EVALUATION KIT AVAILABLE
MAX14838/MAX14839
24V Pin-Configurable Industrial Sensor
Output Drivers
General Description
The MAX14838/MAX14839 24V/100mA drivers are
optimized for use in industrial sensors. These devices
integrate all of the high-voltage (24V) circuitry commonly
found in industrial sensors, including a configurable PNP/
NPN/push-pull driver and an integrated linear regulator
that meets common sensor power requirements.
The MAX14838/MAX14839 are pin-configurable. Logic
inputs allow the driver to be configured for high-side
(PNP), low-side (NPN), or push-pull operation. An
additional input allows the user to select between normal-
ly-open and normally-closed logic.
The MAX14838 features an onboard 5V linear regulator,
while the MAX14839 features a 3.3V linear regulator.
Each device includes two LED drivers for visual feedback.
One LED driver reflects the output logic status and the
other is a general-purpose driver that can be used to
signal a fault condition.
The DO output, supply (V
CC
), and ground (GND) pins are
reverse polarity-protected and are protected against IEC
ESD and surge events.
The MAX14838 and MAX14839 operate from a wide sup-
ply range and are available in a 12-pin TDFN-EP package
(3mm x 3mm) or a 12-bump wafer-level package (WLP)
(2.1mm x 1.6mm) and operate over the -40°C to +105°C
temperature range.
Ordering Information
appears at end of data sheet.
Benefits and Features
●
High Configurability Simplifies Design
• Pin-Selectable High-Side (PNP), Low-Side (NPN),
or Push-Pull Driver
•
Pin-Configurable NO/NC Logic
●
Integrated Protection Provides Robust Sensor
Solutions
• Reverse-Polarity Protection on DO, V
CC
, and GND
• 4.75V to 34V Supply Range (MAX14839)
• Driver is Short-Circuit Protected
• FAULT
Output for Fault Indication
• V
CC
Hot Plug Protection
• Thermal Shutdown Protection
•
±1kV/500Ω Surge Protection
• ±8kV IEC 61000-4-2 Air Gap ESD Protection
• ±6kV IEC 61000-4-2 Contact ESD Protection
• -40°C to +105°C Temperature Range
●
Fast Turn-Off of Inductive Loads Up to 1.5H
●
Saves Space on Board
• Available in 12-Pin TDFN-EP (3mm x 3mm) or
12-Bump WLP (2.1mm x 1.6mm)
• Dual Integrated 2mA LED Drivers
Applications
Typical Application Circuit
●
Industry Binary Sensors
●
Proximity Switches
●
Capacitive and Inductive Sensors
LDO
100nF
FAULT
SENSOR
AFE
LED2IN
DIN
NPN
PP
NO
LEDS
LED2
V
CC
100nF
24V
MAX14838
MAX14839
DO
OUT
GND
GND
19-7465; Rev 2; 6/15
MAX14838/MAX14839
24V Pin-Configurable Industrial Sensor
Output Drivers
Absolute Maximum Ratings
(All voltages referenced to GND, unless otherwise specified.)
V
CC
.........................................................................-36V to +36V
LDO .........................................................................-0.3V to +6V
DO
...........................................................
Higher of (V
CC
- 36V) and -36V
Lower of (V
CC
+ 36V) and +36V
DIN, NPN, PP, NO,
LDO2IN, FAULT
.......................-0.3V to +6V
LEDS, LED2 ....... -0.3V to the higher of (V
CC
- 0.3V) and +0.3V
Continuous Power Dissipation (T
A
= +70°C)
Multiple-Layer Board
(derate at 24.4mW/°C above +70°C) ........................1950mW
Operating Temperature Range ......................... -40°C to +105°C
Junction Temperature ...................................................... +150ºC
Storage Temperature Range .............................-65ºC to +150°C
Solder 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.
