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Analog Devices Inc. AD5242BRUZ10-RL7
- Part No.:
- AD5242BRUZ10-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD5242BRUZ10-RL7.pdf
- Description:
- IC DGT POT 10KOHM 256TAP 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:337
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Product details
Overview
AD5242BRUZ10-RL7 from Analog Devices is a dual-channel, I²C-compatible 256-position digital potentiometer with 10 kΩ end-to-end resistance, 30 ppm/°C temperature coefficient, and operation from 2.7 V to 5.5 V single supply or ±2.7 V dual supply. It replaces mechanical potentiometers in precision gain/offset adjustment circuits, audio volume control, and line impedance matching where programmable resistance with midscale power-on default and shutdown capability is required.
For engineers reviewing the AD5242BRUZ10-RL7 datasheet, AD5242BRUZ10-RL7 pinout, AD5242BRUZ10-RL7 application, or AD5242BRUZ10-RL7 equivalent, key selection considerations include dual-channel matching (±1% RAB), I²C readback support, programmable logic outputs O1/O2, and guaranteed −40°C to +105°C operation in 16-lead TSSOP packaging.
Technical Context
The AD5242BRUZ10-RL7 implements two independent 8-bit digitally controlled resistor ladders, each with 256 tap points between A–W–B terminals. Its I²C interface supports up to four devices on one bus via AD0/AD1 address pins and enables both write (with A/B subaddress, SD shutdown, RS reset, and O1/O2 control) and readback of wiper positions.
It operates in rheostat mode (A–W or B–W) or potentiometer divider mode (A–W–B), with voltage divider temperature coefficient of only 5 ppm/°C due to ratio-metric operation. The internal shutdown function (via SHDN pin or SD bit) disconnects Terminal A and shorts W to B while preserving register contents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit (256 positions): Enables precise 0.39% step resolution across full-scale resistance range. |
| Nominal Resistance | 10 kΩ ±30% at 25°C: Matches standard analog signal conditioning ranges; channel-to-channel matching ±1% ensures balanced dual-channel performance. |
| Tempco | 30 ppm/°C (rheostat), 5 ppm/°C (divider): Ensures stable resistance over temperature in precision biasing and gain-setting applications. |
| Supply Range | 2.7 V to 5.5 V single or ±2.7 V dual: Supports mixed-signal systems with 3.3 V or 5 V logic and bipolar analog stages. |
| I²C Interface | 400 kHz max clock, readback capable: Allows real-time monitoring of wiper position and multi-device configuration without external memory. |
| Wiper Resistance | 60 Ω to 120 Ω: Limits minimum achievable resistance in rheostat mode; requires current limiting below 20 mA at zero-scale. |
| Operating Temp | −40°C to +105°C: Qualified for industrial and automotive under-hood environments without derating. |
Pinout & Package
AD5242BRUZ10-RL7 is housed in a 16-lead TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch), optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | A1, A2 | Fixed end of Channel 1/2 resistor ladder; connects to high-side reference or supply rail in potentiometer mode. |
| 2, 15 | W1, W2 | Digitally controlled wiper output; delivers programmable voltage division or variable resistance to downstream circuitry. |
| 4, 14 | B1, B2 | Fixed end of Channel 1/2 resistor ladder; typically grounded or tied to low-side reference in potentiometer mode. |
| 5 | VDD | Positive supply input; powers internal logic, I²C interface, and resistor ladder biasing. |
| 6 | SHDN | Active-low hardware shutdown: opens A terminal and shorts W to B, reducing current to <1 µA while retaining register state. |
| 7 | SCL | I²C clock input; synchronizes serial data transfer at up to 400 kHz. |
| 8 | SDA | Open-drain bidirectional I²C data line; supports multi-master bus with pull-up requirement. |
| 9, 10 | AD0, AD1 | Hardware address bits; configure one of four unique I²C addresses (0x2C–0x2F) for bus scalability. |
| 11 | DGND | Digital ground reference; must be connected to system ground plane for noise immunity. |
| 12 | VSS | Negative supply input; enables true bipolar operation when used with dual supplies. |
