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Analog Devices Inc. AD5243BRMZ2.5
- Part No.:
- AD5243BRMZ2.5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD5243BRMZ2.5.pdf
- Description:
- IC DGT POT 2.5KOHM 256TAP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:570
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Product details
Overview
AD5243BRMZ2.5 from Analog Devices is a dual-channel, 256-position I²C-compatible digital potentiometer in a 10-lead MSOP package, offering 2.5 kΩ end-to-end resistance, ±0.1 LSB typical DNL in potentiometer mode, and 35 ppm/°C temperature coefficient. It replaces mechanical trimmers in precision gain control, sensor offset adjustment, and factory-set calibration circuits.
For engineers reviewing the AD5243BRMZ2.5 datasheet, AD5243BRMZ2.5 pinout, AD5243BRMZ2.5 application, or AD5243BRMZ2.5 equivalent, key selection criteria include guaranteed monotonicity, midscale power-on preset, fast 1 µs wiper settling time, low 6 µA supply current, and compatibility with 2.7 V to 5.5 V single-supply systems.
Technical Context
The AD5243BRMZ2.5 implements two independent 8-bit RDAC ladders with wiper registers accessible via standard I²C interface (up to 400 kHz), supporting both rheostat (2-terminal) and potentiometer (3-terminal) configurations. Each channel features internal ESD protection on all resistor terminals and digital pins.
Its architecture delivers linear resistance vs. code behavior with R-DNL ≤ ±0.1 LSB (2.5 kΩ version), voltage-divider temperature coefficient of 15 ppm/°C, and full read/write capability of wiper registers-enabling dynamic recalibration without hardware modification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-end resistance | 2.5 kΩ - defines maximum adjustable resistance range per channel for biasing and gain-setting applications |
| Resolution | 256 positions (8-bit) - enables fine-grained analog tuning with 0.39% step resolution across full scale |
| Temperature coefficient | 35 ppm/°C - ensures stable resistance over −40°C to +125°C operating range, critical for automotive and industrial environments |
| Wiper settling time | 1 µs (±1 LSB) - supports high-speed closed-loop adjustments in real-time control systems |
| Supply current | 6 µA max - enables use in battery-powered instrumentation and portable sensor nodes |
| I²C clock frequency | Up to 400 kHz - compatible with standard-mode I²C controllers without timing constraints |
| Differential nonlinearity | ±0.1 LSB typical - guarantees monotonic response essential for precision calibration and feedback loops |
Pinout & Package
AD5243BRMZ2.5 uses a compact 10-lead MSOP package (3 mm × 4.9 mm), optimized for space-constrained PCB layouts while maintaining thermal performance (θJA = 230°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| B1 | Channel 1 resistor terminal B | Low-side connection point for rheostat or potentiometer configuration; referenced to GND in divider mode |
| A1 | Channel 1 resistor terminal A | High-side connection point; accepts up to VDD potential; used with B1 and W1 to form 3-terminal potentiometer |
| W2 | Channel 2 wiper output | Analog output node for Channel 2; resistance between W2 and A2/B2 varies digitally with I²C command |
| GND | Digital ground reference | Common return for I²C interface and internal logic; must be tied to system ground plane for noise immunity |
| VDD | Positive power supply | Supplies 2.7 V–5.5 V to internal logic and RDAC switches; powers ESD protection diodes on resistor terminals |
| SCL | I²C serial clock input | Positive-edge triggered; synchronizes data transfer; requires external pull-up to VDD per I²C specification |
| SDA | I²C bidirectional data line | Open-drain interface; shares bus with other I²C devices; supports readback of wiper register contents |
| A2 | Channel 2 resistor terminal A | Independent high-side terminal for second potentiometer channel; electrically isolated from A1 |
| B2 | Channel 2 resistor terminal B | Independent low-side terminal; enables dual-channel simultaneous adjustment without crosstalk |
| W1 | Channel 1 wiper output | Primary analog output for Channel 1; settles within 1 µs after I²C write; drives low-impedance loads up to ±5 mA |
Key Features
| Feature | Design Value |
|---|---|
| Power-on preset to midscale | Automatically initializes both wipers to code 0x80 at power-up, eliminating startup glitches and enabling deterministic system boot behavior |
| Full wiper register read/write | Allows host microcontroller to verify settings, implement redundancy checks, and recover from transient errors without recalibration |
| Low temperature coefficient (35 ppm/°C) | Minimizes drift-induced gain error in transducer signal conditioning over wide ambient temperature ranges |
| Guaranteed monotonic operation | Ensures no step reversals during wiper sweeps-critical for closed-loop stability in automatic gain control circuits |
| Compact 3 mm × 4.9 mm MSOP package | Reduces PCB area by >60% versus SOIC alternatives while maintaining thermal robustness for high-density designs |
Applications
| RF Amplifier Biasing | Transducer Offset Calibration |
|---|---|
Use Scenario: Setting precise DC bias points for GaAs FET or LDMOS power amplifier stages in wireless infrastructure equipment. IC Role / Device Role / Timing Role: Dual-channel AD5243BRMZ2.5 configures independent gate voltage references for push-pull amplifier pairs using potentiometer mode. Use Value: Enables factory-trimmed bias stability across temperature (±15 ppm/°C voltage-divider TC) and eliminates manual trimming labor. | Use Scenario: Compensating zero-point drift in pressure, temperature, and optical sensors before ADC digitization. IC Role / Device Role / Timing Role: AD5243BRMZ2.5 acts as programmable offset injection network in front-end signal conditioning amplifiers. Use Value: Achieves <±0.1 LSB DNL accuracy for sub-mV offset correction, improving sensor measurement repeatability over lifetime. |
| Factory PCB Trim Replacement | Gain Control in Programmable Gain Amplifiers |
