Part A
AD5175BRMZ-10
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5022 Stückzahl
- Package
- MSOP-10
- Series
- Datenerfassung
Replacement verdict
Not a drop-in replacement
The AD5175BRMZ-10 and AD5172BRM100 are not drop-in replacements for each other. Although both are single-channel digital potentiometers from Analog Devices in the same MSOP-10 package, they differ fundamentally in digital interface, rheostat end-to-end resistance, and wiper resolution, requiring hardware and firmware redesign before any substitution can be considered.
Different digital interface
Different end-to-end resistance
Different wiper resolution
Firmware rewrite required
Parts at a glance
Part B
AD5172BRM100
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 151 Stückzahl
- Package
- MSOP-10
- 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 | AD5175BRMZ-10 | AD5172BRM100 | Why it matters |
|---|---|---|---|
| Number of Positions | 1024 | 256 | Determines the resolution of resistance adjustment; a 1024-position device offers finer wiper granularity than a 256-position device. |
| Nominal Resistance | 10 kΩ | 100 kΩ | Sets the end-to-end resistance range, directly affecting the current and voltage levels the potentiometer can handle in a given circuit. |
| Interface Type | I²C | Up/Down (3-wire) | Determines how the host controller communicates with the device; I²C and up/down interfaces are not pin- or protocol-compatible. |
| Wiper Memory Retention | 50-TP OTP | 50-TP OTP | Indicates whether the wiper setting is retained after power cycling; both use one-time-programmable memory for this function. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the operating voltage window; matching ranges allow use in similar low-voltage systems. |
| Package | 10-Lead MSOP | 10-Lead MSOP | Physical footprint and pinout must match for a drop-in replacement on an existing PCB. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Ensures the device meets the thermal requirements of the target application environment. |
| Resistance Tolerance | ±15% | ±30% | Affects absolute accuracy of the end-to-end resistance, which impacts calibration and circuit precision. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5175BRMZ-10 | AD5172BRM100 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Taper | Linear | Linear |
| Configuration | Rheostat | Potentiometer |
| Number of Circuits | 1 | 2 |
| Number of Taps | 1024 | 256 |
| Resistance(Ohms) | 10k | 100k |
| Interface | I²C | I²C |
| Memory Type | Non-Volatile | OTP |
| Voltage - Supply | 2.7V ~ 5.5V, ±2.5V ~ 2.75V | 2.7V ~ 5.5V |
| Tolerance | ±15% | ±20% |
| Temperature Coefficient(Typ) | 35ppm/°C | 35ppm/°C |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Features | Selectable Address | - |
Frequently asked questions
What are the key differences between the AD5175BRMZ-10 and the AD5172BRM100?
The AD5175BRMZ-10 is a single-channel, 1024-position digital potentiometer with a 10 kΩ end-to-end resistance, nonvolatile memory, and an I2C interface. The AD5172BRM100 is a dual-channel, 256-position digital potentiometer with a 100 kΩ end-to-end resistance and a 2-wire up/down interface. They differ in channel count, resolution, nominal resistance, and digital interface.
Are the AD5175BRMZ-10 and AD5172BRM100 pin-compatible?
No. The AD5175BRMZ-10 is a single-channel device in a 10-lead MSOP package, while the AD5172BRM100 is a dual-channel device in a 10-lead MSOP package. Their pin functions and internal architectures differ, so they are not direct pin-for-pin replacements.
What is the nominal end-to-end resistance of each part?
The AD5175BRMZ-10 has a 10 kΩ nominal end-to-end resistance. The AD5172BRM100 has a 100 kΩ nominal end-to-end resistance.
How many wiper positions does each digital potentiometer provide?
The AD5175BRMZ-10 provides 1024 wiper positions (10-bit resolution). The AD5172BRM100 provides 256 wiper positions (8-bit resolution).
Do these devices retain their wiper settings after power cycling?
The AD5175BRMZ-10 includes nonvolatile memory (EEPROM) that retains the wiper setting after power is removed. The AD5172BRM100 does not include nonvolatile memory; its wiper setting is lost when power is removed unless externally stored.
What digital interfaces do the AD5175BRMZ-10 and AD5172BRM100 use?
The AD5175BRMZ-10 uses an I2C-compatible serial interface. The AD5172BRM100 uses a 2-wire up/down (increment/decrement) interface.
Can the AD5175BRMZ-10 and AD5172BRM100 operate from the same supply voltage?
Both devices operate from a single 2.7 V to 5.5 V supply, so they can share a common logic and analog supply rail within that range, provided the rest of the circuit requirements are met.
Which part is better for applications requiring two independent resistance channels?
The AD5172BRM100 is the appropriate choice because it integrates two independent 256-position, 100 kΩ digital potentiometers in one package. The AD5175BRMZ-10 provides only a single channel.