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Analog Devices Inc. AD5272BRMZ-20-RL7
- Part No.:
- AD5272BRMZ-20-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD5272BRMZ-20-RL7.pdf
- Description:
- IC DGT POT 20KOHM 1024TAP 10MSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AD5272BRMZ-20-RL7 from Analog Devices is a single-channel, 1024-position digital rheostat with 20 kΩ nominal resistance, ±1% end-to-end resistor tolerance error, I²C interface, and 50-times programmable (50-TP) nonvolatile wiper memory. It operates from 2.7 V to 5.5 V single supply or ±2.5 V dual supply and is used in precision gain control of op-amp circuits across industrial temperature range (−40°C to +125°C).
For engineers reviewing the AD5272BRMZ-20-RL7 datasheet, AD5272BRMZ-20-RL7 pinout, AD5272BRMZ-20-RL7 application, or AD5272BRMZ-20-RL7 equivalent, key selection considerations include guaranteed 1% resistor tolerance in R-Perf mode, 5 ppm/°C rheostat tempco, 10-bit resolution, I²C fast-mode (400 kHz) support, and LFCSP-10 package compatibility for space-constrained analog calibration designs.
Technical Context
The AD5272BRMZ-20-RL7 implements a segmented resistor ladder architecture with digitally controlled wiper positioning via an I²C-compatible 2-wire interface. Its RDAC register serves as a volatile scratchpad, enabling unlimited real-time adjustments before permanent storage into 50-TP memory - a one-time fuse-based programming mechanism requiring ~350 ms per write.
R-Perf mode restricts valid wiper codes (e.g., 0x078–0x3FF for 20 kΩ at |VDD−VSS| ≥ 4.5 V) to guarantee ≤±1% absolute resistance tolerance; outside this range, tolerance degrades to ±15%. Dual-supply operation (±2.5 V) enables bipolar signal adjustment with ground-referenced terminals A and W, supporting ac-coupled instrumentation applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10 bits - supports 1024 discrete wiper positions for fine-grained analog tuning |
| Nominal Resistance | 20 kΩ - fixed end-to-end resistance value defining scaling in gain/offset circuits |
| Resistor Tolerance Error | ±1% (R-Perf mode) - eliminates need for external calibration in open-loop rheostat applications |
| Temperature Coefficient | 5 ppm/°C - ensures stable resistance over −40°C to +125°C, critical for sensor calibration |
| Wiper Memory | 50-TP (50-times programmable) - stores one factory-set or user-defined wiper position permanently |
| Supply Range | 2.7 V to 5.5 V single supply or ±2.5 V dual supply - supports both unipolar and bipolar analog signal paths |
| I²C Interface | Standard (100 kHz) and fast mode (400 kHz) - compatible with mainstream microcontroller peripherals |
| Package | LFCSP-10 (3 mm × 3 mm × 0.8 mm) - low-profile, thermally enhanced package for high-density PCBs |
Pinout & Package
AD5272BRMZ-20-RL7 uses a 10-lead, 3 mm × 3 mm × 0.8 mm thin LFCSP package with exposed pad (EPAD), optimized for thermal performance (θJA = 58.4°C/W) and board space efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive power supply | Must be decoupled with 0.1 µF ceramic + 10 µF bulk capacitor; supports 2.7–5.5 V operation |
| A | RDAC terminal A | One end of 20 kΩ resistor ladder; voltage range: VSS ≤ VA ≤ VDD |
| W | Wiper terminal | Adjustable tap point; enables variable resistance between A and W or W and B (if used) |
| VSS | Negative supply / GND reference | Connect to 0 V for single supply; supports −2.5 V for dual-supply bipolar operation |
| EXT_CAP | External capacitor connection | Requires 1 µF ≥7 V capacitor to VSS for internal fuse programming stability |
| GND | Logic ground reference | Separate from power ground in mixed-signal layouts to minimize noise coupling |
| RESET | Hardware reset input | Active-low signal that reloads RDAC register from 50-TP memory on power-up or command |
| SDA | I²C bidirectional data line | Open-drain; requires external pull-up to VDD; supports readback of wiper and memory contents |
| SCL | I²C clock input | Drives serial interface timing; supports standard (100 kHz) and fast (400 kHz) modes |
| ADDR | I²C address LSB input | Configures two least-significant address bits (A1/A0); enables up to three devices on one bus |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed 1% resistor tolerance | Validated across temperature and supply voltage in R-Perf mode - enables direct replacement of mechanical trimmers without system-level recalibration |