Use Scenario: Replacing mechanical trimpots on production-line calibrated modules where field adjustment is prohibited. IC Role / Device Role / Timing Role: AD5243BRMZ2.5 stores permanent calibration values in nonvolatile EEPROM-equivalent latch state during final test. Use Value: Eliminates mechanical wear, humidity sensitivity, and vibration-induced drift inherent in analog trimmers. | Use Scenario: Dynamically adjusting closed-loop gain in medical instrumentation amplifiers during different measurement modes. IC Role / Device Role / Timing Role: AD5243BRMZ2.5 functions as digitally controlled feedback resistor in op-amp gain networks. Use Value: Provides 256-step resolution with 1 µs settling time, enabling rapid gain switching without signal interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5243BRMZ10 | Same dual-channel architecture and pinout, but 10 kΩ end-to-end resistance; higher wiper resistance (200 Ω typical) and lower bandwidth (600 kHz @ code 0x80) | Better suited for high-impedance voltage-divider applications; less ideal for low-resistance current-sensing rheostat use | Select AD5243BRMZ10 when circuit requires higher impedance matching or reduced loading on source signals |
| MCP42050-I/SL | Microchip dual 256-tap potentiometer; SPI interface only; 50 kΩ nominal resistance; no power-on midscale preset; wider supply range (2.7 V–5.5 V) | Lacks I²C compatibility and guaranteed monotonicity spec; requires external reset or initialization firmware | Choose MCP42050-I/SL only if SPI is preferred and system can accommodate custom startup sequencing |
Compared with AD5243BRMZ10 and MCP42050-I/SL, the AD5243BRMZ2.5 offers optimal trade-off for low-resistance, fast-settling, I²C-controlled applications-especially where board space, power budget, and deterministic power-up behavior are critical.
Availability
AD5243BRMZ2.5 is available at Aetrix Electronics and suitable for RF amplifier biasing, transducer calibration, and factory-programmed PCB trimming requiring stable component supply and long-term parametric consistency.
Supply support for AD5243BRMZ2.5 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.
The AD5243 product line delivers precision, low-power, I²C-compatible digital potentiometers designed specifically for replacing mechanical trimmers in factory-calibrated and field-adjustable analog signal paths.
FAQ
What is the power-on behavior of the AD5243BRMZ2.5?
The AD5243BRMZ2.5 features an internal power-on preset that automatically initializes both wiper registers to midscale (code 0x80) upon VDD ramp-up. This deterministic startup eliminates undefined output states and ensures repeatable initial resistance values without requiring host controller intervention. The behavior is hardwired and does not depend on I²C communication or external configuration.
Does the AD5243BRMZ2.5 support readback of wiper position?
Yes, the AD5243BRMZ2.5 supports full readback of both wiper registers via its I²C interface. After writing a new code, the host controller can issue a read command to retrieve the currently loaded 8-bit value for verification or diagnostic logging. This capability enables closed-loop calibration routines and fault detection in safety-critical systems using AD5243BRMZ2.5.
What is the maximum current rating for the wiper terminals of the AD5243BRMZ2.5?
The AD5243BRMZ2.5 wiper terminals support ±5 mA continuous current and ±20 mA pulsed current. Exceeding these limits risks degradation of the internal CMOS switch contacts, especially at zero-scale (code 0x00) where wiper resistance is minimal (~320 Ω). For sustained operation, design must ensure voltage across W–B or W–A remains within GND–VDD bounds and current stays below 5 mA.
Can the AD5243BRMZ2.5 operate with a 3.3 V supply?
Yes, the AD5243BRMZ2.5 operates fully across 2.7 V to 5.5 V, including standard 3.3 V systems. Its I²C interface meets SMBus specifications with VIH = 2.1 V and VIL = 0.6 V at VDD = 3 V, ensuring reliable communication with 3.3 V microcontrollers. Supply current remains under 6 µA, and key specs-including DNL, INL, and settling time-are guaranteed across this range.
How does the AD5243BRMZ2.5 handle voltage polarity on resistor terminals?
The AD5243BRMZ2.5 allows bidirectional voltage application across A–B, A–W, and B–W terminals-unlike conventional potentiometers constrained by supply polarity. As long as voltages remain within GND to VDD, the device functions correctly in both rheostat and potentiometer modes. This flexibility supports AC-coupled signal paths and bipolar sensor interfaces without external level-shifting circuitry.
AD5243BRMZ2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 2
- Number of Taps:
- 256
- Resistance (Ohms):
- 2.5k
- Interface:
- I2C
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- -
- Tolerance:
- -20%, +55%
- Temperature Coefficient (Typ):
- 35ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-MSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 160
AD5243BRMZ2.5 FAQ
1.How can I place an order for AD5243BRMZ2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5243BRMZ2.5 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 AD5243BRMZ2.5 reliable?
The price and inventory of AD5243BRMZ2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5243BRMZ2.5 is usually 5 days.
3.What payment methods are accepted for AD5243BRMZ2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5243BRMZ2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5243BRMZ2.5?
AD5243BRMZ2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5243BRMZ2.5 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 AD5243BRMZ2.5?
For technical support, including AD5243BRMZ2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5243BRMZ2.5 requirements.
6.How does Aetrix verify that AD5243BRMZ2.5 is sourced from the original manufacturer or authorized distributors?
All AD5243BRMZ2.5 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 AD5243BRMZ2.5 meets industry standards.
7.What is the process for return or replacement of AD5243BRMZ2.5?
All AD5243BRMZ2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AD5243BRMZ2.5, 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 AD5243BRMZ2.5 part is unused and in its original packaging.
Return procedure for AD5243BRMZ2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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