MAX22191_V01 [MAXIM]
Ultra-Low-Power, Parasitically Powered Digital Input;
| 型号： | MAX22191_V01 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Ultra-Low-Power, Parasitically Powered Digital Input |
| 文件： | 总13页 (文件大小：498K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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MAX22191
Ultra-Low-Power, Parasitically Powered
Digital Input
General Description
Benefits and Features
The MAX22191 is an IEC 61131-2 compliant, industrial
digital input (DI) device. The MAX22191 translates a 24V
industrial switching signal to a 3.3V/5V CMOS-level
output, or to a 2.3mA (typ) current output for driving an
optocoupler and/or LED. Voltage thresholds and current
levels in the MAX22191 are compliant with Type 1 and
Type 3 inputs, while minimizing power dissipation. The
MAX22191 is also compliant with 48V inputs, with the
addition of external resistors.
● High Integration for Flexible Circuit Designs
• Interfaces to Optocouplers or Digital Isolators
• Capable of Driving an Optocoupler and Status LED
• Operational as Sink or Source Digital Input
• Ultra-High Speed: 250ns (max) Propagation Delay
• Test Pulse Diagnostic
• Allows for Small Footprint TVS Surge Protection
● Reduced Power and Heat Dissipation
• Parasitically Powered from the Field Input
• Accurate ±15% Input-Current Limiting
• 100µA (typ) Quiescent Current with Optocoupler
• 96% (typ) Current-Transfer Efficiency to Optocoupler
● Robust Design
Operating power is derived from the input signal, eliminating
the need for an external field-side power supply. A 250ns
(max) fast response time is ideal for high-speed inputs.
Additionally, a CMOS-compatible test input is available for
safety diagnostics.
• Operates from -60V to +60V Input Voltage
• -40°C to +125°C Ambient Operating Temperature
The MAX22191 features robust functionality for harsh
industrial systems and is capable of normal operation with
input signals ranging from -60V to +60V. Integrated thermal
Ordering Information appears at end of data sheet.
shutdown further protects the device when V
is present.
CC
The MAX22191 is available in a small, 6-lead SOT23
package and operates over the -40°C to +125°C ambient
temperature range.
Applications
● Process Automation
● Industrial Automation
● Motor Controls
● Individually Isolated Inputs
● Current Sourcing Inputs
Simplified Block Diagram
MAX22191
OUT
IN
TEST
REXT
2.3mA
V
CC
INT
REF
GND
19-100229; Rev 1; 10/20
MAX22191
Ultra-Low-Power, Parasitically Powered
Digital Input
Absolute Maximum Ratings
(All voltages referenced to GND, unless otherwise stated)
Continuous Power Dissipation (T = +70°C)
A
V
........................................................................-0.3V to +6V
6L SOT23 (derate at 8.7mW/°C above +70°C) ...........696mW
CC
IN ...........................................................................-70V to +60V
TEST .......................................................................-0.3V to +6V
Operating Temperature Range
Ambient Temperature ................................... -40°C to +125°C
Junction Temperature..................................................+150°C
Storage Temperature Range............................ -65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering (reflow) ............................................................+260°C
OUT (3.0V ≤ V
≤ 5.5V) ........................ -0.3V to (V
+ 0.3V)
CC
CC
OUT (V
= 0V).......................-0.3V to min [(V + 0.3V), +6V]
CC
IN
REXT (3.0V ≤ V
≤ 5.5V) ...................... -0.3V to (V
+ 0.3V)
CC
CC
REXT (V
= 0V).....................-0.3V to min [(V + 0.3V), +6V]
CC
IN
Short-Circuit Duration
OUT to GND..........................................................Continuous
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 Information
PACKAGE TYPE: 6 SOT23
Package Code
U6-1
Outline Number
21-0058
90-0175
Land Pattern Number
THERMAL RESISTANCE, FOUR-LAYER BOARD
Junction to Ambient (θ
)
115°C/W
80°C/W
JA
Junction to Case (θ
)
JC
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.
