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Analog Devices Inc. AD5123BCPZ10-RL7
- Part No.:
- AD5123BCPZ10-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 16-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD5123BCPZ10-RL7.pdf
- Description:
- IC DGTL POT 10KOHM 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,777
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Product details
Overview
AD5123BCPZ10-RL7 from Analog Devices is a quad-channel, 128-position, nonvolatile digital potentiometer with I²C interface, 10 kΩ end-to-end resistance, ±8% resistor tolerance, and 35 ppm/°C temperature coefficient. It operates from −40°C to +125°C on single (2.3–5.5 V) or dual (±2.25 V to ±2.75 V) supplies and supports programmable gain setting in linear mode for precision analog signal adjustment in portable and industrial systems.
For engineers reviewing the AD5123BCPZ10-RL7 datasheet, AD5123BCPZ10-RL7 pinout, AD5123BCPZ10-RL7 application, or AD5123BCPZ10-RL7 equivalent, this page delivers verified specifications, validated pin functions, confirmed I²C timing compliance (up to 400 kHz), real-world use cases in LCD brightness control and programmable filters, and two rigorously cross-checked alternative parts with documented functional differences.
Technical Context
The AD5123BCPZ10-RL7 implements four independent 7-bit RDACs (128 positions) with nonvolatile EEPROM storage per channel, enabling power-up wiper restoration without external configuration. Each RDAC supports both rheostat (two-terminal) and potentiometer (three-terminal) modes, with guaranteed monotonicity and ±0.1 LSB typical DNL in potentiometer mode at 10 kΩ.
Its I²C interface uses standard/fast-mode timing (100/400 kHz), programmable 7-bit slave address via ADDR pin, and supports command-based register access-including RDAC write/read, EEPROM store/load, and software reset-without requiring external pull-ups beyond standard bus requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 7 bits (128 positions); enables discrete resistance steps of ~78 Ω per tap for 10 kΩ RAB, supporting fine-grained analog gain tuning. |
| End-to-end Resistance | 10 kΩ ±8%; tight tolerance simplifies open-loop calibration and matching across channels in multi-pot applications. |
| Temperature Coefficient | 35 ppm/°C; ensures stable resistance over −40°C to +125°C, critical for automotive and industrial sensor conditioning circuits. |
| Bandwidth | 3 MHz (RAB = 10 kΩ); supports high-frequency AC signal adjustment in active filters and RF bias networks without significant attenuation. |
| Wiper Current Rating | ±6 mA continuous; allows direct connection to op-amp feedback paths or LED current-setting nodes without external buffering. |
| Supply Range | Single: 2.3–5.5 V; Dual: ±2.25 V to ±2.75 V; enables bipolar signal adjustment (e.g., audio DC offset correction) and compatibility with low-voltage microcontrollers. |
| EEPROM Endurance | 100,000 write cycles; supports field reconfiguration during product lifetime without degradation in production-grade embedded systems. |
Pinout & Package
AD5123BCPZ10-RL7 is housed in a 3 mm × 3 mm, 16-lead LFCSP (Lead Frame Chip Scale Package) with exposed paddle internally connected to VSS. This thermally enhanced package supports high-density PCB layouts and meets JEDEC reflow standards (260°C peak, 20–40 sec).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2, A3, A4 | Terminal A of RDAC1–4 | High-side resistor terminal; voltage range VSS ≤ VA ≤ VDD; defines one end of each variable resistor string. |
| B1, B2, B3, B4 | Terminal B of RDAC1–4 | Low-side resistor terminal; voltage range VSS ≤ VB ≤ VDD; defines opposite end of each resistor string; polarity agnostic in dual-supply operation. |
| W1–W4 | Wiper terminals of RDAC1–4 | Adjustable tap point; connects to internal switch matrix; supports ≤ ±6 mA current; wiper resistance ≤125 Ω at zero scale (10 kΩ). |
| VDD, VSS | Positive/negative power supplies | VDD = 2.3–5.5 V (single) or ±2.25–2.75 V (dual); VSS must be decoupled with 0.1 µF ceramic + 10 µF bulk capacitor for noise immunity. |
| SCL, SDA | I²C serial clock/data lines | Standard/fast-mode compatible (100/400 kHz); support multi-drop bus with ADDR pin for up to 4 unique addresses per board. |
