AD5201BRMZ10-REEL7

Overview

The AD5201BRMZ10-REEL7 is a single-channel, 33-position digital potentiometer manufactured by Analog Devices. It features a nominal end-to-end resistance of 10 kΩ with a linear taper and a temperature coefficient of 500 ppm/°C. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V or dual supplies up to ±2.7 V, consuming a typical positive supply current of 15 µA. Control is achieved via a 3-wire SPI-compatible serial interface using six data bits. The unit is housed in a compact MSOP-10 surface-mount package and is rated for operation within an extended industrial temperature range of –40°C to +85°C.

Feature Summary

• 33-Position Resolution: Utilizes a 6-bit serial input to control 33 distinct wiper positions.
• SPI-Compatible Interface: Controlled via Clock (CLK), Chip Select (CS), and Serial Data Input (SDI) pins.
• Shutdown Mode: Active-low SHDN pin forces Terminal A open and shorts Wiper to B, achieving microwatt power consumption while retaining latch settings.
• Power-On Preset: Internal circuitry automatically sets the wiper to midscale (Code 10H) upon power-up.

Applications

• Mechanical Potentiometer Replacement
• Instrumentation Gain and Offset Adjustment
• Programmable Voltage-to-Current Conversion
• Programmable Filters, Delays, and Time Constants
• Line Impedance Matching

Procurement Notes

Verify the specific suffix '10' confirms the 10 kΩ nominal resistance value, as the AD5201 series also offers 50 kΩ variants. Confirm the 'BRMZ' designation corresponds to the MSOP-10 package and industrial temperature grade. Ensure the 'REEL7' suffix matches the required tape-and-reel quantity for manufacturing integration. Cross-reference the datasheet revision to ensure compatibility with design specifications.

Selection Notes

Select this component when a low-resolution, cost-effective digital adjustment is required for circuits operating between 2.7 V and 5.5 V. The 33-position resolution is suitable for coarse adjustments rather than high-precision applications. Consider the 10 kΩ nominal resistance against the 50 Ω wiper resistance and ±30% tolerance limits. Verify that the 3-wire SPI interface aligns with the host microcontroller's available serial ports.

Part Context

This part belongs to the AD5200/AD5201 family of programmable resistor devices. While the AD5200 provides 256 positions (8-bit), the AD5201 offers 33 positions (6-bit). Both share identical electrical characteristics regarding bandwidth, distortion, and supply requirements, differing primarily in resolution and the number of bits required for serial data transmission.

Replacement Considerations

The AD5200BRMZ10 serves as a higher-resolution alternative within the same package and interface standard. Other ADI digital potentiometers may require different interface protocols such as I2C or parallel inputs. Verify pinout compatibility if substituting with non-ADI equivalents, as terminal assignments for CS, CLK, and SDI may vary.

FAQ

How does the shutdown mode affect the resistance state?

When the SHDN pin is driven low, Terminal A becomes an open circuit, and the Wiper (W) is shorted to Terminal B. This results in a leakage-current-only state while preserving the last programmed resistance value in the internal latch.

What is the behavior of the wiper at zero-scale code?

At code 00H, the wiper connects directly to Terminal B. Due to the internal switch structure, a finite wiper resistance (RW) of approximately 50 Ω remains present even in this zero-scale condition.

Can the AD5201 operate with bipolar supplies?

Yes, the device supports dual supplies ranging from ±2.3 V to ±2.7 V. This configuration allows for AC signal processing where the resistor terminals can handle voltages relative to a negative rail.