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Analog Devices Inc. AD5206BRZ50
- Part No.:
- AD5206BRZ50
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD5206BRZ50.pdf
- Description:
- IC DGTL POT 50KOHM 256TAP 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,024
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Product details
Overview
AD5206BRZ50 from Analog Devices is a 6-channel, 256-position digital potentiometer with 50 kΩ end-to-end resistance, SPI-compatible 3-wire interface, ±2.7 V dual-supply or +2.7 V to +5.5 V single-supply operation, and midscale power-on reset-used for precision gain/offset adjustment in instrumentation and programmable filter tuning.
For engineers reviewing the AD5206BRZ50 datasheet, AD5206BRZ50 pinout, AD5206BRZ50 application, or AD5206BRZ50 equivalent, key selection factors include channel count (6), terminal resistance (50 kΩ), wiper settling time (9 μs at 50 kΩ), THD (0.004%), and SOIC-24/TSSOP-24 package compatibility.
Technical Context
The AD5206BRZ50 implements six independent, monotonic 8-bit digitally controlled variable resistors using a resistor ladder with CMOS switch matrix. Each channel accepts an 11-bit serial word (3 address + 8 data bits) via SPI-compatible CLK/CS/SDI, with address decoding (A2–A0) selecting one of six RDAC latches on CS high.
It supports both rheostat (W–B or W–A) and potentiometer divider modes, with guaranteed R-DNL ±0.25 LSB and R-INL ±0.5 LSB. Temperature coefficient is 700 ppm/°C for RAB and 15 ppm/°C for voltage divider output, enabling stable ratio-based applications over −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 6 independent, individually addressable RDACs |
| Resolution | 8-bit (256 positions), monotonic per channel |
| Terminal Resistance | 50 kΩ ±30% at 25°C; defines max current handling (±2.5 mA continuous) |
| Supply Range | +2.7 V to +5.5 V single supply or ±2.7 V dual supply; enables mixed-voltage system integration |
| Wiper Settling Time | 9 μs to ±1 LSB at 50 kΩ; determines minimum update rate in closed-loop control |
| THD | 0.004% at 1 kHz; ensures low distortion in audio and signal conditioning paths |
| Tempco (RAB) | 700 ppm/°C; impacts absolute resistance stability across temperature |
| Tempco (VW) | 15 ppm/°C in divider mode; enables high-precision ratiometric voltage scaling |
Pinout & Package
AD5206BRZ50 is housed in a 24-lead SOIC (SOIC-24) surface-mount package, pin-compatible with TSSOP-24. Pin 1 is A6; pins 4 (GND), 5 (CS), 6 (VDD), 7 (SDI), 8 (CLK), 9 (VSS), and 24 (B4) are electrically defined per datasheet Figure 8 and Table 7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A6 | Fixed resistor endpoint (high side) | Connects to reference voltage or signal source; open-circuit in shutdown mode |
| B1–B6 | Fixed resistor endpoint (low side) | Typically grounded or tied to bias; remains connected to wiper during shutdown |
| W1–W6 | Digitally positioned wiper output | Delivers programmable resistance or voltage division point; 45 Ω typical contact resistance |
| CS | Chip select (active low) | Triggers latch loading after 11-bit serial shift; enables multi-device daisy-chaining |
| SDI | Serial data input (MSB first) | Accepts 3-bit address + 8-bit data; requires clean logic edges to prevent bit errors |
| CLK | Positive-edge clock input | Synchronizes serial bit transfer; min pulse width 20 ns |
| VDD / VSS | Power supply rails | Supports single- or dual-supply operation; |VDD| + |VSS| < 5.5 V constraint applies |
| GND | Digital ground reference | Common return for logic and internal circuitry; separate from analog ground in mixed-signal designs |
Key Features
| Feature | Design Value |
|---|---|
| 6-channel independence | Each RDAC has dedicated A/B/W terminals and retains its setting during power cycling or partial reprogramming |
| Midscale power-on preset | Wipers initialize to 0x80 (128/256) without external PR assertion-reduces startup transients in gain-control loops |
| 3-wire SPI interface | No protocol overhead or configuration registers; direct 11-bit serial load simplifies MCU firmware and reduces GPIO usage |
