Temperature Sensor and 8-Channel ADC

ADT7411

*

Rev. A

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FEATURES

10-bit temperature-to-digital converter

10-bit 8-channel ADC

DC input bandwidth

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 1 µA

Double-buffered input logic

4-wire serial interface

SMBus packet error checking (PEC) compatible

16-lead QSOP package

APPLICATIONS

Portable battery-powered instruments

Personal computers

Smart battery chargers

Telecommunications systems electronic test equipment

Domestic appliances

Process control

PIN CONFIGURATION

ADT7411

TOP VIEW

(Not to Scale)

AIN6

1

AIN7

16

AIN5

2

AIN8

15

NC

3

AIN4

14

CS

4

SCL/SCLK

13

GND

5

SDA/DIN

12

DOUT/ADD

11

D+/AIN1

7

INT/INT

10

D–/AIN2

8

AIN3

9

NC = NO CONNECT

Figure 1.

GENERAL DESCRIPTION

The ADT7411 combines a 10-bit temperature-to-digital con-

verter and a 10-bit 8-channel ADC in a 16-lead QSOP package.

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,

that is controlled via the serial interface.

The ADT7411’s wide supply voltage range, low supply current,

applications, including personal computers, office equipment,

and domestic appliances.

*Protected by the following U.S. Patent Numbers: 6,169,442; 5,867,012; 5,764174. Other patents pending.