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Analog Devices Inc. AD5274BRMZ-100-RL7
- Part No.:
- AD5274BRMZ-100-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD5274BRMZ-100-RL7.pdf
- Description:
- IC DGT POT 100KOHM 256TAP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,229
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Product details
Overview
AD5274BRMZ-100-RL7 from Analog Devices is a single-channel, 256-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, features 5 ppm/°C tempco in rheostat mode, and is used for precision gain/offset trimming in industrial instrumentation and sensor calibration circuits.
For engineers reviewing the AD5274BRMZ-100-RL7 datasheet, AD5274BRMZ-100-RL7 pinout, AD5274BRMZ-100-RL7 application, or AD5274BRMZ-100-RL7 equivalent, key selection considerations include its 8-bit resolution, guaranteed 1% tolerance in R-Perf mode (codes 0x14–0xFF), 60 kHz bandwidth at 100 kΩ, and LFCSP-10 (3 mm × 3 mm) package with exposed pad.
Technical Context
The AD5274BRMZ-100-RL7 implements a segmented resistor ladder architecture with digitally controlled CMOS switches, enabling precise rheostat-mode operation between terminals A and W. Its RDAC register serves as a volatile scratchpad, while the 50-TP memory uses fuse-based nonvolatile storage-requiring ~350 ms to program and restoring on power-up.
It supports standard (100 kHz) and fast (400 kHz) I²C modes with 7-bit addressing (ADDR pin sets LSBs), acknowledges commands via SDA pull-down, and includes hardware RESET (active-low) to reload 50-TP contents into the RDAC register. Dual-supply operation (±2.5 V) enables bipolar signal adjustment with no polarity restrictions between VA and VW.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - Enables 256 discrete resistance steps across full scale (0x00 to 0xFF). |
| Nominal Resistance | 100 kΩ - Defines end-to-end resistance between A and B terminals; determines current handling (±2 mA max continuous) and THD performance (−85 dB at 1 kHz). |
| Resistor Tolerance Error | ±1% - Guaranteed over codes 0x14–0xFF in R-Perf mode; eliminates need for external calibration in open-loop gain control. |
| Temperature Coefficient | 5 ppm/°C - Measured at full-scale code; ensures stable resistance drift across −40°C to +125°C industrial range. |
| Bandwidth | 60 kHz - −3 dB point at 100 kΩ load on wiper terminal; limits usable frequency for AC signal adjustment. |
| I²C Interface | Standard/Fast mode (100/400 kHz) - Compatible with common microcontroller peripherals; supports up to three devices per bus via ADDR pin configuration. |
| Supply Range | 2.7 V to 5.5 V (single) or ±2.5 V (bipolar) - Enables use in low-voltage embedded systems and ground-referenced AC signal paths. |
| Wiper Memory | 50-TP nonvolatile - Stores one wiper position permanently; survives >100k power cycles and retains setting without backup power. |
Pinout & Package
AD5274BRMZ-100-RL7 is housed in a 10-lead LFCSP package (3 mm × 3 mm × 0.8 mm) with exposed pad (EPAD), optimized for thermal dissipation and space-constrained PCB layouts. Pin functions are validated per Analog Devices Rev. G datasheet Figure 5 and Table 10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Must be decoupled with 0.1 µF ceramic + 10 µF bulk capacitor; supports 2.7–5.5 V single supply or +2.5 V in dual-supply mode. |
| A | Resistor terminal A | One end of 100 kΩ resistive element; voltage range bounded by VSS ≤ VA ≤ VDD; no polarity constraint vs. W. |
| W | Wiper output terminal | Variable tap point; connects to op-amp feedback path or sensor bridge; capacitance = 40 pF (f = 1 MHz). |
| VSS | Negative supply input | Ground (0 V) for single supply; −2.5 V for dual supply; must be decoupled identically to VDD. |
| EXT_CAP | External capacitor connection | Requires 1 µF ≥7 V capacitor to VSS; stabilizes internal reference during 50-TP programming events. |
| GND | Logic ground reference | Separate from power ground in mixed-signal designs; ties digital logic and I²C interface to system ground. |
| 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 to VDD; supports readback of RDAC register and 50-TP contents. |
| SCL | I²C clock input | Controls timing of all serial transfers; compatible with standard/fast mode clocks up to 400 kHz. |
