Overview
The ADG729BRU-REEL7, produced by Analog Devices Inc., is a CMOS analog matrix switch that features a serially controlled 2-wire interface compatible with the I2C™ interface standard. This device is a dual 4-channel matrix switch, making it versatile for use as a multiplexer, demultiplexer, or switch array. The ADG729 is designed to operate with a wide input signal range that extends to the supply voltages, and it exhibits closely matched on-resistance between switches, which remains flat over the full signal range.
Key Specifications
| Parameter | Typical Value | Maximum Value | Unit | Test Conditions/Comments |
|---|---|---|---|---|
| Analog Signal Range | 0 V to VDD | V | ||
| On Resistance (RON) | 2.5 Ω | 4.5 Ω | Ω | VS = 0 V to VDD, IS = 10 mA |
| On-Resistance Match Between Channels (∆RON) | 0.4 Ω | 0.8 Ω | Ω | VS = 0 V to VDD, IS = 10 mA |
| On-Resistance Flatness (RFLAT(ON)) | 0.75 Ω | 1.2 Ω | Ω | VS = 0 V to VDD, IS = 10 mA |
| Source OFF Leakage Current (IS (OFF)) | ±0.01 nA | ±0.1 nA | nA | VDD = 5.5 V, VD = 4.5 V/1 V, VS = 1 V/4.5 V |
| Drain OFF Leakage Current (ID (OFF)) | ±0.01 nA | ±0.1 nA | nA | VDD = 5.5 V, VD = 4.5 V/1 V, VD = 1 V/4.5 V |
| Continuous Current (D) | 30 mA | mA | ||
| Operating Temperature Range | –40°C to +85°C | °C | Industrial (B Version) | |
| Storage Temperature Range | –65°C to +150°C | °C | ||
| Junction Temperature | °C | |||
| Package | 16-Lead TSSOP |
Key Features
- Serial Interface: The ADG729 uses a 2-wire serial interface compatible with the I2C™ interface standard, allowing for easy communication and control.
- Dual 4-Channel Matrix Switch: This device features two independent 4-channel matrix switches, making it versatile for various switching configurations.
- Low On-Resistance: The on-resistance is closely matched between switches and remains flat over the full signal range, ensuring consistent performance.
- Low Leakage Currents: The device exhibits very low source and drain off-leakage currents, minimizing signal loss and ensuring high signal integrity.
- Break-Before-Make Switching: All channels exhibit break-before-make switching action, preventing momentary shorting when switching channels.
- External Address Pins: Two external address pins (A0 and A1) allow the user to set the 2 LSBs of the 7-bit slave address, enabling multiple devices to be connected to the same bus.
Applications
- Data Acquisition and Processing: The ADG729 is suitable for high-speed switching in data acquisition and processing applications due to its low on-resistance and flat on-resistance profile.
- Industrial Control Systems: Its robust design and low leakage currents make it ideal for use in industrial control systems where reliable signal routing is critical.
- Automotive Electronics: The device can be used in automotive electronics for reliable signal switching and routing, given its operating temperature range and low on-resistance.
- Medical Devices: The ADG729 can be used in medical devices that require precise and reliable signal switching, such as in diagnostic equipment and patient monitoring systems.
Q & A
- What is the ADG729BRU-REEL7?
The ADG729BRU-REEL7 is a CMOS analog matrix switch with a serially controlled 2-wire interface, featuring a dual 4-channel matrix switch configuration.
- What interface standard does the ADG729 use?
The ADG729 uses a 2-wire serial interface compatible with the I2C™ interface standard.
- What is the typical on-resistance of the ADG729?
The typical on-resistance of the ADG729 is 2.5 Ω.
- What is the maximum continuous current for the ADG729?
The maximum continuous current for the ADG729 is 30 mA.
- What is the operating temperature range of the ADG729?
The operating temperature range of the ADG729 is –40°C to +85°C.
- What package type is the ADG729 available in?
The ADG729 is available in a 16-lead TSSOP package.
- How are the channels controlled in the ADG729?
Each channel is controlled by one bit of an 8-bit word, allowing for various configurations where all, any, or none of the channels can be on at any time.
- What happens to the switches on power-up of the device?
On power-up, all switches will be in the OFF condition, and the internal shift register will contain all zeros.
- Does the ADG729 support multiple devices on the same bus?
Yes, the ADG729 supports multiple devices on the same bus, with two external address pins (A0 and A1) allowing the user to set the 2 LSBs of the 7-bit slave address.
- What is the significance of break-before-make switching in the ADG729?
The break-before-make switching action prevents momentary shorting when switching channels, ensuring reliable and safe operation.
