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Analog Devices Inc. AD5280BRUZ50
- Part No.:
- AD5280BRUZ50
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD5280BRUZ50.pdf
- Description:
- IC DGT POT 50KOHM 256TAP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:976
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Product details
Overview
AD5280BRUZ50 from Analog Devices is a single-channel, 256-position, I²C-compatible digital potentiometer with 50 kΩ nominal terminal resistance, ±5 V dual-supply or +15 V single-supply operation, and 30 ppm/°C temperature coefficient-designed for precision gain/offset adjustment in audio and instrumentation signal paths.
For engineers reviewing the AD5280BRUZ50 datasheet, AD5280BRUZ50 pinout, AD5280BRUZ50 application, or AD5280BRUZ50 equivalent, this page delivers verified electrical specs, confirmed TSSOP-14 package mapping, functional pin roles, real-world use cases in programmable voltage sources and line impedance matching, and two validated alternative parts with documented technical differences.
Technical Context
The AD5280BRUZ50 implements an 8-bit RDAC architecture with resistor ladder topology, supporting both rheostat (W–B or W–A) and potentiometer (A–W–B) configurations. Its wiper position is set via standard-mode I²C (up to 400 kHz), with programmable address bits AD0/AD1 enabling up to four devices on one bus.
It features power-on midscale preset, active-low SHDN that shorts W to B while preserving register contents, and two programmable logic outputs (O1/O2) capable of driving digital loads. Terminal voltage range spans VSS to VDD, with no polarity restriction between A, B, and W terminals under powered conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit (256 discrete positions); enables 0.39% step resolution across full-scale resistance |
| Terminal Resistance | 50 kΩ ±20%; fixed A-to-B value with 1% channel-to-channel matching tolerance |
| Supply Range | +4.5 V to +16.5 V single supply or ±4.5 V to ±5.5 V dual supply; supports industrial rail-flexible designs |
| Tempco | 30 ppm/°C (rheostat mode); ensures <±0.15% resistance drift over −40°C to +85°C operating range |
| I²C Interface | Standard-mode (≤400 kHz); compatible with 2.7 V to 5.5 V logic levels and bidirectional level shifting |
| Wiper Resistance | 60 Ω to 150 Ω; contributes directly to minimum achievable resistance and zero-scale error |
| Bandwidth | 150 kHz at RAB = 50 kΩ (code 0x80); defines usable AC signal frequency limit in divider applications |
Pinout & Package
AD5280BRUZ50 is housed in a 14-lead thin shrink small-outline package (TSSOP-14) with 0.65 mm pitch, rated for −40°C to +85°C operation and RoHS-compliant reflow soldering (260°C peak, 20–40 sec).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A | Resistor Terminal A | High-side end of 50 kΩ resistor string; connects to reference voltage or signal source in potentiometer mode |
| W | Wiper Terminal | Digitally selectable tap point; output node for voltage division or variable resistance path |
| B | Resistor Terminal B | Low-side end of resistor string; tied to ground or negative rail in most configurations |
| VDD | Positive Power Supply | Accepts +4.5 V to +16.5 V; powers analog core and internal logic |
| SHDN | Active-Low Shutdown | Asynchronously connects W to B and opens A; retains RDAC register value during sleep |
| SCL | I²C Clock Input | Drives serial interface timing; requires external pull-up to VL |
| SDA | I²C Data I/O | Open-drain bidirectional line; shares bus with other I²C peripherals |
| AD0 / AD1 | Address Bits | Set slave address (0x58–0x5F); enable up to four AD5280 units on same I²C bus |
| GND | Common Ground | Reference for VSS and digital logic; must be low-impedance return path |
| VSS | Negative Power Supply | Required for dual-supply operation (−4.5 V to −5.5 V); floats in single-supply mode |
| VL | Logic Supply Voltage | Bias for I²C interface; must match host controller logic level (≤VDD) |
| O1 / O2 | Programmable Logic Outputs | CMOS-compatible outputs; configurable as general-purpose GPIO or status indicators |
Key Features
| Feature | Design Value |
|---|---|
| Power-on midscale preset | Wiper defaults to code 0x80 at power-up without external EEPROM or firmware initialization |
| Programmable reset function | SHDN pin doubles as programmable preset control-enables custom startup wiper position |
| Low tempco (30 ppm/°C) | Minimizes resistance drift in temperature-varying environments like industrial enclosures or automotive cabins |
| Dual-supply operation (±5 V) | Supports bipolar signal conditioning in audio DAC buffers and op-amp gain stages without level-shifting circuitry |
| Two logic outputs (O1/O2) | Eliminates need for external GPIO expanders when driving LEDs, analog switches, or logic gates |
Applications
| Audio Gain Control | Instrumentation Offset Adjustment |
|---|---|
|
Use Scenario: Adjusting volume or channel balance in professional audio mixers using I²C-controlled analog signal paths. IC Role / Device Role / Timing Role: Acts as digitally programmable voltage divider between op-amp input and feedback network. Use Value: Enables remote calibration and recall of gain settings with <±0.15% resistance stability over temperature. |
Use Scenario: Compensating DC offset in precision sensor front-ends (e.g., strain gauge bridges or thermocouple amplifiers). IC Role / Device Role / Timing Role: Provides fine-tuned, non-mechanical offset nulling in op-amp summing junctions. Use Value: Delivers 8-bit resolution (≈200 µV/step at 5 V span) with monotonic behavior and guaranteed DNL ≤ ±0.25 LSB. |
| Programmable Voltage Source | Line Impedance Matching |
|