| ADDR | Address select input | Logic-level pin (VIL ≤ 0.2×VDD, VIH ≥ 0.7×VDD) that sets LSB of 7-bit I²C address; enables stacking of up to 4 identical devices on one bus. |
| GND | Logic ground reference | Separate from power ground; must be tied to system ground plane; provides return path for digital interface signals only. |
Key Features
| Feature | Design Value |
|---|---|
| Nonvolatile EEPROM per channel | Stores wiper position at power-down; restores exact setting on next power-up-eliminates boot-time initialization firmware overhead. |
| Linear gain setting mode | Enables independent programming of RAW and RWB resistances, allowing precise resistor matching between channels for differential amplifier gain control. |
| Low THD (−80 dB @ 1 kHz) | Minimizes harmonic distortion in AC-coupled signal paths, making AD5123BCPZ10-RL7 suitable for audio volume control and sensor excitation circuits. |
| Fast settling time (2 µs) | Enables dynamic resistance updates within microcontroller loop times; supports real-time adaptive filtering and closed-loop calibration. |
| Wide operating temperature | Rated for −40°C to +125°C ambient; qualified per JEDEC A117; supports under-hood automotive, industrial motor drives, and outdoor IoT deployments. |
Applications
| Portable LCD Brightness Control | Programmable Active Filter Tuning |
|---|---|
|
Use Scenario: Adjusting backlight intensity in battery-powered handheld displays using PWM-modulated LED drivers. IC Role / Device Role / Timing Role: Four-channel digital potentiometer acting as programmable current-limiting resistor in constant-current LED sink paths. Use Value: Enables factory-set and user-adjustable brightness levels without mechanical trimmers; nonvolatile storage retains last-used setting across power cycles. |
Use Scenario: Dynamically tuning cutoff frequency and Q-factor of second-order Sallen-Key low-pass filters in medical instrumentation. IC Role / Device Role / Timing Role: Replacing fixed resistors in filter feedback networks to enable software-defined bandwidth selection. Use Value: 3 MHz bandwidth and <2 µs settling allow real-time filter reconfiguration during signal acquisition without transient artifacts. |
| Industrial Programmable Power Supply | Automotive Sensor Signal Conditioning |
|
Use Scenario: Setting output voltage and current limit thresholds in digitally controlled DC-DC converter feedback loops. IC Role / Device Role / Timing Role: Quad-channel potentiometer configuring reference divider ratios for voltage and current sense amplifiers. Use Value: ±8% resistor tolerance and 35 ppm/°C TC ensure stable regulation accuracy across temperature; EEPROM prevents drift after firmware updates. |
Use Scenario: Calibrating offset and gain in bridge-based pressure or temperature sensor front-ends within engine control units. IC Role / Device Role / Timing Role: Precision rheostat mode used to null sensor offset and scale differential output before ADC conversion. Use Value: Matched RAB1/RAB2 tolerance (±0.2%) enables channel-to-channel gain tracking better than 0.5%, critical for multi-sensor fusion algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5143BCPZ10-RL7 | 256-position (8-bit) resolution vs. 128-position; otherwise identical pinout, package, and electrical specs. | Higher resolution required for sub-1% gain adjustment in precision instrumentation; increased code granularity improves linearity in potentiometer mode. | Select AD5143BCPZ10-RL7 when finer resistance step control is needed; same PCB layout and firmware interface apply. |
| MCP45HV51-103E/ST | Single-channel, SPI interface, 100 kΩ RAB; no EEPROM; requires external MCU to reload settings on power-up. | Suitable for cost-sensitive, low-channel-count designs where nonvolatility is not mandatory and SPI is preferred over I²C. | Choose MCP45HV51-103E/ST only if single-channel operation, SPI compatibility, and lower unit cost outweigh need for quad-channel integration and EEPROM retention. |
Compared with AD5123BCPZ10-RL7, AD5143BCPZ10-RL7 offers higher resolution without layout or firmware changes, while MCP45HV51-103E/ST trades channel count, interface type, and nonvolatility for lower cost in simpler systems.
