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Analog Devices Inc. AD5293BRUZ-100-RL7
- Part No.:
- AD5293BRUZ-100-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD5293BRUZ-100-RL7.pdf
- Description:
- IC DGTL POT 100KOHM 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,220
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Product details
Overview
AD5293BRUZ-100-RL7 from Analog Devices is a single-channel, 1024-position digital potentiometer with 100 kΩ nominal resistance, ±1% end-to-end resistor tolerance in resistor performance mode, and 5 ppm/°C voltage divider temperature coefficient. It operates from ±9 V to ±16.5 V dual supply or 9 V to 33 V single supply, features SPI-compatible serial interface with wiper readback, and targets precision gain/offset calibration in industrial instrumentation.
For engineers reviewing the AD5293BRUZ-100-RL7 datasheet, AD5293BRUZ-100-RL7 pinout, AD5293BRUZ-100-RL7 application, or AD5293BRUZ-100-RL7 equivalent, key selection criteria include guaranteed 1% RAB tolerance at full scale, 10-bit resolution with monotonicity, high-voltage terminal rating (VSS to VDD), and resistor performance mode code range validation for 100 kΩ variants.
Technical Context
The AD5293BRUZ-100-RL7 implements a digitally controlled, laser-trimmed thin-film resistor array with wiper-switch architecture enabling both rheostat and potentiometer divider configurations. Its RDAC register supports 16-bit SPI framing with SYNC-synchronized write/read operations and hardware RESET for midscale initialization.
Resistor performance mode restricts valid wiper codes to ranges ensuring ±1% RAB tolerance-e.g., for 100 kΩ versions at |VDD−VSS| = 21–26 V, RWB codes span 0x064–0x3FF and RWA codes span 0x000–0x39B. Temperature coefficients are specified separately for rheostat (35 ppm/°C) and voltage divider (5 ppm/°C) operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit (1024 positions): enables 0.1% incremental adjustment granularity across full resistance range. |
| Nominal Resistance | 100 kΩ: defines end-to-end resistance between A and B terminals; determines current-handling limit (±2 mA continuous). |
| Resistor Tolerance | ±1% in R-perf mode: eliminates need for external calibration in open-loop gain-setting applications. |
| Voltage Divider Tempco | 5 ppm/°C: ensures stable division ratio over −40°C to +105°C, critical for sensor signal conditioning. |
| Supply Range | Single: 9–33 V; Dual: ±9 V to ±16.5 V: supports direct integration into high-voltage analog front-ends without level-shifting. |
| Interface | SPI-compatible (CPOL=0, CPHA=1): enables daisy-chaining via SDO and supports wiper position readback for closed-loop verification. |
| Bandwidth | 105 kHz (−3 dB, RAB = 100 kΩ): sets maximum usable frequency for AC-coupled programmable gain stages. |
Pinout & Package
AD5293BRUZ-100-RL7 is housed in a 14-lead TSSOP package (4.4 mm × 5.0 mm × 1.2 mm height) rated for −40°C to +105°C operation. Pin 1 is RESET; pins 3 (A), 4 (W), and 5 (B) form the resistive element terminals; pins 6 (VDD), 2 (VSS), and 8 (VLOGIC) provide independent power domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Asynchronous hardware reset | Active-high signal forcing RDAC register to midscale (0x200); tie to VLOGIC if unused. |
| 2 (VSS) | Negative supply rail | Reference for bipolar operation; must be decoupled with 0.1 µF + 10 µF capacitors. |
| 3 (A) | Resistor terminal A | Fixed end of 100 kΩ resistor string; supports voltage up to VDD or down to VSS. |
| 4 (W) | Wiper output | Digitally positioned tap; delivers adjustable voltage/current; max 2 mA continuous current. |
| 5 (B) | Resistor terminal B | Fixed end opposite A; polarity agnostic relative to A and W for bipolar signal routing. |
| 6 (VDD) | Positive supply rail | High-voltage analog supply (up to +33 V); requires local 0.1 µF + 10 µF decoupling. |
| 7 (EXT_CAP) | External capacitor connection | Requires 1 µF ≥7 V capacitor to stabilize internal reference; no internal cap provided. |
| 8 (VLOGIC) | Digital logic supply | 2.7–5.5 V domain for SPI interface; isolated from analog supplies to minimize noise coupling. |
| 9 (GND) | Logic ground reference | Separate from analog power grounds; connects to system digital ground plane. |
