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Analog Devices Inc. AD5272BRMZ-50-RL7
- Part No.:
- AD5272BRMZ-50-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD5272BRMZ-50-RL7.pdf
- Description:
- IC DGT POT 50KOHM 1024TAP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,746
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Product details
Overview
AD5272BRMZ-50-RL7 from Analog Devices is a single-channel, 1024-position digital rheostat with ±1% end-to-end resistor tolerance, 50-times programmable (50-TP) nonvolatile wiper memory, and I²C-compatible interface. It features 50 kΩ nominal resistance, 5 ppm/°C temperature coefficient in rheostat mode, and operates from 2.7 V to 5.5 V single supply or ±2.5 V dual supply - used for precision gain control in instrumentation amplifiers and sensor calibration circuits.
For engineers reviewing the AD5272BRMZ-50-RL7 datasheet, AD5272BRMZ-50-RL7 pinout, AD5272BRMZ-50-RL7 application, or AD5272BRMZ-50-RL7 equivalent, key selection considerations include guaranteed 1% resistor tolerance across code range, 50-TP permanent wiper storage without external programming voltage, I²C address configurability via ADDR pin, and operation over −40°C to +125°C industrial temperature range.
Technical Context
The AD5272BRMZ-50-RL7 implements a segmented resistor ladder architecture with digitally controlled wiper switching, enabling precise analog resistance adjustment. Its RDAC register serves as volatile scratchpad memory, while the 50-TP fuse-based memory permanently stores one wiper position after ~350 ms programming time.
It supports standard (100 kHz) and fast (400 kHz) I²C modes with 7-bit addressing (five MSBs fixed as 01011, two LSBs set by ADDR pin), and includes hardware RESET (active-low) to reload the 50-TP value at power-up or on demand. Dual-supply operation (±2.5 V) enables bipolar signal handling with ground-referenced adjustment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10 bits - enables 1024 discrete resistance steps for fine-grained analog tuning. |
| Nominal Resistance | 50 kΩ - defines full-scale end-to-end resistance; sets current/voltage scaling in gain and calibration circuits. |
| Resistor Tolerance | ±1% - guarantees absolute resistance accuracy without post-manufacturing calibration in open-loop applications. |
| Temperature Coefficient | 5 ppm/°C - ensures stable resistance over −40°C to +125°C, critical for high-precision sensor front-ends. |
| Supply Range | 2.7 V to 5.5 V (single) or ±2.5 V (bipolar) - supports both low-voltage embedded systems and AC-coupled instrumentation. |
| I²C Interface | Standard/fast mode (100/400 kHz) - enables direct connection to microcontrollers without protocol translation or level shifting. |
| Wiper Memory | 50-TP nonvolatile - stores one calibrated wiper setting permanently; no battery or EEPROM required. |
Pinout & Package
AD5272BRMZ-50-RL7 uses a 10-lead LFCSP package (3 mm × 3 mm × 0.8 mm) with exposed pad. This thermally enhanced, space-constrained package supports high-density PCB layouts and industrial temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive power supply | Must be decoupled with 0.1 µF ceramic + 10 µF bulk capacitor; powers internal logic and switches. |
| A | RDAC terminal A | One end of 50 kΩ resistor ladder; voltage range limited to VSS ≤ VA ≤ VDD. |
| W | Wiper output | Adjustable tap point; delivers programmable resistance between A and W terminals. |
| VSS | Negative supply / GND reference | Connect to 0 V for single supply; supports ±2.5 V dual supply for bipolar signal operation. |
| EXT_CAP | External capacitor connection | Requires 1 µF ≥7 V capacitor to VSS for internal charge pump stability during 50-TP programming. |
| GND | Logic ground reference | Separate from power ground in mixed-signal designs to minimize digital noise coupling. |
| RESET | Hardware reset input | Active-low signal that reloads RDAC register from 50-TP memory; tie to VDD if unused. |
| SDA | I²C bidirectional data line | Open-drain; requires external pull-up resistor; supports readback of RDAC and 50-TP values. |
| SCL | I²C clock input | Drives serial interface timing; compatible with standard and fast-mode I²C controllers. |
| ADDR | I²C address LSB input | Configures two least-significant address bits (A1/A0); enables up to three devices on same bus. |
Key Features
| Feature | Design Value |
|---|---|
| 1% end-to-end resistor tolerance | Eliminates need for system-level trimming in open-loop gain control and sensor offset calibration. |
| 50-TP nonvolatile memory | Enables one-time permanent wiper setting without external programming voltage or EEPROM controller. |
| Rheostat-mode tempco: 5 ppm/°C | Maintains resistance stability across full industrial temperature range, reducing drift-induced errors. |
| I²C address configurability (3 options) | Allows stacking of multiple AD5272 units on shared bus without address conflict or software remapping. |
| Power-on auto-refresh from 50-TP | Guarantees known, calibrated resistance at startup - essential for fail-safe analog subsystems. |
Applications
| Instrumentation Gain Control | Sensor Offset Calibration |
|---|---|
|
Use Scenario: Programmable gain stage in a precision analog front-end for strain gauge or RTD measurement. IC Role / Device Role / Timing Role: Rheostat connected between op-amp feedback and inverting input to set closed-loop gain. Use Value: ±1% resistor tolerance ensures gain error remains <±0.5% across temperature, eliminating factory calibration. |
Use Scenario: Two-point calibration of thermocouple amplifier output to compensate for cold-junction offset. IC Role / Device Role / Timing Role: Rheostat in summing junction to inject programmable DC offset voltage. Use Value: 50-TP memory retains calibrated offset value across power cycles, ensuring repeatable zero-point alignment. |
| Programmable Power Supply | Op-Amp Variable Feedback |
|
