12-Bit Serial-Output Temperature Sensors

with 5-Channel ADC

10

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Pin Description

PIN

NAME

FUNCTION

1

AIN1

Analog Input 1. Negative differential input relative to AIN0 or positive differential input relative to AIN5

(Table 5). Connect to the cathode of external diode 1 for remote temperature sensing.

2

SHO

Shield Output. Used to suppress leakage currents at the anodes of remote temperature sensors (see Remote

Diode Shielding). May also be connected to the shield of twisted-pair input cables used for remote

temperature measurements. Leave unconnected for other applications.

3

AIN2

Analog Input 2. Positive differential input relative to AIN3 or positive differential input relative to AIN5

(Table 5). Connect to the anode of external diode 2 for remote temperature sensing.

4

AIN3

Analog Input 3. Negative differential input relative to AIN2 or positive differential input relative to AIN5

(Table 5). Connect to the cathode of external diode 2 for remote temperature sensing.

5

AIN4

Analog input 4. Positive differential input relative to AIN5 (Table 5).

6

GND

Ground. Connect to pin 13.

7

SSTRB

Serial Strobe Output. SSTRB goes low at the beginning of an A/D conversion, and it goes high when the

conversion is finished.

8

CS

Active-Low Chip Select. Data will not be clocked into DIN unless CS is low. When CS is high, DOUT is at high

impedance.

9

DOUT

Serial Data Output. DOUT transitions on the falling edge of SCLK.

10

DIN

Serial Data Input. DIN latches data on the rising edge of SCLK.

11

SCLK

Serial Clock Input. Clocks data in and out of the serial interface.

12

Positive Supply Voltage. Bypass with a 0.1

µF capacitor to GND (pin 13).

13

GND

Ground (star ground)

14

REF

Reference-Buffer Output/ADC Reference Input. Reference voltage for A/D conversion. Bypass to GND (pin 13)

with a 0.1

µF capacitor. Select reference mode by writing to configuration byte (Table 2).

15

AIN5

Analog Input 5. Negative differential input relative to AIN0–AIN4 (Table 5).

16

AIN0

Analog Input 0. Positive differential input relative to AIN1 or positive differential input relative to AIN5

(Table 5). Connect to the anode of external diode 1 for remote temperature sensing.