Datasheet
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. Place a 2200pF capacitor between
DXP and DXN for noise filtering.
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 SDO SPI Data Output
8 N.C. No Connect. Internally not connected. Can be connected to GND for improved thermal conductivity.
— EP
Exposed Pad. Internally connected to GND. Connect to a large ground plane to maximize thermal
performance. Not intended as an electrical connection point.
0
1
3
2
4
5
MAX6627/8 toc06
CAPACITANCE (pF)
TEMPERATURE ERROR (°C)
0 10,0005000 15,000 20,000
TEMPERATURE ERROR
vs. DXP/DXN CAPACITANCE
0
25
50
75
100
125
-2 20 4 6 8 10 12 14
RESPONSE TO THERMAL SHOCK
MAX6627/8 toc05
TIME (s)
TEMPERATURE (°C)
10 100k 10M1k100 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
0.1µF CAPACITOR
V
IN
= 250mVp-p
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)
-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
50
100
150
200
250
300
3.0 4.03.5 4.5 5.0 5.5
AVERAGE OPERATING CURRENT
vs. SUPPLY VOLTAGE
MAX6627/8 toc01
SUPPLY VOLTAGE (V)
AVERAGE OPERATING CURRENT (µA)
MAX6627
MAX6628
MAX6627/MAX6628 Remote ±1ºC Accurate Digital Temperature
Sensors with SPI-Compatible Serial Interface
Maxim Integrated
│
4
www.maximintegrated.com
(V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
Typical Operating Characteristics
Pin Description