ADG711BRZ-REEL7

The ADG711BRZ-REEL7 is a high-performance, quad single-pole, single-throw (SPST) analog switch manufactured by Analog Devices, Inc. It is a monolithic CMOS device designed for low-voltage, low-power applications, offering excellent switching performance, low on-resistance, and high reliability. This component is widely used in applications such as signal routing, multiplexing, and switching in communication systems, industrial automation, and consumer electronics. Below is a detailed overview of the ADG711BRZ-REEL7, covering its features, specifications, applications, and operational principles.

Overview and Key Features

The ADG711BRZ-REEL7 is part of the ADG711 series, which contains four independently selectable SPST switches. These switches are designed using an advanced submicron CMOS process, enabling low power dissipation, high switching speeds, and low on-resistance. The device is optimized for applications requiring minimal power consumption and high signal integrity, making it suitable for battery-powered devices and portable systems. Each switch can handle both analog and digital signals, offering flexibility in various circuit designs. The "BRZ-REEL7" suffix indicates the device is packaged in a 16-lead SOIC (Small Outline Integrated Circuit) and supplied in a 7-inch tape-and-reel format for automated assembly.

Technical Specifications

The following are the key technical specifications of the ADG711BRZ-REEL7, based on its datasheet and typical performance characteristics:

- Switch Configuration: Quad SPST (Single-Pole, Single-Throw)
- Supply Voltage Range:
- Single Supply: 1.8 V to 5.5 V
- Dual Supply: Not applicable (single-supply operation only)
- On-Resistance (R_ON):
- Typical: 2.5 Ω at 5 V supply
- Maximum: 4 Ω at 5 V supply, 25°C
- On-Resistance Flatness: 0.5 Ω (typical), ensuring minimal signal distortion
- Leakage Currents:
- Switch On Leakage: ±0.01 nA (typical), ±0.25 nA (maximum) at 25°C
- Switch Off Leakage: ±0.01 nA (typical), ±0.25 nA (maximum) at 25°C
- Switching Times:
- Turn-On Time (t_ON): 11 ns (typical) at 5 V
- Turn-Off Time (t_OFF): 6 ns (typical) at 5 V
- Charge Injection: 3 pC (typical), minimizing transient effects during switching
- Bandwidth: 200 MHz (typical), suitable for high-frequency signals
- Off Isolation: -60 dB at 10 MHz, ensuring minimal signal crosstalk
- Crosstalk: -90 dB at 10 MHz, providing excellent channel-to-channel isolation
- Power Consumption:
- Supply Current: 0.001 µA (typical), 1 µA (maximum) in standby
- Extremely low power, ideal for battery-operated devices
- Operating Temperature Range: -40°C to +85°C (industrial range)
- Package: 16-lead SOIC (MS-012-AC), 16 pins
- ESD Protection: Up to 2 kV (Human Body Model)
- RoHS Compliance: Yes, lead-free and RoHS-compliant

These specifications highlight the ADG711BRZ-REEL7’s ability to provide low on-resistance, fast switching, and minimal power consumption, making it a versatile choice for precision signal routing.

Functional Description

The ADG711BRZ-REEL7 consists of four independent SPST switches, each controlled by a digital input. When the control input is logic high, the switch is closed (on), connecting the source (S) to the drain (D) terminal. When the control input is logic low, the switch is open (off), isolating the source from the drain. The switches are designed to handle both analog and digital signals within the supply voltage range (1.8 V to 5.5 V). The low on-resistance ensures minimal signal attenuation, while the high bandwidth and low charge injection make the device suitable for high-speed and precision applications.

The device uses a CMOS process that optimizes power efficiency and switching performance. The low leakage currents (in the picoampere range) minimize signal loss and ensure high accuracy in analog applications. The switches are bidirectional, allowing signals to flow in either direction between the source and drain, which enhances design flexibility.

Applications

The ADG711BRZ-REEL7 is used in a wide range of applications due to its low power, low on-resistance, and high switching speed. Some key applications include:

- Signal Routing: Used in audio and video signal switching to route signals between different inputs and outputs with minimal distortion.
- Multiplexing: Employed in data acquisition systems for multiplexing multiple analog inputs to a single analog-to-digital converter (ADC).
- Battery-Powered Devices: Ideal for portable devices such as smartphones, tablets, and wearables due to its low power consumption.
- Communication Systems: Used in telecommunications and networking equipment for signal switching in broadband and wireless infrastructure.
- Industrial Automation: Applied in control systems and sensor interfaces for reliable signal switching in harsh environments.
- Medical Devices: Suitable for medical instrumentation requiring precision signal routing, such as ECG or ultrasound systems.
- Test and Measurement Equipment: Used in automated test equipment (ATE) for switching test signals with high accuracy and speed.

