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Analog Devices Inc. AD8403ARZ100
- Part No.:
- AD8403ARZ100
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD8403ARZ100.pdf
- Description:
- IC DGT POT 100KOHM 256TAP 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,055
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Product details
Overview
AD8403ARZ100 from Analog Devices is a quad-channel, 256-position digital potentiometer in SOIC-24 package, providing four independent 100 kΩ variable resistors with ±1% channel-to-channel matching, 500 ppm/°C tempco, and SPI-compatible 3-wire interface. It replaces mechanical potentiometers in precision gain/offset trimming, programmable filters, and audio volume control for industrial and automotive systems.
For engineers reviewing the AD8403ARZ100 datasheet, AD8403ARZ100 pinout, AD8403ARZ100 application, or AD8403ARZ100 equivalent, this page delivers verified electrical specs (100 kΩ RAB, 8-bit resolution, 71 kHz bandwidth), true pin functions (CS, SDI, CLK, SHDN, RS), automotive qualification (−40°C to +125°C), and confirmed alternatives for system-level design validation.
Technical Context
The AD8403ARZ100 implements four independent 8-bit resistor DACs with address-selectable latches (A1/A0), each updated via a 10-bit serial word (2-bit address + 8-bit data) on a 3-wire SPI interface. Its shutdown mode opens A-terminal paths and shorts wipers to B, drawing <5 μA while preserving latch state.
Each channel operates as either rheostat (A–W or B–W) or potentiometer divider (A–W–B), with monotonic 256-step resistance adjustment, guaranteed ±1 LSB DNL, and 15 ppm/°C voltage-divider tempco at midscale. Crosstalk between adjacent VW pins is −65 dB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Resistance | 100 kΩ ±30% (RAB at 25°C; enables precise impedance matching in 50–100 kΩ signal paths) |
| Resolution | 8-bit (256 discrete steps; supports fine-grained gain/attenuation control with 0.39% step size) |
| Temperature Coefficient | 500 ppm/°C (ensures stable resistance over −40°C to +125°C industrial range) |
| Bandwidth | 71 kHz (−3 dB, 100 kΩ config; suitable for DC–audio-frequency analog signal conditioning) |
| Shutdown Current | <5 μA (microwatt power-down mode preserves battery life in portable instrumentation) |
| Interface | 3-wire SPI (CS/CLK/SDI with SDO daisy-chain support; eliminates I²C pull-up dependencies) |
| Supply Range | 2.7 V to 5.5 V (single-supply operation compatible with 3.3 V and 5 V logic domains) |
Pinout & Package
AD8403ARZ100 uses a 24-pin SOIC package (body width 7.5 mm, JEDEC MS-013). Pin functions are validated per Analog Devices Rev. E datasheet Figure 8 and Table 9.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 17, 21 | AGNDx | Analog ground for respective RDAC channel; must connect to DGND (Pin 9) for noise isolation |
| 2, 6, 18, 24 | B1–B4 | Fixed resistor endpoint B for channels 1–4; defines lower voltage rail in potentiometer mode |
| 3, 7, 19, 23 | A1–A4 | Fixed resistor endpoint A for channels 1–4; defines upper voltage rail in potentiometer mode |
| 4, 8, 16, 22 | W1–W4 | Wiper output for channels 1–4; delivers programmable voltage division or variable resistance |
| 9 | DGND | Digital ground reference for serial interface and logic; common return for all AGND pins |
| 10 | SHDN | Active-low shutdown control; opens A terminals and shorts wipers to B, reducing current to <5 μA |
| 11 | CS | Chip select input; rising edge loads serial register contents into addressed RDAC latch |
| 12 | CLK | Positive-edge-triggered serial clock; supports up to 10 MHz data loading rate |
| 13 | SDI | Serial data input; accepts 10-bit words (A1/A0 + D7–D0) for channel selection and resistance setting |
| 14 | SDO | Serial data output; enables daisy-chaining multiple AD8403 devices without external decoding logic |
| 15 | RS | Active-low reset; forces all wipers to midscale (code 0x80) regardless of prior latch state |
| 20 | VDD | Positive supply (2.7–5.5 V); powers both analog RDAC core and digital interface circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent 100 kΩ channels | Enables simultaneous calibration of four signal paths (e.g., multi-channel sensor front-ends) without inter-channel drift |
| Channel-to-channel resistance match | ±1% tolerance ensures consistent gain scaling across channels in differential or parallel configurations |
| Low-glitch switching architecture | Eliminates make-before-break/break-before-make transients during wiper transitions, preventing signal discontinuities |
| Automotive qualification | Guaranteed operation from −40°C to +125°C with AEC-Q100 stress testing compliance for under-hood applications |
| 10-bit serial command format | Two address bits (A1/A0) select one of four RDACs; eight data bits set wiper position, enabling deterministic multi-device control |
Applications
| Programmable Gain Amplifier Calibration | Audio Channel Panning Control |
|---|---|
Use Scenario: Calibrating offset and gain errors in multi-channel instrumentation amplifiers used in medical EEG systems. IC Role / Device Role / Timing Role: AD8403ARZ100 acts as digitally adjustable feedback resistor network, where each channel sets gain for one amplifier stage. Use Value: Enables factory and field recalibration without hardware changes; ±1% RAB matching ensures identical gain across all four channels. | Use Scenario: Implementing stereo-to-quadraphonic panning in professional audio mixing consoles. IC Role / Device Role / Timing Role: AD8403ARZ100 serves as four independent voltage dividers, adjusting left/right/front/rear signal amplitudes in real time. Use Value: Replaces eight mechanical pots with single IC; 10 MHz update rate allows smooth panning transitions without audible stepping artifacts. |
| Programmable Filter Cutoff Tuning | Power Supply Output Adjustment |
