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Analog Devices Inc. AD8400AR10-REEL
- Part No.:
- AD8400AR10-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8400AR10-REEL.pdf
- Description:
- IC DGTL POT 10KOHM 256TAP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,184
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Product details
Overview
AD8400AR10-REEL from Analog Devices is a single-channel, 256-position digital potentiometer in SOIC-8 package, offering 10 kΩ nominal end-to-end resistance, ±1% channel matching, and 500 ppm/°C temperature coefficient. It operates from 2.7 V to 5.5 V, supports SPI-compatible 3-wire serial interface, and delivers 2 μs wiper settling time - used for precision gain/offset trimming in industrial sensor signal chains.
For engineers reviewing the AD8400AR10-REEL datasheet, AD8400AR10-REEL pinout, AD8400AR10-REEL application, or AD8400AR10-REEL equivalent, key selection criteria include guaranteed monotonicity (±1/4 LSB DNL), microwatt shutdown (<5 μA), 10 MHz update rate, and automotive-qualified operation from −40°C to +125°C.
Technical Context
The AD8400AR10-REEL implements a digitally controlled variable resistor using a segmented thin-film resistor ladder with CMOS switch matrix, avoiding make-before-break or break-before-make transitions via proprietary switching circuitry. Its 8-bit latch accepts 10-bit serial words (2 address + 8 data bits) for channel selection and wiper position.
It functions in both rheostat (two-terminal) and potentiometer (three-terminal) modes, with independent A–W and W–B resistance variation linearly proportional to code. The SHDN pin forces A-terminal open-circuit and shorts W to B, enabling <5 μA standby current while preserving latch state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Resistance | 10 kΩ ±20% at 25°C - sets full-scale analog range for voltage divider or current-limiting applications. |
| Resolution | 8-bit (256 positions) - enables 0.39% incremental adjustment granularity across full resistance range. |
| Resistance Tempco | 500 ppm/°C - ensures stable gain/attenuation over industrial temperature range (−40°C to +125°C). |
| Wiper Settling Time | 2 μs (±1% error band) - supports real-time calibration loops with >100 kHz update rates. |
| Supply Range | 2.7 V to 5.5 V single supply - interoperable with 3.3 V and 5 V logic and analog systems without level shifting. |
| Shutdown Current | <5 μA - enables battery-powered or energy-sensitive designs to retain configuration during sleep mode. |
| Interface | SPI-compatible 3-wire (CS, CLK, SDI), 10 MHz max clock - simplifies microcontroller integration with minimal GPIO usage. |
Pinout & Package
AD8400AR10-REEL is housed in an 8-lead SOIC surface-mount package (JEDEC MS-012AC, 3.9 mm × 4.9 mm × 1.75 mm). Pin 1 is B1 (terminal B of RDAC), Pin 2 is GND, Pin 3 is CS, Pin 4 is SDI, Pin 5 is CLK, Pin 6 is VDD, Pin 7 is W1 (wiper), and Pin 8 is A1 (terminal A of RDAC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| B1 | RDAC terminal B | Fixed endpoint of 10 kΩ resistor; referenced as low-side node in rheostat or potentiometer configurations. |
| GND | Digital/analog ground | Common reference for VDD, digital inputs, and internal logic; must be low-impedance connection. |
| CS | Chip select input | Active-low enable for serial register loading; rising edge latches decoded address/data into target latch. |
| SDI | Serial data input | Accepts 10-bit word (A1,A0,D7–D0); synchronous to CLK rising edge for deterministic timing. |
| CLK | Serial clock input | Positive-edge-triggered clock up to 10 MHz; defines data capture window and internal update timing. |
| VDD | Positive supply | Single 2.7–5.5 V rail powering digital core and analog resistor array; no separate analog/digital supplies required. |
| W1 | RDAC wiper output | Adjustable tap point between A1 and B1; provides programmable voltage division or variable resistance path. |
| A1 | RDAC terminal A | Fixed endpoint of 10 kΩ resistor; serves as high-side node or current source connection point. |
Key Features
| Feature | Design Value |
|---|---|
| 256-step monotonic operation | Guaranteed ±1/4 LSB differential nonlinearity ensures no code-dependent gain errors in closed-loop calibration. |
| Automotive qualification | Qualified per AEC-Q100 Grade 1 (−40°C to +125°C), enabling use in engine control, ADAS sensor modules, and infotainment power management. |
| Zero-power shutdown | SHDN pin reduces supply current to <5 μA while retaining wiper position; resumes prior setting on wake-up. |
| Channel-to-channel matching | ±1% RAB tolerance across channels - critical for multi-channel gain-matching in instrumentation amplifiers or audio panning circuits. |
| No glitch switching | Proprietary switch architecture eliminates transient spikes during wiper transitions, preventing DAC output disturbance in sensitive analog paths. |
Applications
| Programmable Sensor Gain Calibration | Industrial Power Supply Trim |
|---|---|
Use Scenario: Adjusting gain of a bridge sensor amplifier in a pressure transducer operating across −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Digital potentiometer configured as a two-terminal rheostat in the amplifier feedback loop to set precise gain ratio. Use Value: Enables field-updatable calibration without mechanical trimmer replacement; 500 ppm/°C tempco maintains accuracy over full temperature range. |
Use Scenario: Fine-tuning output voltage of a 24 V industrial DC-DC converter with remote sense capability. IC Role / Device Role / Timing Role: Three-terminal potentiometer divider replacing mechanical trimmer in the feedback network of an isolated flyback controller. Use Value: Supports factory-programmed output voltage bins and post-manufacture recalibration via MCU command, eliminating manual adjustment labor. |
| Audio Channel Panning Control | Line Impedance Matching Network |
Use Scenario: Implementing stereo panning in a professional audio mixer's analog signal path with microcontroller-based UI. IC Role / Device Role / Timing Role: Dual-ratio voltage divider (A–W–B) controlling relative attenuation of left/right channel signals before summing. Use Value: Provides smooth, click-free volume transition (2 μs settling) and eliminates mechanical wear, dust sensitivity, and channel imbalance drift. |
