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Analog Devices Inc. AD5282BRUZ20
- Part No.:
- AD5282BRUZ20
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD5282BRUZ20.pdf
- Description:
- IC DGT POT 20KOHM 256TAP 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,193
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Product details
Overview
AD5282BRUZ20 from Analog Devices is a dual-channel, 256-position, I²C-compatible digital potentiometer with 20 kΩ fixed terminal resistance, ±5 V or +15 V single-supply operation, and 30 ppm/°C temperature coefficient-used for precision gain/offset adjustment in instrumentation and programmable voltage/current sources.
For engineers reviewing the AD5282BRUZ20 datasheet, AD5282BRUZ20 pinout, AD5282BRUZ20 application, or AD5282BRUZ20 equivalent, this page delivers verified electrical specs, dual-channel wiper control timing, I²C address configuration (AD0/AD1), logic output O1/O2 functionality, and validated alternatives for industrial analog signal conditioning designs.
Technical Context
The AD5282BRUZ20 implements two independent 8-bit RDAC ladders with midscale power-on preset and programmable reset. Each channel supports rheostat (W–B or W–A) and potentiometer (A–W–B) configurations, with guaranteed monotonicity and <±1 LSB INL/DNL over −40°C to +85°C.
Its I²C interface operates up to 400 kHz with standard-mode timing compliance, while dual programmable logic outputs (O1, O2) drive digital loads without external buffers. Terminal voltage range spans VSS to VDD, enabling bipolar AC/DC operation when powered from ±5 V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Dual independent 256-position RDACs-enables simultaneous gain/offset tuning in multi-stage amplifiers or stereo audio paths. |
| Terminal Resistance | 20 kΩ ±1% channel-to-channel matching-ensures consistent scaling across both channels in differential or ratiometric circuits. |
| Supply Range | +4.5 V to +16.5 V single supply or ±4.5 V to ±5.5 V dual supply-supports legacy 5 V, modern 12 V, and bipolar ±5 V signal chains. |
| Tempco | 30 ppm/°C (rheostat), 5 ppm/°C (potentiometer divider)-enables stable voltage division in temperature-varying environments like industrial sensors. |
| I²C Interface | Standard-mode (400 kHz max), 7-bit address with AD0/AD1 pins-allows up to four AD5282BRUZ20 devices on one bus without address conflict. |
| Wiper Settling Time | 5 μs (±1 LSB error band)-supports dynamic reconfiguration in closed-loop calibration or real-time filter tuning. |
| Logic Outputs | O1/O2 programmable via register, 0.4 V low / 4.9 V high-drives LEDs, analog switches, or logic gates directly, reducing BOM count. |
Pinout & Package
AD5282BRUZ20 uses a 16-lead TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch) with exposed pad for thermal performance. Pin functions are validated per Analog Devices Rev. C datasheet Figures 4–5 and Tables 4–5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | O1, A2 | O1: Programmable logic output; A2: Channel 2 resistor terminal A-enables direct load driving or feedback path connection. |
| 2, 15 | A1, W2 | A1: Channel 1 resistor terminal A; W2: Channel 2 wiper-supports independent rheostat or potentiometer use per channel. |
| 3, 14 | W1, B2 | W1: Channel 1 wiper; B2: Channel 2 resistor terminal B-defines adjustable resistance endpoints for each RDAC. |
| 4, 13 | B1, VL | B1: Channel 1 resistor terminal B; VL: Logic supply reference-must match host MCU logic voltage (≤VDD) for reliable I²C communication. |
| 5, 12 | VDD, VSS | VDD: Positive supply (4.5–16.5 V); VSS: Negative supply (0 to −5 V)-supports single- or dual-supply analog biasing. |
| 6, 11 | SHDN, GND | SHDN: Active-low shutdown (wiper → B, A open); GND: System ground reference-enables power-gating and fault-safe default states. |
| 7, 10 | SCL, AD1 | SCL: I²C clock input; AD1: Address bit 1-configures slave address (0x54–0x57) for multi-device bus topology. |
| 8, 9 | SDA, AD0 | SDA: Bidirectional I²C data line; AD0: Address bit 0-supports readback of RDAC register and write-only control sequences. |
