Operating Temperature Range ......................... -55°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................ -65°C to +150°C
Lead Temperature (soldering, 10s) ................................. +300°C
Soldering Temperature (reflow) .......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
(3.0V ≤ V
CC
≤ 5.5V, -55°C ≤ T
A
≤ +125°C,
unless otherwise noted. Typical values are at T
A
= +25°C, V
CC
= +3.3V, unless otherwise
noted.)
PARAMETER
TEMPERATURE
0°C ≤ T
RJ
≤ +125°C, T
A
= +30°C,
V
CC
= +3.3V
-55°C ≤ T
RJ
≤ +100°C, 0°C ≤ T
A
≤ +70°C,
V
CC
= +3.3V
-55°C ≤ T
RJ
≤ +145°C, 0°C ≤ T
A
≤ +70°C,
V
CC
= +3.3V
-55°C ≤ T
RJ
≤ +125°C, -55°C ≤ T
A
≤
+125°C,V
CC
= +3.3V
Power-Supply Sensitivity
Resolution
Time Between Conversion
Starts
Conversion Time
POWER SUPPLY
Supply Voltage Range
Supply Current, SCK Idle
V
CC
I
SDO
I
IDLE
I
CONV
Average Operating Current
Power-On Reset (POR)
Threshold
Current Sourcing for Diode
I
CC
Shutdown, V
CC
= +0.8V
ADC idle,
CS
= low
ADC converting
MAX6627
MAX6628
V
CC
, falling edge
High level
Low level
80
8
360
200
30
1.6
100
10
120
12
3.0
5.5
5
20
600
400
50
µA
V
µA
µA
V
t
SAMPLE
t
CONV
MAX6627
MAX6628
180
-1.0
-2.4
-4.5
-5.5
0.25
0.0625
0.5
8
250
320
±0.5
±1
+2.4
°C
+4.5
+5.5
0.7
°C/V
°C
s
ms
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Accuracy (Note 1)
www.maximintegrated.com
Maxim Integrated
│
2
MAX6627/MAX6628
Remote ±1°C Accurate Digital Temperature
Sensors with SPI-Compatible Serial Interface
Electrical Characteristics (continued)
(3.0V ≤ V
CC
≤ 5.5V, -55°C ≤ T
A
≤ +125°C,
unless otherwise noted. Typical values are at T
A
= +25°C, V
CC
= +3.3V, unless otherwise
noted.)
PARAMETER
LOGIC INPUTS (CS,
SCK)
Logic Input Low Voltage
Logic Input High Voltage
Input Leakage Current
LOGIC OUTPUTS (SDO)
Output Low Voltage
Output High Voltage
V
O
L
V
OH
I
SINK
= 1.6mA
I
SOURCE
= 1.6mA
V
CC
-
0.4
5
100
100
C
LOAD
= 10pF
C
LOAD
= 10pF
C
LOAD
= 10pF
C
LOAD
= 10pF
80
80
50
80
0.4
V
V
IL
V
IH
I
LEAK
V
CS
= V
SCK
= GND or V
CC
0.7 x
V
CC
1
0.3 x
V
CC
V
V
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TIMING CHARACTERISTICS
(Note 2, Figure 2)
Serial-Clock Frequency
SCK Pulse Width High
SCK Pulse Width Low
CS
Fall to SCK Rise
CS
Fall to Output Enable
CS
Rise to Output Disable
SCK Fall to Output Data Valid
f
SCL
t
CH
t
CL
t
CSS
t
DV
t
TR
t
DO
MHz
ns
ns
ns
ns
ns
ns
Note 1:
T
RJ
is the temperature of the remote junction.
Note 2:
Serial timing characteristics guaranteed by design.
www.maximintegrated.com
Maxim Integrated
│
3
MAX6627/MAX6628
Remote ±1°C Accurate Digital Temperature
Sensors with SPI-Compatible Serial Interface
Typical Operating Characteristics
(V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
AVERAGE OPERATING CURRENT
vs. SUPPLY VOLTAGE
MAX6627/8 toc01
MAX6627/8 toc02
AVERAGE OPERATING CURRENT (µA)
TEMPERATURE ERROR (°C)
250
200
150
100
50
0
MAX6627
2
1
0
-1
-2
T
A
= 0°C
T
A
= +25°C
POWER-ON-RESET THRESHOLD (V)
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
-55 -30
-5
20
45
70
95
T
A
= +70°C
MAX6628
MAX6627
3.0
3.5
4.0
4.5
5.0
5.5
-3
-55 -30
-5
20
45
70
95
120 145
120 145
SUPPLY VOLTAGE (V)
TEMPERATURE (
°
C)
TEMPERATURE (°C)
MAX6627/8 toc04
TEMPERATURE ERROR (°C)
8
6
4
2
0
TEMPERATURE (°C)
100
75
50
25
0
TEMPERATURE ERROR (°C)
10
125
4
3
2
1
0
V
IN
= 250mVp-p
10
100
1k
10k
100k
1M
10M 100M
-2
0
2
4
6
TIME (s)
8
10
12
14
0
5000
10,000
15,000
20,000
FREQUENCY (Hz)
CAPACITANCE (pF)
www.maximintegrated.com
Maxim Integrated
│
4
MAX6627/8 toc06
V
IN
= SQUARE WAVE
APPLIED TO V
CC
WITH NO
0.1µF CAPACITOR
MAX6627/8 toc05
12
TEMPERATURE ERROR vs.
POWER-SUPPLY NOISE FREQUENCY
RESPONSE TO THERMAL SHOCK
5
TEMPERATURE ERROR
vs. DXP/DXN CAPACITANCE
MAX6627/8 toc03
300
3
TEMPERATURE ERROR vs. TEMPERATURE
2.6
POWER-ON-RESET THRESHOLD
vs. TEMPERATURE
MAX6627/MAX6628
Remote ±1°C Accurate Digital Temperature
Sensors with SPI-Compatible Serial Interface
Pin Configurations
TOP VIEW
GND
DXN
DXP
1
2
3
8
N.C.
SDO
CS
SCK
N.C.
8
SDO
7
CS
6
SCK
5
MAX6627
7
6
5
MAX6627
MAX6628
+
1
2
3
DXP
GND DXN
EP
4
V
CC
V
CC
4
SOT23
TDFN
Pin Description
PIN
1
2
3
4
5
6
7
8
—
NAME
GND
DXN
DXP
VCC
SCK
CS
SDO
N.C.
EP
Ground
Combined Current Sink and ADC Negative Input for Remote Diode. DXN is normally biased to a diode
voltage above ground.
Combined Current Source and ADC Positive Input for Remote Diode. Place a 2200pF capacitor between
DXP and DXN for noise filtering.
Supply Voltage Input. Bypass with a 0.1µF to GND.
SPI Clock Input
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.
SPI Data Output
No Connect. Internally not connected. Can be connected to GND for improved thermal conductivity.
Exposed Pad. Internally connected to GND. Connect to a large ground plane to maximize thermal
performance. Not intended as an electrical connection point.
As time goes by, people are increasingly concerned about their own and their families' health. However, existing monitoring devices for individual vital signs have struggled to gain market share du...[详细]
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