| Ratiometric voltage divider mode | Output drift reduced to 15 ppm/°C-enables stable reference scaling in ADC biasing and sensor excitation |
| Low THD (0.004%) | Preserves signal integrity in audio volume control and active filter tuning where harmonic distortion must be minimized |
| Shutdown mode (AD5204 only) | Not applicable to AD5206BRZ50-no SHDN pin; all channels remain active unless software-controlled via SPI |
Applications
| Instrumentation Gain Control | Programmable Filter Tuning |
|---|---|
Use Scenario: Adjusting gain of a precision op-amp stage in automated test equipment to calibrate measurement ranges across multiple input signals. IC Role / Device Role / Timing Role: Acts as digitally programmable feedback resistor in non-inverting amplifier topology; updated via SPI between measurements. Use Value: Eliminates manual trim pots and enables remote recalibration; 50 kΩ value matches standard op-amp noise/gain trade-offs while maintaining 9 μs settling for sub-ms loop updates. | Use Scenario: Dynamically tuning cutoff frequency of a second-order active low-pass filter in medical signal acquisition to adapt to varying ECG lead configurations. IC Role / Device Role / Timing Role: Sets RC time constant in Sallen-Key topology by replacing fixed resistor in feedback path; updated in real time during patient setup. Use Value: Enables 256-step resolution for precise corner frequency control; 0.004% THD prevents harmonic contamination of low-amplitude bio-signals. |
| Line Impedance Matching | Programmable Voltage-to-Current Conversion |
Use Scenario: Compensating for PCB trace length variations in high-speed digital backplanes by adjusting termination resistance to match characteristic impedance (e.g., 50 Ω or 75 Ω). IC Role / Device Role / Timing Role: Functions as adjustable series termination resistor between driver and receiver; configured once at system boot. Use Value: 50 kΩ nominal resistance allows parallel combinations to reach target values (e.g., 50 kΩ || 51.1 Ω ≈ 50.9 Ω); 700 ppm/°C tempco ensures impedance stability across operating temperature range. | Use Scenario: Generating precise, software-adjustable current sources for LED brightness control or sensor biasing in industrial IoT nodes. IC Role / Device Role / Timing Role: Configures gain of transimpedance amplifier or sets reference in Howland current source; updated per sensor calibration profile. Use Value: Ratiometric divider mode provides 15 ppm/°C drift-critical for stable current output over temperature; 6 channels support multi-sensor systems with independent biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5206BRU50 | TSSOP-24 package; identical electrical specs, 0.65 mm pitch vs SOIC's 1.27 mm | Better suited for space-constrained PCBs; same thermal resistance (θJA = 82.76°C/W) | Select AD5206BRU50 when board area is limited and reflow profile supports fine-pitch components. |
| MAX5487ETE+ | 6-channel, 256-tap, 50 kΩ; I²C interface, no dual-supply support, 10 ppm/°C divider tempco | Requires I²C host; lacks ±2.7 V operation; superior tempco but higher cost and lower THD margin (0.01%) | Choose MAX5487ETE+ only if I²C is preferred and single-supply operation suffices; verify layout compatibility with exposed-pad TQFN. |
Compared with AD5206BRZ50, AD5206BRU50 offers identical functionality in a smaller footprint, while MAX5487ETE+ trades SPI for I²C and improves tempco at the expense of dual-supply flexibility and distortion performance-making AD5206BRZ50 optimal for mixed-voltage, low-THD, and legacy SPI-based designs.
Availability
AD5206BRZ50 is available at Aetrix Electronics and suitable for instrumentation gain control, programmable filter tuning, line impedance matching, and programmable voltage-to-current conversion requiring stable component supply and long-term obsolescence management.
Supply support for AD5206BRZ50 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 precision instrumentation, industrial automation, and communications markets since 1965.
The AD5206 is part of Analog Devices' precision digital potentiometer product line, designed specifically for replacing mechanical trimmers in automated calibration, sensor signal conditioning, and adaptive analog signal path control.
