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Analog Devices Inc. AD5245BRJZ10-RL7
- Part No.:
- AD5245BRJZ10-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- SOT-23-8
- Datasheet:
-
AD5245BRJZ10-RL7.pdf
- Description:
- IC DGT POT 10KOHM 256TAP SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:9,654
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Product details
Overview
AD5245BRJZ10-RL7 from Analog Devices is a 256-position I²C-compatible digital potentiometer with 10 kΩ end-to-end resistance, SOT-23-8 package, ±0.25 LSB integral nonlinearity (INL), 45 ppm/°C resistance temperature coefficient, and 2.7 V to 5.5 V single-supply operation-used for precision LCD VCOM adjustment and sensor transducer calibration.
For engineers reviewing the AD5245BRJZ10-RL7 datasheet, AD5245BRJZ10-RL7 pinout, AD5245BRJZ10-RL7 application, or AD5245BRJZ10-RL7 equivalent, key selection criteria include I²C address flexibility via AD0 pin, midscale power-on preset, shutdown mode (<1 µA), low wiper resistance (50–120 Ω), and guaranteed monotonicity in both rheostat and potentiometer modes.
Technical Context
The AD5245BRJZ10-RL7 implements a thin-film resistor ladder with CMOS switch matrix controlled by an 8-bit I²C register. Its architecture supports two operating modes: rheostat (A–W or B–W) and potentiometer divider (A–W–B), with voltage output accuracy dependent on resistor ratio rather than absolute value-enabling 15 ppm/°C tempco in divider mode.
I²C interface compliance includes standard-mode (400 kHz) timing with programmable slave address (7-bit base + AD0 bit), full read/write of wiper register, and dedicated control bits for midscale reset and shutdown-where shutdown opens Terminal A and shorts W to B without altering register contents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-end Resistance | 10 kΩ - defines maximum rheostat resistance and sets voltage division range in potentiometer mode |
| Resolution | 256 positions (8-bit) - enables 0.39% step resolution for fine analog tuning |
| INL (Rheostat Mode) | ±0.25 LSB - ensures monotonic resistance change across all taps, critical for closed-loop sensor biasing |
| Tempco (RAB) | 45 ppm/°C - guarantees stable resistance over –40°C to +125°C industrial temperature range |
| Supply Voltage | 2.7 V to 5.5 V - supports direct integration into 3.3 V and 5 V systems without level-shifting |
| Shutdown Current | 0.01–1 µA - enables ultra-low-power standby in battery-operated LCD panels and portable instrumentation |
| I²C Clock Frequency | 400 kHz - allows fast wiper updates (≤2 µs settling) synchronized with host microcontroller timing |
Pinout & Package
AD5245BRJZ10-RL7 uses a compact 8-lead SOT-23-8 package (2.9 mm × 3 mm), optimized for space-constrained PCB layouts in portable electronics and automotive displays.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| W | Wiper terminal | Output node for variable resistance (A–W or B–W) or voltage divider (A–W–B); voltage bounded by GND ≤ VW ≤ VDD |
| VDD | Positive supply | Power rail for logic and resistor ladder; must be powered before applying voltages to A/B/W terminals |
| GND | Digital ground | Reference for I²C signals and internal logic; requires low-inductance connection to minimize noise coupling |
| SCL | I²C clock input | Positive-edge-triggered serial clock; requires external pull-up resistor per I²C bus specification |
| SDA | I²C data I/O | Open-drain bidirectional data line; requires external pull-up resistor and supports read/write of wiper register |
| AD0 | Address decode bit | Configures LSB of 7-bit I²C slave address, enabling up to two AD5245BRJZ10-RL7 devices on same bus |
| B | Resistor terminal | Low-side connection in rheostat mode or ground reference in potentiometer mode; voltage bounded by GND ≤ VB ≤ VDD |
| A | Resistor terminal | High-side connection in rheostat mode or VDD reference in potentiometer mode; voltage bounded by GND ≤ VA ≤ VDD |
Key Features
| Feature | Design Value |
|---|---|