| ADDR | I²C address LSB input | Configures two LSBs of 7-bit address (01011xx); GND = 0x5F, VDD = 0x5C, NC = 0x5E. |
Key Features
| Feature | Design Value |
|---|---|
| 1% resistor tolerance in R-Perf mode | Validated over 0x14–0xFF codes at 100 kΩ; enables direct replacement of mechanical trimmers without post-assembly calibration. |
| 50-TP nonvolatile memory | One-time permanent storage of wiper position; eliminates battery-backed RAM or EEPROM external to IC. |
| Bipolar signal support | ±2.5 V dual supply allows ground-referenced AC signals on A/W terminals without level-shifting circuitry. |
| Low tempco rheostat operation | 5 ppm/°C drift ensures <±0.6% resistance change over −40°C to +125°C, critical for temperature-stable filters and references. |
| Wiper setting readback | Full 8-bit RDAC register value readable via I²C; enables closed-loop verification and fault logging in safety-critical systems. |
| Compact LFCSP-10 package | 3 mm × 3 mm footprint with EPAD improves thermal resistance (θJA = 58.4°C/W) versus MSOP alternative. |
Applications
| Industrial Sensor Calibration | Programmable Op-Amp Gain Control |
|---|---|
|
Use Scenario: Calibrating offset and span of pressure or temperature transducers in factory test fixtures and field-deployed modules. IC Role / Device Role / Timing Role: Rheostat connected between op-amp input and reference voltage to adjust zero-point and full-scale output voltage. Use Value: ±1% tolerance eliminates manual potentiometer tweaking; 50-TP memory preserves calibrated values across power cycles and firmware updates. |
Use Scenario: Setting variable closed-loop gain in programmable gain instrumentation amplifiers for multi-range data acquisition systems. IC Role / Device Role / Timing Role: Configurable feedback resistor in non-inverting amplifier topology, adjusted dynamically via I²C during range switching. Use Value: 60 kHz bandwidth supports DC–10 kHz signal chains; 8-bit resolution provides 0.4% gain step granularity at 100 kΩ. |
| Programmable Power Supply Feedback | Programmable Filter Time Constants |
|
Use Scenario: Adjusting output voltage setpoint in isolated DC-DC converters or lab-grade bench supplies using digital control. IC Role / Device Role / Timing Role: Rheostat in voltage divider network feeding error amplifier reference input; replaces fixed resistor + trimmer combo. Use Value: 100 kΩ value matches typical feedback divider impedance; ±1% tolerance ensures <±0.5% output voltage error before trimming. |
Use Scenario: Tuning cutoff frequency of active low-pass or band-pass filters in medical signal conditioning and audio processing. IC Role / Device Role / Timing Role: Variable resistance in RC time constant network with fixed capacitor; defines filter pole location. Use Value: 5 ppm/°C tempco minimizes center-frequency drift; I²C reconfiguration enables adaptive filtering without hardware changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital rheostat applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5272BRMZ-100-RL7 | 1024-position (10-bit) resolution; identical 100 kΩ, ±1% R-Perf tolerance, same LFCSP-10 package and pinout. | Higher resolution enables finer gain/offset control (0.1% steps vs. 0.4%); suitable where sub-1% adjustment granularity is required. | Select AD5272BRMZ-100-RL7 when 10-bit resolution is needed; AD5274BRMZ-100-RL7 is preferred for cost-sensitive 8-bit applications with identical accuracy. |
| MCP41HV51-104E/SN | 100 kΩ, 256-position, SPI interface; ±20% initial tolerance (no R-Perf mode); 6 V max supply; SOIC-8 package. | Lacks guaranteed 1% tolerance and 50-TP memory; requires external EEPROM for persistent settings; lower integration density. | Choose MCP41HV51-104E/SN only if SPI is mandated and ±20% tolerance is acceptable; AD5274BRMZ-100-RL7 delivers superior accuracy and nonvolatility in same resolution class. |
Compared with AD5272BRMZ-100-RL7, the AD5274BRMZ-100-RL7 trades resolution for lower cost and smaller command overhead, while outperforming MCP41HV51-104E/SN in guaranteed tolerance, memory persistence, and thermal stability-making it optimal for precision industrial calibration and gain-setting where 8-bit granularity suffices.
