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Analog Devices Inc. AD5274BCPZ-100-RL7
- Part No.:
- AD5274BCPZ-100-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 10-VFDFN Exposed Pad, CSP
- Datasheet:
-
AD5274BCPZ-100-RL7.pdf
- Description:
- IC DGTL POT 100KOHM 10LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:460
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Product details
Overview
AD5274BCPZ-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-compatible 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 sensor calibration and programmable gain control circuits.
For engineers reviewing the AD5274BCPZ-100-RL7 datasheet, AD5274BCPZ-100-RL7 pinout, AD5274BCPZ-100-RL7 application, or AD5274BCPZ-100-RL7 equivalent, key selection considerations include guaranteed 1% resistor tolerance in R-Perf mode, 5 ppm/°C rheostat temperature coefficient, 8-bit resolution, 3 mm × 3 mm LFCSP-10 package, and compatibility with standard/fast-mode I²C (up to 400 kHz).
Technical Context
The AD5274BCPZ-100-RL7 implements a segmented resistor ladder architecture with digitally controlled wiper switching, enabling precise analog resistance adjustment. Its RDAC register serves as a volatile scratchpad for unlimited real-time updates before permanent storage into 50-TP memory.
It supports both rheostat and potentiometer configurations, features hardware RESET and tristate ADDR pin for I²C address selection (0x5C/0x5E/0x5F), and includes EXT_CAP terminal for internal charge pump stabilization during fuse programming - critical for reliable 50-TP write operations requiring ~350 ms duration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - enables 256 discrete resistance steps across full 100 kΩ range |
| Nominal Resistance | 100 kΩ - defines end-to-end resistance value at full-scale code (0xFF) |
| Resistor Tolerance Error | ±1% - guaranteed over temperature (−40°C to +125°C) in R-Perf mode, simplifying open-loop calibration |
| Temperature Coefficient | 5 ppm/°C - ensures stable resistance vs. ambient drift in precision instrumentation |
| Supply Range | 2.7 V to 5.5 V single supply or ±2.5 V dual supply - supports both unipolar and bipolar signal conditioning |
| I²C Interface Speed | Up to 400 kHz fast mode - enables rapid wiper updates in closed-loop systems |
| Wiper Memory | 50-TP nonvolatile - retains last programmed setting across power cycles without external EEPROM |
Pinout & Package
AD5274BCPZ-100-RL7 is housed in a 3 mm × 3 mm × 0.8 mm thin LFCSP-10 package with exposed pad (EPAD), rated for −40°C to +125°C operation. Thermal resistance θJA = 58.4°C/W enables high-density PCB layouts with minimal derating.
| 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 charge pump |
| A | RDAC terminal A | High-side resistor terminal; voltage range: VSS ≤ VA ≤ VDD; handles up to ±2 mA continuous current |
| W | Wiper terminal | Adjustable tap point; low 35–70 Ω wiper resistance minimizes insertion loss in signal paths |
| VSS | Negative supply / ground reference | Connect to 0 V for single-supply use; required for dual-supply operation (±2.5 V) |
| EXT_CAP | External capacitor connection | Requires 1 µF ≥7 V capacitor to VSS for stable 50-TP programming; absence prevents fuse write |
| GND | Logic ground reference | Separate from power ground in mixed-signal designs to reduce 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; supports readback of RDAC register and 50-TP contents |
| SCL | I²C clock input | Drives internal timing for command execution; tHD;STA min = 0.6 µs in fast mode |
| ADDR | I²C address LSB input | Configures device address (0x5C/0x5E/0x5F); NC = 0x5E, GND = 0x5F, VDD = 0x5C |
Key Features
| Feature | Design Value |
|---|---|
| 1% resistor tolerance in R-Perf mode | Eliminates need for system-level trimming in sensor offset/gain calibration loops |
| 50-TP nonvolatile memory | Enables one-time factory programming or field recalibration without external NVM components |
| Rheostat tempco of 5 ppm/°C | Maintains <0.1% resistance drift over 100°C range - critical for metrology-grade instruments |
| I²C readback capability | Allows real-time verification of wiper position and 50-TP memory contents for functional safety checks |
| Dual-supply support (±2.5 V) | Permits true bipolar signal adjustment (e.g., AC-coupled op-amp gain control) without level-shifting |
Applications
| Instrumentation Calibration | Programmable Gain Control |
|---|---|
|
Use Scenario: Precision sensor front-end where offset and gain must be calibrated against reference standards during production test. IC Role / Device Role / Timing Role: Digital rheostat replacing mechanical trimmers in op-amp feedback networks to set gain and zero-point. Use Value: ±1% tolerance and 5 ppm/°C tempco ensure calibration remains valid across industrial temperature range without re-trim. |
Use Scenario: Programmable gain amplifier in automated test equipment adjusting signal amplitude across multiple measurement ranges. IC Role / Device Role / Timing Role: Rheostat configured in series with op-amp feedback path to digitally select gain factor (e.g., 1×, 10×, 100×). Use Value: 8-bit resolution provides fine-grained gain steps; I²C interface allows microcontroller-driven dynamic range switching. |
| Programmable Power Supply | Filter Time Constant Adjustment |
|
Use Scenario: Adjustable DC output voltage in lab-grade bench power supplies using DAC-controlled feedback divider. IC Role / Device Role / Timing Role: Rheostat acting as programmable upper resistor in resistive divider network feeding voltage feedback pin of regulator IC. Use Value: 50-TP memory retains user-selected output voltage after power cycle; dual-supply operation supports negative rail variants. |
Use Scenario: Tunable active filter in medical signal conditioning where cutoff frequency must adapt to different physiological bands. IC Role / Device Role / Timing Role: Rheostat replacing fixed resistor in RC time constant network (e.g., Sallen-Key topology) to adjust pole location. Use Value: Low 40 pF wiper capacitance preserves high-frequency response; 300 kHz bandwidth at 20 kΩ ensures minimal phase distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital rheostat applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5272BCPZ-100-RL7 | 1024-position (10-bit) resolution vs. 256-position (8-bit); identical 100 kΩ, ±1% tolerance, LFCSP-10 package | Better suited for applications requiring finer resistance granularity (e.g., high-resolution sensor linearization) | Select AD5272BCPZ-100-RL7 when >256 steps are needed; same footprint and software interface simplify upgrade |
| MCP45HV51-103E/MS | 100 kΩ, 256-tap, but only ±20% initial tolerance; no 50-TP memory; uses SPI interface instead of I²C | Lacks guaranteed 1% tolerance and nonvolatile storage - requires external MCU-based calibration persistence | Choose MCP45HV51-103E/MS only for cost-sensitive, non-critical biasing where absolute accuracy is secondary |
Compared with AD5274BCPZ-100-RL7, AD5272BCPZ-100-RL7 offers higher resolution without sacrificing accuracy or memory, while MCP45HV51-103E/MS trades precision and ease of use for lower unit cost and higher voltage rating (up to 36 V).
