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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Digital Potentiometers

Analog Devices Inc. AD5293BRUZ-50-RL7

Name: AD5293BRUZ-50-RL7
Brand: Analog Devices Inc.
SKU: AD5293BRUZ-50-RL7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD5293BRUZ-50-RL7

Manufacturer:: Analog Devices Inc.

Category:: Digital Potentiometers

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: AD5293BRUZ-50-RL7.pdf

Description:: IC DGT POT 50KOHM 1024TP 14TSSOP

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Product details

Overview

AD5293BRUZ-50-RL7 from Analog Devices is a single-channel, 1024-position digital potentiometer with 50 kΩ nominal resistance, ±1% resistor tolerance in R-perf mode, and SPI-compatible serial interface. It operates from ±9 V to ±16.5 V dual supply or 9 V to 33 V single supply, and delivers 5 ppm/°C voltage divider temperature coefficient for precision gain/offset adjustment in instrumentation systems.

For engineers reviewing the AD5293BRUZ-50-RL7 datasheet, AD5293BRUZ-50-RL7 pinout, AD5293BRUZ-50-RL7 application, or AD5293BRUZ-50-RL7 equivalent, this device supports high-voltage rheostat and potentiometer divider configurations, wiper setting readback, and resistor performance mode calibration-critical for sensor calibration, programmable power supplies, and precision analog signal conditioning.

Technical Context

The AD5293BRUZ-50-RL7 implements a digitally controlled, nonvolatile RDAC architecture with 10-bit resolution and two operating modes: normal (±20% RAB tolerance) and resistor performance mode (±1% RAB tolerance). Its internal shift register accepts 16-bit SPI commands (CPOL = 0, CPHA = 1), enabling write, read, and reset operations with RDY pin synchronization.

It features three-terminal resistive elements (A, W, B) supporting both rheostat (A–W or W–B) and potentiometer divider (A–W–B) topologies. Terminal voltage range spans VSS to VDD, allowing bipolar signal adjustment in dual-supply configurations, while EXT_CAP pin requires a 1 µF ≥7 V capacitor for internal reference stabilization.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	10-bit (1024 positions): enables fine-grained analog tuning with 0.1% step resolution across full scale.
Nominal Resistance	50 kΩ: defines end-to-end resistance for impedance matching and gain-setting accuracy in amplifier feedback networks.
Resistor Tolerance	±1% in R-perf mode: eliminates external trimming in open-loop calibration applications like sensor offset compensation.
Tempco (Voltage Divider)	5 ppm/°C: ensures stable division ratio over −40°C to +105°C, critical for temperature-invariant reference scaling.
Supply Range	±9 V to ±16.5 V dual or 9 V to 33 V single: supports direct integration into industrial power rails without level-shifting circuitry.
Interface	SPI (CPOL = 0, CPHA = 1) up to 50 MHz: enables fast, deterministic wiper updates synchronized via SYNC and RDY signals.
Wiper Resistance	60–100 Ω: minimizes insertion error in low-impedance rheostat paths and preserves linearity in current-sense applications.

Pinout & Package

AD5293BRUZ-50-RL7 is housed in a 14-lead TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch), rated for −40°C to +105°C operation and RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1 (RESET)	Asynchronous hardware reset	Drives RDAC register to midscale (0x200) on rising edge; tie to VLOGIC if unused to prevent spurious resets.
2 (VSS)	Negative supply rail	Supports dual-supply operation down to −16.5 V; must be decoupled with 0.1 µF + 10 µF capacitors.
3 (A)	RDAC terminal A	High-side resistor endpoint; voltage range VSS ≤ VA ≤ VDD enables bipolar signal routing in AC-coupled designs.
4 (W)	Wiper terminal	Programmable tap point; supports ≤±2 mA continuous current; low 60–100 Ω resistance preserves signal integrity.
5 (B)	RDAC terminal B	Low-side resistor endpoint; polarity agnostic vs. A/W, enabling flexible rheostat or divider orientation.
6 (VDD)	Positive supply rail	Accepts up to +33 V; decoupling required to suppress switching noise coupling into analog terminals.
7 (EXT_CAP)	Reference capacitor connection	Requires 1 µF ≥7 V ceramic capacitor to stabilize internal bandgap reference and reduce code-dependent tempco drift.
8 (VLOGIC)	Digital supply (2.7–5.5 V)	Independent of analog supplies; powers SPI interface and logic; decoupling prevents digital noise injection into RDAC core.
9 (GND)	Logic ground reference	Must be connected to system ground plane; separate from analog ground unless star-point topology is used.
10 (DIN)	SPI data input	16-bit shift register input clocked on SCLK falling edge; accepts command/data for write/read/reset operations.
11 (SCLK)	SPI clock input	Up to 50 MHz rate; timing-critical for setup/hold compliance per Table 5; drives internal state machine transitions.
12 (SYNC)	Frame synchronization	Falling edge enables shift register; rising edge after 16th clock commits data to RDAC register or triggers readback.
13 (SDO)	SPI data output	Open-drain; requires external pull-up; outputs readback data or daisy-chains multiple AD5293 devices.
14 (RDY)	Operation completion flag	Active-high open-drain signal pulses high when RDAC register update or read completes (t12 ≤ 410 ns in normal mode).

