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Analog Devices Inc. AD5272BRMZ-100-RL7
- Part No.:
- AD5272BRMZ-100-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD5272BRMZ-100-RL7.pdf
- Description:
- IC DGT POT 100KOHM 1024TP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:18,160
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Product details
Overview
AD5272BRMZ-100-RL7 from Analog Devices is a single-channel, 1024-position digital rheostat with 100 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-100-RL7 datasheet, AD5272BRMZ-100-RL7 pinout, AD5272BRMZ-100-RL7 application, or AD5272BRMZ-100-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 with high-density PCB layouts.
Technical Context
The AD5272BRMZ-100-RL7 implements a segmented resistor ladder architecture with digitally controlled CMOS switches, enabling precise wiper positioning across 1024 codes. Its R-Perf mode guarantees ±1% tolerance over 0x04B–0x3FF (75–1023) for 100 kΩ variants, validated at |VDD − VSS| ≥ 2.7 V.
It features true bipolar operation (±2.5 V), allowing ground-referenced AC signal adjustment without level-shifting. The 50-TP memory uses permanent fuse programming-each store command consumes one of 50 write cycles, with 350 ms execution time and automatic power-up restore.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10 bits - enables 1024 discrete resistance steps for fine-grained analog tuning |
| Nominal Resistance | 100 kΩ - sets full-scale rheostat range; supports low-current, high-impedance biasing |
| Resistor Tolerance Error | ±1% - eliminates need for external calibration in open-loop gain/offset applications |
| Temperature Coefficient | 5 ppm/°C - ensures stable resistance over −40°C to +125°C, critical for sensor calibration |
| Interface | I²C-compatible, up to 400 kHz - enables direct connection to microcontrollers without protocol translation |
| Memory Type | 50-TP nonvolatile - retains last wiper setting across power cycles; 50 guaranteed writes |
| Supply Range | 2.7 V to 5.5 V single or ±2.5 V dual - supports both standard logic rails and bipolar signal conditioning |
| Package | LFCSP-10 (3 mm × 3 mm × 0.8 mm) - compact footprint ideal for space-constrained industrial modules |
Pinout & Package
AD5272BRMZ-100-RL7 is housed in a thin 10-lead LFCSP (3 mm × 3 mm × 0.8 mm) with exposed pad (EPAD), rated for −40°C to +125°C operation. Decoupling requires 0.1 µF ceramic + 10 µF bulk capacitors on VDD and VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Accepts 2.7–5.5 V; must be decoupled to suppress noise coupling into RDAC ladder |
| A | Fixed terminal A of RDAC | Connects to one end of 100 kΩ resistor string; voltage range: VSS ≤ VA ≤ VDD |
| W | Wiper output terminal | Provides variable resistance between A and W; low 35–70 Ω wiper resistance minimizes insertion loss |
| VSS | Negative supply input | Ground for single supply; −2.5 V for dual supply; decoupling mandatory for PSRR performance |
| EXT_CAP | External capacitor node | 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 layouts to avoid digital noise injection |
| RESET | Hardware reset input | Active-low; forces RDAC register reload from 50-TP memory; tie to VDD if unused |
| SDA | I²C bidirectional data line | Open-drain; requires external pull-up; supports readback of RDAC register and 50-TP contents |
| SCL | I²C clock input | Drives serial interface timing; compatible with standard (100 kHz) and fast (400 kHz) modes |
| ADDR | I²C address LSB input | Configures two LSBs of 7-bit address (01011xx); GND/VDD/NC yields three unique bus addresses |
Key Features
| Feature | Design Value |
|---|---|
| 1% resistor tolerance in R-Perf mode | Guaranteed over 75–1023 codes for 100 kΩ variant-enables calibration-free system-level accuracy |
| 50-TP nonvolatile memory | 50 independent fuse-programmable wiper settings; no external EEPROM or battery required |
| I²C readback capability | Allows real-time verification of RDAC register value-critical for fault-tolerant and safety-critical designs |
| Bipolar signal support | ±2.5 V dual-supply operation enables ground-referenced AC gain control without DC blocking caps |
| Low tempco (5 ppm/°C) | Minimizes drift-induced errors in precision instrumentation over full industrial temperature range |
| Compact LFCSP-10 package | 3 mm × 3 mm footprint with thermal pad-supports high-density layout while maintaining θJA = 58.4°C/W |
Applications
| Op-Amp Gain Control | Sensor Calibration |
|---|---|
|
Use Scenario: Programmable gain stage in a precision analog front-end for industrial pressure sensors. IC Role / Device Role / Timing Role: Rheostat connected between op-amp output and inverting input to set closed-loop gain dynamically. Use Value: 100 kΩ range and ±1% tolerance allow gain accuracy within 0.5% over temperature without trimming resistors. |
Use Scenario: Offset and span adjustment in a 4–20 mA transmitter for RTD-based temperature measurement. IC Role / Device Role / Timing Role: Two AD5272BRMZ-100-RL7 units configure bias and scaling networks in analog signal path. Use Value: 50-TP memory preserves calibrated values across power cycles; 5 ppm/°C tempco prevents recalibration drift. |
| Programmable Power Supply | Instrumentation Offset Adjustment |
|
Use Scenario: Digital control of output voltage in a lab-grade bench power supply with remote sensing. IC Role / Device Role / Timing Role: Rheostat in feedback divider of adjustable linear regulator IC to set output voltage. Use Value: I²C interface allows MCU-based voltage programming; 10-bit resolution enables 10 mV steps at 10 V output. |
Use Scenario: Fine-tuning of zero-point offset in a medical ECG amplifier before ADC digitization. IC Role / Device Role / Timing Role: Connected as variable resistor in op-amp summing junction to inject calibrated offset current. Use Value: Guaranteed 1% tolerance eliminates post-manufacture manual trim; R-Perf mode ensures repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital rheostat applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5272BRMZ-20-RL7 | 20 kΩ nominal resistance; same 10-bit resolution, ±1% tolerance, and LFCSP-10 package | Better suited for higher-current rheostat paths (up to ±3 mA vs. ±2 mA for 100 kΩ) | Select when lower resistance and higher current drive are required; not drop-in due to different RAW value |
| AD5274BRMZ-100-RL7 | 8-bit resolution (256 positions); identical 100 kΩ, ±1% tolerance, and I²C interface | Lower code granularity reduces tuning precision but simplifies firmware handling | Choose for cost-sensitive or less demanding applications where 256-step resolution suffices |
Compared with AD5272BRMZ-100-RL7, the AD5272BRMZ-20-RL7 offers higher current capability but reduced voltage range per step, while the AD5274BRMZ-100-RL7 trades resolution for simpler control and lower cost-neither is pin-compatible, requiring layout revision.
