July 10, 2015 – Analog Devices (www.analog.com, NASDAQ: ADI), a global leader in high-performance semiconductors for signal processing applications, has launched a quad channel protector (ADG5462F) and two multiplexers (ADG5248F, ADG5249F) that provide ±55V overvoltage protection (OVP) to precision converters, amplifiers, and other components operating at low voltages of 4.5V through 36V. The ADG5462F quad channel protector, ADG5248F 8:1 multiplexer, and ADG5249F differential 4:1 multiplexer deliver ±55V OVP when power is on or off, and safely and precisely protect components during hot swap or operator error conditions, thereby also protecting downstream analog components. The newly launched products feature on-chip fault diagnostics that identify faulty channels and allow these channels to be avoided, simplifying fault detection algorithms and increasing system uptime. Additionally, the new products enable users to define the fault-trigger level independently from the primary power supply, maximizing design flexibility. Because there is no need to use multiple discrete protection components separately, the ADG5462F, ADG5248F, and ADG5249F optimize PCB area and simplify the design process. These newly launched products were developed to be optimized for precision instrumentation, process control, and avionics applications.

The ADG5248F 8:1 multiplexer and ADG5249F differential 4:1 multiplexer offer industry-leading performance with 70nA low-fault leakage and 20nA on-leakage, maximizing throughput in small-signal measurement devices such as thermocouples and resistance temperature detectors (RTD). In particular, the fault-induced leakage is 10 times lower than competing products. This superior performance level enables users to obtain accurate measurements when other multiplexer I/O channels are in a fault state due to overvoltage.

Key Features

- Overvoltage detection at power pins

- Minimum secondary supply level: 4.5V single supply

- Maximum ±55V overvoltage protection

- 4kV HBM (human body model) ESD (ADG5462F)

- Analog signal range from VSS to VDD

- ±5V to ±22V dual supply operation

- 8V to 44V single supply operation

- Fully specified at ±15V, ±20V, +12V, +36V

Operating temperature range: −40°C to +125°C

ADG5462F: Provides very low on-resistance of 10Ω and on-resistance flatness of 0.5Ω, minimizing total harmonic distortion of the system and improving noise performance.

ADG5248F/49F: Very low charge injection of 0.8pC and on-capacitance of 19pF improve accuracy and enable faster channel switching in multi-system applications.