Key Features

Feature	Design Value
Calibrated ±1% RAB tolerance (R-perf mode)	Enables direct replacement of mechanical pots in open-loop calibration without factory trimming or software compensation.
5 ppm/°C voltage divider tempco	Maintains <0.05% gain drift over full industrial temperature range, eliminating recalibration in precision sensor front-ends.
Wiper setting readback via SDO	Confirms actual register value post-write, essential for fault-tolerant systems requiring closed-loop verification.
±16.5 V dual-supply capability	Interfaces directly with op-amps and ADCs operating on split rails, avoiding external level translators in analog signal chains.
Rheostat mode tempco: 35 ppm/°C	Provides predictable resistance drift in current-source or LED bias applications where absolute RAB stability matters more than ratio.

Applications

Instrumentation Gain Adjustment	Programmable Power Supply
Use Scenario: Precision op-amp gain setting in automated test equipment where calibration drift must remain below 0.1% over temperature. IC Role / Device Role / Timing Role: Two-terminal rheostat (A–W) in noninverting amplifier feedback path, configured in R-perf mode for ±1% absolute resistance accuracy. Use Value: Eliminates manual potentiometer adjustment and annual recalibration; achieves 0.05% gain stability from −40°C to +105°C using 5 ppm/°C divider tempco.	Use Scenario: Digitally adjustable output voltage in industrial DC power supplies requiring remote setpoint control and EEPROM-less persistence. IC Role / Device Role / Timing Role: Three-terminal potentiometer divider (A–W–B) scaling reference voltage into error amplifier input; updated via SPI during runtime. Use Value: Enables 1024-step output resolution (e.g., 0–30 V in 29.3 mV steps); ±1% RAB tolerance ensures initial setpoint accuracy without per-unit trimming.
Sensor Calibration	Programmable Filter Tuning
Use Scenario: Offset and span calibration of bridge-based pressure sensors in harsh-environment transmitters. IC Role / Device Role / Timing Role: Rheostat (W–B) in Wheatstone bridge leg; R-perf mode guarantees matched resistance tolerance across production units. Use Value: Reduces calibration time by >70% versus manual trimmers; ±1% RAB tolerance allows binning-free assembly and field recalibration via firmware.	Use Scenario: Real-time cutoff frequency adjustment in anti-aliasing filters for multi-channel data acquisition systems. IC Role / Device Role / Timing Role: Potentiometer divider (A–W–B) setting RC time constant in active filter feedback network; updated synchronously across channels. Use Value: Supports dynamic bandwidth reconfiguration (e.g., 1 kHz → 10 kHz) with <1 µs settling; 5 ppm/°C tempco prevents thermal detuning during extended operation.

Instrumentation Gain Adjustment

Programmable Power Supply

Use Scenario: Precision op-amp gain setting in automated test equipment where calibration drift must remain below 0.1% over temperature.

IC Role / Device Role / Timing Role: Two-terminal rheostat (A–W) in noninverting amplifier feedback path, configured in R-perf mode for ±1% absolute resistance accuracy.

Use Value: Eliminates manual potentiometer adjustment and annual recalibration; achieves 0.05% gain stability from −40°C to +105°C using 5 ppm/°C divider tempco.

Use Scenario: Digitally adjustable output voltage in industrial DC power supplies requiring remote setpoint control and EEPROM-less persistence.

IC Role / Device Role / Timing Role: Three-terminal potentiometer divider (A–W–B) scaling reference voltage into error amplifier input; updated via SPI during runtime.

Use Value: Enables 1024-step output resolution (e.g., 0–30 V in 29.3 mV steps); ±1% RAB tolerance ensures initial setpoint accuracy without per-unit trimming.

Sensor Calibration

Programmable Filter Tuning

Use Scenario: Offset and span calibration of bridge-based pressure sensors in harsh-environment transmitters.

IC Role / Device Role / Timing Role: Rheostat (W–B) in Wheatstone bridge leg; R-perf mode guarantees matched resistance tolerance across production units.

Use Value: Reduces calibration time by >70% versus manual trimmers; ±1% RAB tolerance allows binning-free assembly and field recalibration via firmware.

Use Scenario: Real-time cutoff frequency adjustment in anti-aliasing filters for multi-channel data acquisition systems.

IC Role / Device Role / Timing Role: Potentiometer divider (A–W–B) setting RC time constant in active filter feedback network; updated synchronously across channels.

Use Value: Supports dynamic bandwidth reconfiguration (e.g., 1 kHz → 10 kHz) with <1 µs settling; 5 ppm/°C tempco prevents thermal detuning during extended operation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD5292BRUZ-50-RL7	Same 50 kΩ RAB and 10-bit resolution, but only ±20% RAB tolerance in normal mode; no R-perf mode or 1% calibration.	Lacks precision calibration capability; unsuitable for open-loop sensor offset correction or gain-critical instrumentation.	Select when cost sensitivity outweighs tolerance requirements and external calibration is acceptable.
MAX5487ETE+T	100 kΩ RAB, I²C interface, ±20% RAB tolerance, 5 ppm/°C divider tempco, but no R-perf mode or wiper readback.	Requires external trimming for precision applications; lacks SPI compatibility and real-time wiper verification.	Choose for I²C-based systems needing lower pin count and moderate accuracy, not for high-reliability calibration loops.

