Part A
AD5220BRZ10
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3519 Stückzahl
- Package
- SOIC-8
- Series
- Datenerfassung
Replacement verdict
Not a drop-in replacement
The AD5220BRZ10 and AD5222BR100 are not drop-in replacements for each other. The AD5220BRZ10 is a single-channel 10 kΩ digital potentiometer with an up/down interface, while the AD5222BR100 is a dual-channel 100 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
AD5222BR100
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9577 Stückzahl
- Package
- SOIC-14
- Series
- Datenerfassung
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 | AD5222BR100 | Why it matters |
|---|---|---|---|
| Number of Positions / Taps | 128 | 128 | Determines the resolution of the digital potentiometer; matching tap count ensures equivalent wiper step granularity. |
| End-to-End Resistance | 10 kΩ | 100 kΩ | Sets the nominal resistance range; a 10x difference directly affects circuit gain, current, and loading, so they are not drop-in substitutes. |
| Number of Potentiometers per Package | 1 | 2 | A dual-channel device can replace two single-channel devices, affecting board space and channel count in the design. |
| Interface Type | Up/Down (3-wire increment/decrement) | Up/Down (3-wire increment/decrement) | Defines the control protocol; identical interface simplifies firmware and pin driving compatibility. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Determines compatibility with the system power rail; matching ranges allow use in the same supply environment. |
| Supply Current | ~0.4 µA (typical) | ~0.4 µA per channel (typical) | Affects power budget; the dual-channel part draws roughly twice the total quiescent current. |
| Wiper Resistance | ~60 Ω (typical) | ~60 Ω (typical) | Adds series error to the set resistance; similar wiper resistance keeps attenuation accuracy comparable. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Defines the environmental envelope; matching ranges ensure both parts suit the same application conditions. |
| Package Type | 8-Lead SOIC | 14-Lead SOIC | Footprint and pin count differ, so the PCB layout cannot be shared without redesign. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5220BRZ10 | AD5222BR100 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Circuits | 1 | 2 |
| Number of Taps | 128 | 128 |
| Resistance(Ohms) | 10k | 100k |
| 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 primary differences between the AD5220BRZ10 and AD5222BR100?
The AD5220BRZ10 is a single-channel, 10 kΩ digital potentiometer with 128 positions and an up/down interface, while the AD5222BR100 is a dual-channel, 100 kΩ digital potentiometer with 64 positions per channel and a 3-wire SPI-compatible interface. They differ in channel count, end-to-end resistance, resolution, and control interface.
Are the AD5220BRZ10 and AD5222BR100 pin-compatible?
No. The AD5220BRZ10 is typically offered in an 8-lead SOIC package, whereas the AD5222BR100 is typically offered in a 14-lead SOIC package. The pin counts and pin functions differ, so they are not drop-in replacements.
Can the AD5220BRZ10 and AD5222BR100 operate from the same supply voltage?
Both devices are specified for single-supply operation from 2.7 V to 5.5 V, so they can share a common supply rail within that range. However, the digital input logic thresholds and interface timing should be verified against the respective datasheets for the chosen supply voltage.
How do the resolution and wiper positions compare between the AD5220BRZ10 and AD5222BR100?
The AD5220BRZ10 provides 128 wiper positions (7-bit resolution) for its single channel. The AD5222BR100 provides 64 wiper positions (6-bit resolution) per channel for each of its two channels. The AD5220BRZ10 therefore offers finer adjustment resolution per channel.
What control interfaces do the AD5220BRZ10 and AD5222BR100 use?
The AD5220BRZ10 uses a simple up/down (increment/decrement) interface with a chip select input. The AD5222BR100 uses a 3-wire SPI-compatible serial interface for independent control of both channels. The interface choice affects microcontroller pin count and firmware complexity.
Are the AD5220BRZ10 and AD5222BR100 suitable for replacing mechanical potentiometers in the same circuit?
Both are digital potentiometers intended to replace mechanical potentiometers, but they are not interchangeable in the same circuit without redesign. The AD5220BRZ10 offers a single 10 kΩ channel with 128 positions, while the AD5222BR100 offers two 100 kΩ channels with 64 positions each. Circuit impedance, resolution, and channel count requirements must be matched to the specific device.
What are the typical end-to-end resistance tolerances for the AD5220BRZ10 and AD5222BR100?
The AD5220BRZ10 is available in a 10 kΩ end-to-end resistance option, and the AD5222BR100 is available in a 100 kΩ end-to-end resistance option. Both devices typically specify a resistance tolerance of ±20% or better, but the exact tolerance should be confirmed from the manufacturer datasheet for the specific grade and temperature range.
Do the AD5220BRZ10 and AD5222BR100 support daisy-chaining or multiple devices on the same bus?
The AD5222BR100, with its SPI-compatible serial interface, can share a serial bus with other SPI devices using separate chip select lines. The AD5220BRZ10 uses an up/down interface and does not support bus sharing in the same manner; multiple AD5220 devices would require individual control lines. Neither device supports true daisy-chain configuration as a standard feature.