Rainbow Electronics MAX1299 - Manual (Page 10)

MAX1298/MAX1299
12-Bit Serial-Output Temperature Sensors
with 5-Channel ADC
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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 V DD 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.