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Analog Devices Inc. AD5112BCPZ80-500R7
- Part No.:
- AD5112BCPZ80-500R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 8-UFDFN Exposed Pad, CSP
- Datasheet:
-
AD5112BCPZ80-500R7.pdf
- Description:
- IC DGTL POT 80KOHM 64TAP 8LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,385
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Product details
Overview
AD5112BCPZ80-500R7 from Analog Devices is a single-channel, 64-position, nonvolatile digital potentiometer with I²C interface, 80 kΩ end-to-end resistance, ±8% nominal resistor tolerance, and 35 ppm/°C rheostat temperature coefficient. It operates from 2.3 V to 5.5 V analog supply and −40°C to +125°C, supporting precision calibration in space-constrained industrial sensor front-ends.
For engineers reviewing the AD5112BCPZ80-500R7 datasheet, AD5112BCPZ80-500R7 pinout, AD5112BCPZ80-500R7 application, or AD5112BCPZ80-500R7 equivalent, this page delivers verified electrical specs, validated I²C timing, confirmed 8-lead LFCSP package mapping, and two field-tested alternative parts for resistor-programmable power supplies and analog signal conditioning circuits.
Technical Context
The AD5112BCPZ80-500R7 implements a segmented resistor ladder architecture with EEPROM-backed wiper position storage, enabling automatic restoration of last-set resistance at power-up. Its RDAC register supports unlimited real-time updates via standard-mode (100 kHz) or fast-mode (400 kHz) I²C, with <50 μs EEPROM refresh on power-on.
It supports both rheostat (A–W or B–W) and potentiometer divider (A–W–B) configurations. Wiper current rating is ±1.5 mA continuous for 80 kΩ configuration, and terminal voltage range is GND to VDD - no polarity restrictions between A, B, and W terminals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resistance value | 80 kΩ end-to-end; enables precise gain/offset tuning in high-impedance feedback paths without loading source. |
| Resolution | 6-bit (64 positions); provides 1.56% step resolution for coarse-to-fine analog adjustment. |
| Resistor tolerance | ±8% max; guaranteed over full temperature range, simplifying open-loop calibration without trimming. |
| Tempco (rheostat) | 35 ppm/°C; ensures stable resistance drift across −40°C to +125°C for automotive and industrial environments. |
| Bandwidth | 200 kHz @ 80 kΩ; supports audio-frequency and low-speed control loop applications with minimal phase lag. |
| Wiper resistance | 45 Ω typical at bottom scale; minimizes insertion loss and distortion in signal path when wiper nears terminal B. |
| EEPROM endurance | 100,000 write cycles; sufficient for factory calibration and infrequent field updates over product lifetime. |
| Supply range | 2.3 V to 5.5 V analog, 1.8 V to 5.5 V logic; interoperable with mixed-voltage microcontrollers and battery-powered systems. |
Pinout & Package
AD5112BCPZ80-500R7 uses an 8-lead, 2 mm × 2 mm × 0.55 mm LFCSP package with exposed pad (internally floating). Pin 1 is VDD; pins 2–4 are resistor terminals A/W/B; pin 5 is GND; pins 6–7 are I²C SCL/SDA; pin 8 is VLOGIC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Analog supply input | Must be decoupled with 0.1 µF ceramic + 10 µF bulk capacitor; powers internal RDAC and EEPROM. |
| A (Pin 2) | Resistor terminal A | High-side connection point; voltage range GND ≤ VA ≤ VDD; no polarity constraint vs. B or W. |
| W (Pin 3) | Wiper output | Variable tap point; supports ±1.5 mA continuous current at 80 kΩ; low 45 Ω RBS minimizes error near B. |
| B (Pin 4) | Resistor terminal B | Low-side connection; same voltage and current limits as A; enables bidirectional rheostat use. |
| GND (Pin 5) | Logic ground reference | Common return for digital interface and analog substrate; must tie to system ground plane. |
| SCL (Pin 6) | I²C clock input | Accepts 100 kHz / 400 kHz clocks; internal filtering suppresses <50 ns noise spikes. |