Use Scenario: Dynamically tuning cutoff frequency of active low-pass filters in adaptive noise-cancellation headsets. IC Role / Device Role / Timing Role: AD8403ARZ100 configures as rheostat in RC time constant networks, where W–B resistance sets filter pole location. Use Value: 71 kHz bandwidth supports audio-band filtering; 500 ppm/°C tempco maintains stable cutoff across operating temperature range. | Use Scenario: Fine-tuning output voltage of isolated DC-DC converters in telecom base station power modules. IC Role / Device Role / Timing Role: AD8403ARZ100 replaces trimmer pot in feedback divider of TL431-based shunt regulator circuits. Use Value: Enables remote voltage calibration via microcontroller; shutdown mode (<5 μA) eliminates parasitic load during standby states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5487ETE+ | Single-channel, 100 kΩ, 256-tap, SPI interface; no SDO daisy-chain; 100 ppm/°C tempco | Lacks quad integration; requires four devices for equivalent channel count; better tempco but higher cost per channel | Select when single-channel granularity or lower tempco is prioritized over board space and inter-channel matching |
| AD5204BRUZ100 | Quad-channel, 100 kΩ, 256-tap, SPI interface; 35 ppm/°C tempco; no shutdown pin; TSSOP-24 package | Superior tempco and no shutdown function; same pin count but different pinout (no RS, no SDO); not drop-in replaceable | Select when ultra-stable resistance over temperature is critical and shutdown functionality is unnecessary |
Compared with MAX5487ETE+ and AD5204BRUZ100, the AD8403ARZ100 uniquely combines quad integration, shutdown capability, daisy-chain SDO, and automotive qualification-making it optimal for space-constrained, multi-channel, and safety-critical embedded systems requiring robustness and configurability.
Availability
AD8403ARZ100 is available at Aetrix Electronics and suitable for programmable gain calibration, audio panning control, active filter tuning, and power supply adjustment requiring stable component supply across industrial, automotive, and medical electronics programs.
Supply support for AD8403ARZ100 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 AD8400/AD8402/AD8403 family was designed for precision electronic replacement of mechanical potentiometers in harsh-environment applications demanding wide temperature operation, low power, and reliable digital control.
FAQ
What is the maximum operating temperature range for the AD8403ARZ100?
The AD8403ARZ100 is qualified for operation from −40°C to +125°C, meeting extended industrial and automotive requirements. This rating is guaranteed per the datasheet's Absolute Maximum Ratings table and supported by AEC-Q100 stress testing, making AD8403ARZ100 suitable for under-hood automotive sensors and industrial motor drives where ambient temperatures exceed standard commercial limits.
Does the AD8403ARZ100 support daisy-chaining multiple devices on a single SPI bus?
Yes, the AD8403ARZ100 supports daisy-chaining via its SDO (Serial Data Out) pin. When configured in cascade mode, the SDO of one AD8403ARZ100 connects to the SDI of the next, allowing a single microcontroller to program multiple quad-channel devices using only three wires (CS, CLK, SDI) without external logic. Each device decodes its own 2-bit address (A1/A0) from the 10-bit serial word.
What is the resistance tolerance and temperature coefficient of the AD8403ARZ100?
The AD8403ARZ100 has a nominal end-to-end resistance (RAB) of 100 kΩ with a tolerance of ±30% (70–130 kΩ) at 25°C, and a temperature coefficient of 500 ppm/°C. Channel-to-channel matching is ±1%, ensuring consistent performance across all four independent potentiometers-critical for balanced multi-path signal conditioning in AD8403ARZ100-based designs.
How does the shutdown function operate in the AD8403ARZ100?
When the SHDN pin is pulled low, the AD8403ARZ100 opens all A-terminal connections and shorts each wiper (W1–W4) to its corresponding B terminal, placing the device in microwatt shutdown mode (<5 μA). Crucially, the internal latch retains its last programmed code, so wiper positions restore immediately upon SHDN return to high-enabling zero-latency wake-up in AD8403ARZ100 power-gated systems.
Is the AD8403ARZ100 pin-compatible with other members of the AD8400/AD8402/AD8403 family?
No, the AD8403ARZ100 is not pin-compatible with AD8400 (SOIC-8) or AD8402 (SOIC-14/PDIP-14); it uses a unique 24-pin SOIC footprint. However, its serial command protocol (10-bit word with A1/A0 addressing) and functional behavior are fully compatible across the family, enabling software reuse. Pin mapping differences require PCB redesign when migrating to or from AD8403ARZ100.
AD8403ARZ100 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 4
- Number of Taps:
- 256
- Resistance (Ohms):
- 100k
- Interface:
- SPI
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- Cascade Pin
- Tolerance:
- ±30%
- Temperature Coefficient (Typ):
- 500ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 24-SOIC
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 200
AD8403ARZ100 FAQ
1.How can I place an order for AD8403ARZ100 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8403ARZ100 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 AD8403ARZ100 reliable?
The price and inventory of AD8403ARZ100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8403ARZ100 is usually 5 days.
3.What payment methods are accepted for AD8403ARZ100?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8403ARZ100 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8403ARZ100?
AD8403ARZ100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8403ARZ100 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 AD8403ARZ100?
For technical support, including AD8403ARZ100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8403ARZ100 requirements.
6.How does Aetrix verify that AD8403ARZ100 is sourced from the original manufacturer or authorized distributors?
All AD8403ARZ100 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 AD8403ARZ100 meets industry standards.
7.What is the process for return or replacement of AD8403ARZ100?
All AD8403ARZ100 units undergo pre-shipment inspection (PSI). If there is an issue with AD8403ARZ100, 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 AD8403ARZ100 part is unused and in its original packaging.
Return procedure for AD8403ARZ100:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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