The AD7417 and AD7418 are 10-bit, 4-channel and single-channelADCs with an on-chip temperature sensor that can operate from asingle 2.7 V to 5.5 V power supply. The devices contain a 15 μssuccessive approximation converter, a 5-channel multiplexer, atemperature sensor, a clock oscillator, a track-and-hold, and areference (2.5 V). The AD7416ARM-REEL is a temperature-monitoring onlydevice in an 8-lead package.
The temperature sensor on the parts can be accessed via multiplexerChannel 0. When Channel 0 is selected and a conversionis initiated, the resulting ADC code at the end of the conversiongives a measurement of the ambient temperature (±1°C @ 25°C).On-chip registers can be programmed with high and low temperaturelimits, and an open-drain overtemperature indicator (OTI)output is provided, which becomes active when a programmedlimit is exceeded.
A configuration register allows programming of the sense of theOTI output (active high or active low) and its operating mode(comparator or interrupt). A programmable fault queue counterallows the number of out-of-limit measurements that mustoccur before triggering the OTI output to be set to preventspurious 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 threeLSBs of the AD7416/AD7417 serial bus address can be selected,which allows up to eight AD7416/AD7417 devices to be connectedto a single bus.
The AD7417 is available in a narrow body, 0.15 inch, 16-lead,small outline package (SOIC) and in a 16-lead, thin shrink,small outline package (TSSOP). The AD7416ARM-REEL and AD7418 areavailable in 8-lead SOIC and MSOP packages.
Product Highlights
Feature
- On-chip temperature sensor: −40°C to +125°C
- Overtemperature indicator
- Wide operating supply range: 2.7 V to 5.5 V
- 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
Applications
- Data acquisition with ambient temperature monitoring
- Industrial process control
- Automotive
- Battery-charging applications
- Personal computers
(Picture: Pinout)
