GENERAL DESCRIPTION

The ADT74111 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.

FEATURES

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

APPLICATIONS

Portable battery-powered instruments

PCs

Smart battery chargers

Telecommunications systems electronic test equipment

Domestic appliances

Process controls