Overview
The ADG1438BRUZ-REEL7, produced by Analog Devices Inc., is a CMOS analog matrix switch that features an 8-channel configuration. This device is part of the ADG1438 series, which includes the ADG1438 and ADG1439 models. The ADG1438 is specifically designed as a single 8-channel matrix switch, while the ADG1439 is a dual 4-channel matrix switch. The ADG1438BRUZ-REEL7 operates with a versatile 3-wire serial interface compatible with standard SPI, QSPI™, MICROWIRE™, and DSP interface standards, allowing for clock rates up to 50 MHz.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Supply Voltage | ±15 V, +12 V, ±5 V | VDD = +15 V ± 10%, VSS = -15 V ± 10%, VDD = 12 V ± 10%, VSS = 0 V, VDD = +5 V ± 10%, VSS = -5 V ± 10% |
| Logic Supply Voltage | 2.7 V to 5.5 V | |
| Operating Temperature | -40°C to +125°C | |
| Package Type | 20-Lead TSSOP | |
| Clock Rate | Up to 50 MHz | |
| On Resistance | Ultralow on resistance | Varying with supply voltage |
| Break-Before-Make Switching | Yes | Prevents momentary shorting when switching channels |
| Power Dissipation | Ultralow power dissipation | iCMOS® construction |
Key Features
- Serial Interface: 3-wire serial interface compatible with SPI, QSPI™, MICROWIRE™, and DSP interface standards, operating at clock rates up to 50 MHz.
- Switch Configuration: 8-channel matrix switch with each switch controlled by a separate bit, allowing any, all, or none of the switches to be closed at any time.
- On Resistance: Ultralow on resistance and on-resistance flatness, making the device ideal for data acquisition and gain switching applications where low distortion is critical.
- Break-Before-Make Switching: Prevents momentary shorting when switching channels.
- Power-On Reset: All switches are off and the internal shift register is filled with zeros on power-up, with an additional RESET pin to clear registers to 0.
- Daisy-Chaining: The output of the shift register, SDO, enables multiple devices to be daisy-chained.
- Low Power Dissipation: iCMOS® construction ensures ultralow power dissipation, suitable for portable and battery-powered instruments.
Applications
- Data Acquisition: Ideal for applications where low distortion is critical due to its ultralow on resistance and on-resistance flatness.
- Gain Switching: Suitable for gain switching applications where low distortion is essential.
- Multiplexing and Demultiplexing: Each switch conducts equally well in both directions, making the device suitable for both multiplexing and demultiplexing applications.
- Portable and Battery-Powered Instruments: The ultralow power dissipation makes it ideal for use in portable and battery-powered instruments.
Q & A
- What is the ADG1438BRUZ-REEL7?
The ADG1438BRUZ-REEL7 is a CMOS analog matrix switch produced by Analog Devices Inc., featuring an 8-channel configuration with a 3-wire serial interface.
- What are the supply voltage options for the ADG1438BRUZ-REEL7?
The device can operate with supply voltages of ±15 V, +12 V, and ±5 V.
- What is the operating temperature range of the ADG1438BRUZ-REEL7?
The operating temperature range is -40°C to +125°C.
- What type of package does the ADG1438BRUZ-REEL7 come in?
The device comes in a 20-Lead TSSOP package.
- What is the maximum clock rate for the serial interface of the ADG1438BRUZ-REEL7?
The serial interface can operate at clock rates up to 50 MHz.
- Does the ADG1438BRUZ-REEL7 support daisy-chaining?
Yes, the device supports daisy-chaining through the output of the shift register, SDO.
- What are the key applications of the ADG1438BRUZ-REEL7?
The device is ideal for data acquisition, gain switching, multiplexing, and demultiplexing applications, as well as for use in portable and battery-powered instruments.
- How does the ADG1438BRUZ-REEL7 handle power-on reset?
On power-up, all switches are off, and the internal shift register is filled with zeros. The device also has a RESET pin to clear registers to 0.
- What is the significance of the iCMOS® construction in the ADG1438BRUZ-REEL7?
The iCMOS® construction ensures ultralow power dissipation, making the device suitable for portable and battery-powered instruments.
- Does the ADG1438BRUZ-REEL7 prevent momentary shorting when switching channels?
Yes, the device features break-before-make switching action to prevent momentary shorting when switching channels.
