SPI-/IC-Compatible, 10-Bit Digital Temperature Sensor and 8-Channel ADC

The ADT7411 combines a 10-bit temperature-to-digital converter and a 10-bit 8-channel ADC in a 16-lead QSOP. This includes a band gap temperature sensor and a 10-bit ADC to monitor and digitize the temperature reading to a resolution of 0.25°C. The ADT7411 operates from a single 2.7 V to 5.5 V supply. The input voltage on the ADC channels has a range of 0 V to 2.25 V and the input bandwidth is dc. The reference for the ADC channels is derived internally. The ADT7411 provides two serial interface options: a 4-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards, and a 2-wire SMBus/I2C interface. It features a standby mode that is controlled via the serial interface.

The ADT7411’s wide supply voltage range, low supply current, and SPI-/I2C-compatible interface make it ideal for a variety of applications, including PCs, office equipment, and domestic appliances.

Applications

* Portable battery-powered instruments

* PCs

* Smart battery chargers

* Telecommunications systems electronic test equipment

* Domestic appliances

* Process controls

* 10-bit temperature-to-digital converter

* 10-bit 8-channel ADC

* DC input bandwidth

* Input range: 0 V to 2.25 V and 0 V to VDD

* Temperature range: −40°C to +120°C

* Temperature sensor accuracy of ±0.5°C

* Supply range: 2.7 V to 5.5 V

* Power-down current : <10 μA

* Internal 2.25 VREF option

* Double-buffered input logic

* I2C, SPI, QSPI™, MICROWIRE™, and DSP compatible

* 4-wire serial interface

* SMBus packet error checking (PEC) compatible

* 16-lead QSOP