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Analog Devices Inc. AD5252BRUZ1-RL7
- Part No.:
- AD5252BRUZ1-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD5252BRUZ1-RL7.pdf
- Description:
- IC DGTL POT 1KOHM 256TAP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,026
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Product details
Overview
AD5252BRUZ1-RL7 from Analog Devices is a dual-channel, I²C-compatible, nonvolatile digital potentiometer with 256-position resolution per channel and a nominal end-to-end resistance of 1 kΩ. It operates from single supplies (2.7 V to 5.5 V) or dual supplies (±2.25 V to ±2.75 V), features 4 MHz bandwidth in the 1 kΩ version, and restores wiper settings from EEPROM within 300 µs at power-on. It is used for precision LCD VCOM adjustment and white LED brightness control.
For engineers reviewing the AD5252BRUZ1-RL7 datasheet, AD5252BRUZ1-RL7 pinout, AD5252BRUZ1-RL7 application, or AD5252BRUZ1-RL7 equivalent, key selection criteria include guaranteed 256-step resolution, 1 kΩ RAB tolerance stored in EEMEM, ±6 dB step commands for logarithmic scaling, synchronous/asynchronous dual-channel update, and TSSOP-14 package compatibility with industrial temperature range (–40°C to +105°C).
Technical Context
The AD5252BRUZ1-RL7 integrates two independent 8-bit RDAC channels with dedicated A/B/W terminals per channel and shared I²C interface (SDA/SCL), address pins (AD0/AD1), and write-protect (WP). Its architecture supports direct register access to both RDAC and 12-byte user EEMEM space, enabling storage of calibration data or system identifiers alongside wiper settings.
It implements patented resistance-tolerance storage in EEMEM, allowing absolute RAB values to be retrieved for high-accuracy applications. The device supports linear increment/decrement, ±6 dB (doubling/halving) step changes, and wiper readback - all configurable via I²C commands with 400 kHz maximum clock frequency and acknowledge polling for EEMEM writes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits per channel (256 positions); enables fine-grained analog tuning with ±0.25 LSB typical DNL in potentiometer mode. |
| End-to-End Resistance | 1 kΩ (factory-trimmed); supports high-bandwidth operation up to 4 MHz and low-noise performance (3 nV/√Hz thermal noise). |
| Supply Range | Single: 2.7 V to 5.5 V; dual: ±2.25 V to ±2.75 V; allows integration into mixed-signal systems with rail-to-rail terminal voltage operation (VSS to VDD). |
| EEMEM Retention | 100-year data retention at 55°C junction temperature; ensures long-term calibration stability without external memory. |
| Power-On Restore Time | 300 µs typical; guarantees deterministic startup behavior with midscale preset before EEMEM reload, critical for fail-safe biasing. |
| I²C Interface | Standard-mode (400 kHz max); supports up to four devices on one bus via AD0/AD1 addressing; open-drain SDA requires external pull-up. |
| Operating Temperature | –40°C to +105°C; qualified for extended industrial environments including automotive infotainment and industrial HMI panels. |
Pinout & Package
AD5252BRUZ1-RL7 is housed in a 14-lead TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch) with exposed pad for thermal enhancement. Pin 1 is VDD; pins 4/5/6 and 12/13/14 serve as W1/B1/A1 and A3/B3/W3 respectively; SDA (pin 7), SCL (pin 9), AD0 (pin 2), AD1 (pin 11), WP (pin 3), DGND (pin 10), and VSS (pin 8) complete the interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | Must source 35 mA for 26 ms during EEMEM store; decoupling required near pin for stable I²C and analog operation. |
| AD0 / AD1 (Pins 2, 11) | I²C device address inputs | Set 2-bit hardware address (00–11); enable up to four AD5252BRUZ1-RL7 devices on same I²C bus without software arbitration. |
| WP (Pin 3) | Write-protect enable (active low) | Prevents accidental EEMEM writes; tied high by default unless external logic asserts low during programming sequences. |
| W1, B1, A1 (Pins 4–6) | RDAC1 wiper and resistor terminals | Support rheostat (W–B) or potentiometer (A–W–B) configurations; no polarity restriction between terminals. |
| SDA / SCL (Pins 7, 9) | I²C bidirectional data/clock | Open-drain SDA requires external pull-up; SCL pull-up recommended; timing compliant with 400 kHz standard-mode I²C. |
| VSS (Pin 8) | Negative supply or ground | Sinks 35 mA during EEMEM store in dual-supply mode; must connect to system ground or negative rail with low-impedance path. |
