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Analog Devices Inc. AD5231BRUZ10
- Part No.:
- AD5231BRUZ10
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD5231BRUZ10.pdf
- Description:
- IC DGT POT 10KOHM 1024TP 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:11,144
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Product details
Overview
AD5231BRUZ10 from Analog Devices is a nonvolatile digital potentiometer with 1024-position resolution, 10 kΩ terminal resistance, SPI-compatible serial interface, and EEMEM restore time of 140 µs typ. It replaces mechanical potentiometers in precision gain/offset adjustment circuits requiring stable wiper settings across power cycles.
For engineers reviewing the AD5231BRUZ10 datasheet, AD5231BRUZ10 pinout, AD5231BRUZ10 application, or AD5231BRUZ10 equivalent, key selection criteria include guaranteed monotonic operation, ±6 dB/step log taper support, 28 bytes of user-configurable nonvolatile memory, and operation over −40°C to +85°C in TSSOP-16 package.
Technical Context
The AD5231BRUZ10 implements a 10-bit RDAC structure with scratchpad register and separate EEMEM for persistent storage. Its SPI interface supports CPHA = 0/1 and CPOL = 0/1 modes, enabling compatibility with ADuC8xx, MC68HC11, and similar microcontrollers.
It operates in both rheostat (W–B) and potentiometer divider (A–W–B) configurations, with full monotonicity, 15–100 Ω wiper resistance depending on supply, and voltage divider temperature coefficient of 15 ppm/°C at mid-scale.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 1024 positions (10-bit), enabling fine-grained analog signal tuning with <1 LSB DNL error. |
| Terminal Resistance | 10 kΩ (RAB), defining maximum end-to-end resistance and setting current-handling limits (±2 mA continuous). |
| EEMEM Retention | 100-year data retention at TJ = 55°C, ensuring long-term calibration stability without battery backup. |
| Power Supply Range | 3 V to 5.5 V single-supply or ±2.25 V to ±2.75 V dual-supply, supporting bipolar signal conditioning. |
| Bandwidth | 370 kHz (RAB = 10 kΩ), suitable for audio and low-frequency control loops but not RF applications. |
| THD | 0.045% at 1 kHz (RAB = 10 kΩ), meeting requirements for precision instrumentation signal paths. |
| Wiper Settling Time | 1.2 µs (RAB = 10 kΩ), enabling fast reconfiguration in closed-loop feedback systems. |
Pinout & Package
The AD5231BRUZ10 is housed in a 16-lead TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch), rated for −40°C to +85°C operation and compatible with standard reflow profiles (260°C peak, 20–40 sec).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| O1 | Nonvolatile digital output 1 | User-programmable logic output stored in EEMEM; retains state across power cycles. |
| CLK | SPI clock input | Positive-edge-triggered serial clock; supports up to 50 MHz operation per timing specs. |
| SDI | SPI data input | MSB-first 24-bit command/data stream; accepts instructions, addresses, and wiper values. |
| SDO | SPI data output | Open-drain readback/daisy-chain output; requires external pull-up (1–10 kΩ) for active use. |
| GND | Digital ground reference | Logic ground for all digital I/O; must tie to system PCB common ground. |
| VSS | Negative supply rail | 0 V for single-supply; −2.5 V for dual-supply operation enabling bipolar signal swing. |
| B | RDAC terminal B | Fixed end of resistor string; used as low-side connection in rheostat mode or voltage divider. |
| W | Wiper terminal | Variable tap point; connects to internal switch matrix; wiper resistance ≤100 Ω at 5 V. |
| A | RDAC terminal A | Fixed end of resistor string; used as high-side connection in rheostat mode or voltage divider. |
| VDD | Positive supply rail | 3–5.5 V supply; powers core logic and switch array; supplies up to 40 mA during EEMEM store. |
| WP | Write protect input | Active-low hardware lock; prevents accidental EEMEM writes while allowing PR refresh and instruction 1/8. |
| PR | Preset hardware input | Edge-triggered (rising) override; reloads RDAC from EEMEM without software command. |