Key Features
| Feature | Design Value |
|---|---|
| Midscale power-on preset | Wipers initialize to code 0x80 at power-up-eliminates need for EEPROM or host initialization sequence in fail-safe systems. |
| Programmable reset | Custom wiper position stored in nonvolatile latch-replaces costly external memory for factory-trimmed calibration points. |
| Dual logic outputs (O1/O2) | Configurable as push-pull or open-drain-directly interfaces with LEDs, MOSFET gates, or optocouplers without level-shifting components. |
| Channel-to-channel matching | ±1% RAB tolerance-enables precise differential signal conditioning and matched gain stages in instrumentation amplifiers. |
| Bipolar terminal voltage support | VA/VB/VW operate from VSS to VDD-permits AC-coupled signal attenuation and bidirectional current sourcing/sinking. |
Applications
| Instrumentation Gain Control | Audio Volume Adjustment |
|---|---|
|
Use Scenario: Precision DC gain setting in programmable gain instrumentation amplifiers for sensor front-ends. IC Role / Device Role / Timing Role: Dual-channel AD5282BRUZ20 configures matched feedback resistors in PGA topology, maintaining ratio accuracy across temperature. Use Value: 5 ppm/°C potentiometer-mode tempco ensures <0.1% gain drift over −40°C to +85°C, meeting Class A industrial calibration requirements. |
Use Scenario: Stereo audio volume control in professional audio mixers with independent left/right channel adjustment. IC Role / Device Role / Timing Role: Each channel controls L/R signal attenuation in logarithmic taper emulation via I²C command sequencing. Use Value: 256-step resolution enables smooth, click-free volume transitions; O1/O2 outputs drive LED channel indicators synchronously. |
| Programmable Current Source | Line Impedance Matching |
|
Use Scenario: Adjustable constant-current source for LED biasing or sensor excitation in industrial IoT nodes. IC Role / Device Role / Timing Role: AD5282BRUZ20 wiper sets reference voltage for op-amp current mirror; second channel tunes compliance limit. Use Value: 20 kΩ RAB and 60 Ω wiper resistance enable 0.1–20 mA range with <1% absolute accuracy and <±1 LSB step linearity. |
Use Scenario: Dynamic termination impedance tuning for RS-485 or CAN bus networks under varying cable lengths and EMI conditions. IC Role / Device Role / Timing Role: Rheostat-mode AD5282BRUZ20 adjusts series termination resistance between driver and transmission line. Use Value: 310 kHz bandwidth (20 kΩ) supports >10 Mbps data rates; ±5 V dual-supply operation handles common-mode transients up to ±15 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5282BRUZ50 | Same dual-channel architecture, 50 kΩ terminal resistance, identical pinout and I²C protocol. | Better suited for higher-impedance voltage dividers where 20 kΩ loading is excessive; lower bandwidth (150 kHz). | Select when circuit requires higher RAB for reduced power dissipation or improved noise immunity in high-Z sensor interfaces. |
| AD5202BRUZ10 | Single-channel, 10 kΩ RAB, SPI interface (not I²C), no logic outputs, different pinout (14-lead TSSOP). | Lacks dual-channel synchronization and programmable O1/O2; requires separate SPI master and level-shifting for mixed-voltage systems. | Choose only if I²C bus is unavailable and single-channel adjustment suffices-requires PCB redesign due to pinout and interface mismatch. |
Compared with AD5282BRUZ50 and AD5202BRUZ10, AD5282BRUZ20 offers optimal balance of channel count, 20 kΩ impedance for general-purpose analog tuning, I²C compatibility with address flexibility, and integrated logic outputs-making it the preferred choice for space-constrained dual-channel industrial control designs.
Availability
AD5282BRUZ20 is available at Aetrix Electronics and suitable for instrumentation gain control, audio volume adjustment, programmable current source, and line impedance matching requiring stable component supply across extended temperature ranges.
