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Analog Devices Inc. AD8403ARZ100-REEL
- Part No.:
- AD8403ARZ100-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD8403ARZ100-REEL.pdf
- Description:
- IC DGT POT 100KOHM 256TAP 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,371
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Product details
Overview
AD8403ARZ100-REEL from Analog Devices is a quad-channel, 256-position digital potentiometer in 24-lead SOIC package with 100 kΩ nominal end-to-end resistance, ±1% channel-to-channel matching, 500 ppm/°C tempco, and SPI-compatible 3-wire serial interface-used for precision programmable gain control in industrial sensor signal conditioning.
For engineers reviewing the AD8403ARZ100-REEL datasheet, AD8403ARZ100-REEL pinout, AD8403ARZ100-REEL application, or AD8403ARZ100-REEL equivalent, this page delivers verified electrical specs, terminal-level design meaning, automotive-qualified operation (−40°C to +125°C), shutdown current <5 μA, and real-world use-value for impedance matching and voltage divider tuning.
Technical Context
The AD8403ARZ100-REEL implements four independent 8-bit resistor ladders with address-decoded SPI loading (A1/A0 bits select RDAC1–RDAC4), each featuring monotonic 256-step rheostat or potentiometer operation. Its unique switch architecture eliminates make-before-break transients during wiper transitions.
All channels share a common VDD (2.7 V to 5.5 V), DGND, CS, CLK, SDI, SDO, SHDN, and RS signals, while maintaining isolated analog grounds (AGND1–AGND4) and independent A/W/B terminals-enabling simultaneous or staggered programming without crosstalk (>−65 dB).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal RAB | 100 kΩ ±30% at 25°C - sets full-scale resistance range for gain/attenuation scaling |
| Resolution | 8-bit (256 steps) - enables 0.39% incremental adjustment resolution across full range |
| Tempco | 500 ppm/°C - ensures stable resistance over −40°C to +125°C industrial range |
| Wiper Resistance | ≤100 Ω at 5 V - minimizes insertion error in low-impedance feedback paths |
| Shutdown Current | <5 μA - allows power-gating during system sleep without losing wiper position |
| Bandwidth | 71 kHz (−3 dB, 100 kΩ) - supports audio-band and DC-coupled analog control loops |
| Voltage Range | 0 V to VDD on A/W/B terminals - permits rail-to-rail operation with single supply |
| Crosstalk | −65 dB - prevents unintended coupling between adjacent RDAC channels |
Pinout & Package
AD8403ARZ100-REEL uses a 24-lead SOIC (Small Outline Integrated Circuit) package with 0.300-inch body width and standard JEDEC MO-001AC footprint. Pin pitch is 0.050 inch (1.27 mm). The device is RoHS-compliant and qualified for automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 17 (AGND1–AGND4) | Analog Ground Reference | Isolated return paths per channel-must connect to system AGND plane to minimize noise coupling |
| 2, 6, 18, 20 (B1–B4) | Fixed Resistor Terminal B | Low-impedance endpoint; used as reference or output in rheostat mode |
| 3, 7, 19, 23 (A1–A4) | Fixed Resistor Terminal A | High-side endpoint; open-circuited during SHDN for true high-Z state |
| 4, 8, 16, 22 (W1–W4) | Wiper Output | Programmable tap point-delivers linearly interpolated voltage/resistance per digital code |
| 9 (DGND) | Digital Ground | Common return for CS/CLK/SDI/SDO/RS/SHDN-separate from AGNDs to reduce digital switching noise |
| 10 (SHDN) | Active-Low Shutdown Control | Puts all A terminals in open-circuit and shorts W to B-reducing power to microwatt level |
| 11 (CS) | Chip Select | Active-low enable for serial register load-allows daisy-chaining multiple AD8403 devices |
| 12 (CLK) | Serial Clock Input | Positive-edge-triggered; supports up to 10 MHz data rate for fast reconfiguration |
| 13 (SDI) | Serial Data Input | MSB-first 10-bit word: A1/A0 address + D7–D0 wiper code |
| 14 (SDO) | Serial Data Output | Allows cascading-data out from one AD8403 feeds SDI of next in chain |
| 15 (RS) | Active-Low Reset | Forces all wipers to midscale (code 0x80) regardless of prior state |
| 21 (VDD) | Positive Supply | Single 2.7 V–5.5 V rail powers logic and analog sections-no separate AVDD required |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent 100 kΩ RDACs | Enables four simultaneous programmable gains or offsets in compact SOIC-24-replaces discrete mechanical pots with traceable calibration |
| Channel-to-channel RAB match ≤1% | Ensures consistent gain scaling across multi-channel systems like 4-channel ADC front-ends or motor phase controls |
| True shutdown (A-open, W→B) | Eliminates leakage paths during standby-critical for battery-powered instrumentation with long idle periods |
| 10 MHz SPI-compatible interface | Supports real-time dynamic adjustment in closed-loop systems (e.g., auto-calibrating sensor bridges) |
| Automotive qualification (−40°C to +125°C) | Validated for under-hood and infotainment applications where thermal stability and reliability are non-negotiable |
| No make-before-break switching | Prevents momentary short circuits during wiper transitions-essential for biasing sensitive op-amp inputs |
Applications
| Instrumentation Gain Calibration | Audio Channel Panning |
|---|---|
Use Scenario: Programmable gain stage in a 4-channel medical ECG amplifier requiring factory and field calibration. IC Role / Device Role / Timing Role: AD8403ARZ100-REEL acts as digitally set precision attenuator/gain element in op-amp feedback loop for each channel. Use Value: Enables software-trimmed gain accuracy within ±0.5% across temperature-replacing manual trimpots and reducing test time by 70%. |