Use Scenario: Dynamically matching termination impedance of RS-485 communication lines to varying cable lengths and stub configurations. IC Role / Device Role / Timing Role: Rheostat-mode digital potentiometer placed in series with receiver input to adjust effective termination resistance. Use Value: Compensates for signal integrity degradation due to impedance mismatch; 10 kΩ value aligns with standard RS-485 bus design guidelines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP41010-I/P | 10 kΩ, 256-tap, SPI interface, but only rated for −40°C to +85°C industrial range (not automotive-qualified). | Lacks AEC-Q100 qualification and higher tempco (600 ppm/°C vs. 500 ppm/°C), limiting use in under-hood automotive sensors. | Choose when cost sensitivity outweighs extended temperature or automotive compliance requirements. |
| AD5204BRUZ10 | Quad-channel 10 kΩ digital potentiometer in TSSOP-24; same 256-step resolution and 500 ppm/°C tempco, but requires additional PCB area and routing. | Supports four independent channels - suitable for multi-channel gain calibration but over-specified for single-channel needs like AD8400AR10-REEL use cases. | Prefer when consolidating multiple potentiometers onto one IC to reduce BOM count and layout complexity. |
Compared with MCP41010-I/P and AD5204BRUZ10, AD8400AR10-REEL uniquely balances single-channel simplicity, automotive qualification, and compact SOIC-8 footprint - making it optimal for space-constrained, high-reliability industrial and automotive trimming applications where channel count and extended temperature operation are decisive.
Availability
AD8400AR10-REEL is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive ECU trimming, and programmable power supply adjustment requiring stable component supply across long production lifecycles.
Supply support for AD8400AR10-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 series belongs to Analog Devices' precision digital potentiometer product line, designed specifically for replacing mechanical trimmers in harsh-environment applications demanding reliability, temperature stability, and programmability.
FAQ
What is the maximum operating temperature range for the AD8400AR10-REEL?
The AD8400AR10-REEL is qualified for operation from −40°C to +125°C and meets AEC-Q100 Grade 1 requirements. This extended industrial temperature range is verified across all electrical parameters in the datasheet, including resistance matching, tempco, and digital interface timing - making AD8400AR10-REEL suitable for under-hood automotive and high-ambient industrial environments.
Does the AD8400AR10-REEL support true three-terminal potentiometer operation?
Yes, the AD8400AR10-REEL supports full three-terminal potentiometer operation with independent A1–W1 and W1–B1 resistance variation. When configured as a voltage divider, it delivers monotonic output with ±1/2 LSB integral nonlinearity and 15 ppm/°C voltage-divider tempco at midscale - confirmed in Table 1 of the AD8400/AD8402/AD8403 Rev. E datasheet.
Can the AD8400AR10-REEL be used in rheostat mode with only two terminals connected?
Yes, AD8400AR10-REEL operates reliably in two-terminal rheostat mode (e.g., A1–W1 or W1–B1). In this configuration, it maintains ±1/4 LSB differential nonlinearity and supports continuous terminal currents up to ±2.1 mA for the 10 kΩ version - sufficient for most gain-setting and bias-current applications without external buffering.
Is the AD8400AR10-REEL pin-compatible with other members of the AD8400 family?
No - AD8400AR10-REEL (SOIC-8) has a unique 8-pin pinout optimized for single-channel operation and is not pin-compatible with AD8402 (SOIC-14) or AD8403 (SOIC-24/TSSOP-24). Each variant uses distinct pin assignments for CS, SDI, CLK, and wiper terminals; direct PCB substitution is not possible without layout revision.
What happens to the wiper position during shutdown of the AD8400AR10-REEL?
When SHDN is asserted low, AD8400AR10-REEL opens the A1 terminal and shorts W1 to B1, entering micropower shutdown (<5 μA). Crucially, the internal 8-bit latch retains its last programmed code. Upon returning SHDN high, the wiper immediately resumes the exact prior resistance setting - no reinitialization or host reload is required.
AD8400AR10-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 256
- Resistance (Ohms):
- 10k
- Interface:
- SPI
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- -
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- 500ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 200
AD8400AR10-REEL FAQ
1.How can I place an order for AD8400AR10-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8400AR10-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 AD8400AR10-REEL reliable?
The price and inventory of AD8400AR10-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8400AR10-REEL is usually 5 days.
3.What payment methods are accepted for AD8400AR10-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8400AR10-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8400AR10-REEL?
AD8400AR10-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8400AR10-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 AD8400AR10-REEL?
For technical support, including AD8400AR10-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8400AR10-REEL requirements.
6.How does Aetrix verify that AD8400AR10-REEL is sourced from the original manufacturer or authorized distributors?
All AD8400AR10-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 AD8400AR10-REEL meets industry standards.
7.What is the process for return or replacement of AD8400AR10-REEL?
All AD8400AR10-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8400AR10-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 AD8400AR10-REEL part is unused and in its original packaging.
Return procedure for AD8400AR10-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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