ADI AD7418ARZ-REEL

The AD7417 and AD7418 are 10-bit, 4-channel and single-channel ADCs with an on-chip temperature sensor that can operate from a single 2.7V to 5.5V power supply. The devices contain a 15μs successive approximation converter, a 5-channel multiplexer, a temperature sensor, a clock oscillator, a track-and-hold, and a reference (2.5V). The AD7416 is a temperature-monitoring only device in an 8-lead package. The temperature sensor on the parts can be accessed via multiplexer Channel 0. When Channel O is selected and a conversion is initiated, the resulting ADC code at the end of the conversion gives a measurement of the ambient temperature ±1°C at 25°C. On-chip registers can be programmed with high and low temperature limits, and an open-drain overtemperature indicator (OTI) output is provided, which becomes active when a programmed limit is exceeded. A configuration register allows programming of the sense of the OTI output (active high or active low) and its operating mode (comparator or interrupt). A programmable fault queue counter allows the number of out-of-limit measurements that must occur before triggering the OTI output to be set to prevent spurious triggering of the OTI output in noisy environments. An I²C compatible serial interface allows the AD7416/AD7417/AD7418 registers to be written to and read back. The three LSBs of the AD7416/AD7417 serial bus address can be selected, which allows up to eight AD7416/AD7417 devices to be connected to a single bus.

• 10-bit ADC with 15μs and 30μs conversion times
• Single and 4 single-ended analog input channels
• On-chip temperature sensor: -40°C to +125°C
• On-chip track-and-hold
• Overtemperature indicator
• Automatic power-down at the end of a conversion
• Wide operating supply range: 2.7V to 5.5V
• I²C-compatible serial interface
• Selectable serial bus address allows connection of up to 8 AD7416/AD7417 devices to a single bus
• AD7416 is a superior replacement for LM75

• Data acquisition with ambient temperature monitoring
• Industrial process control
• Automotive
• Battery-charging applications
• Personal computers