Analog Devices Inc. AD5290YRMZ50

Overview

AD5290YRMZ50 from Analog Devices is a 256-position, 50 kΩ digital potentiometer in MSOP-10 package, operating from ±15 V dual supply or +30 V single supply. It functions as a programmable resistor or voltage divider with 35 ppm/°C resistance tempco, 0.002% THD, and 4 μs wiper settling time. It serves in high-voltage DACs, programmable power supplies, and precision gain/offset adjustment circuits.

For engineers reviewing the AD5290YRMZ50 datasheet, AD5290YRMZ50 pinout, AD5290YRMZ50 application, or AD5290YRMZ50 equivalent, key selection considerations include its ±15 V analog terminal voltage range, SPI-compatible 3-wire interface, automotive-grade −40°C to +125°C operation, and guaranteed monotonicity in both rheostat and potentiometer modes.

Technical Context

The AD5290YRMZ50 implements a 3-stage segmented RDAC architecture with patented switch topology, enabling precise 8-bit (256-step) resistance control across its 50 kΩ end-to-end resistance. Its wiper resistance (50–100 Ω) remains stable across codes but varies with temperature and VDD, requiring design compensation in absolute-resistance applications.

In potentiometer divider mode, output voltage accuracy relies on resistor ratio matching rather than absolute values-yielding only 5 ppm/°C voltage divider tempco and ±0.5 LSB INL/DNL. The device uses CMOS transmission-gate switches biased from VDD, with ESD protection on all analog and digital pins per Figure 30 and 31 of the datasheet.

Key Specifications

Pinout & Package

AD5290YRMZ50 is housed in a compact MSOP-10 package (3 mm × 4.9 mm, 0.87 mm height) with exposed pad for thermal performance. Pin assignments are validated per Figure 4 and Table 6 of Rev. D datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5292YRMZ50, AD5290YRMZ50 offers identical analog performance but omits EEPROM-reducing cost and simplifying initialization. Versus MAX5487ETA+T, AD5290YRMZ50 delivers higher voltage compliance and automotive temperature rating at the expense of larger footprint and higher unit price.

Availability

AD5290YRMZ50 is available at Aetrix Electronics and suitable for programmable power supplies, high-voltage DACs, and audio volume control systems requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability.

Supply support for AD5290YRMZ50 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, headquartered in Norwood, MA.

The AD5290 belongs to Analog Devices' iCMOS™ digital potentiometer family-designed specifically for high-voltage, high-precision, automotive-qualified applications demanding robustness, low distortion, and wide temperature operation.

FAQ

What is the maximum analog voltage that can be applied to terminals A, B, and W of the AD5290YRMZ50?

The AD5290YRMZ50 supports analog terminal voltages from VSS to VDD. With ±15 V dual supply, terminals A, B, and W operate safely from −15 V to +15 V. In +30 V single-supply mode (VSS = 0 V), they accept 0 V to +30 V. Absolute maximum ratings allow −16.5 V to +35 V, but operation outside VSS–VDD violates guaranteed specs and risks ESD diode conduction.

Does the AD5290YRMZ50 retain its wiper setting after power cycling?

No, the AD5290YRMZ50 does not retain wiper position after power loss. It features a hardware midscale preset that forces the wiper to code 0x80 on power-up. For nonvolatile storage of wiper settings, consider the pin-compatible AD5292YRMZ50, which integrates EEPROM to restore the last programmed value.

Can the AD5290YRMZ50 be used in single-supply configurations?

Yes, the AD5290YRMZ50 supports single-supply operation with VSS tied to 0 V and VDD ranging from +4.5 V to +33 V. Performance specifications-including THD, linearity, and bandwidth-are guaranteed only at VDD/VSS = ±15 V or +30 V/0 V. At lower voltages like +5 V, functionality is maintained but key parameters are not characterized.

What is the purpose of the GND pin (Pin 4) versus the VSS pin (Pin 3) on the AD5290YRMZ50?

Pin 3 (VSS) is the negative analog supply rail-connected to −15 V in dual-supply mode or 0 V in single-supply mode. Pin 4 (GND) is the digital ground reference for CS, CLK, and SDI logic inputs. These pins must be connected to their respective system grounds; separating them improves noise immunity in mixed-signal layouts, though they may share a common ground plane in simpler designs.

How does the AD5290YRMZ50 achieve 5 ppm/°C voltage divider temperature coefficient when its resistance tempco is 35 ppm/°C?

The AD5290YRMZ50 achieves 5 ppm/°C voltage tempco in potentiometer divider mode because output voltage depends on resistor *ratio* (RWA/RWB), not absolute resistance. Since both segments track similarly with temperature, ratio drift is minimized. This contrasts with rheostat mode, where absolute RAB drift dominates-hence the 35 ppm/°C spec applies only to end-to-end resistance, not divider output stability.