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
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MAX22191
Ultra-Low-Power, Parasitically Powered
Digital Input
DC Electrical Characteristics
V
= 0V to 60V, V
= 0V, T = -40°C to +125°C, unless otherwise noted. Typical values are at V = 24V, R = 40.2kΩ (±1%),
EXT
IN
CC
A
IN
and T = +25°C. (Notes 1, 2)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DIGITAL INPUT (IN)
IN Functional Operating Range
IN Voltage Upper Threshold
V
-60
+60
10
V
IN_F
V
= 0V
CC
V
OUT is high
OUT is low
V
V
3.0V ≤ V
(Note 3)
≤ 5.5V
≤ 5.5V
≤ 5.5V
INTHU
CC
CC
CC
10
V
= 0V
7
CC
IN Voltage Lower Threshold
V
INTHL
3.0V ≤ V
(Note 3)
7
V
= 0V
1.5
1.5
`
V
= 7V, steady
CC
IN
IN Current Low
I
state, R
=
mA
mA
3.0V ≤ V
(Note 3)
INL
EXT
40.2kΩ, V
= 3V
OUT
IN Boost Current
I
V
< V
(Note 4)
4
5.5
2.7
INB
INH
IN
IN
INTHU
V
V
= 0V
= 0V to 5.5V
CC
2.1
2.1
2.4
V
= 10V to 36V,
OUT
IN Current High
I
steady state,
mA
3.0V ≤ V
(Note 3)
≤ 5.5V
CC
R
= 40.2kΩ
EXT
2.75
OUTPUT (OUT)
OUT High Current
I
V
V
= 0.5V to 5.5V, V = 10V, V
= 0V
2
2.3
mA
OUTH
OUT
IN
CC
OUT Low Current
I
< V , V = 0V
INTHL OUT
-1
+1
μA
OUTL
IN
V
CC
0.4
-
OUT Voltage High
V
3.0V ≤ V
≤ 5.5V, I
= 1mA (Note 3)
V
V
OH
CC
CC
LOAD
SINK
OUT Voltage Low
V
3.0V ≤ V
≤ 5.5V, I
= 1mA (Note 3)
0.4
OL
AUXILIARY POWER SUPPLY (V
Auxiliary Power Supply Range
)
CC
V
(Note 5)
3.0
5.5
400
600
V
CC
V
V
= 3.0V
= 5.5V
270
380
CC
CC
Auxiliary Power Supply Current
TEST INPUT
I
μA
CC
3.0V ≤ V
≤ 5.5V
≤ 5.5V
(2/3)V
2.8
CC
CC
TEST Input High Threshold
V
V
TESTH
V
= 0V
CC
3.0V ≤ V
V
/3
CC
CC
TEST Input Low Threshold
V
V
TESTL
V
= 0V
CC
1.3
TEST Input Pulldown Resistance
PROTECTION
R
250
kΩ
PD
Thermal Shutdown Threshold
T
(Note 6)
160
23
°C
°C
kV
SHDN
Thermal Shutdown Hysteresis
ESD (All Pins)
T
SHDN_HYS
Human Body Model
±2
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MAX22191
Ultra-Low-Power, Parasitically Powered
Digital Input
AC Electrical Characteristics
V
= 0V to 60V, V
= 0V, T = -40°C to +125°C, unless otherwise noted. Typical values are at V = 24V, R
= 40.2kΩ (±1%),
IN
CC
A
IN
EXT
and T = +25°C. (Note 1)
A
PARAMETER
SYMBOL
CONDITIONS
= 0V,
MIN
TYP
MAX
UNITS
V
CC
250
R = 1.5kΩ
IN to OUT Low-to-High Propagation
Delay
C = 15pF,
L
Figure 1
L
t
ns
PDLH
V
= 3.0V,
CC
200
250
200
R is open
L
V
= 0V,
CC
R = 1.5kΩ
IN to OUT High-to-Low Propagation
Delay
C = 15pF,
L
Figure 1
L
t
ns
ps
ns
PDHL
V
= 3.0V,
CC
R is open
L
IN to OUT Propagation Delay Jitter
C = 15pF, RMS jitter, Figure 1
250
L
V
= 0V,
CC
195
75
R = 1.5kΩ,
IN to OUT Propagation
Delay Skew, Part-to-Part
C = 15pF,
L
L
t
SKEWP2P
Figure 1 (Note 5)
3.0V ≤ V
≤ 5.5V,
CC
R is open
L
TEST low to high,
OUT high to low
1.5
1.8
V
V
= 0V or 3V,
= 11V
CC
μs
TEST Propagation Delay
TEST high to low,
OUT low to high
IN
Note 1: All units are production tested at T = +25°C. Specifications over temperature are guaranteed by design and characterization.
A
Note 2: All voltages are referenced to ground, unless otherwise noted.
Note 3: V
is an auxiliary supply input. When V
is powered from an external 3V to 5.5V supply, the propagation delay is
CC
CC
reduced and the output changes from a current souce to a CMOS output. When using power from IN to power the device,
connect V to GND (V = 0V).
CC
CC
Note 4: See the Boost Current section for more information.
Note 5: Not production tested. Guaranteed by design
Note 6: Thermal shutdown protection is only enabled when V
is present. Thermal shutdown does not occur when V
CC
= 0V.
CC
IN
OUT
V
INTHU
90%
V
IN
V
INTHL
TEST
0V
MAX22191
C
R
L
L
R
EXT
V
t
PDLH
CC
t
PDHL
I
OUT
+
-
10%
0mA
GND
Figure 1. Propagation Delay Test Circuit and Timing Diagram
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MAX22191
Ultra-Low-Power, Parasitically Powered
Digital Input
Typical Operating Characteristics
(V = 24V, R
= 40.2kΩ (±1%), R = 1.5kΩ on OUT, T = +25°C, unless otherwise noted.)