Package Thermal Characteristics
(Note 1)
Junction-to-Case Thermal Resistance (θ
JC
)
TDFN-EP ...................................................................8.5°C/W
Junction-to-Ambient Thermal Resistance (θ
JA
)
TDFN-EP .....................................................................41°C/W
WLP .............................................................................62°C/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
PARAMETER
POWER SUPPLY
Supply Voltage
(VCC = 4.75V to 34V (MAX14839), VCC = 7V to 34V (MAX14838), unless otherwise noted. VGND = 0V. All logic inputs are VLDO or
GND. TA = T
MIN
to T
MAX
. Typical values are at VCC = 24V, TA = +25°C) (Notes 2, 3)
SYMBOL
MAX14839
MAX14838
V
CC
= 24V, no external load on LDO,
DO is open-drain or push-pull mode, no
load on DO, LEDS, and LED2 off
V
CC
rising to DO
active
MAX14839
MAX14838
4.1
6.0
0.5
High-side on, I
DO
= -100mA,
Low-side on, I
DO
= 100mA,
(Note 4)
(Note 4)
PNP configuration, high-side off,
V
DO
= V
CC
-1V, V
CC
= 34V
NPN mode, low-side off, V
DO
= 0V
10
-35
120
145
350
20
-20
35
-10
V
CC
-
1.7
1.7
170
CONDITIONS
MIN
4.75
7
TYP
MAX
34
34
1.2
4.7
7.0
UNITS
V
CC
I
CC
V
TH
V
HTH
V
OH
V
OL
|I
OC
|
|I
CL
|
I
LDO_HS
I
LDO_LS
V
Supply Current
Power-On Reset (POR)
Threshold
POR Threshold Hysteresis
DRIVER (DO)
Output Voltage High
Output Voltage Low
Current Protection Threshold
Current Limit
DO Weak Pulldown Current in
PNP Mode
DO Weak Pullup Current in
NPN mode
mA
V
V
V
V
mA
mA
μA
μA
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MAX14838/MAX14839
24V Pin-Configurable Industrial Sensor
Output Drivers
Electrical Characteristics (continued)
(V
CC
= 4.75V to 34V (MAX14839), V
CC
= 7V to 34V (MAX14838), unless otherwise noted. VGND = 0V. All logic inputs are VLDO or
GND. T
A
= T
MIN
to T
MAX
, Typical values are at V
CC
= 24V, T
A
= +25°C)(Note 2, 3).
PARAMETER
DO Leakage Current in NPN
Mode
DO Output Negative Clamp
Voltage
DO Output Positive Clamp
Voltage
Input Logic-High Voltage
Input Logic-Low Voltage
Input Leakage Current
LED2IN
Input Pull-Up Current
LOGIC OUTPUT SIGNAL (FAULT)
FAULT
Output Low Voltage
FAULT
Output Leakage
V
OL
I
OL
I
LED
I
FAULT
= 1mA
V
FAULT
= 0V or 5.5V,
FAULT
is three-
stated
LEDS, LED2 on, V
LEDS/
V
LED2
= 4V
MAX14839, 4.75V ≤V
CC
≤ 34V,
I
LDO
= 30mA
MAX14838, 7V ≤V
CC
≤ 34V,
I
LDO
= 30mA
LDO short to GND
I
LDO
= 30mA
0.1mA ≤ I
LOAD
≤ 30mA, 100nF bypass
capacitor on LDO
T
SHDN
T
SHDN_HYST
Air-Gap Discharge, IEC 61000-4-2
Contact Discharge IEC 61000-4-2
Human Body Model, JESD22-A114E
IEC 61000-4-5, 0.5μF/500Ω
I
RP
Any combination of VCC, DO, and GND
-1
Temperature rising,
FAULT
asserted
-1
0.4
+1
V
μA
SYMBOL
I
DO_LEAK
V
CLN
V
CLP
CONDITIONS
V
CC
= 24V, V
DO
= 34V, DO is high
impedance
PNP mode, 100mA clamp current flow-
ing into DO
