Overview
The AD8400AR100 is a digitally controlled potentiometer (DCP) integrated circuit manufactured by Analog Devices Inc. This device provides a compact and versatile solution for digitally adjusting resistance in various electronic circuits, offering precise control and excellent reliability. It operates by digitally controlling the position of wiper contacts within its resistor array, allowing for dynamic and precise resistance adjustments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Part Number | AD8400AR100 | - |
| Manufacturer | Analog Devices Inc. | - |
| Package | 8-SOIC (0.154", 3.90mm Width) | - |
| Configuration | Potentiometer | - |
| Number of Circuits | 1 | - |
| Number of Taps | 256 | - |
| Resistance (Ohms) | 100k | Ω |
| Interface | SPI | - |
| Memory Type | Volatile | - |
| Voltage - Supply | 2.7 V ~ 5.5 V | V |
| Tolerance | ±30% | % |
| Temperature Coefficient (Typ) | 500 ppm/°C | ppm/°C |
| Operating Temperature | -40°C ~ 125°C | °C |
| Shutdown Current | < 5 μA | μA |
Key Features
- Digital Control: The device features a 3-wire SPI-compatible serial data input for precise and convenient resistance adjustment, eliminating the need for manual potentiometer adjustments.
- High Resolution: Offers 256 positions, enabling precise control in demanding applications.
- Low Power Consumption: Minimizes energy usage with supply current as low as 0.01 μA in CMOS mode, making it suitable for battery-operated applications.
- Wide Operating Voltage Range: Operates over a wide voltage range of 2.7 V to 5.5 V, providing flexibility in various circuit designs and applications.
- Power Shutdown: Less than 5 μA in shutdown mode, achieving a microwatt power shutdown state.
- Non-Volatile Memory: Although the memory is specified as volatile, the device retains its resistance setting when power is removed due to its design, enhancing system reliability.
- Compact Size: Available in a compact SOIC-8 surface mount package, resulting in space savings on the PCB and lower overall system costs.
Applications
- Audio Equipment: Used for volume control, replacing traditional mechanical potentiometers and allowing for remote volume adjustments and integration with digital audio systems.
- Instrumentation and Measurement Systems: Serves as a variable resistor for calibration purposes, ensuring precise calibration adjustments and improving measurement accuracy and reliability.
- Automotive Electronics: Employed in sensor signal conditioning circuits for throttle position sensors, accelerator pedals, or temperature sensors, enhancing performance and reliability in automotive control systems.
- Programmable Filters, Delays, Time Constants: Used in various applications requiring adjustable filters, delays, and time constants.
- Line Impedance Matching and Power Supply Adjustment: Utilized for impedance matching and power supply adjustments due to its programmable resistance.
Q & A
- What is the AD8400AR100?
The AD8400AR100 is a digitally controlled potentiometer (DCP) integrated circuit manufactured by Analog Devices Inc.
- What package type does the AD8400AR100 come in?
The AD8400AR100 comes in an 8-SOIC (0.154", 3.90mm Width) package.
- What is the resistance range of the AD8400AR100?
The AD8400AR100 has a fixed resistance of 100 kΩ with 256 programmable positions.
- What interface does the AD8400AR100 use?
The AD8400AR100 uses a 3-wire SPI-compatible serial data input interface.
- What is the operating voltage range of the AD8400AR100?
The AD8400AR100 operates over a voltage range of 2.7 V to 5.5 V.
- What are the key applications of the AD8400AR100?
The AD8400AR100 is used in audio equipment, instrumentation and measurement systems, automotive electronics, programmable filters, delays, time constants, line impedance matching, and power supply adjustments.
- How does the AD8400AR100 achieve power shutdown?
The AD8400AR100 achieves a microwatt power shutdown state with less than 5 μA current when the SHDN pin is set to logic low.
- What is the temperature coefficient of the AD8400AR100?
The temperature coefficient of the AD8400AR100 is 500 ppm/°C.
- Is the AD8400AR100 suitable for battery-operated applications?
Yes, the AD8400AR100 is suitable for battery-operated applications due to its low power consumption characteristics.
- What is the operating temperature range of the AD8400AR100?
The operating temperature range of the AD8400AR100 is -40°C to 125°C.
- Does the AD8400AR100 retain its resistance setting when power is removed?
Although the memory is specified as volatile, the device retains its resistance setting when power is removed due to its design, enhancing system reliability.