| CS | Chip select input | Active-low SPI enable; must remain low for full 24-bit frame; noise immunity critical for reliable decoding. |
| RDY | Ready indicator | Open-drain status flag; pulses high during EEMEM store/restore (25 ms / 140 µs) to synchronize host. |
| O2 | Nonvolatile digital output 2 | Second user-configurable logic output; independent of O1 and stored in same EEMEM space. |
Key Features
| Feature | Design Value |
|---|---|
| Nonvolatile wiper setting | Eliminates need for external EEPROM or MCU supervision; auto-restores on power-up from EEMEM. |
| ±6 dB/step log taper control | Enables exponential gain scaling for audio volume control without external lookup tables or firmware interpolation. |
| 28-byte user EEMEM | Stores calibration coefficients, device ID, or system configuration data alongside wiper settings. |
| Full monotonic operation | Guaranteed −1/+1.25 LSB DNL across temperature, preventing glitches in closed-loop control paths. |
| Hardware preset (PR) pin | Allows immediate wiper reset to stored value via external button or FPGA signal-no SPI transaction required. |
Applications
| Instrumentation Gain Calibration | Programmable Power Supply |
|---|---|
Use Scenario: Precision op-amp gain setting in automated test equipment where factory calibration must persist across field deployments. IC Role / Device Role / Timing Role: Two-terminal rheostat (W–B) configures feedback resistor; wiper position sets exact gain ratio with <0.01% tolerance drift. Use Value: Eliminates manual trimmer replacement and enables remote recalibration via SPI without opening enclosure. | Use Scenario: Adjustable output voltage in lab-grade bench power supplies requiring stable setpoints after AC power loss. IC Role / Device Role / Timing Role: Potentiometer divider (A–W–B) feeds reference voltage to error amplifier; EEMEM retains last-set voltage level. Use Value: Maintains user-selected output (e.g., 12.5 V) across power cycles with no MCU intervention or backup capacitor. |
| Sensor Offset Compensation | Audio Volume Control |
Use Scenario: Nulling thermocouple or strain gauge offset in industrial sensor front-ends operating unattended for years. IC Role / Device Role / Timing Role: Rheostat mode injects adjustable DC bias into differential amplifier input; wiper updated only during calibration. Use Value: 100-year EEMEM retention ensures offset remains valid through product lifetime without maintenance. | Use Scenario: Consumer audio DAC output stage where logarithmic volume response matches human hearing perception. IC Role / Device Role / Timing Role: Potentiometer divider configures gain-setting network; ±6 dB/step commands provide perceptually linear attenuation. Use Value: Hardware-accelerated log taper avoids CPU load and timing jitter associated with software-based lookup tables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5232BRUZ10 | Dual-channel version with identical 10 kΩ RAB, same EEMEM size, but adds second independent RDAC and shared SPI bus. | Required when two independent programmable resistors are needed in same footprint (e.g., stereo audio, dual-sensor bias). | Select AD5232BRUZ10 only if dual-channel functionality is essential; otherwise AD5231BRUZ10 offers lower cost and simpler layout. |
| MCP41HV51-103 | 10 kΩ, SPI interface, but volatile-only (no EEMEM); requires external MCU to reload wiper on power-up. | Suitable for applications where wiper setting changes frequently and persistence is unnecessary (e.g., real-time tuning interfaces). | Choose MCP41HV51-103 only if nonvolatility is not required and system already manages wiper state in firmware. |
Compared with AD5232BRUZ10, the AD5231BRUZ10 reduces board area and cost for single-resistor applications; compared with MCP41HV51-103, it eliminates MCU dependency for power-cycle retention-critical for standalone calibration systems.
Availability
AD5231BRUZ10 is available at Aetrix Electronics and suitable for instrumentation gain calibration, programmable power supplies, sensor offset compensation, and audio volume control requiring stable component supply across extended industrial temperature range.