| 13 | O2 | Programmable logic output; driven high/low via I²C instruction byte to control LEDs, switches, or logic gates independently of wiper position. |
| 14 | B2 | See Pin 4 entry - duplicate listing corrected per datasheet Table 6. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel matching | ±1% RAB tolerance between channels enables matched gain/offset tuning in stereo or differential circuits without calibration. |
| Midscale power-on preset | Wipers initialize to code 0x80 at power-up, ensuring predictable startup behavior and eliminating fault recovery sequences. |
| I²C readback capability | Allows firmware to verify wiper position after write operations or during runtime diagnostics-critical for safety-critical or closed-loop systems. |
| Programmable logic outputs O1/O2 | Two independent CMOS outputs (VDD/VSS-rail-to-rail, ±1.6 mA sink/source) eliminate need for external GPIO expanders in compact designs. |
| Self-contained shutdown | SHDN pin or SD bit reduces total supply current to <1 µA while preserving wiper setting-ideal for battery-powered or low-power standby modes. |
Applications
| Audio Volume Control | Instrumentation Gain Adjustment |
|---|---|
|
Use Scenario: Programmable attenuation in headphone amplifiers or line-level audio paths requiring smooth, click-free level changes. IC Role / Device Role / Timing Role: Dual-channel AD5242BRUZ10-RL7 serves as stereo volume control, with independent wiper positioning synchronized via I²C to avoid channel imbalance. Use Value: 256-step resolution enables fine-grained volume control; 5 ppm/°C divider tempco prevents audible drift during thermal cycling. |
Use Scenario: Precision gain scaling in programmable-gain instrumentation amplifiers (PGIAs) for sensor signal conditioning. IC Role / Device Role / Timing Role: AD5242BRUZ10-RL7 configures feedback resistors in op-amp gain networks, enabling software-selectable gains (e.g., ×1, ×10, ×100). Use Value: ±1% channel matching ensures identical gain across differential inputs; midscale power-on avoids transient output spikes at startup. |
| Line Impedance Matching | Programmable Voltage-to-Current Conversion |
|
Use Scenario: Dynamic termination of high-speed communication lines (e.g., RS-485, LVDS) to compensate for trace length variations or connector wear. IC Role / Device Role / Timing Role: AD5242BRUZ10-RL7 acts as digitally adjustable series/parallel termination resistor, reconfigured in-system via I²C during calibration or field updates. Use Value: 10 kΩ nominal value aligns with common telecom standards; 30 ppm/°C tempco maintains impedance stability across operating temperature range. |
Use Scenario: Generating precise, software-tuned current sources for LED drivers, sensor excitation, or DAC output buffering. IC Role / Device Role / Timing Role: AD5242BRUZ10-RL7 sets the gain resistor in a Howland current source or transimpedance amplifier configuration. Use Value: Low wiper resistance (60 Ω) minimizes error in low-current (<1 mA) applications; shutdown mode disables current path without firmware intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5242BRUZ100-RL7 | 100 kΩ nominal resistance (vs. 10 kΩ); same pinout, timing, and feature set. | Better suited for high-impedance bias networks or low-power sensor interfaces where 10 kΩ would load source excessively. | Select when higher resistance is needed to minimize loading on high-Z sources or reduce quiescent current in divider configurations. |
| MAX5487ETE+T | Single-channel, 256-tap, 10 kΩ, SPI interface; no programmable logic outputs or dual-supply support. | Limited to unidirectional control; lacks I²C readback and O1/O2 drive capability-requires external GPIO for auxiliary functions. | Choose for SPI-based systems where bus compatibility outweighs dual-channel and logic-output advantages. |
Compared with AD5242BRUZ100-RL7, the AD5242BRUZ10-RL7 provides lower resistance for higher current drive and reduced thermal noise; versus MAX5487ETE+T, it offers dual-channel matching, I²C readback, and integrated logic outputs-reducing component count in space-constrained designs.
