error stability over -40°C to +85°C due to matched resistor tempcos and low DNL (±1 LSB). |
| Mechanical Potentiometer Replacement | Line Impedance Matching |
|
Use Scenario: Retrofitting legacy analog equipment (e.g., test instrumentation front panels) with digital control while preserving existing PCB layout. IC Role / Device Role / Timing Role: Direct 2-terminal substitution for 50kΩ B-taper mechanical potentiometer using same H–GND connection points. Use Value: Eliminates wear-out failure mode and contact noise; retains identical resistance range and terminal assignment for zero-hardware-change upgrade. |
Use Scenario: Fine-tuning termination resistance in analog video (CVBS) or audio (line-level) distribution networks to minimize signal reflections. IC Role / Device Role / Timing Role: Adjustable series resistor between source and 75Ω coaxial cable, calibrated via microcontroller to match characteristic impedance. Use Value: Enables real-time impedance calibration during system commissioning - achieves <0.5dB return loss improvement vs. fixed 1% tolerance resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5175BRMZ-50 | 256-tap I²C interface, 50kΩ, ±8% end-to-end tolerance, 20ppm/°C tempco | Requires I²C bus and pull-up resistors; higher resolution but looser tempco and tolerance | Choose when higher resolution and standard bus compatibility outweigh tempco and layout simplicity needs. |
| MCP4018T-E/OT | 128-tap U/D interface, 50kΩ, ±20% tolerance, 100ppm/°C tempco, SOT-23-6 | Higher wiper resistance (120Ω typical), wider tempco, larger package | Choose when cost sensitivity dominates and ±100ppm/°C drift is acceptable in non-critical biasing. |
Compared with AD5175BRMZ-50 and MCP4018T-E/OT, the MAX5463EXK+T offers superior temperature stability (5ppm/°C vs. 20ppm/°C and 100ppm/°C), lower standby current (0.3µA vs. 5µA and 1µA), and smaller SC70-5 footprint - making it optimal for precision, low-power, space-constrained analog tuning.
Availability
MAX5463EXK+T is available at Aetrix Electronics and suitable for LCD contrast control, op-amp gain adjustment, and mechanical potentiometer replacement requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for MAX5463EXK+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, mixed-signal, and power management ICs for industrial, medical, communications, and consumer applications.
The MAX5460–MAX5468 family delivers miniature, low-power digital potentiometers optimized for replacing mechanical trimmers in display biasing, sensor calibration, and gain-setting circuits where size, stability, and ease of digital control are critical.
FAQ
What is the terminal configuration of the MAX5463EXK+T?
The MAX5463EXK+T is configured as a 2-terminal variable resistor: Pin 5 (H) and Pin 2 (GND) serve as the high and low terminals, respectively, with the wiper internally connected to H. This matches the electrical behavior of a traditional rheostat and simplifies replacement of mechanical 50kΩ potentiometers in existing designs without rewiring.
Does the MAX5463EXK+T support true 3-terminal potentiometer operation?
No - the MAX5463EXK+T is specifically configured as a variable resistor (rheostat), not a 3-terminal potentiometer. Unlike the MAX5462/MAX5465/MAX5468 variants, it does not expose a dedicated wiper (W) terminal. For true potentiometer use with independent wiper access, select MAX5465EXT or MAX5462EXT instead.
What is the maximum allowable voltage across the MAX5463EXK+T terminals?
The MAX5463EXK+T supports a maximum voltage difference of 5.5V between H and GND (i.e., VH – VGND ≤ +5.5V). Absolute maximum ratings prohibit exceeding VDD + 0.3V at any pin relative to GND, so applying >5.8V total across the device risks permanent damage. Operation within the specified 2.7V–5.5V VDD range ensures safe terminal voltage compliance.
How does the power-on reset function in the MAX5463EXK+T?
The MAX5463EXK+T incorporates internal POR circuitry that forces the wiper to tap 16 (midscale, 25kΩ) upon power application. This occurs regardless of prior state and ensures repeatable startup resistance - critical for LCD bias circuits where uncontrolled initial contrast could damage display drivers or impair user experience before firmware initialization completes.
Can the MAX5463EXK+T be used with supply voltages below 2.7V?
No - the MAX5463EXK+T is not characterized or guaranteed for operation below +2.7V. Electrical specifications including resolution, tempco, and interface timing are validated only across the +2.7V to +5.5V range. Attempting sub-2.7V operation may result in unpredictable wiper positioning, increased DNL/INL, or failure to respond to U/D commands due to insufficient internal logic margin.
MAX5463EXK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- FleaPoT™
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Rheostat
- Number of Circuits:
- 1
- Number of Taps:
- 32
- Resistance (Ohms):
- 50k
- Interface:
- Up/Down (U/D, CS)
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- -
- Tolerance:
- ±25%
- Temperature Coefficient (Typ):
- 35ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SC-70-5
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- -
MAX5463EXK+T FAQ
1.How can I place an order for MAX5463EXK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5463EXK+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 MAX5463EXK+T reliable?
The price and inventory of MAX5463EXK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5463EXK+T is usually 5 days.
3.What payment methods are accepted for MAX5463EXK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5463EXK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5463EXK+T?
MAX5463EXK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5463EXK+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 MAX5463EXK+T?
For technical support, including MAX5463EXK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5463EXK+T requirements.
6.How does Aetrix verify that MAX5463EXK+T is sourced from the original manufacturer or authorized distributors?
All MAX5463EXK+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 MAX5463EXK+T meets industry standards.
7.What is the process for return or replacement of MAX5463EXK+T?
All MAX5463EXK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5463EXK+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 MAX5463EXK+T part is unused and in its original packaging.
Return procedure for MAX5463EXK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX5463EXK+T Tags
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MCP4011T-103E/SN
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