Compared with AD5292BRUZ-50-RL7 and MAX5487ETE+T, the AD5293BRUZ-50-RL7 uniquely delivers verified ±1% RAB tolerance with readback and SPI timing control-enabling uncalibrated deployment in medical sensor modules and aerospace-grade power management where traceable resistance accuracy is mandatory.

Availability

AD5293BRUZ-50-RL7 is available at Aetrix Electronics and suitable for instrumentation gain adjustment, programmable power supplies, and sensor calibration requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for AD5293BRUZ-50-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD5293 is part of Analog Devices' precision digital potentiometer product line, engineered for high-voltage, high-accuracy analog control in industrial, medical, and test equipment where mechanical potentiometer reliability and calibration drift are unacceptable.

FAQ

What is the maximum operating voltage for AD5293BRUZ-50-RL7?

The AD5293BRUZ-50-RL7 supports a maximum terminal voltage of VDD − VSS = 35 V, with absolute ratings of −0.3 V to +35 V on VDD relative to GND and +0.3 V to −25 V on VSS relative to GND. In practice, it operates reliably from ±9 V to ±16.5 V dual supply or 9 V to 33 V single supply, as specified in the Electrical Characteristics tables.

Does AD5293BRUZ-50-RL7 support wiper position readback?

Yes, the AD5293BRUZ-50-RL7 provides wiper setting readback via its SDO pin. When a read command is issued through the SPI interface, the current 10-bit RDAC register value is shifted out on SDO, enabling firmware verification of programmed resistance position-critical for safety-critical or self-calibrating systems.

How does resistor performance (R-perf) mode differ from normal mode in AD5293BRUZ-50-RL7?

In R-perf mode, the AD5293BRUZ-50-RL7 restricts valid wiper codes to a subset (e.g., 0x08C–0x3FF for RWB) that guarantees ±1% end-to-end resistance tolerance; normal mode permits full 0x000–0x3FF range but with ±20% RAB tolerance. R-perf mode sacrifices 12% of usable codes for metrological-grade accuracy.

What is the purpose of the EXT_CAP pin on AD5293BRUZ-50-RL7?

EXT_CAP on the AD5293BRUZ-50-RL7 connects to an external 1 µF capacitor (≥7 V rating) that stabilizes the internal bandgap reference used for resistor calibration. This capacitor reduces code-dependent temperature coefficient variation and improves long-term resistance stability-omitting it degrades R-perf mode accuracy and tempco performance.

Can AD5293BRUZ-50-RL7 operate with a 3.3 V logic supply while using ±15 V analog supplies?

Yes, the AD5293BRUZ-50-RL7 supports independent logic and analog supplies: VLOGIC may be 2.7 V to 5.5 V (including 3.3 V), while VDD/VSS operate from ±9 V to ±16.5 V. Digital inputs (SYNC, SCLK, DIN) are referenced to VLOGIC, and SDO/RDY outputs are open-drain with VLOGIC pull-up-ensuring clean level translation.

AD5293BRUZ-50-RL7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 14-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Taper:: Linear

Configuration:: Potentiometer

Number of Circuits:: 1

Number of Taps:: 1024

Resistance (Ohms):: 50k

Interface:: SPI

Memory Type:: Volatile

Voltage - Supply:: 9V ~ 33V, ±9V ~ 16.5V

Features:: Cascade Pin

Tolerance:: ±1%

Temperature Coefficient (Typ):: 35ppm/°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 14-TSSOP

Operating Temperature:: -40°C ~ 105°C

Resistance - Wiper (Ohms) (Typ):: 60

AD5293BRUZ-50-RL7 FAQ

1.How can I place an order for AD5293BRUZ-50-RL7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AD5293BRUZ-50-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 AD5293BRUZ-50-RL7 reliable?

The price and inventory of AD5293BRUZ-50-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5293BRUZ-50-RL7 is usually 5 days.

3.What payment methods are accepted for AD5293BRUZ-50-RL7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5293BRUZ-50-RL7 transactions.

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AD5293BRUZ-50-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD5293BRUZ-50-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 AD5293BRUZ-50-RL7?

For technical support, including AD5293BRUZ-50-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5293BRUZ-50-RL7 requirements.

6.How does Aetrix verify that AD5293BRUZ-50-RL7 is sourced from the original manufacturer or authorized distributors?

All AD5293BRUZ-50-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 AD5293BRUZ-50-RL7 meets industry standards.

7.What is the process for return or replacement of AD5293BRUZ-50-RL7?

All AD5293BRUZ-50-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD5293BRUZ-50-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 AD5293BRUZ-50-RL7 part is unused and in its original packaging.

Return procedure for AD5293BRUZ-50-RL7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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