Part A
AD5220BRZ10
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3519 PCS
- Package
- SOIC-8
- Series
- Data Acquisition - Digital Potentiometers
Replacement verdict
Not a drop-in replacement
The AD5220BRZ10 and AD5222BR50 are not functionally interchangeable. The AD5220BRZ10 is a single-channel 10 kΩ digital potentiometer with an up/down interface, while the AD5222BR50 is a dual-channel 50 kΩ digital potentiometer with a 3-wire SPI-compatible interface. They differ in channel count, end-to-end resistance, control interface, and package pinout, so direct substitution is not possible without circuit redesign.
Different channel count
Different end-to-end resistance
Different control interface
Different pinout
Parts at a glance
Part B
AD5222BR50
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2236 PCS
- Package
- SOIC-14
- Series
- Data Acquisition - Digital Potentiometers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD5220BRZ10 | AD5222BR50 | Why it matters |
|---|---|---|---|
| Number of Positions / Taps | 128 | 256 | Determines the resolution of resistance adjustment; a higher tap count allows finer wiper positioning. |
| End-to-End Resistance | 10 kΩ | 50 kΩ | Sets the nominal resistance range of the potentiometer, directly affecting the circuit's impedance and current levels. |
| Number of Channels | 1 | 2 | Indicates how many independent potentiometers are integrated in the package, affecting board space and channel count. |
| Interface Type | Up/Down (3-wire) | Up/Down (3-wire) | Defines the digital control protocol required to adjust the wiper position. |
| Wiper Resistance | 60 Ω typ | 60 Ω typ | Adds a fixed series resistance at the wiper, affecting accuracy especially at low resistance settings. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Determines compatibility with the system's logic and analog supply rails. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Specifies the environmental conditions under which the device is guaranteed to operate reliably. |
| Package / Mounting Type | 8-Lead SOIC (Surface Mount) | 14-Lead SOIC (Surface Mount) | Affects PCB footprint, assembly, and mechanical compatibility for drop-in substitution. |
| Nonvolatile Memory | No | No | Determines whether the wiper setting is retained after power cycling without reinitialization. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5220BRZ10 | AD5222BR50 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Circuits | 1 | 2 |
| Number of Taps | 128 | 128 |
| Resistance(Ohms) | 10k | 50k |
| Memory Type | Volatile | Volatile |
| Voltage - Supply | 2.7V ~ 5.5V | 2.7V ~ 5.5V, ±2.3V ~ 2.7V |
| Temperature Coefficient(Typ) | 800ppm/°C | -35ppm/°C |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Taper | Linear | - |
| Configuration | Potentiometer | - |
| Interface | Up/Down (U/D, CS) | - |
| Tolerance | ±30% | - |
Frequently asked questions
What are the key differences between the AD5220BRZ10 and AD5222BR50?
The AD5220BRZ10 is a single-channel, 10 kΩ digital potentiometer with 128 positions and an up/down interface, while the AD5222BR50 is a dual-channel, 50 kΩ digital potentiometer with 128 positions and an up/down interface. The AD5220 provides one variable resistor, whereas the AD5222 provides two independent variable resistors in the same package.
Are the AD5220BRZ10 and AD5222BR50 pin-compatible?
No. The AD5220BRZ10 is typically offered in an 8-lead SOIC package, while the AD5222BR50 is typically offered in a 14-lead SOIC package. They have different pin counts and pin functions, so they are not drop-in replacements.
What is the end-to-end resistance of each device?
The AD5220BRZ10 has a nominal end-to-end resistance of 10 kΩ. The AD5222BR50 has a nominal end-to-end resistance of 50 kΩ. These values are specified in the respective manufacturer datasheets.
How many resistor positions do these digital potentiometers provide?
Both the AD5220BRZ10 and AD5222BR50 provide 128 positions (7-bit resolution) for each internal resistor string, as specified in their datasheets.
What control interface do the AD5220BRZ10 and AD5222BR50 use?
Both devices use a simple up/down (increment/decrement) digital interface with chip select and clock inputs. They do not use I²C or SPI. The AD5222 includes two independent up/down control channels for its two potentiometers.
Can the AD5220BRZ10 be used to replace the AD5222BR50 in a dual-channel application?
No. The AD5220BRZ10 is a single-channel device, while the AD5222BR50 is a dual-channel device. Replacing a dual-channel part with a single-channel part would require two AD5220 devices and additional board space, and the pinout and control logic would not match directly.
What are the typical operating voltage ranges for these devices?
Both the AD5220BRZ10 and AD5222BR50 are specified for single-supply operation from +2.7 V to +5.5 V, per the manufacturer datasheets. They are not specified for dual-supply operation.
Do the AD5220BRZ10 and AD5222BR50 have nonvolatile memory?
No. Both devices are volatile digital potentiometers. The wiper position is lost when power is removed and must be reprogrammed after power-up. They do not contain EEPROM or other nonvolatile storage.