Part A
AD5282BRUZ200
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2185 PCS
- Package
- TSSOP-16
- Series
- Acquisition de données - potentiomètres numériques
Replacement verdict
Compatible functional replacement candidate
The AD5282BRUZ20 and AD5282BRUZ200 are functionally compatible digital potentiometers from the same AD5282 family, sharing identical package, interface, and channel configuration. The primary distinction is the end-to-end resistance value, which directly affects the current handling and circuit calibration. Designers must verify that the 200 kΩ variant satisfies the target application's impedance and signal-level requirements before substituting the 20 kΩ version.
End-to-End Resistance
Not compatible
Package Type
High match
Interface Type
High match
Channel Count
High match
Parts at a glance
Part B
AD5282BRUZ20
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4544 PCS
- Package
- TSSOP-16
- Series
- Acquisition de données - potentiomètres numériques
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD5282BRUZ20 | AD5282BRUZ200 | Why it matters |
|---|---|---|---|
| End-to-End Resistance | 20 kΩ | 200 kΩ | Determines the nominal resistance of the digital potentiometer, directly affecting the current through and voltage across the device in a given circuit. |
| Number of Positions | 256 | 256 | Defines the wiper resolution; both parts offer the same 8-bit adjustment granularity. |
| Number of Channels | 2 | 2 | Indicates how many independent potentiometer channels are integrated, affecting board space and channel count in a design. |
| Supply Voltage Range | +4.5 V to +16.5 V (single), ±2.25 V to ±8.25 V (dual) | +4.5 V to +16.5 V (single), ±2.25 V to ±8.25 V (dual) | Defines the allowable operating supply rails; identical ranges mean both parts are interchangeable from a power-supply standpoint. |
| Interface Type | I²C (2-wire) | I²C (2-wire) | Determines the digital communication protocol required by the host controller; matching interfaces simplify drop-in replacement. |
| Package / Mounting | 16-Lead TSSOP | 16-Lead TSSOP | Physical footprint and mounting style must match for PCB layout compatibility. |
| Operating Temperature Range | −40 °C to +85 °C | −40 °C to +85 °C | Ensures the device meets the environmental requirements of the target application. |
| Wiper Resistance | ~60 Ω (typical) | ~60 Ω (typical) | Wiper resistance adds to the programmed resistance and can affect accuracy, especially at low resistance settings. |
| Nominal Resistance Tolerance | ±30 % | ±30 % | Indicates part-to-part variation in end-to-end resistance, which impacts absolute accuracy of the set resistance. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5282BRUZ200 | AD5282BRUZ20 |
|---|---|---|
| Part Status | Active | Active |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Potentiometer |
| Number of Circuits | 2 | 2 |
| Number of Taps | 256 | 256 |
| Resistance(Ohms) | 200k | 20k |
| Interface | I²C | I²C |
| Memory Type | Volatile | Volatile |
| Voltage - Supply | 4.5V ~ 16.5V, ±5V | 4.5V ~ 16.5V, ±5V |
| Features | Selectable Address | Selectable Address |
| Tolerance | ±30% | ±30% |
| Temperature Coefficient(Typ) | 30ppm/°C | 30ppm/°C |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What is the primary difference between the AD5282BRUZ20 and the AD5282BRUZ200?
The primary difference is the end-to-end resistance value of the digital potentiometer. The AD5282BRUZ20 has a 20 kΩ nominal resistance, while the AD5282BRUZ200 has a 200 kΩ nominal resistance. Both are dual-channel, 256-position, I2C-compatible digital potentiometers from Analog Devices in a 16-lead TSSOP package.
Are the AD5282BRUZ20 and AD5282BRUZ200 pin-compatible and package-compatible?
Yes. Both devices are offered in the same 16-lead TSSOP (RU-16) package and share the same pinout. This allows them to be used interchangeably on the same PCB layout, provided the resistance value is appropriate for the target application.
Can the AD5282BRUZ20 and AD5282BRUZ200 be used interchangeably in a design?
They are not directly interchangeable without design validation. Although they share the same package, pinout, and digital interface, the 10× difference in end-to-end resistance (20 kΩ vs. 200 kΩ) affects wiper current, power dissipation, RC time constants, and the loading of the preceding and following circuit stages. The resistance value must be selected based on the specific circuit requirements.
What is the resolution and number of positions for both the AD5282BRUZ20 and AD5282BRUZ200?
Both devices provide 256-position resolution (8-bit) per channel. Each of the two channels has a wiper that can be set to one of 256 discrete tap positions between the A and B terminals.
What digital interface do the AD5282BRUZ20 and AD5282BRUZ200 use?
Both devices use a 2-wire I2C-compatible serial interface. They support standard and fast I2C modes and include an address pin that allows up to two devices to be placed on the same bus.
What are the supply voltage and operating temperature ranges for the AD5282BRUZ20 and AD5282BRUZ200?
Both devices operate from a single 2.7 V to 5.5 V supply (or dual ±2.5 V to ±5.5 V supplies) and are specified over the industrial temperature range of −40°C to +85°C.
How does the 10× resistance difference affect power dissipation in the AD5282BRUZ20 versus the AD5282BRUZ200?
For a given voltage across the potentiometer terminals, the AD5282BRUZ20 (20 kΩ) will dissipate approximately 10× more power than the AD5282BRUZ200 (200 kΩ), since power is inversely proportional to resistance (P = V²/R). The 200 kΩ version is preferable in low-power or high-voltage-across-terminals applications, while the 20 kΩ version provides lower thermal noise and faster settling.
Which version, AD5282BRUZ20 or AD5282BRUZ200, is better for low-power designs?
The AD5282BRUZ200 is generally better for low-power designs because its higher end-to-end resistance (200 kΩ) reduces the current through the potentiometer for a given applied voltage, thereby lowering quiescent power dissipation in the resistor string. However, the digital supply current and I2C interface power are essentially the same for both devices.
Do the AD5282BRUZ20 and AD5282BRUZ200 have the same wiper resistance and bandwidth characteristics?
No. Wiper resistance is typically similar (on the order of tens of ohms) for both, but the −3 dB bandwidth is inversely related to resistance. The AD5282BRUZ20 (20 kΩ) provides a wider signal bandwidth than the AD5282BRUZ200 (200 kΩ) because the parasitic capacitance at the wiper forms a lower RC time constant with the lower resistance.