| DGND (Pin 10) | Digital ground reference | Connect to system analog ground at single point to minimize digital switching noise coupling into RDAC analog paths. |
| A3, B3, W3 (Pins 12–14) | RDAC3 wiper and resistor terminals | Independent second channel; identical electrical specs to RDAC1; supports synchronous/asynchronous update with RDAC1. |
Key Features
| Feature | Design Value |
|---|---|
| Nonvolatile wiper storage with write protection | EEMEM retains settings across power cycles; WP pin disables writes to prevent corruption during firmware updates or brownout conditions. |
| ±6 dB step adjustment command | Doubles or halves wiper position in one I²C transaction - ideal for audio volume or LED brightness where logarithmic response is required. |
| Resistance tolerance stored in EEMEM | Factory-measured absolute RAB value saved in nonvolatile memory; eliminates need for external calibration in precision sensor or DAC-replacement applications. |
| 12-byte user EEMEM space | Available for storing lookup tables, board IDs, or factory calibration coefficients - accessible via same I²C interface as RDAC registers. |
| Synchronous or asynchronous dual-channel update | RDAC1 and RDAC3 can be updated simultaneously (sync) or independently (async), enabling coordinated gain/offset control or isolated channel tuning. |
Applications
| LCD Panel VCOM Adjustment | White LED Brightness Control |
|---|---|
|
Use Scenario: Fine-tuning common voltage on active-matrix LCD panels to minimize image flicker and gamma shift across temperature. IC Role / Device Role / Timing Role: Dual-channel programmable resistor sets DC bias voltage at VCOM amplifier output; RDAC1 adjusts baseline, RDAC3 compensates for temperature drift. Use Value: Eliminates manual trimmer replacement; achieves <±10 mV VCOM stability over –40°C to +105°C using stored RAB tolerance and ±6 dB steps for rapid factory calibration. |
Use Scenario: Dynamic brightness control of white LED backlights in medical displays and industrial HMIs requiring smooth dimming without PWM artifacts. IC Role / Device Role / Timing Role: Configured as rheostat between LED cathode and current-sense amplifier feedback node; wiper position sets LED current magnitude. Use Value: 256-step resolution and ±6 dB commands enable perceptually linear dimming; 4 MHz bandwidth prevents signal distortion at high-frequency PWM dimming carriers. |
| RF Power Amplifier Bias Control | Sensor Calibration Offset/Gain Trim |
|
Use Scenario: Setting quiescent current (IQ) in GaAs or LDMOS RF power amplifiers for base station transceivers operating across wide temperature ranges. IC Role / Device Role / Timing Role: Acts as programmable load resistor in bias network; RDAC1 controls gate voltage, RDAC3 adjusts source degeneration for linearity optimization. Use Value: 100-year EEMEM retention ensures factory-set bias remains valid over equipment lifetime; resistance tempco of 650 ppm/°C is compensated via stored RAB values. |
Use Scenario: Trimming offset and gain errors in precision instrumentation amplifiers used with RTD, thermocouple, or strain gauge sensors. IC Role / Device Role / Timing Role: Replaces mechanical trimpots in 4-wire bridge excitation and differential amplifier feedback paths; dual channels handle offset (RDAC1) and gain (RDAC3) independently. Use Value: Stored RAB tolerance enables <0.1% absolute accuracy after calibration; 8-bit resolution supports <1 µV/V gain adjustment in 24-bit DAQ systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5252BRUZ10-RL7 | Same die, 10 kΩ RAB (vs. 1 kΩ); 400 kHz bandwidth; higher wiper resistance (75–130 Ω). | Better suited for low-current, high-impedance gain-setting circuits; unsuitable for 4 MHz signal paths or high-speed LED dimming. | Select when precision gain control > bandwidth is required; verify terminal current limits (±500 µA max for 10 kΩ) match application. |
| MCP45HV51-103E/ST | Microchip 7-bit (128-step), 100 kΩ, SPI interface, ±15 V tolerant; no EEMEM tolerance storage or ±6 dB commands. | Targeted at high-voltage industrial controls; lacks dual-channel sync update and user EEMEM space. | Choose for HV biasing where SPI is preferred and nonvolatile calibration traceability is not required; expect higher INL (±1.5 LSB) vs. AD5252BRUZ1-RL7 (±0.5 LSB). |
Compared with AD5252BRUZ1-RL7, the AD5252BRUZ10-RL7 trades bandwidth for higher resistance accuracy in gain-setting roles, while the MCP45HV51-103E/ST offers voltage robustness at the cost of resolution, interface flexibility, and calibration metadata support.
