Typical operating characteristics, Pin description – Rainbow Electronics MAX6628 User Manual
Page 4
MAX6627/MAX6628
Remote ±1°C Accurate Digital Temperature
Sensors with SPI-Compatible Serial Interface
4
_______________________________________________________________________________________
0
50
100
150
200
250
300
3.0
4.0
3.5
4.5
5.0
5.5
AVERAGE OPERATING CURRENT
vs. SUPPLY VOLTAGE
MAX6627/8 toc01
SUPPLY VOLTAGE (V)
AVERAGE OPERATING CURRENT (
µ
A)
MAX6627
MAX6628
-3
-2
-1
0
1
2
3
-55
-5
-30
20
45
70
95
120 145
TEMPERATURE ERROR vs. TEMPERATURE
MAX6627/8 toc02
TEMPERATURE (
°C)
TEMPERATURE ERROR (
°C)
T
A
= +25
°C
T
A
= 0
°C
MAX6627
T
A
= +70
°C
0.6
1.0
0.8
1.4
1.2
1.8
1.6
2.0
2.4
2.2
2.6
-55
-5
20
45
-30
70
95
120 145
POWER-ON-RESET THRESHOLD
vs. TEMPERATURE
MAX6627/8 toc03
TEMPERATURE (
°C)
POWER-ON-RESET THRESHOLD (V)
Typical Operating Characteristics
(V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
PIN
NAME
FUNCTION
1
GND
Ground
2
DXN
Combined Current Sink and ADC Negative Input for Remote Diode. DXN is normally biased to a diode
voltage above ground.
3
DXP
Combined Current Source and ADC Positive Input for Remote Diode
4
V
CC
Supply Voltage Input. Bypass with a 0.1µF to GND.
5
SCK
SPI Clock Input
6
CS
Chip Select Input. Pulling
CS low initiates an idle state, but the SPI interface is still enabled. A rising edge
of
CS initiates the next conversion.
7
SO
SPI Data Output
8
N.C.
No Connect. Can be connected to GND for improved thermal conductivity.
Pin Description
10
100k
10M
1k
100
10k
1M
100M
TEMPERATURE ERROR vs.
POWER-SUPPLY NOISE FREQUENCY
MAX6627/8 toc04
FREQUENCY (Hz)
TEMPERATURE ERROR (
°C)
0
4
2
6
8
10
12
V
IN
= SQUARE WAVE
APPLIED TO V
CC
WITH NO
0.1
µF CAPACITOR
V
IN
= 250mVp-p
0
25
50
75
100
125
-2
2
0
4
6
8
10
12
14
RESPONSE TO THERMAL SHOCK
MAX6627/8 toc05
TIME (s)
TEMPERATURE (
°C)
0
1
3
2
4
5
MAX6627/8 toc06
CAPACITANCE (pF)
TEMPERATURE ERROR (
°C)
0
10,000
5000
15,000
20,000
TEMPERATURE ERROR
vs. DXP/DXN CAPACITANCE