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Analog Devices Inc. AD5144BRUZ100
- Part No.:
- AD5144BRUZ100
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD5144BRUZ100.pdf
- Description:
- IC DGT POT 100KOHM 256TP 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:156
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Product details
Overview
AD5144BRUZ100 from Analog Devices is a quad-channel, 256-position, nonvolatile digital potentiometer with I²C/SPI interface, 100 kΩ end-to-end resistance, ±8% resistor tolerance, and operation from −40°C to +125°C. It serves as a precision programmable resistor array in analog signal conditioning paths for gain/offset trimming, filter tuning, and power supply feedback control.
For engineers reviewing the AD5144BRUZ100 datasheet, AD5144BRUZ100 pinout, AD5144BRUZ100 application, or AD5144BRUZ100 equivalent, key selection criteria include guaranteed 256-step resolution, EEPROM-retained wiper settings, dual-supply capability (±2.25 V to ±2.75 V), low 35 ppm/°C temperature coefficient, and compatibility with 1.8 V logic supplies.
Technical Context
The AD5144BRUZ100 implements four independent RDAC channels, each configurable as either a rheostat (two-terminal) or potentiometer (three-terminal) with linear gain setting mode enabling precise resistor matching between RAW and RWB strings. Its architecture supports both SPI (CPOL=0/1, CPHA=0/1) and I²C (standard/fast mode) interfaces, with dedicated SYNC, SCLK/SDI/SDO or SCL/SDA/ADDR pins depending on configuration.
Nonvolatile storage uses on-chip EEPROM with 100 kcycles endurance and 50-year data retention at 125°C junction temperature. Wiper current is limited to ±1.5 mA for 100 kΩ RAB, and terminal voltage range spans VSS to VDD with no polarity constraints-enabling ground-referenced bipolar signal adjustment in dual-supply mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit (256 positions), enabling fine-grained analog control with ±0.5 LSB DNL in potentiometer mode. |
| RAB Nominal Resistance | 100 kΩ ±8%, providing predictable scaling in voltage divider or current-limiting configurations. |
| Temperature Coefficient | 35 ppm/°C (max), ensuring stable resistance over −40°C to +125°C industrial temperature range. |
| Interface Support | I²C (100/400 kHz) and SPI (up to 20 MHz), allowing flexible integration into microcontroller-based systems. |
| Wiper Current Rating | ±1.5 mA continuous (100 kΩ), defining maximum safe current through A–W or B–W terminals. |
| Bandwidth | 0.43 MHz (−3 dB, 100 kΩ), supporting audio-frequency and DC-coupled analog signal adjustment. |
| Power Supply Range | Single: 2.3 V to 5.5 V (VDD/GND); Dual: ±2.25 V to ±2.75 V (VDD/VSS), enabling rail-to-rail analog operation. |
| Logic Supply Range | 1.8 V to 5.5 V (VLOGIC), decoupled from analog rails for mixed-signal system compatibility. |
Pinout & Package
AD5144BRUZ100 is housed in a 20-lead TSSOP package (4.4 mm × 6.5 mm, 0.65 mm pitch) with exposed pad for thermal enhancement. Pin functions are defined for SPI interface per datasheet Figure 9 and Table 10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (Pin 1) | Digital control input | Active-low load strobe: rising edge transfers shift register contents to RDAC registers. |
| GND (Pin 2) | Reference node | Logic ground reference for digital circuitry and internal level-shifting. |
| A1–A4 (Pins 3,6,10,13) | Analog terminal A | High-side resistor endpoint for each of four RDAC channels; voltage range = VSS to VDD. |
| W1–W4 (Pins 4,7,11,14) | Wiper output | Programmable tap point; supports ±1.5 mA current in 100 kΩ configuration. |
| B1–B4 (Pins 5,8,12,15) | Analog terminal B | Low-side resistor endpoint; polarity unrestricted relative to A/W terminals. |
| VSS (Pin 9) | Negative supply | Required for dual-supply operation; must be decoupled with 0.1 µF + 10 µF capacitors. |
| VDD (Pin 16) | Positive supply | Analog power rail; supports single- or dual-supply biasing with same decoupling. |
| VLOGIC (Pin 17) | Digital supply | Independent 1.8 V–5.5 V logic rail; isolates digital noise from analog sections. |
| SCLK (Pin 18) | SPI clock | Edge-triggered serial clock; timing compliant with t1–t3 min/max values in Table 4. |