The device’s versatility makes it a go-to choice for engineers designing systems that require efficient and reliable analog switching.

Operational Characteristics

The ADG711BRZ-REEL7 operates on a single supply voltage ranging from 1.8 V to 5.5 V, making it compatible with low-voltage systems, including those powered by a single lithium-ion battery or 3.3 V logic. The low on-resistance (typically 2.5 Ω) ensures minimal signal loss, and the flat on-resistance profile over the signal range reduces distortion, which is critical for audio and precision analog applications.

The switching times (11 ns turn-on, 6 ns turn-off) enable fast signal transitions, making the device suitable for high-speed applications such as video switching or data acquisition. The low charge injection (3 pC typical) minimizes voltage transients when the switch changes state, which is essential for maintaining signal integrity in sensitive applications like sample-and-hold circuits.

The device’s high off-isolation (-60 dB at 10 MHz) and low crosstalk (-90 dB at 10 MHz) ensure that signals on different channels do not interfere with each other, making it ideal for multi-channel systems. The 200 MHz bandwidth supports high-frequency signals, enabling use in RF and video applications.

Design Considerations

When designing with the ADG711BRZ-REEL7, engineers should consider the following:

- Power Supply: Ensure the supply voltage remains within 1.8 V to 5.5 V. A clean, stable power supply is recommended to avoid noise affecting signal quality.
- Signal Range: The analog signal voltage must stay within the supply rails (0 V to V_DD) to prevent damage to the switch or signal clipping.
- Control Logic: The digital control inputs are compatible with standard CMOS and TTL logic levels, simplifying interfacing with microcontrollers or digital signal processors.
- Layout: Minimize parasitic capacitance and inductance in the PCB layout to maintain high-frequency performance. Keep signal paths short and use proper grounding techniques.
- Thermal Management: Although the device has low power consumption, ensure adequate thermal dissipation in high-density designs or high-temperature environments.
- ESD Protection: The device includes 2 kV ESD protection, but additional external protection may be required in environments with high electrostatic discharge risks.

Packaging and Availability

The ADG711BRZ-REEL7 is housed in a 16-lead SOIC package, which is compact and suitable for surface-mount assembly. The “REEL7” designation indicates that the device is supplied in a 7-inch tape-and-reel format, typically containing 1,000 units, which is ideal for high-volume manufacturing. The device is RoHS-compliant, ensuring it meets environmental standards for lead-free components.

Comparison with Similar Devices

The ADG711BRZ-REEL7 can be compared to other analog switches in the Analog Devices portfolio, such as the ADG712 and ADG719. The ADG712 is similar but features normally closed (NC) switches, while the ADG711 has normally open (NO) switches. The ADG719, on the other hand, is a single SPDT (single-pole, double-throw) switch, offering a different configuration for applications requiring a 2:1 multiplexer. Compared to competitors like the Texas Instruments TS3A4741, the ADG711BRZ-REEL7 offers lower on-resistance and higher bandwidth, making it a better choice for high-frequency and low-distortion applications.

Reliability and Quality

Analog Devices is known for its high-quality semiconductor products, and the ADG711BRZ-REEL7 is no exception. The device is designed to meet rigorous quality and reliability standards, ensuring consistent performance in demanding applications. Its active product status indicates ongoing support from Analog Devices, with no immediate risk of obsolescence. The device’s robust ESD protection and wide operating temperature range (-40°C to +85°C) make it suitable for industrial and automotive applications.

Conclusion

The ADG711BRZ-REEL7 is a versatile and high-performance quad SPST analog switch that excels in low-voltage, low-power, and high-speed applications. Its low on-resistance, fast switching times, high bandwidth, and minimal power consumption make it an excellent choice for signal routing, multiplexing, and switching in a variety of systems, from consumer electronics to industrial automation. With its robust design, RoHS compliance, and compact SOIC packaging, the ADG711BRZ-REEL7 is a reliable and efficient solution for engineers seeking precision analog switching in their designs.