| Power-on midscale preset | Automatically initializes wiper to code 0x80 (5 kΩ at 10 kΩ RAB), eliminating startup uncertainty in fault-tolerant systems |
| Shutdown mode | Opens Terminal A and shorts W to B, reducing power to <1 µA while preserving register state for instant recovery |
| Low wiper resistance | 50–120 Ω typical - minimizes insertion loss and signal distortion in RF amplifier bias networks |
| Guaranteed monotonicity | R-DNL ≤ ±1 LSB - ensures no step reversals during wiper sweeps, essential for closed-loop gain control loops |
| Ratio-based tempco | 15 ppm/°C in potentiometer mode - achieves superior thermal stability vs. absolute-resistance rheostat mode (45 ppm/°C) |
Applications
| LCD Panel VCOM Adjustment | Sensor Transducer Calibration |
|---|---|
Use Scenario: Fine-tuning common voltage on TFT-LCD source driver ICs to eliminate screen flicker and grayscale inversion. IC Role / Device Role / Timing Role: Digitally programmable DC bias element replacing mechanical trimmer; updated via I²C during factory calibration or system boot. Use Value: Enables automated, repeatable VCOM setting with 0.39% resolution and <15 ppm/°C drift-reducing manual labor and improving display uniformity across temperature. | Use Scenario: Calibrating offset and gain of pressure, temperature, or optical sensors in automotive cabin modules. IC Role / Device Role / Timing Role: Precision rheostat in sensor bridge nulling circuit or potentiometer in analog front-end gain stage. Use Value: Provides 256-step repeatability and 45 ppm/°C stability over –40°C to +125°C, meeting AEC-Q200 requirements without external compensation. |
| RF Amplifier Biasing | Industrial Gain Control |
Use Scenario: Setting quiescent current in GaAs FET or LDMOS power amplifiers for optimal linearity and efficiency. IC Role / Device Role / Timing Role: Low-capacitance (95 pF) rheostat in drain or gate bias network; configured via I²C during power-up sequence. Use Value: Delivers <120 Ω wiper resistance and 600 kHz bandwidth at 10 kΩ-minimizing RF signal degradation while supporting remote digital tuning. | Use Scenario: Adjusting feedback resistance in op-amp-based programmable gain amplifiers for test equipment and PLC analog I/O. IC Role / Device Role / Timing Role: Digitally reconfigurable potentiometer in inverting/non-inverting amplifier topology; updated dynamically during measurement cycles. Use Value: Offers ±0.25 LSB INL and 2.7–5.5 V supply compatibility-ensuring accurate, stable gain scaling across wide industrial voltage rails and temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5487ETE+T | 256-tap, 10 kΩ, SPI interface, TDFN-8, 1 µA shutdown current | Requires SPI host instead of I²C; lacks AD0 address pin for multi-device bus | Preferred when existing design uses SPI peripherals and board layout accommodates TDFN package |
| MCP41HV51-103E/ST | 256-tap, 10 kΩ, SPI interface, SOIC-8, 5.5 V max supply, 100 ppm/°C tempco | Higher tempco and no shutdown mode; rated only to +85°C ambient | Suitable for cost-sensitive industrial controls where extended temperature range and ultra-low power are not required |
Compared with MAX5487ETE+T and MCP41HV51-103E/ST, AD5245BRJZ10-RL7 offers I²C compatibility with dual-device addressing, lower tempco (45 vs. 100 ppm/°C), and guaranteed shutdown functionality-making it optimal for space-constrained, thermally demanding, and multi-device I²C systems.
Availability
AD5245BRJZ10-RL7 is available at Aetrix Electronics and suitable for LCD panel VCOM adjustment, sensor transducer calibration, RF amplifier biasing, and industrial gain control requiring stable component supply across automotive, medical, and industrial embedded programs.
Supply support for AD5245BRJZ10-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 since 1965.
The AD5245 product line delivers precision, low-power, I²C-compatible digital potentiometers for replacing mechanical trimmers in factory-calibrated systems-designed specifically for high-reliability analog tuning in harsh environments.