Supply support for AD5231BRUZ10 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets.
The AD5231BRUZ10 belongs to Analog Devices' nonvolatile digital potentiometer product line, engineered for applications demanding permanent wiper storage, monotonic performance, and robust SPI control in harsh environments.
FAQ
What is the terminal resistance tolerance of the AD5231BRUZ10?
The AD5231BRUZ10 has a nominal terminal resistance (RAB) of 10 kΩ with a tolerance of −40% to +20% across temperature and process variation. This wide tolerance reflects the inherent variability of thin-film resistor arrays and requires system-level calibration for absolute resistance accuracy. The AD5231BRUZ10 maintains monotonicity and repeatability regardless of initial RAB value.
Does the AD5231BRUZ10 support dual-supply operation?
Yes, the AD5231BRUZ10 supports dual-supply operation with VDD = +2.5 V and VSS = −2.5 V, enabling true bipolar signal adjustment across the A–B terminals. In this mode, VA, VB, and VW can swing from −2.5 V to +2.5 V relative to GND, making the AD5231BRUZ10 suitable for AC-coupled instrumentation and audio applications requiring ground-referenced signals.
How does the PR pin function on the AD5231BRUZ10?
The PR (Preset) pin on the AD5231BRUZ10 is an asynchronous hardware input that triggers immediate restoration of the RDAC wiper from EEMEM on its rising edge. Unlike software-based restore commands, PR requires no SPI transaction and executes in 70 µs. This allows field technicians or safety circuits to force a known-good wiper position without MCU involvement-critical for fail-safe recalibration in AD5231BRUZ10-based systems.
Can the AD5231BRUZ10 be used in daisy-chain configuration?
Yes, the AD5231BRUZ10 supports daisy-chaining via its open-drain SDO pin, which shifts out previously loaded SDI data after 24 or 25 clock cycles. To daisy-chain multiple AD5231BRUZ10 devices, connect SDO of one unit to SDI of the next and keep CS low until all 24-bit frames are clocked. Each additional device increases total clock count by 24 bits, and pull-up resistors (1–10 kΩ) are required on each SDO line.
What is the maximum current rating for the wiper terminal (W) of the AD5231BRUZ10?
The wiper terminal (W) of the AD5231BRUZ10 is rated for ±2 mA continuous current and ±20 mA intermittent current, as specified in Absolute Maximum Ratings. Exceeding these limits risks switch degradation or permanent damage. For applications requiring higher current (e.g., driving LEDs), the AD5231BRUZ10 must be buffered with an op-amp or transistor stage-its internal CMOS switches are optimized for signal-level control, not power delivery.
AD5231BRUZ10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-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:
- 1024
- Resistance (Ohms):
- 10k
- Interface:
- SPI
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V, ±2.25V ~ 2.75V
- Features:
- Cascade Pin
- Tolerance:
- -40%, +20%
- Temperature Coefficient (Typ):
- 600ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-TSSOP
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 50
AD5231BRUZ10 FAQ
1.How can I place an order for AD5231BRUZ10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5231BRUZ10 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 AD5231BRUZ10 reliable?
The price and inventory of AD5231BRUZ10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5231BRUZ10 is usually 5 days.
3.What payment methods are accepted for AD5231BRUZ10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5231BRUZ10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5231BRUZ10?
AD5231BRUZ10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5231BRUZ10 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 AD5231BRUZ10?
For technical support, including AD5231BRUZ10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5231BRUZ10 requirements.
6.How does Aetrix verify that AD5231BRUZ10 is sourced from the original manufacturer or authorized distributors?
All AD5231BRUZ10 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 AD5231BRUZ10 meets industry standards.
7.What is the process for return or replacement of AD5231BRUZ10?
All AD5231BRUZ10 units undergo pre-shipment inspection (PSI). If there is an issue with AD5231BRUZ10, 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 AD5231BRUZ10 part is unused and in its original packaging.
Return procedure for AD5231BRUZ10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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