12-Bit + Sign Digital Temperature Sensors
with Serial Interface
Typical Operating Characteristics
(V CC = +3.3V, T A = +25°C, unless otherwise noted.)
400
OPERATING SUPPLY CURRENT
vs. TEMPERATURE
2.6
POWER-ON RESET (POR)
THRESHOLD vs.TEMPERATURE
3
TEMPERATURE ERROR
vs. TEMPERATURE
350
V CC = +5.5V
V CC = +4.5V
V CC = +5.0V
2.4
2.2
2
300
2.0
1
250
V CC = +3.3V
1.8
1.6
0
200
V CC = +3.0V
V CC = +3.6V
1.4
1.2
-1
-2
150
100
MAX6629
1.0
0.8
0.6
-3
-4
MAX6629
-55 -30
-5
20
45
70
95
120 145
-55 -30
-5
20
45
70
95
120 145
-55 -30
-5
20
45
70
95
120 145
TEMPERATURE ( ° C)
TEMPERATURE ERROR
TEMPERATURE ( ° C)
TEMPERATURE ( ° C)
vs. POWER-SUPPLY NOISE FREQUENCY
RESPONSE TO THERMAL SHOCK
12
V IN = SQUARE WAVE
10
8
6
4
2
0
APPLIED TO V CC WITH NO
0.1 μ F CAPACITOR
V IN = 250mV P-P
125
100
75
50
25
0
10
100
1k
10k
100k
1M
10M 100M
-2
0
2
4
6
8
10
12
14
FREQUENCY (Hz)
TIME (s)
Pin Description
PIN
MAX6629
MAX6630
MAX6631
MAX6632
NAME
FUNCTION
1
2
2
1
N.C.
GND
No Connect. Connect to ground plane for better thermal performance to the PC board.
Ground
Supply Voltage Input. Bypass V CC to GND with a 0.1μF capacitor. V CC can also be
3
3
V CC
powered from a logic output as long as the voltage level is greater than 3.0V and the
logic output is not noisy. Setting the logic output low provides a hardware shutdown
mode.
4
5
6
4
5
6
SCK
CS
SO
EP
Serial Clock Input
Chip-Select Input. Enables the interface. A rising edge off CS initiates the next
conversion. Pulling CS low initiates an idle state.
Serial Data Output
Exposed Pad (TDFN only). Connect to GND or leave unconnected.
4
_______________________________________________________________________________________
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