FAQ
What is the power-on behavior of the AD5245BRJZ10-RL7?
The AD5245BRJZ10-RL7 automatically presets its wiper to midscale (code 0x80) at power-up, delivering 5 kΩ resistance between terminals A and W (or B and W) for a 10 kΩ device. This behavior eliminates startup uncertainty and simplifies system initialization-no external configuration is needed. The AD5245BRJZ10-RL7 maintains this default unless overwritten via I²C command, ensuring predictable analog output during boot sequences in LCD and sensor applications.
Does the AD5245BRJZ10-RL7 support multiple devices on the same I²C bus?
Yes, the AD5245BRJZ10-RL7 supports up to two devices on a shared I²C bus using the AD0 pin to configure the LSB of the 7-bit slave address. With AD0 tied to GND or VDD, the device responds to addresses 0x2C or 0x2D respectively-enabling independent control without bus contention. This feature is confirmed in the AD5245BRJZ10-RL7 datasheet Table 10 and functional block diagram, making it ideal for multi-channel calibration systems.
What is the maximum voltage allowed across terminals A, B, and W of the AD5245BRJZ10-RL7?
The AD5245BRJZ10-RL7 specifies that voltages at terminals A, B, and W must remain within the GND to VDD range, with absolute maximum ratings limiting terminal-to-GND voltage to VDD (not exceeding +7 V). Exceeding VDD risks forward-biasing internal ESD diodes, potentially powering VDD unintentionally. This constraint is explicitly defined in the Absolute Maximum Ratings table (Table 4) and Terminal Voltage Operating Range section of the AD5245BRJZ10-RL7 datasheet.
How does shutdown mode affect the wiper position and terminal connections in the AD5245BRJZ10-RL7?
In shutdown mode, the AD5245BRJZ10-RL7 opens Terminal A and shorts the wiper (W) to Terminal B, resulting in near-zero resistance between W and B in rheostat mode or 0 V output in potentiometer mode. Critically, the wiper register contents are preserved-so exiting shutdown restores the prior setting instantly. This behavior is documented in the I²C Interface section and confirmed by the functional description of the SD bit in the AD5245BRJZ10-RL7 datasheet.
Can the AD5245BRJZ10-RL7 operate from a 3.3 V supply while maintaining full specifications?
Yes, the AD5245BRJZ10-RL7 operates fully across 2.7 V to 5.5 V, including 3.3 V nominal supplies. All key specs-including ±0.25 LSB INL, 45 ppm/°C tempco, 400 kHz I²C timing, and 8 µA supply current-are guaranteed from –40°C to +125°C at 3 V ±10%. Electrical Characteristics Tables 1 and 2 explicitly list performance under 3 V conditions, confirming compatibility with modern low-voltage microcontrollers and portable systems using the AD5245BRJZ10-RL7.
AD5245BRJZ10-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 256
- Resistance (Ohms):
- 10k
- Interface:
- I2C
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- Selectable Address
- Tolerance:
- ±30%
- Temperature Coefficient (Typ):
- 45ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-8
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 50
AD5245BRJZ10-RL7 FAQ
1.How can I place an order for AD5245BRJZ10-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5245BRJZ10-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 AD5245BRJZ10-RL7 reliable?
The price and inventory of AD5245BRJZ10-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5245BRJZ10-RL7 is usually 5 days.
3.What payment methods are accepted for AD5245BRJZ10-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5245BRJZ10-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5245BRJZ10-RL7?
AD5245BRJZ10-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5245BRJZ10-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 AD5245BRJZ10-RL7?
For technical support, including AD5245BRJZ10-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5245BRJZ10-RL7 requirements.
6.How does Aetrix verify that AD5245BRJZ10-RL7 is sourced from the original manufacturer or authorized distributors?
All AD5245BRJZ10-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 AD5245BRJZ10-RL7 meets industry standards.
7.What is the process for return or replacement of AD5245BRJZ10-RL7?
All AD5245BRJZ10-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD5245BRJZ10-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 AD5245BRJZ10-RL7 part is unused and in its original packaging.
Return procedure for AD5245BRJZ10-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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