Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Package Thermal Characteristics (Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (θ
JA
) ...........28°C/W
Junction-to-Case Thermal Resistance (θ
JC
) ...................1.4°C/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer
board. For detailed information on package thermal considerations see
www.maximintegrated.com/thermal-tutorial.
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
(BAT = +6V to +26V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at BAT = +14V, T
A
= +25°C.) (Note 2)
PARAMETER
POWER SUPPLY
BAT Supply Range
V
BAT
V
BAT
= +14V, continuous scan (SC2 = 1,
SC1 = 1, SC0 = 0), programmable
hysteresis off (M0 = M1 = 1),
IN0–IN7 = unconnected, regulator on
(REGON =
REGOFF
= GND).
V
BAT
= +14V, continuous scan (SC2 = 1,
SC1 = 1, SC0 = 0), programmable
hysteresis off (M0 = M1 = 1),
IN0–IN7 = unconnected, regulator off
(REGON = BAT,
REGOFF
= GND).
6
26
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
BAT Supply Current with
Regulator On
I
SUP_REG
57
110
µA
BAT Supply Current with
Regulator Off
I
SUP
46
80
µA
BAT Supply Current in Scan
Mode with Regulator On
BAT Supply Current in Scan
Mode with Regulator Off
BAT Supply Current in Shutdown
Mode
BATREF Input Resistance
BATREF Input Leakage Current in
Shutdown
V
BAT
= +14V, scan mode (SC0 = 0,
I
SCAN_REG
SC1 = 0, SC2 = 0), regulator on
(REGON =
REGOFF
= GND).
I
SCAN
V
BAT
= +14V, scan mode (SC0 = 0,
SC1 = 0, SC2 = 0), regulator off
(REGON = BAT,
REGOFF
= GND).
V
SD
= 0V, V
BAT
= +14V,
REGON
= BAT
V
BATREF
= +14V
V
SD
= 0V, V
BATREF
= +14V
T
A
= +25°C
T
A
= +125°C
1
28
48
µA
17
3
4
2.7
35
5
7
µA
I
SHDN
R
BATREF
I
L_BATREF
µA
MΩ
1
µA
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Maxim Integrated | 2
MAX13037/MAX13038
Contact Monitor and Level
Shifters with LDO Regulator
Electrical Characteristics (continued)
(BAT = +6V to +26V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at BAT = +14V, T
A
= +25°C.) (Note 2)
PARAMETER
SWITCH INPUTS (IN0–IN7)
Input Voltage Threshold Center
(Note 3)
R
HYST
=
∞
or programmable hysteresis
disabled
R
HYST
= 90kΩ
R
HYST
=
∞
or programmable hysteresis
disabled
Input Voltage Threshold
Hysteresis (Note 4)
V
TH_HYS
R
HYST
= 90kΩ
R
HYST
= 0Ω
Switch-State Sense Resistor
Wetting Current Rise/Fall Time
(Note 5)
Wetting Current
IN0–IN7 Input Impedance in
Shutdown
ESD Protection IN0–IN7
SDO, DO1, DO2
Output Voltage High
SDO, DO1, DO2
Output Voltage Low
INT, OT, RST
Output Voltage Low
SD
Input Leakage Current
SD, REGON
Input Voltage Low
SD, REGON
Input Voltage High
REGON
Pullup Current
CS,
CLK, SDI,
REGOFF,
WDI
Input Voltage Low
CS,
CLK, SDI,
REGOFF,
WDI
Input Voltage High
CS,
CLK, WDI,
REGOFF
Input
Leakage Current
INT, OT, RST
Leakage Current
SDI Pulldown Resistor
R
SENSE
I
WET_RISE_
FALL
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
TH_C
0.425 x
0.5 x
0.575 x
V
BATREF
V
BATREF
V
BATREF
0.5 x
0.63 x
V
BATREF
V
BATREF
V
BATREF
0.133 x 0.166 x 0.22 x
V
BATREF
V
BATREF
V
BATREF
0. 26 x 0.361 x 0. 48 x
V
BATREF
V
BATREF
V
BATREF
0.5 x
V
BATREF
11
16
6
1
22
28
40
7.5
5.5
8.5
8
51
22
0.4 x
V
V
kΩ
µs
R
WET
= 61kΩ
R
WET
= 61kΩ
Rise
Fall
I
WET
R
WET
= 30kΩ
R
WET
= 330kΩ
V
SD
= 0V, V
IN
_ = +14V
Human Body Model (HBM)
mA
MΩ
kV
LOGIC-LEVELS (CS, CLK, SDI , SDI, DO0, DO1,
INT, OT, RST, SD, REGON, REGOFF)
V
OH
V
OL
V
INTL
I
L_SD
V
IL_SD
V
IH_SD
I
REGON
V
IL
V
IH
I
IL
I
OL
R
SDI
0.66 x V
LO
-1
-1
65
100
+1
+1
145
REGON
= 0
2.4
0.4
1
3.0
0.33 x V
LO
Source current = 2mA
Sink current = 4mA
Sink current = 4mA
V
SD
= V
BAT
= +14V
0.8 x V
LO
0.2 x V
LO
0.4
1
0.8
V
V
V
µA
V
V
µA
V
V
µA
µA
kΩ
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Maxim Integrated | 3
MAX13037/MAX13038
Contact Monitor and Level
Shifters with LDO Regulator
Electrical Characteristics (continued)
(BAT = +6V to +26V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at BAT = +14V, T
A
= +25°C.) (Note 2)
PARAMETER
LINEAR REGULATOR