| 10 (DIN) | Serial data input | 16-bit SPI frame input (MSB first); clocked on SCLK falling edge per CPOL=0/CPHA=1 protocol. |
| 11 (SCLK) | Serial clock input | Up to 50 MHz clock; falling edge triggers DIN sampling and internal register update timing. |
| 12 (SYNC) | Frame synchronization | Falling edge enables shift register; rising edge after 16 clocks commits data to RDAC register. |
| 13 (SDO) | Serial data output | Open-drain output requiring external pull-up; used for readback or daisy-chain cascading. |
| 14 (RDY) | Operation completion flag | Active-high open-drain signal indicating end of write/read execution (max 1.5 ms for reset). |
Key Features
| Feature | Design Value |
|---|---|
| 1% end-to-end resistor tolerance | Guaranteed in resistor performance mode across full temperature range, enabling uncalibrated open-loop designs. |
| 5 ppm/°C voltage divider tempco | Minimizes drift in precision ratiometric circuits such as programmable sensor excitation or reference scaling. |
| High-voltage terminal rating | A/B/W terminals support full VSS to VDD swing (up to 35 V differential), allowing direct use in ±15 V op-amp stages. |
| Wiper position readback | Enables real-time verification of programmed setting via SPI read command, supporting fault-tolerant systems. |
| Resistor performance mode | Configurable operating mode restricting wiper codes to validated ranges that maintain ±1% RAB tolerance. |
| 14-lead TSSOP package | Compact surface-mount footprint compatible with automated assembly and thermal performance (θJA = 931°C/W). |
Applications
| Instrumentation Gain Calibration | Programmable Power Supply |
|---|---|
Use Scenario: Adjusting gain of a precision instrumentation amplifier in automated test equipment to compensate for sensor sensitivity variations. IC Role / Device Role / Timing Role: Digital potentiometer configured as a two-terminal rheostat in the amplifier's feedback path to set closed-loop gain. Use Value: Eliminates manual trimmer replacement and provides repeatable, software-controlled calibration traceability across production units. |
Use Scenario: Setting output voltage of a high-accuracy, adjustable bench power supply using a DAC-controlled reference buffer. IC Role / Device Role / Timing Role: Potentiometer divider between reference voltage and ground, feeding adjustable voltage to error amplifier input. Use Value: Achieves <1% initial accuracy and <5 ppm/°C stability without external trimming, meeting Class I lab-grade specifications. |
| Sensor Offset Adjustment | Programmable Filter Time Constant |
Use Scenario: Nulling DC offset in bridge-based pressure transducer signal chains prior to ADC digitization. IC Role / Device Role / Timing Role: Rheostat connected between transducer output and op-amp inverting input to inject compensating current. Use Value: Enables factory and field recalibration via firmware, reducing calibration labor and improving long-term zero stability. |
Use Scenario: Tuning cutoff frequency of a second-order active low-pass filter in medical ECG front-end design. IC Role / Device Role / Timing Role: Variable resistor in RC network defining filter pole location; operated in potentiometer mode with fixed capacitor. Use Value: Allows dynamic bandwidth adaptation during different acquisition modes (e.g., diagnostic vs. monitoring) without hardware change. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5292BRUZ-100-RL7 | 10-bit, 100 kΩ, but only ±8% nominal resistor tolerance in normal mode; no resistor performance mode. | Lacks guaranteed 1% tolerance and low-tempco voltage divider mode; suitable only where calibration is performed externally. | Select when cost sensitivity outweighs need for factory-trimmed tolerance and higher tempco is acceptable. |
| MAX5487ETE+T | 10-bit, 100 kΩ, ±20% end-to-end tolerance, I²C interface, 2.7–5.5 V supply only. | No high-voltage capability (max 5.5 V); incompatible with ±15 V signal chains; lacks wiper readback. | Choose for low-voltage, space-constrained designs where I²C bus integration is preferred over SPI. |
Compared with AD5292BRUZ-100-RL7 and MAX5487ETE+T, AD5293BRUZ-100-RL7 uniquely delivers factory-guaranteed 1% RAB tolerance with 5 ppm/°C voltage divider stability and ±16.5 V dual-supply operation-enabling calibration-free, high-accuracy analog tuning in industrial and test equipment.