FAQ
What is the terminal resistance tolerance and temperature coefficient of the AD5206BRZ50?
The AD5206BRZ50 has a nominal terminal resistance of 50 kΩ with a tolerance of ±30% at 25°C and a temperature coefficient of 700 ppm/°C for absolute resistance (RAB). In potentiometer divider mode, the voltage output exhibits a much lower 15 ppm/°C drift due to ratiometric operation-critical for stable reference scaling. These values are measured per Analog Devices' Rev. G datasheet Table 1 under DC CHARACTERISTICS.
Does the AD5206BRZ50 support dual-supply operation, and what are the voltage limits?
Yes, the AD5206BRZ50 supports dual-supply operation with VDD = +2.7 V and VSS = −2.7 V (±2.7 V), provided the sum |VDD| + |VSS| does not exceed 5.5 V. It also operates from a single +2.7 V to +5.5 V supply. Absolute maximum ratings specify VDD to GND ≤ +7 V and VSS to GND ≥ −7 V, but functional operation is guaranteed only within the specified supply ranges per Table 2 of the AD5206BRZ50 datasheet.
How many bits does the AD5206BRZ50 use for wiper position control, and is it monotonic?
The AD5206BRZ50 uses an 8-bit data word (256 positions) for wiper position control per channel, with guaranteed monotonicity across all codes. Its resistor differential nonlinearity (R-DNL) is specified at ±0.25 LSB, ensuring no code-to-code step reversals-essential for closed-loop control stability. This is confirmed in Table 1 of the AD5206BRZ50 datasheet under "Resistor Differential NL" and "DC CHARACTERISTICS RHEOSTAT MODE."
Can the AD5206BRZ50 be daisy-chained, and what interface protocol does it use?
No, the AD5206BRZ50 cannot be daisy-chained because it lacks an SDO (serial data out) pin-unlike the AD5204, which includes SDO for cascading. The AD5206BRZ50 uses a 3-wire SPI-compatible interface (CS, CLK, SDI) with 11-bit serial words (3 address + 8 data bits) and requires individual CS lines for multi-device configurations. This is explicitly stated in the Functional Block Diagrams and Pin Configurations sections of the AD5206BRZ50 datasheet.
What is the wiper settling time of the AD5206BRZ50 at its rated 50 kΩ resistance?
The wiper settling time of the AD5206BRZ50 is 9 μs to within ±1 LSB when configured with 50 kΩ end-to-end resistance, as specified in Table 1 under "VW Settling Time" for RAB = 50 kΩ. This value assumes VA = 5 V, VB = 0 V, and operation at VDD = 5 V. It directly determines the maximum update rate achievable in dynamic applications like adaptive filtering or real-time gain control.
AD5206BRZ50 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:
- 6
- Number of Taps:
- 256
- Resistance (Ohms):
- 50k
- Interface:
- SPI
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V, ±2.3V ~ 2.7V
- Features:
- Selectable Address
- Tolerance:
- ±30%
- Temperature Coefficient (Typ):
- 700ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 24-SOIC
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 50
AD5206BRZ50 FAQ
1.How can I place an order for AD5206BRZ50 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5206BRZ50 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 AD5206BRZ50 reliable?
The price and inventory of AD5206BRZ50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5206BRZ50 is usually 5 days.
3.What payment methods are accepted for AD5206BRZ50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5206BRZ50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5206BRZ50?
AD5206BRZ50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5206BRZ50 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 AD5206BRZ50?
For technical support, including AD5206BRZ50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5206BRZ50 requirements.
6.How does Aetrix verify that AD5206BRZ50 is sourced from the original manufacturer or authorized distributors?
All AD5206BRZ50 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 AD5206BRZ50 meets industry standards.
7.What is the process for return or replacement of AD5206BRZ50?
All AD5206BRZ50 units undergo pre-shipment inspection (PSI). If there is an issue with AD5206BRZ50, 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 AD5206BRZ50 part is unused and in its original packaging.
Return procedure for AD5206BRZ50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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