| SDI (Pin 19) | SPI data in | Master-to-slave command/data input; accepts 16-bit SPI frames per Figure 6. |
| SDO (Pin 20) | SPI data out | Open-drain output requiring external pull-up; used for readback of RDAC/EEPROM registers. |
Key Features
| Feature | Design Value |
|---|---|
| Nonvolatile EEPROM storage | Retains wiper settings across power cycles with 100 kcycle endurance and 50-year data retention at 125°C. |
| Independent logic supply (VLOGIC) | Enables interoperability with 1.8 V, 2.5 V, 3.3 V, or 5 V microcontrollers without level-shifting. |
| Linear gain setting mode | Allows independent programming of RAW and RWB resistances for accurate resistor matching in ratiometric circuits. |
| Dual-supply analog operation | Supports ±2.25 V to ±2.75 V rails, enabling true bipolar signal adjustment with ground-referenced inputs. |
| Low THD (−90 dB @ 1 kHz) | Minimizes harmonic distortion in AC-coupled applications such as programmable filters and audio gain stages. |
| Fast start-up time (< 75 µs) | Ensures rapid initialization after power-on or reset, critical for systems requiring deterministic boot behavior. |
Applications
| Programmable Power Supply Feedback | LCD Panel Contrast Control |
|---|---|
Use Scenario: Adjusting output voltage of isolated DC-DC converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Four-channel AD5144BRUZ100 replaces mechanical trimmers to set precise voltage division ratios in feedback networks. Use Value: Enables remote, software-controlled calibration and dynamic output scaling without hardware modification. | Use Scenario: Real-time contrast adjustment in automotive infotainment displays under varying ambient light conditions. IC Role / Device Role / Timing Role: Configured as rheostats to control current through LCD backlight LEDs or voltage to contrast pins. Use Value: Delivers smooth, glitch-free contrast transitions with 256-step resolution and EEPROM-persistent default settings. |
| Programmable Active Filter Tuning | Portable Audio Level Adjustment |
Use Scenario: Adaptive cutoff frequency tuning in medical sensor front-end anti-aliasing filters. IC Role / Device Role / Timing Role: Acts as programmable R in Sallen-Key or multiple-feedback topologies; bandwidth maintained at 0.43 MHz. Use Value: Allows field-upgradable filter response without component replacement or PCB redesign. | Use Scenario: Volume/gain control in battery-powered Bluetooth speakers with low-voltage operation. IC Role / Device Role / Timing Role: Used in potentiometer mode with 1.8 V logic supply and single 3.3 V analog rail. Use Value: Supports ultra-low quiescent current (400 nA at 2.3 V) and wide temperature range for outdoor use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5144BCPZ100 | 24-lead LFCSP package (4 mm × 4 mm); identical electrical specs and pinout mapping per channel. | Higher thermal performance (θJA = 66.8°C/W vs. 105.9°C/W) and smaller footprint; requires different PCB layout. | Select when board space is constrained or thermal dissipation is critical; not drop-in compatible with TSSOP. |
| MCP45HV51-104E/ST | Quad 256-tap, 100 kΩ, I²C-only interface; max VDD = 18 V; no SPI support; 14-lead TSSOP. | Higher voltage rating enables use in industrial 12 V/24 V systems; lacks dual-supply capability and independent VLOGIC. | Choose for high-voltage analog adjustment where I²C suffices and 18 V operation is required. |
Compared with AD5144BCPZ100, AD5144BRUZ100 offers easier hand-soldering and legacy board compatibility via TSSOP; versus MCP45HV51-104E/ST, it provides SPI flexibility, bipolar operation, and lower THD for precision AC signal paths.
Availability
AD5144BRUZ100 is available at Aetrix Electronics and suitable for programmable power supplies, LCD panel controls, active filter tuning, and portable audio systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AD5144BRUZ100 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.
The AD51xx family delivers nonvolatile, multi-channel digital potentiometers engineered for precision analog trimming, calibration, and programmable gain/offset control in harsh environments.