Availability
AD5293BRUZ-100-RL7 is available at Aetrix Electronics and suitable for instrumentation gain calibration, programmable power supply design, and sensor offset adjustment requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for AD5293BRUZ-100-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 electronic adjustment tasks in industrial instrumentation, test equipment, and sensor interface systems.
FAQ
What is the guaranteed resistor tolerance for AD5293BRUZ-100-RL7 in resistor performance mode?
The AD5293BRUZ-100-RL7 guarantees ±1% end-to-end resistor tolerance (RAB) in resistor performance mode across the full operating temperature range of −40°C to +105°C. This tolerance is achieved by restricting wiper codes to validated ranges-for example, at |VDD−VSS| = 21–26 V, RWB codes span 0x064–0x3FF and RWA codes span 0x000–0x39B. The specification is production-tested and applies specifically to the 100 kΩ variant.
Does AD5293BRUZ-100-RL7 support dual-supply operation, and what are the limits?
Yes, AD5293BRUZ-100-RL7 supports true dual-supply operation from ±9 V to ±16.5 V, enabling ground-referenced bipolar signal adjustment. Terminal voltages VA, VB, and VW may swing independently between VSS and VDD, with absolute maximum ratings of −25 V on VSS and +35 V on VDD relative to GND. The device maintains full 10-bit resolution and ±1% RAB tolerance across this range when operated in resistor performance mode.
How does the voltage divider temperature coefficient of AD5293BRUZ-100-RL7 compare to its rheostat mode tempco?
The AD5293BRUZ-100-RL7 specifies a 5 ppm/°C voltage divider temperature coefficient (measured at half-scale code) versus 35 ppm/°C for rheostat mode. This 7× improvement reflects optimized layout and trimming for ratiometric applications like programmable references or sensor excitation, where stable division ratio matters more than absolute resistance value stability.
Can AD5293BRUZ-100-RL7 wiper position be read back, and how is it implemented?
Yes, AD5293BRUZ-100-RL7 supports wiper position readback via its SPI interface. A dedicated read command transfers the current 10-bit RDAC register content out through the SDO pin, synchronized to SCLK. This allows real-time verification of programmed settings and supports closed-loop calibration routines without requiring external measurement equipment.
What external components are required for stable operation of AD5293BRUZ-100-RL7?
AD5293BRUZ-100-RL7 requires three mandatory external components: (1) a 1 µF capacitor rated ≥7 V connected to EXT_CAP pin for internal reference stabilization; (2) 0.1 µF ceramic + 10 µF bulk capacitors on VDD, VSS, and VLOGIC pins; and (3) an external pull-up resistor (typically 2.2 kΩ to VLOGIC) on SDO and RDY pins due to their open-drain outputs. No external trimming or calibration components are needed thanks to factory-trimmed 1% tolerance.
AD5293BRUZ-100-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):
- 100k
- 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-100-RL7 FAQ
1.How can I place an order for AD5293BRUZ-100-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5293BRUZ-100-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-100-RL7 reliable?
The price and inventory of AD5293BRUZ-100-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-100-RL7 is usually 5 days.
3.What payment methods are accepted for AD5293BRUZ-100-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5293BRUZ-100-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5293BRUZ-100-RL7?
AD5293BRUZ-100-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5293BRUZ-100-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-100-RL7?
For technical support, including AD5293BRUZ-100-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5293BRUZ-100-RL7 requirements.
6.How does Aetrix verify that AD5293BRUZ-100-RL7 is sourced from the original manufacturer or authorized distributors?
All AD5293BRUZ-100-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-100-RL7 meets industry standards.
7.What is the process for return or replacement of AD5293BRUZ-100-RL7?
All AD5293BRUZ-100-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD5293BRUZ-100-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-100-RL7 part is unused and in its original packaging.
Return procedure for AD5293BRUZ-100-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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