Availability
AD5274BCPZ-100-RL7 is available at Aetrix Electronics and suitable for precision instrumentation, programmable power supplies, and sensor calibration systems requiring stable component supply with guaranteed long-term availability.
Supply support for AD5274BCPZ-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 product line delivers precision digital rheostats with integrated nonvolatile memory and industry-leading resistor tolerance, designed specifically for calibration-critical analog signal chains in harsh environments.
FAQ
What is the guaranteed resistor tolerance of AD5274BCPZ-100-RL7 over temperature?
The AD5274BCPZ-100-RL7 guarantees ±1% end-to-end resistor tolerance error in Resistor Performance (R-Perf) mode across the full operating temperature range of −40°C to +125°C. This specification is validated per Table 6 of the Rev. G datasheet for the 100 kΩ variant and applies only when operating within the defined R-Perf code range (0x14 to 0xFF). Outside this range, tolerance degrades to ±15% in normal mode.
Does AD5274BCPZ-100-RL7 support dual-supply operation?
Yes, AD5274BCPZ-100-RL7 supports dual-supply operation at ±2.5 V to ±2.75 V, enabling true bipolar signal adjustment without level-shifting circuitry. In this configuration, VDD = +2.5 V and VSS = −2.5 V, allowing resistor terminals A and W to swing symmetrically around ground - essential for AC-coupled op-amp gain control and instrumentation amplifier offset trimming.
How many times can the 50-TP memory of AD5274BCPZ-100-RL7 be programmed?
The 50-TP memory of AD5274BCPZ-100-RL7 can be programmed exactly 50 times - each program operation permanently stores the current RDAC wiper position by blowing internal fuses. After the 50th program, further attempts return a NACK on the I²C bus. The part retains the last successfully programmed value across all power cycles, and power-on automatically refreshes the RDAC register from 50-TP memory.
What package type is used for AD5274BCPZ-100-RL7?
AD5274BCPZ-100-RL7 uses a 10-lead LFCSP (Lead Frame Chip Scale Package) measuring 3 mm × 3 mm × 0.8 mm with an exposed pad (EPAD). This thermally enhanced package achieves θJA = 58.4°C/W in JEDEC natural convection conditions and is RoHS-compliant. The "BCPZ" suffix in the part number explicitly denotes the LFCSP-10 variant.
Can AD5274BCPZ-100-RL7 operate with standard-mode I²C (100 kHz)?
Yes, AD5274BCPZ-100-RL7 fully supports standard-mode I²C at 100 kHz as well as fast-mode at 400 kHz. Its interface complies with I²C timing specifications in Table 7 of the datasheet, including tHIGH ≥ 4 µs (standard) or ≥ 0.6 µs (fast), tLOW ≥ 4.7 µs or ≥ 1.3 µs, and tSU;DAT ≥ 250 ns or ≥ 100 ns. No external level shifters or protocol translators are required for compatibility with legacy microcontrollers.
AD5274BCPZ-100-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-LFCSP-WD (3x3)
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 35
AD5274BCPZ-100-RL7 FAQ
1.How can I place an order for AD5274BCPZ-100-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5274BCPZ-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 AD5274BCPZ-100-RL7 reliable?
The price and inventory of AD5274BCPZ-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 AD5274BCPZ-100-RL7 is usually 5 days.
3.What payment methods are accepted for AD5274BCPZ-100-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5274BCPZ-100-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5274BCPZ-100-RL7?
AD5274BCPZ-100-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5274BCPZ-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 AD5274BCPZ-100-RL7?
For technical support, including AD5274BCPZ-100-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5274BCPZ-100-RL7 requirements.
6.How does Aetrix verify that AD5274BCPZ-100-RL7 is sourced from the original manufacturer or authorized distributors?
All AD5274BCPZ-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 AD5274BCPZ-100-RL7 meets industry standards.
7.What is the process for return or replacement of AD5274BCPZ-100-RL7?
All AD5274BCPZ-100-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD5274BCPZ-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 AD5274BCPZ-100-RL7 part is unused and in its original packaging.
Return procedure for AD5274BCPZ-100-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD5274BCPZ-100-RL7 Tags
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