| 50-TP nonvolatile memory | One-time permanent wiper storage with 350 ms program time - replaces epoxy-setting of mechanical potentiometers in production calibration |
| 5 ppm/°C rheostat tempco | Low drift over −40°C to +125°C - maintains accuracy in automotive and industrial environments without compensation circuitry |
| I²C wiper setting readback | Real-time verification of programmed resistance value - supports closed-loop calibration and fault detection in safety-critical systems |
| Dual-supply operation (±2.5 V) | Enables ground-referenced bipolar signal adjustment - simplifies ac-coupled filter and offset control in instrumentation front-ends |
| Low power consumption | 1 µA typical supply current - suitable for battery-powered portable test equipment and sensor nodes |
Applications
| Op-Amp Gain Control | Sensor Calibration |
|---|---|
|
Use Scenario: Programmable gain stage in a precision analog front-end for strain gauge or RTD measurements. IC Role / Device Role / Timing Role: Digital rheostat configured in variable resistance mode between op-amp feedback path and inverting input. Use Value: Enables field-updatable gain scaling without hardware change; 1% tolerance avoids post-calibration trimming. |
Use Scenario: Factory calibration of offset and sensitivity in MEMS pressure sensors prior to module sealing. IC Role / Device Role / Timing Role: Precision resistor element in bridge-nulling or reference-voltage-adjustment circuit. Use Value: 50-TP memory retains calibrated values across product lifetime; 5 ppm/°C tempco ensures long-term stability. |
| Programmable Power Supply | Instrumentation Offset Adjustment |
|
Use Scenario: Output voltage setpoint control in a digitally adjustable lab bench power supply. IC Role / Device Role / Timing Role: Rheostat in feedback divider of DC-DC converter error amplifier. Use Value: I²C readback allows host MCU to verify and log actual output resistance, improving traceability and compliance reporting. |
Use Scenario: Fine-tuning of zero-point offset in medical ECG amplifier stages during final test. IC Role / Device Role / Timing Role: Variable resistance in op-amp summing junction for dc bias injection. Use Value: 10-bit resolution provides <20 Ω step size at 20 kΩ - sufficient for sub-mV offset correction in 24-bit ADC systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital rheostat applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5274BRMZ-20-RL7 | 8-bit resolution (256 positions), same 20 kΩ nominal resistance and 50-TP memory | Lower resolution limits fine-tuning capability in high-precision gain control loops | Select when 256-step granularity suffices and cost reduction is prioritized over 10-bit precision |
| MCP45HV51-203E/MS | 10-bit, 20 kΩ, SPI interface, no 50-TP memory - uses EEPROM instead | Lacks guaranteed 1% tolerance; typical end-to-end tolerance ±20%; higher wiper resistance (~120 Ω) | Choose for SPI-based systems where nonvolatile memory rewrite endurance (>1M cycles) matters more than absolute tolerance |
Compared with AD5272BRMZ-20-RL7, AD5274BRMZ-20-RL7 trades resolution for lower cost and identical packaging, while MCP45HV51-203E/MS offers SPI compatibility and EEPROM reprogrammability but sacrifices guaranteed 1% tolerance and low tempco - making AD5272BRMZ-20-RL7 optimal for metrology-grade calibration where absolute resistance accuracy is non-negotiable.
Availability
AD5272BRMZ-20-RL7 is available at Aetrix Electronics and suitable for precision instrumentation, sensor calibration, and programmable power supply designs requiring stable component supply, long-term parameter consistency, and industrial temperature operation.
Supply support for AD5272BRMZ-20-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The AD5272/AD5274 family was designed specifically for replacing mechanical potentiometers in high-accuracy analog tuning applications - emphasizing guaranteed resistor tolerance, nonvolatile memory integrity, and robust operation across extended temperature ranges.
FAQ
What is the guaranteed resistor tolerance of AD5272BRMZ-20-RL7, and under what conditions does it apply?