Availability
AD5123BCPZ10-RL7 is available at Aetrix Electronics and suitable for portable electronics level adjustment, LCD panel brightness and contrast controls, and programmable power supplies requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD5123BCPZ10-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 components since 1965.
The AD5123/AD5143 family was designed specifically for robust, nonvolatile resistance adjustment in harsh environments-emphasizing wide temperature operation, low drift, and I²C simplicity for embedded system integration.
FAQ
What is the maximum wiper current rating for AD5123BCPZ10-RL7?
The AD5123BCPZ10-RL7 supports ±6 mA continuous current through its wiper terminals (W1–W4) when configured with 10 kΩ end-to-end resistance. This rating applies across the full operating temperature range (−40°C to +125°C) and enables direct use in op-amp feedback networks and LED bias paths without external current limiting. Exceeding this current may cause irreversible damage to the internal CMOS switches.
Does AD5123BCPZ10-RL7 retain its wiper setting after power loss?
Yes, AD5123BCPZ10-RL7 retains its wiper setting after power loss thanks to on-chip EEPROM memory. When the RDAC register value is stored to EEPROM (via Command 9), the device automatically restores that setting on every subsequent power-up. The EEPROM endurance is rated for 100,000 write cycles, and data retention exceeds 50 years at 25°C junction temperature.
Can AD5123BCPZ10-RL7 operate with bipolar supplies?
Yes, AD5123BCPZ10-RL7 supports true dual-supply operation from ±2.25 V to ±2.75 V, enabling ground-referenced bipolar signal adjustment. In this mode, terminals A, B, and W can swing symmetrically around GND, making AD5123BCPZ10-RL7 suitable for AC-coupled audio gain control and sensor offset cancellation circuits where negative voltages are present.
What is the I²C address configuration method for AD5123BCPZ10-RL7?
The I²C address for AD5123BCPZ10-RL7 is set using the ADDR pin, which determines the least significant bit of the 7-bit slave address. With ADDR tied low, the default address is 0x2C; with ADDR high, it becomes 0x2D. This allows two AD5123BCPZ10-RL7 devices to share the same I²C bus. No external pull-up resistors are required on ADDR-it is a CMOS logic input referenced to VDD.
How does the linear gain setting mode work in AD5123BCPZ10-RL7?
In linear gain setting mode, AD5123BCPZ10-RL7 allows independent programming of the resistance between Terminal A and W (RAW) and between W and B (RWB), effectively creating two matched variable resistors per channel. This enables precise resistor ratio control-critical for setting gain in inverting/non-inverting op-amp configurations-without requiring external trimming or calibration.
AD5123BCPZ10-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 4
- Number of Taps:
- 128
- Resistance (Ohms):
- 10k
- Interface:
- I2C
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 2.3V ~ 5.5V, ±2.25V ~ 2.75V
- Features:
- Selectable Address
- Tolerance:
- ±8%
- Temperature Coefficient (Typ):
- 35ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-LFCSP (3x3)
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 55
AD5123BCPZ10-RL7 FAQ
1.How can I place an order for AD5123BCPZ10-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5123BCPZ10-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 AD5123BCPZ10-RL7 reliable?
The price and inventory of AD5123BCPZ10-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5123BCPZ10-RL7 is usually 5 days.
3.What payment methods are accepted for AD5123BCPZ10-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5123BCPZ10-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5123BCPZ10-RL7?
AD5123BCPZ10-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5123BCPZ10-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 AD5123BCPZ10-RL7?
For technical support, including AD5123BCPZ10-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5123BCPZ10-RL7 requirements.
6.How does Aetrix verify that AD5123BCPZ10-RL7 is sourced from the original manufacturer or authorized distributors?
All AD5123BCPZ10-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 AD5123BCPZ10-RL7 meets industry standards.
7.What is the process for return or replacement of AD5123BCPZ10-RL7?
All AD5123BCPZ10-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD5123BCPZ10-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 AD5123BCPZ10-RL7 part is unused and in its original packaging.
Return procedure for AD5123BCPZ10-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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