EEPROM Programming Temperature Range . ...-40NC to +85NC
Operating Junction Temperature Range ......... -55NC to +125NC
Storage Temperature Range............................ -55NC to +125NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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.
Recommended Operating Characteristics
(T
J
= -55NC to +125NC, unless otherwise noted.)
PARAMETER
Supply Voltage
Input Logic-High
Input Logic-Low
SYMBOL
V
DD
V
IH
V
IL
(Note 1)
(Note 1)
(Note 1)
CONDITIONS
MIN
1.7
0.7 x V
DD
-0.3
TYP
MAX
3.7
V
DD
+ 0.3
0.3 x V
DD
UNITS
V
V
V
DC Electrical Characteristics
(V
DD
= 1.7V to 3.7V, T
J
= -55NC to +125NC, unless otherwise noted.)
PARAMETER
MAX31722 Thermometer Error
MAX31723 Thermometer Error
Resolution
9-bit conversions
Conversion Time
t
CONVT
10-bit conversions
11-bit conversions
12-bit conversions
Logic 0 Output (SDO,
TOUT)
Logic 1 Output (SDO)
Leakage Current
V
OL
V
OH
I
L
Active temperature conversions (Note 4)
Communication only
Active Current
I
CC
EEPROM writes (-40NC to +85NC)
EEPROM writes during active temperature
conversions (-40NC to +85NC)
Shutdown Current
I
CC1
(Note 2)
(Note 3)
V
DD
-
0.4
-1
+1
1150
100
1150
1200
2
FA
FA
SYMBOL
T
ERR
T
ERR
CONDITIONS
-40NC to +85NC
-55NC to +125NC
0NC to +70NC
-55NC to +125NC
9
MIN
TYP
MAX
Q2.0
Q3.0
Q0.5
Q2.0
12
25
50
100
200
0.4
V
V
FA
ms
UNITS
NC
NC
Bits
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Maxim Integrated
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2
MAX31722/MAX31723
Digital Thermometers and Thermostats
with SPI/3-Wire Interface
AC Electrical Characteristics: 3-Wire Interface
(V
DD
= 1.7V to 3.7V, T
J
= -55NC to +125NC, unless otherwise noted.) (Figures 1, 2)
PARAMETER
Data to SCLK Setup
SCLK to Data Hold
SCLK to Data Valid
SCLK Low Time
SCLK High Time
SCLK Frequency
SCLK Rise and Fall
CE to SCLK Setup
SCLK to CE Hold
CE Inactive Time
CE to Output High-Z
SCLK to Output High-Z
SYMBOL
t
DC
t
CDH
t
CDD
t
CL
t
CH
t
CLK
t
R
, t
F
t
CC
t
CCH
t
CWH
t
CDZ
t
CCZ
(Note 6)
(Note 6)
(Note 6)
(Notes 5, 6)
(Notes 5, 6)
400
100
400
40
40
(Notes 5, 6)
(Notes 5, 6)
(Notes 5, 6, 7)
(Note 6)
(Note 6)
(Note 6)
100
100
DC
5.0
200
CONDITIONS
MIN
35
35
80
TYP
MAX
UNITS
ns
ns
ns
ns
ns
MHz
ns
ns
ns
ns
ns
ns
AC Electrical Characteristics: SPI Interface
(V
DD
= 1.7V to 3.7V, T
J
= -55NC to +125NC, unless otherwise noted.) (Figures 3, 4)
PARAMETER
Data to SCLK Setup
SCLK to Data Hold
SCLK to Data Valid
SCLK Low Time
SCLK High Time
SCLK Frequency
SCLK Rise and Fall
CE to SCLK Setup
SCLK to CE Hold
CE Inactive Time
CE to Output High-Z
SYMBOL
t
DC
t
CDH
t
CDD
t
CL
t
CH
t
CLK
t
R
, t
F
t
CC
t
CCH
t
CWH
t
CDZ
(Note 6)
(Note 6)
(Note 6)
(Notes 5, 6)
400
100
400
40
(Notes 5, 6)
(Notes 5, 6)
(Notes 5, 6, 7)
(Note 6)
(Note 6)
(Note 6)
100
100
DC
5.0
200
CONDITIONS
MIN
35
35
80
TYP
MAX
UNITS
ns
ns
ns
ns
ns
MHz
ns
ns
ns
ns
ns
AC Electrical Characteristics: EEPROM
(V
DD
= 1.7V to 3.7V, T
J
= -55NC to +125NC, unless otherwise noted.)
PARAMETER
EEPROM Write Cycle Time
EEPROM Write Endurance
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
SYMBOL
t
WR
N
EEWR
CONDITIONS
-40NC to +85NC (Note 8)
-40NC
P
T
A
P
+85NC (Note 8)
T
A
= +25NC (Note 8)
20,000
80,000
MIN
TYP
MAX
15
UNITS
ms
Cycles
All voltages are referenced to ground. Currents entering the IC are specified positive, and currents exiting the IC are negative.
Logic 0 voltages are specified at a sink current of 3mA.
Logic 1 voltages are specified at a source current of 1mA.
I
CC
specified with SCLK = V
DD
and CE = GND.
Measured at V
IH
= 0.7V x V
DD
or V
IL
= 0.3 x V
DD
and 10ms maximum rise and fall times.
Measured with 50pF load.
Measured at V
OH
= 0.7 x V
DD
or V
OL
= 0.3 x V
DD
. Measured from the 50% point of SCLK to the V
OH
minimum of SDO.
V
DD
must be > 2.0V during EEPROM write cycles.
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Maxim Integrated
│
3
MAX31722/MAX31723
Digital Thermometers and Thermostats
with SPI/3-Wire Interface
CE
t
CC
SCLK
t
CDH
t
DC
I/O*
A0
A1
A7
t
CDD
t
CCZ
t
CDZ
t
CDD
D0
D1
WRITE ADDRESS BYTE
*I/O IS SDI AND SDO CONNECTED TOGETHER.
READ DATA BIT
Figure 1. Timing Diagram: 3-Wire Read Data Transfer
t
CWH
CE
t
CC
t
CL
t
R
t
CCH
t
F
SCLK
t
CDH
t
DC
I/O*
A0
A1
A7
D0
t
CH
WRITE ADDRESS BYTE
*I/O IS SDI AND SDO CONNECTED TOGETHER.
WRITE DATA
Figure 2. Timing Diagram: 3-Wire Write Data Transfer
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Maxim Integrated
│
4
MAX31722/MAX31723
Digital Thermometers and Thermostats
with SPI/3-Wire Interface
CE
t
CC
SCLK
t
CDH
t
DC
SDI
A7
A6
A0
t
CDZ
SDO
D7
D6
D1
D0
t
CDD
t
CDD
WRITE ADDRESS BYTE
NOTE:
SCLK CAN BE EITHER POLARITY, TIMING SHOWN FOR CPOL = 1.
READ DATA BYTE
Figure 3. Timing Diagram: SPI Read Data Transfer
t
CWH
CE
t
CC
t
CL
t
R
t
F
t
CCH
SCLK
t
CDH
t
DC
SDI
A7
A6
A0
D7
t
CH
t
CDH
D0
WRITE ADDRESS BYTE
NOTE:
SCLK CAN BE EITHER POLARITY, TIMING SHOWN FOR CPOL = 1.
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