IN
EXT
L
A
IN CURRENT vs. VOLTAGE
(VCC = 0V)
IN CURRENT vs. VOLTAGE
(VCC = 3.3V)
INPUT AND OUTPUT CURRENT
vs. INPUT VOLTAGE
toc01
toc02
toc03
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
VCC = 0V
RL = 1.5kΩ
VCC = 3.3V
RL = 1.5kΩ
TA = +25ºC
IIN
,
IIN
,
IN RISING
IN FALLING
TA = +125ºC
TA = +125ºC
TA = -40ºC
IOUT
,
IN RISING
TA = +25ºC
TA = -40ºC
IOUT
,
IN FALLING
VCC = 0V
-60 -50 -40 -30 -20 -10
0
10 20 30 40 50 60
-60 -50 -40 -30 -20 -10
0
10 20 30 40 50 60
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
IN VOLTAGE (V)
IN VOLTAGE (V)
IN VOLTAGE (V)
LOWER VOLTAGE THRESHOLD
vs. TEMPERATURE
UPPER VOLTAGE THRESHOLD
vs. TEMPERATURE
IN, OUT CURRENT vs. OUT VOLTAGE
toc06
toc04
toc05
9.0
8.8
8.6
8.4
8.2
8.0
7.8
7.6
7.4
7.2
7.0
10.0
9.8
9.6
9.4
9.2
9.0
8.8
8.6
8.4
8.2
8.0
2.50
2.45
2.40
2.35
2.30
2.25
2.20
2.15
2.10
2.05
2.00
100
98
96
94
92
90
88
86
84
82
80
IIN
IOUT/IIN
IOUT
VIN = 11V
VCC = 0V
TEST = 0V
0
1
2
3
4
5
6
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (ºC)
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (ºC)
VOUT (V)
IN AND OUT CURRENT
vs. REXT RESISTANCE
REVERSE VOLTAGE INPUT CURRENT
vs. TEMPERATURE
IN CURRENT vs. TEMPERATURE
toc09
toc07
toc08
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
5
VIN = -30V
VIN = +30V
4
3
IN CURRENT
2
1
0
OUT CURRENT
-1
-2
-3
-4
-5
VIN = 24V
VCC = 0V
36 37 38 39 40 41 42 43 44 45
REXT (kΩ)
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (ºC)
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (ºC)
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MAX22191
Ultra-Low-Power, Parasitically Powered
Digital Input
Typical Operating Characteristics (continued)
(V = 24V, R
EXT
= 40.2kΩ (±1%), R = 1.5kΩ on OUT, T = +25°C, unless otherwise noted.)
L A
IN
PROPAGATION DELAY vs. TEMPERATURE
PROPAGATION DELAY vs. TEMPERATURE
(VCC = 0V)
(VCC = 3.3V)
toc10
toc11
250
250
IN PULSED FROM 0V TO 24V
225
200
175
150
125
100
75
IN PULSED FROM 0V TO 24V
NO LOAD ON OUT
225
200
175
150
125
100
75
tPDLH
tPDLH
tPDHL
tPDHL
50
50
25
25
0
0
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (ºC)
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (ºC)
PROPAGATION DELAY vs. IN VOLTAGE
PROPAGATION DELAY vs. IN VOLTAGE
(VCC = 0V)
(VCC = 3.3V)
toc12
toc13
250
225
200
175
150
125
100
75
250
225
200
175
150
125
100
75
NO LOAD ON OUT
tPDLH
tPDLH
tPDHL
tPDHL
50
50
25
25
0
0
10 15 20 25 30 35 40 45 50 55 60
IN VOLTAGE (V)
10 15 20 25 30 35 40 45 50 55 60
IN VOLTAGE (V)
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MAX22191
Ultra-Low-Power, Parasitically Powered
Digital Input
Pin Configurations
TOP VIEW
+
1
2
3
6
5
4
IN
OUT
VCC
TEST
MAX22191
GND
REXT
SOT23-6
Pin Description
PIN
NAME
FUNCTION
Digital Input. Connect IN directly to the input signal. Connect suitable TVS between IN and
GND for surge protection.
1
IN
2
GND
REXT
Ground
Reference Current Resistor Connection. Connect an external 40.2kΩ (±1%) resistor
between REXT and GND.
3
Test Pulse Input. When IN is high, toggle TEST from low-to-high to verify that OUT toggles
from high-to-low.
4
TEST
Auxiliary Supply Input. For a parasitically powered circuit, connect V
to GND. To power
CC
5
6
V
the device from a local power supply, connect V
GND with a 1μF capacitor when powered from a local supply.
to a 3.0V to 5.5V source. Bypass V
to
CC
CC
CC
OUT
Output Signal. Connect OUT to the anode of an optical LED, or to the input of a digital circuit.