Availability
AD5274BRMZ-100-RL7 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and instrumentation gain control requiring stable component supply, long-term traceability, and extended temperature operation (−40°C to +125°C).
Supply support for AD5274BRMZ-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, 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 AD5272/AD5274 product line was designed specifically for precision analog trimming applications requiring guaranteed resistor tolerance, nonvolatile memory, and robust I²C control-targeting instrumentation, sensor interfaces, and programmable power systems.
FAQ
What is the guaranteed resistor tolerance for AD5274BRMZ-100-RL7?
The AD5274BRMZ-100-RL7 guarantees ±1% end-to-end resistor tolerance in Resistor Performance (R-Perf) mode for wiper codes 0x14 through 0xFF at 100 kΩ. This specification is validated across −40°C to +125°C and eliminates post-manufacturing calibration in open-loop applications. Outside R-Perf mode, tolerance degrades to ±15% in normal operation.
Does AD5274BRMZ-100-RL7 support dual-supply operation?
Yes, AD5274BRMZ-100-RL7 supports ±2.5 V dual-supply operation, enabling true bipolar signal adjustment on terminals A and W with no polarity constraints between them. This allows ground-referenced AC signal paths in instrumentation and sensor interfaces without external level-shifting circuitry.
How does the 50-TP memory work in AD5274BRMZ-100-RL7?
The 50-TP (50-times programmable) memory in AD5274BRMZ-100-RL7 uses fuse-based nonvolatile storage to permanently retain a single wiper position. Programming takes ~350 ms and consumes ~4 mA peak current; once stored, the value automatically reloads into the RDAC register at each power-up, ensuring consistent startup behavior without external memory.
What package type is used for AD5274BRMZ-100-RL7?
AD5274BRMZ-100-RL7 uses a 10-lead LFCSP package (3 mm × 3 mm × 0.8 mm) with exposed pad (EPAD). This thermally enhanced package achieves θJA = 58.4°C/W in JEDEC natural convection, outperforming the MSOP variant, and is RoHS-compliant with lead-free solder compatibility up to 260°C peak reflow.
Can AD5274BRMZ-100-RL7 be used in I²C multi-drop configurations?
Yes, AD5274BRMZ-100-RL7 supports multi-drop I²C buses via the ADDR pin, which configures the two LSBs of its 7-bit address (01011xx). With ADDR tied to GND, VDD, or left unconnected, up to three AD5274BRMZ-100-RL7 devices can share one bus without address conflict, simplifying system-level digital potentiometer deployment.
AD5274BRMZ-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:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Rheostat
- Number of Circuits:
- 1
- Number of Taps:
- 256
- 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
AD5274BRMZ-100-RL7 FAQ
1.How can I place an order for AD5274BRMZ-100-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5274BRMZ-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 AD5274BRMZ-100-RL7 reliable?
The price and inventory of AD5274BRMZ-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 AD5274BRMZ-100-RL7 is usually 5 days.
3.What payment methods are accepted for AD5274BRMZ-100-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5274BRMZ-100-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5274BRMZ-100-RL7?
AD5274BRMZ-100-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5274BRMZ-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 AD5274BRMZ-100-RL7?
For technical support, including AD5274BRMZ-100-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5274BRMZ-100-RL7 requirements.
6.How does Aetrix verify that AD5274BRMZ-100-RL7 is sourced from the original manufacturer or authorized distributors?
All AD5274BRMZ-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 AD5274BRMZ-100-RL7 meets industry standards.
7.What is the process for return or replacement of AD5274BRMZ-100-RL7?
All AD5274BRMZ-100-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD5274BRMZ-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 AD5274BRMZ-100-RL7 part is unused and in its original packaging.
Return procedure for AD5274BRMZ-100-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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