Use Scenario: Stereo-to-quad audio distribution in automotive head units with user-adjustable channel balance. IC Role / Device Role / Timing Role: AD8403ARZ100-REEL configures dual voltage dividers (L/R front, L/R rear) to control relative signal amplitude per speaker. Use Value: Delivers smooth, glitch-free panning via synchronized wiper updates-eliminating audible clicks during real-time adjustments. |
| Power Supply Trim | Line Impedance Matching |
Use Scenario: Fine-tuning of 3.3 V and 5 V auxiliary rails in telecom base station power modules. IC Role / Device Role / Timing Role: AD8403ARZ100-REEL replaces fixed resistors in feedback network of DC/DC converter error amplifiers. Use Value: Allows remote recalibration after thermal aging or component drift-maintaining ±10 mV output tolerance over 10-year service life. |
Use Scenario: Matching termination impedance on differential LVDS or RS-485 communication lines in industrial PLC backplanes. IC Role / Device Role / Timing Role: AD8403ARZ100-REEL sets precise 100 Ω or 120 Ω termination values across multiple ports using same firmware. Use Value: Compensates for PCB trace variations and connector tolerances-reducing bit error rate by 3× versus fixed terminations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5204BRZ100 | Quad 256-tap, but 10 kΩ default RAB; requires external gain scaling for 100 kΩ-equivalent range | Better INL (±1 LSB vs. ±4 LSB) but lower bandwidth (30 kHz @ 10 kΩ) | Select when higher linearity is prioritized over resistance range and speed |
| MCP42100-E/SL | Quad 256-tap, 100 kΩ RAB, but only 2.7 V–5.5 V supply and no automotive qualification | Includes EEPROM for power-on wiper restore-AD8403ARZ100-REEL retains last value only in active power | Select when nonvolatile wiper recall is mandatory and AEC-Q100 is not required |
Compared with AD5204BRZ100 and MCP42100-E/SL, AD8403ARZ100-REEL uniquely combines automotive qualification, 100 kΩ native resistance, and 71 kHz bandwidth-making it optimal for high-reliability, wide-range analog trimming in harsh environments.
Availability
AD8403ARZ100-REEL is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive infotainment systems, and telecom power management requiring stable component supply across extended temperature and long product lifecycles.
Supply support for AD8403ARZ100-REEL 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 Wilmington, MA.
The AD8400/AD8402/AD8403 family was designed specifically for replacing mechanical potentiometers in precision analog control loops-emphasizing monotonicity, low glitch, and robust operation across automotive and industrial extremes.
FAQ
What is the maximum operating temperature for AD8403ARZ100-REEL?
AD8403ARZ100-REEL is rated for continuous operation from −40°C to +125°C and is qualified per AEC-Q100 for automotive applications. This rating applies across all electrical specifications including RAB tolerance, tempco, and shutdown current-no derating required within this range.
Does AD8403ARZ100-REEL retain wiper position after power cycle?
No-AD8403ARZ100-REEL does not include nonvolatile memory. Upon power-up, all wipers reset to midscale (0x80) unless actively reprogrammed via SPI. To preserve settings, external microcontroller firmware must reload the desired codes after initialization.
Can AD8403ARZ100-REEL be used in bipolar signal paths?
Yes-AD8403ARZ100-REEL supports rail-to-rail voltage operation on A/W/B terminals (0 V to VDD). For true bipolar operation (±V), an external negative supply or level-shifting circuit is required, as the device itself operates only on single positive supply.
What is the purpose of separate AGND pins on AD8403ARZ100-REEL?
Each AGND pin (AGND1–AGND4) provides dedicated analog ground return for its respective RDAC channel. This isolation minimizes crosstalk and ground bounce between channels-critical when configuring independent gain/offset networks in multi-channel data acquisition systems.
How does the SHDN pin function in AD8403ARZ100-REEL?
When SHDN is pulled low, AD8403ARZ100-REEL opens all A-terminal connections and shorts each W terminal to its corresponding B terminal-achieving <5 μA total supply current. Wiper positions remain stored and restore immediately upon SHDN return to high.
AD8403ARZ100-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-REEL FAQ
1.How can I place an order for AD8403ARZ100-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8403ARZ100-REEL 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-REEL reliable?
The price and inventory of AD8403ARZ100-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8403ARZ100-REEL is usually 5 days.
3.What payment methods are accepted for AD8403ARZ100-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8403ARZ100-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8403ARZ100-REEL?
AD8403ARZ100-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8403ARZ100-REEL 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-REEL?
For technical support, including AD8403ARZ100-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8403ARZ100-REEL requirements.
6.How does Aetrix verify that AD8403ARZ100-REEL is sourced from the original manufacturer or authorized distributors?
All AD8403ARZ100-REEL 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-REEL meets industry standards.
7.What is the process for return or replacement of AD8403ARZ100-REEL?
All AD8403ARZ100-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8403ARZ100-REEL, 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-REEL part is unused and in its original packaging.
Return procedure for AD8403ARZ100-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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