Availability
AD5242BRUZ10-RL7 is available at Aetrix Electronics and suitable for industrial instrumentation, audio subsystems, and communications infrastructure requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AD5242BRUZ10-RL7 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD5242BRUZ10-RL7 belongs to Analog Devices' precision digital potentiometer product line, engineered for applications demanding accurate, repeatable, and temperature-stable resistance control without mechanical wear or manual calibration.
FAQ
What is the maximum operating voltage for AD5242BRUZ10-RL7?
The AD5242BRUZ10-RL7 supports a single-supply range of 2.7 V to 5.5 V or dual-supply operation from ±2.7 V. Absolute maximum ratings specify VDD to GND ≤ +7 V and VSS to GND ≥ −7 V, but sustained operation beyond the recommended supply range may degrade performance or reliability. Always refer to the absolute maximum ratings table in the official datasheet for stress limits.
Does AD5242BRUZ10-RL7 support I²C readback of wiper positions?
Yes, AD5242BRUZ10-RL7 supports full I²C readback of both channel wiper positions. After selecting a channel (RDAC1 or RDAC2) via the A/B bit in the instruction byte during a write cycle, a subsequent read operation retrieves the current 8-bit register value. This enables real-time verification and closed-loop control without external nonvolatile storage.
How does the shutdown function work on AD5242BRUZ10-RL7?
The AD5242BRUZ10-RL7 features dual shutdown control: hardware (SHDN pin, active low) and software (SD bit in instruction byte, active high). Both disconnect Terminal A and short Wiper W to Terminal B, reducing current draw to <1 µA while preserving the stored wiper code. Register contents remain intact, and wiper position resumes immediately upon exit from shutdown.
What is the wiper resistance specification for AD5242BRUZ10-RL7?
The wiper resistance (RW) of AD5242BRUZ10-RL7 is specified as 60 Ω (min) to 120 Ω (max) across temperature. This parasitic resistance appears in series with the programmed resistance in rheostat mode (e.g., RWB = D/256 × 10 kΩ + RW) and must be accounted for in precision applications. At zero-scale (code 0x00), only RW remains-limit current to ≤20 mA to prevent contact degradation.
Can AD5242BRUZ10-RL7 operate with a 3.3 V supply?
Yes, AD5242BRUZ10-RL7 is fully compatible with 3.3 V single-supply operation. Its I²C interface accepts VIH ≥ 0.7 × VDD (≥2.31 V) and VIL ≤ 0.3 × VDD (≤0.99 V), and all DC and dynamic specifications-including 400 kHz I²C speed, 256-step resolution, and −40°C to +105°C operation-are guaranteed across the 2.7 V to 5.5 V range, including 3.3 V.
AD5242BRUZ10-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 2
- Number of Taps:
- 256
- Resistance (Ohms):
- 10k
- Interface:
- I2C
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V, ±2.3V ~ 2.7V
- Features:
- Selectable Address
- Tolerance:
- ±30%
- Temperature Coefficient (Typ):
- 30ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-TSSOP
- Operating Temperature:
- -40°C ~ 105°C
- Resistance - Wiper (Ohms) (Typ):
- 60
AD5242BRUZ10-RL7 FAQ
1.How can I place an order for AD5242BRUZ10-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5242BRUZ10-RL7 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 AD5242BRUZ10-RL7 reliable?
The price and inventory of AD5242BRUZ10-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5242BRUZ10-RL7 is usually 5 days.
3.What payment methods are accepted for AD5242BRUZ10-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5242BRUZ10-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5242BRUZ10-RL7?
AD5242BRUZ10-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5242BRUZ10-RL7 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 AD5242BRUZ10-RL7?
For technical support, including AD5242BRUZ10-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5242BRUZ10-RL7 requirements.
6.How does Aetrix verify that AD5242BRUZ10-RL7 is sourced from the original manufacturer or authorized distributors?
All AD5242BRUZ10-RL7 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 AD5242BRUZ10-RL7 meets industry standards.
7.What is the process for return or replacement of AD5242BRUZ10-RL7?
All AD5242BRUZ10-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD5242BRUZ10-RL7, 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 AD5242BRUZ10-RL7 part is unused and in its original packaging.
Return procedure for AD5242BRUZ10-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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