Analog Devices Inc. AD5214TDB

Overview

AD5214TDB from Analog Devices is a quad-channel, 64-position digital potentiometer with I²C-compatible interface, 10 kΩ nominal resistance, ±20% end-to-end tolerance, and 2.7 V to 5.5 V supply range. It serves as a programmable resistor in precision gain/offset adjustment circuits for sensor signal conditioning and industrial DAC calibration.

For engineers reviewing the AD5214TDB datasheet, AD5214TDB pinout, AD5214TDB application, or AD5214TDB equivalent, key selection criteria include channel count, wiper resistance (70 Ω max), temperature coefficient (35 ppm/°C), I²C address configuration (A0/A1 pins), and guaranteed monotonicity over full scale.

Technical Context

The AD5214TDB integrates four independent digital potentiometers on a single die, each with 6-bit resolution (64 taps) and nonvolatile wiper position storage via EEPROM. Its I²C interface supports standard-mode (100 kHz) and fast-mode (400 kHz) operation with slave address selectable via A0 and A1 pins.

Each channel features a three-terminal rheostat or potentiometer configuration, with terminal resistance matching within ±5% across channels and guaranteed 100,000 write-cycle endurance for EEPROM registers. The device operates over –40°C to +85°C and includes power-on reset to mid-scale (32).

Key Specifications

Pinout & Package

AD5214TDB is housed in a 20-lead TSSOP package (4.4 mm × 6.5 mm, 0.65 mm pitch) with exposed thermal pad for improved power dissipation in continuous adjustment applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital potentiometer applications.

Compared with AD5214TDB, AD5204BRUZ10 trades EEPROM persistence for lower unit cost and SPI flexibility, while MCP42050-I/SL offers higher resistance range but sacrifices wiper performance and hardware write protection - making AD5214TDB optimal for field-calibratable, temperature-critical industrial systems.

Availability

AD5214TDB is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded DAC trimming, and multi-channel audio level control requiring stable component supply and long-term parameter retention.

Supply support for AD5214TDB 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies.

The AD5210/AD5214 series targets precision programmable resistance applications in industrial automation, test equipment, and sensor signal chains where nonvolatility, channel independence, and I²C simplicity are essential.

FAQ

What is the maximum clock frequency supported by the I²C interface of AD5214TDB?

The AD5214TDB supports I²C fast-mode operation up to 400 kHz. This allows rapid wiper position updates during system initialization or dynamic calibration routines. The device complies with standard I²C timing specifications and requires appropriate pull-up resistors on SCL and SDA lines. AD5214TDB maintains reliable communication across its full operating temperature range (–40°C to +85°C) at this speed.

Does AD5214TDB retain its wiper position after power cycling?

Yes, AD5214TDB stores the last wiper position in on-chip EEPROM, ensuring nonvolatile retention across power cycles. This feature eliminates the need for host MCU reinitialization and supports autonomous recalibration in remote or inaccessible installations. AD5214TDB guarantees 100,000 write cycles and data retention for 100 years at +25°C, with verified operation down to –40°C.

Can all four channels of AD5214TDB be updated simultaneously via I²C?

No, AD5214TDB does not support broadcast or simultaneous multi-channel update. Each channel's wiper position must be written individually using its dedicated command byte and data byte sequence. However, sequential updates can be executed rapidly (<1 ms per channel at 400 kHz I²C), enabling near-concurrent adjustment in time-sensitive applications. AD5214TDB's architecture ensures channel isolation during these operations.

What is the wiper resistance specification for AD5214TDB at 5 V supply?

At VDD = 5 V, the AD5214TDB specifies a maximum wiper resistance of 70 Ω. This low value minimizes insertion error in precision feedback networks and ensures predictable gain behavior in op-amp configurations. The wiper resistance remains stable across the full 0–63 tap range and varies less than ±10% over the industrial temperature range (–40°C to +85°C). AD5214TDB's design maintains this spec under all valid operating conditions.

How is the I²C slave address configured on AD5214TDB?

The AD5214TDB uses two hardware pins - A0 and A1 - to configure its 3-bit I²C slave address. These pins set bits A1–A0 of the 7-bit address, resulting in four possible addresses: 0x2C, 0x2D, 0x2E, or 0x2F. The third bit (A2) is hardwired to '0'. This allows up to four AD5214TDB devices to share the same I²C bus without address conflict. AD5214TDB ignores the R/W bit during address recognition.