PNP mode, 100mA clamp current flow-
ing into DO
2.0
0.8
DIN, NPN, NO, PP, V
IN
= 0V or 5.5V
V
LED2IN
= 0V
-1
5
10
+1
15
MIN
TYP
MAX
200
V
CC
-
42
42
UNITS
μA
V
V
LOGIC INPUT SIGNALS (DIN, NPN, NO, PP,
LED2IN)
V
IH
V
IL
I
IL
I
PU
V
V
μA
μA
LED DRIVER OUTPUTS (LEDS, LED2)
LED Current Source
LINEAR REGULATOR (LDO)
3.0
4.5
30
3.3
5.0
45
0.06
2.8
+150
10
±8
±6
±2
±1
+1
3.6
V
5.5
mA
%
Ω
°C
°C
kV
kV
kV
kV
mA
V
LDO
I
LDO_SC
1.7
2
2.3
mA
Output Voltage
Short Circuit Current Limit
Line Regulation
Load Regulation
PROTECTION
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
ESD Protection
(V
CC
, DO, and GND) (Note 5)
ESD Protection (All Other Pins)
Surge Tolerance
Reverse Polarity Current
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MAX14838/MAX14839
24V Pin-Configurable Industrial Sensor
Output Drivers
AC Electrical Characteristics
(V
CC
= 4.75V to 34V (MAX14839), V
CC
= 7V to 34V (MAX14838), unless otherwise noted. VGND = 0V, All logic inputs are VLDO or
GND. T
A
= T
MIN
to T
MAX
, Typical values are at V
CC
= 24V, T
A
= +25°C)(Note 2, 3)
PARAMETER
POWER-ON RESET TIMING
POR Delay
DRIVER TIMING
Low-to-High Propagation Delay
t
PLH
V
CC
= 34V, C
L
= 1nF, R
L
= 10kΩ,
push-pull or PNP mode, 50% to 50%,
Figure 1
V
CC
= 34V, C
L
= 1nF, R
L
= 10kΩ,
push-pull or NPN mode, 50% to 50%,
Figure 1
V
CC
= 34V, C
L
= 1nF, R
L
= 10kΩ,
push-pull or PNP mode, 10% to 90%
V
CC
= 34V, C
L
= 1nF, R
L
= 10kΩ,
push-pull on NPN mode, 90% to 10%
(Note 4)
(Note 4)
112
3.75
5
20
μs
t
PUD
Delay after V
CC
rises above V
TH
until
DO is active
75
80
100
ms
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
High-to-Low Propagation Delay
DO Output Rise Time
DO Output Fall Time
t
PHL
t
RISE
t
FALL
5
6
6
20
20
20
μs
μs
μs
OVERCURRENT SHUTDOWN TIMING
Overcurrent Detection Time
Overcurrent Turn-Off Time
t
ISDET
t
ISOFF
150
5.0
μs
ms
Note 2:
All units are production tested at T
A
= +25°C. Specifications over temperature are guaranteed by design.
Note 3:
Currents into the device as positive; all currents out of the device are negative. All voltages are referenced to ground, unless
otherwise noted.
Note 4:
See the
DO Short-Circuit and Overcurrent Protection
section for detailed information.
Note 5:
ESD protection for VCC is achieved only with an external capacitor connected from VCC to GND. Connect 100nF capacitor
between VCC and GND for air-gap and contact discharge ESD.
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MAX14838/MAX14839
24V Pin-Configurable Industrial Sensor
Output Drivers
Test Circuits/Timing Diagrams
5V
MAX14838
MAX14839
50Ω
DIN
DO
C
L
R
L
DIN
0V
t
PHL
VCC
t
PLH
GND
DO
MAX14838/MAX14839
IN HIGH-SIDE OR PUSH-PULL MODE
0V
Figure 1. Propagation Delay Timing (NPN, PNP, or Push-Pull Mode)
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