| SDA (Pin 7) | I²C bidirectional data | Open-drain; requires external pull-up to VLOGIC; supports readback of RDAC register and EEPROM content. |
| VLOGIC (Pin 8) | Digital supply input | Independent 1.8 V–5.5 V rail; decoupling required; sets logic threshold for SCL/SDA inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Nonvolatile wiper setting | EEPROM stores last position; restores automatically at power-up with <50 μs latency - eliminates boot-time reinitialization. |
| Low wiper resistance | 45 Ω typical at bottom scale (RBS); reduces signal attenuation and THD in audio and sensor signal chains. |
| Wide temperature operation | −40°C to +125°C rated; qualified per extended industrial spec; supports under-hood and factory-floor deployment. |
| Low power consumption | 2.5 µA max IDD @ 2.7 V / 125°C; enables always-on calibration in energy-sensitive IoT nodes. |
| High reliability memory | 50-year data retention at 125°C junction temp; meets JEDEC A117 for long-life embedded systems. |
| I²C-compatible interface | Supports standard/fast modes; includes ACK polling during EEPROM writes to prevent bus lockup. |
Applications
| Audio Volume Control | Sensor Calibration |
|---|---|
|
Use Scenario: Adjusting gain in headphone amplifier feedback loop with microcontroller-based UI. IC Role / Device Role / Timing Role: Acts as programmable feedback resistor in op-amp circuit; updated via I²C on user command. Use Value: Eliminates mechanical pot wear and board space; ±8% tolerance ensures consistent channel matching across production units. |
Use Scenario: Compensating offset/gain drift in RTD or thermocouple signal conditioning front-end. IC Role / Device Role / Timing Role: Configured as rheostat in bridge balance or amplifier gain-setting network; calibrated once at factory and retained in EEPROM. Use Value: Enables one-time trim without laser or manual adjustment; 35 ppm/°C tempco maintains accuracy over full operating range. |
| Programmable Power Supply | LCD Contrast Control |
|
Use Scenario: Setting output voltage of adjustable DC-DC converter via feedback divider ratio. IC Role / Device Role / Timing Role: Replaces fixed resistors in FB divider; wiper position determines VOUT = VREF × (1 + RAB_W/RAB_B). Use Value: Allows dynamic output reconfiguration in test equipment; 80 kΩ value minimizes current draw from feedback node. |
Use Scenario: Fine-tuning contrast voltage (VCOM) in monochrome LCD modules driven by low-power MCU. IC Role / Device Role / Timing Role: Functions as voltage divider between VDD and GND; wiper feeds LCD bias rail. Use Value: Supports software-controlled display optimization; 2.3 V min supply enables direct use from 3.3 V or 2.5 V rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5112BCPZ10-500R7 | 10 kΩ end-to-end resistance; same 64-position, I²C, EEPROM, LFCSP package. | Better suited for higher-current rheostat use (±6 mA), lower bandwidth (2 MHz), and lower impedance feedback networks. | Select when driving heavier loads or requiring faster settling (<3 µs) and tighter INL (±0.15 LSB). |
| MCP45HV51-103E/MS | 10 kΩ, 256-step, SPI interface, 5.5 V max supply, ±20% tolerance, no EEPROM auto-restore. | Requires MCU firmware to reload wiper on power-up; higher resolution but looser tolerance and no nonvolatility guarantee. | Choose for SPI-based systems needing finer granularity, accepting manual initialization and reduced accuracy stability. |
Compared with AD5112BCPZ80-500R7, the AD5112BCPZ10-500R7 offers higher current drive and speed at lower resistance, while the MCP45HV51-103E/MS trades nonvolatility and tolerance for SPI compatibility and resolution - making each suitable for distinct trade-off priorities in programmable analog design.
Availability
AD5112BCPZ80-500R7 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supplies, and portable audio level adjustment requiring stable component supply and long-term lifecycle support.
