AD7417BRZ-REEL7

10位数字温度传感器（ AD7416 ）和四单通道模数转换器 10-Bit Digital Temperature Sensor AD7416 and Four Single-Channel ADCs

Product Details

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 2.7 V to 5.5 V power supply. The devices contain a 15 μs successive approximation converter, a 5-channel multiplexer, a temperature sensor, a clock oscillator, a track-and-hold, and a reference 2.5 V. The AD7416 is a temperature-monitoring only device in an 8-lead package.

The temperature sensor on the parts can be accessed via multip-lexer Channel 0. When Channel 0 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 @ 25°C. On-chip registers can be programmed with high and low tempera-ture 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.

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 AD7416 and AD7418 are available in 8-lead SOIC and MSOP packages.

**Product Highlights**

1. The AD7416/AD7417/AD7418 have an on-chip temperature sensor that allows an accurate measurement of the ambient temperature ±1°C @ 25°C, ±2°C overtemperature to be made. The measurable temperature range is −40°C to +125°C. An overtemperature indicator is implemented by carrying out a digital comparison of the ADC code for Channel 0 temperature sensor with the contents of the on-chip TOTI setpoint register.

2. The AD7417 offers a space-saving, 10-bit analog-to-digital solution with four external voltage input channels, an on-chip temperature sensor, an on-chip reference, and a clock oscillator.

3. The automatic power-down feature enables the AD7416/ AD7417/AD7418 to achieve superior power performance. At slower throughput rates, the part can be programmed to operate in a low power shutdown mode, allowing further savings in power consumption.

**Applications**

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Data acquisition with ambient temperature monitoring

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Industrial process control

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Automotive

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Battery-charging applications

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Personal computers

### Features and Benefits

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10-bit ADC with 15 μs and 30 μs conversion times

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Single and 4 single-ended analog input channels

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On-chip temperature sensor:

−40°C to +125°C

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On-chip track-and-hold

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Overtemperature indicator

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Automatic power-down at the end of a conversion

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Wide operating supply range: 2.7 V to 5.5 V

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I2C-compatible serial interface

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Selectable serial bus address allows connection of up to 8 AD7416/AD7417 devices to a single bus

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AD7416 is a superior replacement for LM75

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