Use Scenario: Adjustable output voltage in a lab-grade bench power supply using TL431-based feedback loop. IC Role / Device Role / Timing Role: Rheostat replacing mechanical potentiometer in TL431 reference divider network. Use Value: I²C interface enables remote voltage programming via MCU; 5 ppm/°C tempco maintains setpoint accuracy over ambient changes. |
Use Scenario: Dynamic bandwidth control in active filter design where gain affects cutoff frequency. IC Role / Device Role / Timing Role: Rheostat in op-amp non-inverting configuration to adjust signal amplitude pre-filtering. Use Value: 1024-step resolution allows <0.1% gain increments, supporting fine-tuned frequency response shaping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital rheostat applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5274BRMZ-50-RL7 | 8-bit resolution (256 positions), identical 50 kΩ nominal resistance, ±1% tolerance, same 50-TP memory and I²C interface. | Limited to coarser gain/offset adjustments; lower code density reduces precision in fine-tuning applications. | Select when 256-step resolution suffices and cost sensitivity outweighs need for 1024-step granularity. |
| MAX5487ETE+T | 10-bit resolution, 50 kΩ, but only volatile memory (no nonvolatile storage); requires external MCU to restore settings at power-up. | Not suitable for unattended or safety-critical systems requiring guaranteed startup state without host intervention. | Choose only when full system control resides in host MCU and 50-TP persistence is unnecessary. |
Compared with AD5272BRMZ-50-RL7, AD5274BRMZ-50-RL7 trades resolution for lower cost and smaller footprint, while MAX5487ETE+T lacks persistent wiper storage - making AD5272BRMZ-50-RL7 uniquely suited for autonomous, calibration-critical analog subsystems.
Availability
AD5272BRMZ-50-RL7 is available at Aetrix Electronics and suitable for instrumentation gain control, sensor calibration, programmable power supplies, and op-amp feedback networks requiring stable component supply across extended temperature and long product lifecycles.
Supply support for AD5272BRMZ-50-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 is part of Analog Devices' precision digital potentiometer family, designed specifically for replacing mechanical trimmers in high-accuracy, maintenance-free analog signal conditioning systems.
FAQ
What is the guaranteed resistor tolerance for AD5272BRMZ-50-RL7 across its operating temperature range?
The AD5272BRMZ-50-RL7 guarantees ±1% end-to-end resistor tolerance over −40°C to +125°C when operated in Resistor Performance (R-Perf) mode. This specification applies to codes within defined R-Perf ranges (e.g., 0x078–0x3FF for |VDD−VSS| = 4.5 V–5.5 V), and is validated per Table 2 and Table 3 in the Rev. G datasheet. The tolerance holds without recalibration, enabling open-loop use in precision instrumentation.
Does AD5272BRMZ-50-RL7 require an external programming voltage to store wiper settings in 50-TP memory?
No, AD5272BRMZ-50-RL7 does not require an external programming voltage. Its 50-TP memory uses internal charge pump circuitry powered from VDD/VSS. Programming is initiated via I²C command and takes ~350 ms; during this time, the device locks and ignores new commands until completion. The EXT_CAP pin must be connected to a 1 µF ≥7 V capacitor to VSS to support internal charge pump operation.
Can AD5272BRMZ-50-RL7 operate with bipolar analog signals?
Yes, AD5272BRMZ-50-RL7 supports bipolar operation with ±2.5 V dual supply (VDD = +2.5 V, VSS = −2.5 V). In this configuration, terminals A and W accept signals referenced to ground with no polarity restrictions - enabling true AC-coupled or bipolar signal adjustment in instrumentation amplifiers and sensor interfaces without level-shifting circuitry.
How many unique I²C addresses can be assigned to AD5272BRMZ-50-RL7 on the same bus?
AD5272BRMZ-50-RL7 supports three unique I²C addresses via the ADDR pin: GND (0101111), VDD (0101100), or NC (0101110). These configure the two LSBs of the fixed 7-bit address (01011xx), allowing up to three AD5272BRMZ-50-RL7 devices - or mixed AD5272/AD5274 units - to share a single I²C bus without address collision.
What happens to the wiper position of AD5272BRMZ-50-RL7 at power-up?
At power-up, AD5272BRMZ-50-RL7 automatically refreshes its RDAC register from the stored 50-TP memory value, delivering the last-programmed wiper position within ~2 ms. If no 50-TP value has been written, it defaults to midscale (0x200). This behavior is hardware-enforced and requires no firmware initialization, ensuring deterministic analog state on boot.
AD5272BRMZ-50-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):
- 50k
- 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-50-RL7 FAQ
1.How can I place an order for AD5272BRMZ-50-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5272BRMZ-50-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-50-RL7 reliable?
The price and inventory of AD5272BRMZ-50-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-50-RL7 is usually 5 days.
3.What payment methods are accepted for AD5272BRMZ-50-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5272BRMZ-50-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5272BRMZ-50-RL7?
AD5272BRMZ-50-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5272BRMZ-50-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-50-RL7?
For technical support, including AD5272BRMZ-50-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5272BRMZ-50-RL7 requirements.
6.How does Aetrix verify that AD5272BRMZ-50-RL7 is sourced from the original manufacturer or authorized distributors?
All AD5272BRMZ-50-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-50-RL7 meets industry standards.
7.What is the process for return or replacement of AD5272BRMZ-50-RL7?
All AD5272BRMZ-50-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD5272BRMZ-50-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-50-RL7 part is unused and in its original packaging.
Return procedure for AD5272BRMZ-50-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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