Output Voltage
V
LO
MAX13037, V
BAT
= +14V, I
LOAD
= 1mA
MAX13038, V
BAT
= +14V, I
LOAD
= 1mA
I
LOAD
= 1mA to 50mA,
V
BAT
= +14V
Load Regulation
LOAD_REG
I
LOAD
= 1mA to 150mA,
V
BAT
= +14V
Line Regulation
Dropout Voltage
Output Current Limit
Power-Supply Rejection Ratio
Start-Up Time
RESET, WATCHDOG
Reset Reference Voltage
THERMAL SHUTDOWN
Thermal Shutdown Temperature
Thermal Shutdown Temperature
for Wetting Currents Only
Thermal Shutdown Hysteresis
T
SHDN
T
WARN
T
HYST
(Note 6)
(Note 7)
165
135
15
°C
°C
°C
V
RST
THRESH from high to low
1.20
1.24
1.28
V
V
LO
= +5V
(MAX13037)
V
LO
= +3.3V
(MAX13038)
V
LO
= +5V
(MAX13037)
V
LO
= +3.3V
(MAX13038)
-0.9
4.92
3.234
5.00
3.300
0.53
0.53
1
1
5.08
3.366
1
1
%
1.85
1.85
+0.9
330
1000
1300
150
68
1
mA
dB
ms
mV
mV/V
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LINE_REG V
BAT
= +6V to +26V
V
LO
= +5V, I
LO
= 50mA (MAX13037)
V
DROP
I
LIM
PSRR
t
START
V
LO
= +5V, I
LO
= 150mA (MAX13037)
V
LO
= +3.3V, I
LO
= 150mA (MAX13038)
V
BAT
= +14V
I
LO
= 10mA, f = 100Hz, 500mV
P-P
,
AC-coupled into V
BAT
Timing Characteristics
(BAT = +6V to +26V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at BAT = +14V, T
A
= +25°C.) (Note 2)
PARAMETER
IN0 to DO0 Propagation Delay,
IN1 to DO1 Propagation Delay
CLK Frequency
Falling Edge of
CS
to Rising
Edge of CLK
Required Setup Time
Falling Edge of CLK to Rising
Edge of
CS
Required Setup Time
SYMBOL
t
PROP
f
CLK
t
LEAD
V
BAT
= +6V
V
BAT
= +14V
Input rise/fall time < 2ns
Input rise/fall time < 2ns, Figure 1
110
CONDITIONS
MIN
TYP
22
22
5
MAX
35
UNITS
µs
MHz
ns
t
LAG
Input rise/fall time < 2ns, Figure 1
50
ns
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Maxim Integrated | 4
MAX13037/MAX13038
Contact Monitor and Level
Shifters with LDO Regulator
Timing Characteristics (continued)
(BAT = +6V to +26V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at BAT = +14V, T
A
= +25°C.) (Note 2)
PARAMETER
SDI to Falling Edge of CLK
Required Setup Time
Falling Edge of CLK to SDI
Required Hold Time
Time from Falling Edge of
CS
to
SDO Low Impedance
Time from Rising Edge of
CS
to
SDO High Impedance
Time from Rising Edge of CLK to
SDO Data Valid
Debounce Time
Scanning Time Pulse
Scanning Time Period
Wetting Time Pulse
Time from Shutdown to Normal
Operation
Time from SCAN Mode to Normal
Operation
Reset Output Pulse Width
Watchdog Timeout Period 1
Watchdog Timeout Period 2
Minimum Watchdog Timeout
Reset on WDI
SYMBOL
t
SI(SU)
t
SI(HOLD)
t
SO(EN)
t
SO(DIS)
t
VALID
t
DEB
t
SCAN
t
SCAN-P
t
WETT
t
SD
t
SM
t
RST
t
WD1
t
WD2
t
WDI
SC0 = 0, SC1 = 1, SC2 = 1
WTOFF = 0
SD
low-to-high transition to input monitoring
enabled
(Note 8)
C
TD
= 10nF (Figure 3)
C
TD
= 10nF, time before
INT
goes low
(Figure 3)
C
TD
= 10nF, time before
RST
goes low
(Figure 3)
300
10
40
CONDITIONS
Input rise/fall time < 2ns, Figure 1
Input rise/fall time < 2ns, Figure 1
Input rise/fall time < 2ns, Figure 1
Figures 1 and 2
C
SDO
=15pF, Figure 1
C
TDEB
= 500pF
C
TDEB
= 10nF
3.18
63
130
4
10
5.9
120
250
8
21
200
500
21
84
2 x t
WD1
36
144
MIN
30
20
55
55
70
9.42
188
400
14
35
TYP
MAX
UNITS
ns
ns
ns
ns
ms
ms
ms
µs
ms
ms
µs
µs
ms
ms
ms
ns
Note 2:
All units are 100% production tested at TA = 125°C. Limits over the operating temperature range are guaranteed by design and
not production tested.
Note
3:
VTH_C = (VTH_HIGH + VTH_LOW) / 2.
Note 4:
VTH_HYS = (VTH_HIGH - VTH_LOW).
Note 5:
Wetting current rise/fall time is measured as the time it takes to go from 20% to 80% of the maximum wetting current.
Note 6:
TSHDN is the temperature at which the wetting currents and LDO are disabled.
Note 7:
TWARN is the temperature at which only the wetting currents are disabled.
Note
8:
When exiting SCAN mode to enter Normal Mode (through SPI) any input change is ignored for 500µs (typ) to allow correct
wake-up of input comparators. After this time elapses, the inputs are monitored in continuous mode.
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