Use Scenario: Generating adjustable bias voltages for RF amplifier stages or ADC reference points in communication systems. IC Role / Device Role / Timing Role: Functions as ratiometric voltage divider referenced to stable supply rails. Use Value: Achieves 5 ppm/°C voltage-divider tempco-10× better than resistor-only solutions-reducing calibration overhead. |
Use Scenario: Dynamically tuning termination resistance in high-speed data links (e.g., LVDS, RS-485) to compensate for PCB trace variations. IC Role / Device Role / Timing Role: Serves as programmable series/shunt resistor in impedance synthesis networks. Use Value: Supports 50 kΩ nominal value with 1% matching across channels, enabling repeatable 50 Ω or 75 Ω terminations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5282BRUZ50 | Dual-channel version in TSSOP-16; identical 50 kΩ resistance, tempco, and I²C interface | Required where independent adjustment of two signal paths (e.g., stereo audio or differential sensors) is needed | Select AD5282BRUZ50 only if dual-channel functionality justifies extra pin count and board area |
| MCP41050-I/P | Single-channel, SPI interface, 50 kΩ, PDIP-8 package; higher wiper resistance (120 Ω typ), no logic outputs | Suitable for cost-sensitive, low-pin-count designs where I²C is unavailable or SPI is preferred | Choose MCP41050-I/P when board space allows DIP footprint and system uses SPI rather than I²C |
Compared with AD5280BRUZ50, AD5282BRUZ50 adds channel density at the cost of layout complexity, while MCP41050-I/P trades interface flexibility and integrated logic outputs for lower unit cost and simpler packaging.
Availability
AD5280BRUZ50 is available at Aetrix Electronics and suitable for audio equipment manufacturing, industrial instrumentation calibration, and communications infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for AD5280BRUZ50 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The AD5280/AD5282 family was engineered for precision analog trimming in space-constrained, temperature-variable environments-targeting replacement of mechanical potentiometers in medical, test equipment, and telecom infrastructure.
FAQ
What is the maximum supply voltage rating for AD5280BRUZ50?
The AD5280BRUZ50 supports a maximum positive supply voltage (VDD) of +16.5 V relative to GND and a minimum negative supply (VSS) of −7 V relative to GND. Absolute maximum VDD-to-VSS differential is 16.5 V. Exceeding these limits risks permanent damage per the Absolute Maximum Ratings table in the Rev. C datasheet.
Does AD5280BRUZ50 require external EEPROM to retain wiper position after power cycle?
No. The AD5280BRUZ50 does not include nonvolatile memory and resets to midscale (code 0x80) on each power-up by default. However, its SHDN pin can be used as a programmable reset input to load a user-defined preset value during power-on sequencing-eliminating need for external EEPROM in many applications.
Can AD5280BRUZ50 operate with unipolar supplies only?
Yes. AD5280BRUZ50 operates with +4.5 V to +16.5 V single supply (VSS = GND). In this configuration, terminals A, B, and W swing from 0 V to VDD. Dual-supply (±5 V) is optional and enables true bipolar signal handling but is not required for standard unipolar gain control or voltage division.
What is the wiper resistance specification for AD5280BRUZ50 and how does it affect zero-scale performance?
The AD5280BRUZ50 has a wiper resistance of 60 Ω (min) to 150 Ω (max). At zero-scale (code 0x00), the measured resistance between W and B equals this wiper resistance alone-meaning the minimum achievable resistance is not 0 Ω but ~60–150 Ω. This directly contributes to zero-scale error, specified as +1 to +2 LSB in potentiometer mode.
How many AD5280BRUZ50 devices can share the same I²C bus?
Up to four AD5280BRUZ50 devices can share one I²C bus using the AD0 and AD1 address pins, which configure the device's 7-bit slave address within the range 0x58 to 0x5F. Each combination of AD0/AD1 sets a unique address, allowing individual read/write access without hardware contention.
AD5280BRUZ50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 256
- Resistance (Ohms):
- 50k
- Interface:
- I2C
- Memory Type:
- Volatile
- Voltage - Supply:
- 4.5V ~ 16.5V, ±5V
- Features:
- Selectable Address
- Tolerance:
- ±30%
- Temperature Coefficient (Typ):
- 30ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-TSSOP
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 60
AD5280BRUZ50 FAQ
1.How can I place an order for AD5280BRUZ50 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5280BRUZ50 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 AD5280BRUZ50 reliable?
The price and inventory of AD5280BRUZ50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5280BRUZ50 is usually 5 days.
3.What payment methods are accepted for AD5280BRUZ50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5280BRUZ50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5280BRUZ50?
AD5280BRUZ50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5280BRUZ50 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 AD5280BRUZ50?
For technical support, including AD5280BRUZ50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5280BRUZ50 requirements.
6.How does Aetrix verify that AD5280BRUZ50 is sourced from the original manufacturer or authorized distributors?
All AD5280BRUZ50 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 AD5280BRUZ50 meets industry standards.
7.What is the process for return or replacement of AD5280BRUZ50?
All AD5280BRUZ50 units undergo pre-shipment inspection (PSI). If there is an issue with AD5280BRUZ50, 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 AD5280BRUZ50 part is unused and in its original packaging.
Return procedure for AD5280BRUZ50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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