Availability
AD5272BRMZ-100-RL7 is available at Aetrix Electronics and suitable for industrial instrumentation, sensor signal conditioning, and programmable power supplies requiring stable component supply, long-term calibration retention, and extended temperature operation.
Supply support for AD5272BRMZ-100-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 precision analog tuning applications requiring guaranteed resistor tolerance, nonvolatile memory, and robust I²C control-targeting replacement of mechanical potentiometers in harsh environments.
FAQ
What is the guaranteed resistor tolerance for AD5272BRMZ-100-RL7 in precision applications?
The AD5272BRMZ-100-RL7 guarantees ±1% end-to-end resistor tolerance in R-Perf mode for codes 0x04B to 0x3FF (75–1023) when |VDD − VSS| ≥ 2.7 V. This specification is production-tested and enables calibration-free operation in open-loop gain and offset circuits-unlike standard digital potentiometers that specify only typical or maximum drift.
How does the 50-TP memory in AD5272BRMZ-100-RL7 function during power-up?
On power-up, the AD5272BRMZ-100-RL7 automatically refreshes its RDAC register from the last stored value in 50-TP memory, completing within 2 ms. This behavior ensures deterministic startup without host MCU intervention. Each 50-TP store command permanently programs one of 50 fuse locations, consuming a finite write cycle-no external backup power or EEPROM is needed.
Can AD5272BRMZ-100-RL7 operate with bipolar signals, and what are the supply requirements?
Yes, AD5272BRMZ-100-RL7 supports true bipolar operation with ±2.5 V dual supplies (VDD = +2.5 V, VSS = −2.5 V), enabling ground-referenced AC signal adjustment. Terminal A and W tolerate any polarity relative to each other within VSS ≤ VTERM ≤ VDD. This eliminates level-shifting circuitry in audio and sensor front-ends where signals swing above and below ground.
What is the role of the EXT_CAP pin on AD5272BRMZ-100-RL7, and what capacitor is required?
The EXT_CAP pin on AD5272BRMZ-100-RL7 connects to an external 1 µF capacitor (≥7 V rating) tied to VSS. This capacitor stabilizes the internal charge pump used during 50-TP memory programming. Without it, fuse programming fails or becomes unreliable. The capacitor must be placed close to the pin with low-inductance routing to ensure clean voltage ramp during the 350 ms store operation.
How does the I²C interface of AD5272BRMZ-100-RL7 support multiple devices on the same bus?
The AD5272BRMZ-100-RL7 uses a 7-bit I²C address where the five MSBs are fixed (01011) and the two LSBs are set by the ADDR pin (GND = 11, VDD = 00, NC = 10). This allows up to three AD5272BRMZ-100-RL7 units-or mixed AD5272/AD5274 variants-to share one I²C bus without address conflict, supporting scalable multi-channel calibration systems.
AD5272BRMZ-100-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):
- 100k
- 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-100-RL7 FAQ
1.How can I place an order for AD5272BRMZ-100-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5272BRMZ-100-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-100-RL7 reliable?
The price and inventory of AD5272BRMZ-100-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-100-RL7 is usually 5 days.
3.What payment methods are accepted for AD5272BRMZ-100-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5272BRMZ-100-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5272BRMZ-100-RL7?
AD5272BRMZ-100-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5272BRMZ-100-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-100-RL7?
For technical support, including AD5272BRMZ-100-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5272BRMZ-100-RL7 requirements.
6.How does Aetrix verify that AD5272BRMZ-100-RL7 is sourced from the original manufacturer or authorized distributors?
All AD5272BRMZ-100-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-100-RL7 meets industry standards.
7.What is the process for return or replacement of AD5272BRMZ-100-RL7?
All AD5272BRMZ-100-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD5272BRMZ-100-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-100-RL7 part is unused and in its original packaging.
Return procedure for AD5272BRMZ-100-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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