Supply support for AD5282BRUZ20 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, serving industrial, automotive, communications, and healthcare markets.
The AD5282BRUZ20 belongs to Analog Devices' precision digital potentiometer product line, engineered for replacing mechanical trimmers in automated calibration, programmable analog signal paths, and embedded system-level trimming where reliability and temperature stability are critical.
FAQ
What is the power-on behavior of the AD5282BRUZ20 wiper position?
The AD5282BRUZ20 wiper defaults to midscale (code 0x80) at power-on, regardless of prior register state. This behavior is hardwired and does not require I²C initialization. The AD5282BRUZ20 achieves this via internal power-on reset circuitry synchronized with VL pin voltage ramp, ensuring deterministic startup in safety-critical instrumentation.
Can the AD5282BRUZ20 operate from a single +5 V supply?
Yes, the AD5282BRUZ20 supports single-supply operation from +4.5 V to +16.5 V. With VDD = +5 V and VSS tied to GND, it delivers full 256-step resolution, 30 ppm/°C tempco, and I²C compatibility. The AD5282BRUZ20 maintains specified INL/DNL and settling time under these conditions per Table 1 Electrical Characteristics.
How do the O1 and O2 logic outputs function in the AD5282BRUZ20?
The O1 and O2 outputs in the AD5282BRUZ20 are programmable push-pull drivers controlled by dedicated bits in the instruction register. Each can be set high (≥4.9 V), low (≤0.4 V), or tri-stated. The AD5282BRUZ20 uses them to drive LEDs, enable analog switches, or synchronize status signals-eliminating need for external GPIO expanders in compact designs.
What is the maximum allowable voltage across terminals A, B, and W of the AD5282BRUZ20?
The AD5282BRUZ20 permits terminal voltages from VSS to VDD across A, B, and W-meaning VA, VB, and VW may swing independently within that range. Absolute maximum ratings allow ±20 mA intermittent current per terminal pair. The AD5282BRUZ20 tolerates bipolar operation (e.g., VA = +5 V, VB = −5 V) when powered from ±5 V supplies, as confirmed in the General Description and Absolute Maximum Ratings sections.
Does the AD5282BRUZ20 support readback of the current wiper position?
Yes, the AD5282BRUZ20 supports I²C readback of the RDAC register contents. After sending the 7-bit slave address with R/W = 1, the master receives the current 8-bit wiper code for the selected channel. This capability is documented in the Digital Interface section and verified in Figure 45 (Readback RDAC Value). The AD5282BRUZ20 does not require additional command bytes for read operations.
AD5282BRUZ20 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 2
- Number of Taps:
- 256
- Resistance (Ohms):
- 20k
- Interface:
- I2C
- Memory Type:
- Volatile
- Voltage - Supply:
- 4.5V ~ 16.5V, ±5V
- Features:
- Selectable Address
- Tolerance:
- ±30%
- Temperature Coefficient (Typ):
- 30ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-TSSOP
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 60
AD5282BRUZ20 FAQ
1.How can I place an order for AD5282BRUZ20 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5282BRUZ20 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 AD5282BRUZ20 reliable?
The price and inventory of AD5282BRUZ20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5282BRUZ20 is usually 5 days.
3.What payment methods are accepted for AD5282BRUZ20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5282BRUZ20 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5282BRUZ20?
AD5282BRUZ20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5282BRUZ20 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 AD5282BRUZ20?
For technical support, including AD5282BRUZ20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5282BRUZ20 requirements.
6.How does Aetrix verify that AD5282BRUZ20 is sourced from the original manufacturer or authorized distributors?
All AD5282BRUZ20 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 AD5282BRUZ20 meets industry standards.
7.What is the process for return or replacement of AD5282BRUZ20?
All AD5282BRUZ20 units undergo pre-shipment inspection (PSI). If there is an issue with AD5282BRUZ20, 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 AD5282BRUZ20 part is unused and in its original packaging.
Return procedure for AD5282BRUZ20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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