Part A
AD5220BRZ10
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 3519 PCS
- Package
- SOIC-8
- Series
- 데이터 수집 - 디지털 전위기
Replacement verdict
Not a drop-in replacement
The AD5220BRZ10 and AD5222BRZ50 are not functionally interchangeable. Although both are single-channel digital potentiometers from Analog Devices, they differ in end-to-end resistance, interface protocol, package footprint, and wiper configuration, requiring circuit redesign and firmware adaptation before substitution can be considered.
Different end-to-end resistance
Different interface protocol
Different package footprint
Different wiper configuration
Parts at a glance
Part B
AD5222BRZ50
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 3434 PCS
- Package
- SOIC-14
- Series
- 데이터 수집 - 디지털 전위기
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 | AD5222BRZ50 | Why it matters |
|---|---|---|---|
| Number of Positions | 128 | 128 | Determines the resolution of the digital potentiometer; both offer 128 taps, so resolution is equivalent. |
| End-to-End Resistance | 10 kΩ | 50 kΩ | The nominal resistance directly affects the current and voltage range in the application circuit, so a different value changes circuit behavior. |
| Number of Potentiometers | 1 | 2 | Indicates how many independent variable resistors are integrated; the AD5222 provides two channels, enabling dual-channel designs. |
| Interface Type | Up/Down (3-wire) | Up/Down (3-wire) | Defines the control protocol required by the host; both use a simple up/down interface, so control logic is compatible. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Determines compatibility with the system power rail; identical ranges allow use in the same low-voltage designs. |
| Supply Current | 10 µA typ | 20 µA typ | Affects power budget in portable or low-power systems; the dual-channel device draws more current. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Defines the environmental conditions for reliable operation; identical ranges mean both suit industrial temperature environments. |
| Package / Mounting Type | 8-Lead SOIC (Surface Mount) | 14-Lead SOIC (Surface Mount) | Footprint and pin count affect PCB layout and assembly; the AD5222 requires a larger package due to its dual channel. |
| Wiper Resistance | 60 Ω typ | 60 Ω typ | Adds to the set resistance and affects accuracy; identical wiper resistance means similar error contribution. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5220BRZ10 | AD5222BRZ50 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Taper | Linear | Linear |
| Configuration | Potentiometer | Potentiometer |
| Number of Circuits | 1 | 2 |
| Number of Taps | 128 | 128 |
| Resistance(Ohms) | 10k | 50k |
| Interface | Up/Down (U/D, CS) | Up/Down (U/D, CS) |
| Memory Type | Volatile | Volatile |
| Voltage - Supply | 2.7V ~ 5.5V | 2.7V ~ 5.5V, ±2.3V ~ 2.7V |
| Tolerance | ±30% | ±30% |
| Temperature Coefficient(Typ) | 800ppm/°C | -35ppm/°C |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD5220BRZ10 and AD5222BRZ50 digital potentiometers?
The AD5220BRZ10 is a single-channel, 10 kΩ, 128-position digital potentiometer with an up/down interface, while the AD5222BRZ50 is a dual-channel, 50 kΩ, 128-position digital potentiometer with a similar up/down interface. The AD5220BRZ10 provides one variable resistor, whereas the AD5222BRZ50 provides two independent channels in the same package.
Are the AD5220BRZ10 and AD5222BRZ50 pin-compatible?
No. The AD5220BRZ10 is typically offered in an 8-lead SOIC package, while the AD5222BRZ50 is typically offered in a 14-lead SOIC package. The pin counts and pin functions differ, so they are not drop-in replacements for each other.
What is the end-to-end resistance of each device?
The AD5220BRZ10 has a nominal end-to-end resistance of 10 kΩ. The AD5222BRZ50 has a nominal end-to-end resistance of 50 kΩ. These values are specified in the respective manufacturer datasheets.
How many positions do the AD5220BRZ10 and AD5222BRZ50 provide?
Both devices provide 128 positions (7-bit resolution) for wiper adjustment. The AD5220BRZ10 offers 128 positions on a single channel, while the AD5222BRZ50 offers 128 positions on each of its two channels.
What control interface do the AD5220BRZ10 and AD5222BRZ50 use?
Both devices use a simple up/down (increment/decrement) digital interface with a chip select or similar control pin. They do not require a serial bus such as I²C or SPI. The exact pin names and timing requirements should be verified in the respective datasheets.
Can the AD5220BRZ10 and AD5222BRZ50 operate from the same supply voltage?
Both devices are specified for single-supply operation, typically in the 2.7 V to 5.5 V range, and also support dual-supply operation within specified limits. However, the exact supply voltage ranges and absolute maximum ratings may differ slightly between the two models, so the datasheets must be consulted for each part.
Which device is more suitable for applications requiring two independent variable resistors?
The AD5222BRZ50 is the appropriate choice because it integrates two independent 50 kΩ, 128-position digital potentiometers in one package. The AD5220BRZ10 provides only a single 10 kΩ channel, so it cannot replace a dual-channel requirement without using two separate devices.
Are the AD5220BRZ10 and AD5222BRZ50 interchangeable in existing designs?
No. They differ in channel count, end-to-end resistance, package size, and pinout. Any substitution requires a full review of the schematic, PCB layout, supply voltages, and digital interface timing against the manufacturer datasheets for both parts.