The AD5272BRMZ-20-RL7 guarantees ±1% end-to-end resistor tolerance in R-Perf mode, which is active only for specific wiper code ranges (e.g., 0x078–0x3FF at |VDD−VSS| ≥ 4.5 V). Outside this range, tolerance degrades to ±15%. This specification is validated across −40°C to +125°C and enables open-loop use without system-level trimming. The AD5272BRMZ-20-RL7 datasheet defines exact code boundaries per supply voltage and resistance value in Tables 2 and 3.
Does AD5272BRMZ-20-RL7 support dual-supply operation, and how is it implemented?
Yes, AD5272BRMZ-20-RL7 supports dual-supply operation from ±2.5 V to ±2.75 V, enabling ground-referenced bipolar signal adjustment. Terminals A and W have no polarity restrictions relative to each other, allowing ac-coupled configurations. VSS is connected to the negative rail, and VDD to the positive rail; GND remains the logic reference. This mode is explicitly characterized in the Electrical Characteristics tables and supports applications like programmable ac filters and offset control in instrumentation amplifiers.
How does the 50-TP memory function in AD5272BRMZ-20-RL7, and what is its programming lifetime?
The 50-TP memory in AD5272BRMZ-20-RL7 uses a fuse-based one-time programming mechanism: issuing a store command permanently freezes the current wiper position, requiring ~350 ms to complete. It supports exactly 50 independent programming events - not 50 writes per location, but 50 total opportunities to set the value. Once programmed, the wiper automatically loads from 50-TP memory at power-up. No external voltage is needed for programming, and the AD5272BRMZ-20-RL7 includes built-in EXT_CAP filtering to ensure reliable fuse blow.
What package type and thermal characteristics does AD5272BRMZ-20-RL7 use?
AD5272BRMZ-20-RL7 is packaged in a 10-lead LFCSP (3 mm × 3 mm × 0.8 mm) with exposed pad, offering θJA = 58.4°C/W in JEDEC natural convection. This compact, thermally efficient package supports high-density layouts and dissipates heat effectively during sustained operation. The exposed pad may be left floating or tied to VSS for improved thermal performance. Pin compatibility and footprint match other LFCSP-10 digital potentiometers in Analog Devices' portfolio.
Can AD5272BRMZ-20-RL7 be used in I²C multi-drop configurations, and how is addressing handled?
Yes, AD5272BRMZ-20-RL7 supports multi-drop I²C buses via the ADDR pin, which sets the two least-significant bits (A1/A0) of its 7-bit target address (fixed MSBs = 01011). With ADDR tied to GND, VDD, or left unconnected (NC), up to three AD5272BRMZ-20-RL7 devices can share one bus. Address mapping is defined in Table 11 of the datasheet; no external address jumpers or configuration registers are required - addressing is purely hardware-configured at the pin level.
AD5272BRMZ-20-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Rheostat
- Number of Circuits:
- 1
- Number of Taps:
- 1024
- Resistance (Ohms):
- 20k
- Interface:
- I2C
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V, ±2.5V ~ 2.75V
- Features:
- Selectable Address
- Tolerance:
- ±1%
- Temperature Coefficient (Typ):
- 5ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-MSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 35
AD5272BRMZ-20-RL7 FAQ
1.How can I place an order for AD5272BRMZ-20-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5272BRMZ-20-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 AD5272BRMZ-20-RL7 reliable?
The price and inventory of AD5272BRMZ-20-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5272BRMZ-20-RL7 is usually 5 days.
3.What payment methods are accepted for AD5272BRMZ-20-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5272BRMZ-20-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5272BRMZ-20-RL7?
AD5272BRMZ-20-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5272BRMZ-20-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 AD5272BRMZ-20-RL7?
For technical support, including AD5272BRMZ-20-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5272BRMZ-20-RL7 requirements.
6.How does Aetrix verify that AD5272BRMZ-20-RL7 is sourced from the original manufacturer or authorized distributors?
All AD5272BRMZ-20-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 AD5272BRMZ-20-RL7 meets industry standards.
7.What is the process for return or replacement of AD5272BRMZ-20-RL7?
All AD5272BRMZ-20-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD5272BRMZ-20-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 AD5272BRMZ-20-RL7 part is unused and in its original packaging.
Return procedure for AD5272BRMZ-20-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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