FAQ
What is the maximum wiper current rating for AD5144BRUZ100 at 100 kΩ?
The AD5144BRUZ100 supports ±1.5 mA continuous wiper current when configured with 100 kΩ end-to-end resistance, as specified in Table 3 under "Maximum Continuous Current." This limit ensures safe operation without exceeding switch current density or thermal derating thresholds. Exceeding this value may degrade long-term reliability or cause temporary wiper offset drift. The AD5144BRUZ100 datasheet defines this rating under both single- and dual-supply conditions.
Does AD5144BRUZ100 support dual-supply operation, and what are the valid voltage ranges?
Yes, AD5144BRUZ100 supports dual-supply operation with VDD/VSS ranging from ±2.25 V to ±2.75 V, enabling ground-referenced bipolar signal adjustment. Terminal voltages (VA, VW, VB) may swing freely between VSS and VDD without polarity restrictions. This mode is explicitly validated in Tables 2 and 3, and the General Description confirms dual-supply capability for analog signal conditioning. The AD5144BRUZ100 maintains full 256-step resolution and EEPROM functionality under dual-rail bias.
How does the linear gain setting mode function in AD5144BRUZ100?
The linear gain setting mode in AD5144BRUZ100 allows independent programming of the resistance between terminals A–W (RAW) and W–B (RWB), enabling precise resistor matching for ratiometric applications like instrumentation amplifiers or programmable gain stages. This mode is implemented via separate RDAC registers per channel and is distinct from standard potentiometer or rheostat modes. The AD5144BRUZ100 datasheet details this feature in the "Linear Gain Setting Mode" section and Figure 1 functional block diagram.
What is the EEPROM endurance and data retention specification for AD5144BRUZ100?
AD5144BRUZ100 EEPROM is rated for 100,000 write cycles and guarantees 50 years of data retention at 125°C junction temperature, per JEDEC Standard 22, Method A117. Retention scales inversely with temperature: 5 years at 100,000 cycles, 50 years at 1,000 cycles. These values are confirmed in Tables 2 and 3 footnotes 10–12. The AD5144BRUZ100 performs automatic EEPROM store on power-down or explicit command, and retains wiper position across all power states.
Can AD5144BRUZ100 operate with a 1.8 V logic supply while using a 5 V analog rail?
Yes, AD5144BRUZ100 supports independent logic and analog supplies: VLOGIC may be as low as 1.8 V while VDD operates up to 5.5 V, as specified in the "Logic Supply Range" parameter (Table 2). This decoupling eliminates level-shifter requirements in mixed-voltage systems. Input logic thresholds scale with VLOGIC (e.g., VINH = 0.7 × VLOGIC), and digital outputs remain compatible with 1.8 V controllers. The AD5144BRUZ100 maintains full SPI/I²C functionality and register access under this configuration.
AD5144BRUZ100 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 4
- Number of Taps:
- 256
- Resistance (Ohms):
- 100k
- Interface:
- SPI
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 2.3V ~ 5.5V, ±2.25V ~ 2.75V
- Features:
- Cascade Pin
- Tolerance:
- ±8%
- Temperature Coefficient (Typ):
- 35ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-TSSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 130
AD5144BRUZ100 FAQ
1.How can I place an order for AD5144BRUZ100 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5144BRUZ100 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 AD5144BRUZ100 reliable?
The price and inventory of AD5144BRUZ100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5144BRUZ100 is usually 5 days.
3.What payment methods are accepted for AD5144BRUZ100?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5144BRUZ100 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5144BRUZ100?
AD5144BRUZ100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5144BRUZ100 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 AD5144BRUZ100?
For technical support, including AD5144BRUZ100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5144BRUZ100 requirements.
6.How does Aetrix verify that AD5144BRUZ100 is sourced from the original manufacturer or authorized distributors?
All AD5144BRUZ100 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 AD5144BRUZ100 meets industry standards.
7.What is the process for return or replacement of AD5144BRUZ100?
All AD5144BRUZ100 units undergo pre-shipment inspection (PSI). If there is an issue with AD5144BRUZ100, 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 AD5144BRUZ100 part is unused and in its original packaging.
Return procedure for AD5144BRUZ100:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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