Availability
AD5252BRUZ1-RL7 is available at Aetrix Electronics and suitable for LCD VCOM adjustment, white LED driver biasing, RF amplifier quiescent current setting, and sensor calibration applications requiring stable component supply across extended temperature and long product lifecycles.
Supply support for AD5252BRUZ1-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 with precision signal chain solutions.
The AD5252BRUZ1-RL7 belongs to Analog Devices' precision digital potentiometer product line, designed specifically for replacing mechanical trimmers in applications demanding nonvolatile storage, multi-channel coordination, and factory-calibrated resistance accuracy.
FAQ
What is the resistance tolerance specification for AD5252BRUZ1-RL7, and how is it stored?
The AD5252BRUZ1-RL7 has a nominal end-to-end resistance of 1 kΩ with a tolerance of ±30% at 25°C, measured and stored in its EEMEM during factory test. This absolute RAB value is retrievable via I²C read commands, enabling post-calibration compensation in precision applications without external measurement. The stored value remains valid for 100 years at 55°C junction temperature.
Does AD5252BRUZ1-RL7 support simultaneous update of both RDAC channels?
Yes, AD5252BRUZ1-RL7 supports synchronous dual-channel update: a single I²C command can write new wiper positions to both RDAC1 and RDAC3 simultaneously, ensuring correlated adjustment without timing skew. This is essential for matched gain/offset control in instrumentation or balanced bias networks where channel tracking is critical.
What is the maximum signal bandwidth supported by AD5252BRUZ1-RL7 in rheostat mode?
In the 1 kΩ configuration, AD5252BRUZ1-RL7 delivers a –3 dB bandwidth of 4 MHz, verified under VDD = 5 V conditions. This enables use in high-speed analog signal paths such as video level control or fast LED modulation, provided terminal currents remain within ±5 mA continuous limits and PCB layout minimizes parasitic capacitance at A/B/W pins.
How does the ±6 dB step command function in AD5252BRUZ1-RL7?
The ±6 dB step command in AD5252BRUZ1-RL7 performs a hardware-accelerated doubling (–6 dB) or halving (+6 dB) of the current wiper code in one I²C transaction - equivalent to shifting the 8-bit value left/right by one bit. This enables rapid logarithmic scaling for audio or lighting control without host MCU computation, reducing firmware overhead and improving real-time responsiveness.
Can AD5252BRUZ1-RL7 operate from a dual-supply configuration, and what are the limits?
Yes, AD5252BRUZ1-RL7 supports dual-supply operation with VDD ranging from +2.25 V to +2.75 V and VSS from –2.25 V to –2.75 V (|VDD – VSS| ≤ 5.5 V). Terminal voltages VA, VB, and VW may swing fully between VSS and VDD, enabling true bipolar analog signal conditioning. Negative supply must sink 35 mA during EEMEM store operations.
AD5252BRUZ1-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 2
- Number of Taps:
- 256
- Resistance (Ohms):
- 1k
- Interface:
- I2C
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V, ±2.25V ~ 2.75V
- Features:
- Selectable Address
- Tolerance:
- ±30%
- Temperature Coefficient (Typ):
- 650ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-TSSOP
- Operating Temperature:
- -40°C ~ 105°C
- Resistance - Wiper (Ohms) (Typ):
- 200
AD5252BRUZ1-RL7 FAQ
1.How can I place an order for AD5252BRUZ1-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5252BRUZ1-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 AD5252BRUZ1-RL7 reliable?
The price and inventory of AD5252BRUZ1-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5252BRUZ1-RL7 is usually 5 days.
3.What payment methods are accepted for AD5252BRUZ1-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5252BRUZ1-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5252BRUZ1-RL7?
AD5252BRUZ1-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5252BRUZ1-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 AD5252BRUZ1-RL7?
For technical support, including AD5252BRUZ1-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5252BRUZ1-RL7 requirements.
6.How does Aetrix verify that AD5252BRUZ1-RL7 is sourced from the original manufacturer or authorized distributors?
All AD5252BRUZ1-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 AD5252BRUZ1-RL7 meets industry standards.
7.What is the process for return or replacement of AD5252BRUZ1-RL7?
All AD5252BRUZ1-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD5252BRUZ1-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 AD5252BRUZ1-RL7 part is unused and in its original packaging.
Return procedure for AD5252BRUZ1-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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