Supply support for AD5112BCPZ80-500R7 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 AD5112 is part of Analog Devices' precision digital potentiometer family designed for replacing mechanical pots in harsh-environment, calibration-critical applications where nonvolatility, temperature stability, and small footprint are essential.
FAQ
What is the maximum continuous current rating for AD5112BCPZ80-500R7 in rheostat mode?
The AD5112BCPZ80-500R7 supports ±1.5 mA continuous current through terminals A, B, or W when configured with 80 kΩ resistance. This limit is derived from thermal and switch reliability constraints - exceeding it risks long-term degradation. For higher current needs, consider the 10 kΩ variant (AD5112BCPZ10-500R7), rated at ±6 mA.
Does AD5112BCPZ80-500R7 retain its wiper setting after power cycle?
Yes, AD5112BCPZ80-500R7 retains its last programmed wiper position in on-chip EEPROM. Upon power-up, the device automatically restores that value to the RDAC register in <50 μs. No external controller action is needed - this nonvolatile behavior is guaranteed across −40°C to +125°C and for 50 years at 125°C junction temperature.
Can AD5112BCPZ80-500R7 operate with separate analog and digital supply voltages?
Yes, AD5112BCPZ80-500R7 supports independent supplies: VDD (2.3 V–5.5 V) for analog circuitry and VLOGIC (1.8 V–VDD) for I²C interface logic. This allows interfacing with 1.8 V or 3.3 V MCUs while powering the RDAC from a 5 V rail - critical for mixed-voltage system designs without level shifters.
What is the bandwidth limitation of AD5112BCPZ80-500R7 and how does it vary with code position?
AD5112BCPZ80-500R7 has a −3 dB bandwidth of 200 kHz at 80 kΩ, measured at half-scale code. Bandwidth decreases slightly at extreme codes due to parasitic capacitance effects, but remains within ±10% across all 64 positions. For higher bandwidth, the 5 kΩ variant (AD5112BCPZ5-500R7) achieves 4 MHz.
Is the exposed pad (EPAD) on AD5112BCPZ80-500R7 electrically connected internally?
No, the exposed pad on AD5112BCPZ80-500R7 is internally floating per the datasheet. It may be soldered to PCB ground for thermal relief but must not be connected to any active net. Doing so introduces no electrical benefit and risks unintended coupling - Analog Devices specifies it as "internally floating" in Table 8 of the Rev. D datasheet.
AD5112BCPZ80-500R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 64
- Resistance (Ohms):
- 80k
- Interface:
- I2C
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 1.8V ~ 5.5V, 2.3V ~ 5.5V
- Features:
- -
- Tolerance:
- ±8%
- Temperature Coefficient (Typ):
- 35ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-LFCSP-UD (2x2)
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
AD5112BCPZ80-500R7 FAQ
1.How can I place an order for AD5112BCPZ80-500R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5112BCPZ80-500R7 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 AD5112BCPZ80-500R7 reliable?
The price and inventory of AD5112BCPZ80-500R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5112BCPZ80-500R7 is usually 5 days.
3.What payment methods are accepted for AD5112BCPZ80-500R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5112BCPZ80-500R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5112BCPZ80-500R7?
AD5112BCPZ80-500R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5112BCPZ80-500R7 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 AD5112BCPZ80-500R7?
For technical support, including AD5112BCPZ80-500R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5112BCPZ80-500R7 requirements.
6.How does Aetrix verify that AD5112BCPZ80-500R7 is sourced from the original manufacturer or authorized distributors?
All AD5112BCPZ80-500R7 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 AD5112BCPZ80-500R7 meets industry standards.
7.What is the process for return or replacement of AD5112BCPZ80-500R7?
All AD5112BCPZ80-500R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD5112BCPZ80-500R7, 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 AD5112BCPZ80-500R7 part is unused and in its original packaging.
Return procedure for AD5112BCPZ80-500R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD5112BCPZ80-500R7 Tags
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