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MAX22191
Ultra-Low-Power, Parasitically Powered
Digital Input
Boost Current
Detailed Description
The MAX22191 features an integrated current source, volt-
age comparator, and current steering network to create an
input load compliant with IEC 61131-2 Type 1 and Type 3
To allow for a faster response time, the MAX22191
includes a boost current, I
boost current is used to set and stabilize the output
current while the voltage on IN is rising (V < V ).
, during IN power up. The
INB
24V
inputs, while generating a drive current for opto-
IN
INTHU
DC
When V > V
, and the output current is enabled,
isolators that turn-on/-off in compliance with the voltage
thresholds of the standard. The addition of external voltage-
dropping resistors also allows the MAX22191 to operate
IN
INTHU
the input current is the sum of both the output current and
boost current (I + I ) for a short period before the
INB
INH
output current is steady at 2.3mA (typ).
with 48V
inputs (see the Typical Operating Circuits).
DC
Power-Up/Power-Down
Integrated Diagnostic (TEST) Input
As the input voltage (V ) rises, the MAX22191 transitions
IN
The MAX22191 features an integrated TEST input for
easy diagnostic checks. When IN is high, toggle TEST
from low-to-high to verify that OUT toggles high-to-low.
See Table 1. The current on IN is not affected during this
diagnostic test.
through three phases of operation:
Phase 1: V is rising but is inadequate to fully power the
IN
current source or voltage comparator. Any current that does
flow into the MAX22191 is diverted to GND through the inter-
nal current steering switches, bypassing the optical isolator.
When IN is low, TEST has no effect on OUT, it remains low.
Phase 2: V continues to increase to a level that is
IN
adequate to power the comparator and the current
source, but the input voltage threshold has not been
reached. The output of the internal current source
continues to be diverted to GND.
Table 1. TEST Mode Functionality
IN
TEST
OUT
Low
Low
High
Low
< V
< V
Low
INTHL
INTHL
INTHU
INTHU
High
Low
Phase 3: V exceeds the comparator threshold (V
),
IN
INTHU
and the current is switched to the OUT pin. If connected to
an external optical isolator, the current passes through the
LED and returns to the negative field input.
≥ V
≥ V
High
As V drops, the phases are reversed. The internal
IN
current source is switched from OUT to GND when V
IN
falls below the lower voltage threshold (V
).
INTHL
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MAX22191
Ultra-Low-Power, Parasitically Powered
Digital Input
61131-2 standard, when the device is powered. Figure 2 is
an example of a current sinking configuration with a status/
indicator LED in the output line. When the input voltage is
Applications Information
Powering the MAX22191 With the V
The MAX22191 can be powered parasitically from a
digital input or from an external power supply.
Pin
CC
above the voltage upper threshold (V > V
), the sta-
INTHU
IN
tus LED is ON. When the input voltage is below the input
lower threshold (V < V ), the status LED is OFF.
To power the device parastically, connect V
to GND.
IN
INTHL
CC
In this configuration, power is derived from the signal on
the IN pin.
Layout Considerations
Place the 40.2kΩ (±1%) REXT resistor as close to the pin as
possible. Too much distance between the resistor and the IC
can create unwanted input current overshoots/undershoots.
To power the device from a local power supply, connect
V
CC
to a source between 3.0V and 5.5V. When VCC
is powered, the output (OUT) changes from a current
source to a CMOS output and the propagation delay from
IN to OUT is reduced.
EMI Protection
The MAX22191 must be protected against surge and ESD.
Connect a bidirectional TVS between IN and GND that
limits the the peak absolute input voltage to under 60V.
Example TVS’ are SMAJ33A, SPT02-236, PDFN3-32.
Connecting a Status/Indicator LED
The MAX22191 output (OUT) is capable of driving an
external status/indicator LED, as required in the IEC
V
DD
PROXIMITY
SENSOR/
SWITCH
OUT
IN
MAX22191
V
CC
R
EXT
24V
SMAJ33CA
TEST
GPI
GND
GND
Figure 2. Current Sinking Configuration with Status Indicator LED
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MAX22191
Ultra-Low-Power, Parasitically Powered
Digital Input
Typical Operating Circuits
24V CURRENT SINKING INPUT
V
DD
MAX22191
OUT
PROXIMITY
SENSOR/
SWITCH
IN
V
CC
2.3mA
R
EXT
24V
SMAJ33CA
TEST
40.2kΩ
INT
GPI
REF
GND
GND
24V CURRENT SOURCING INPUT
V
DD
MAX22191
OUT
IN
2.3mA
R
EXT
V
CC
24V
SMAJ33CA
TEST
40.2kΩ
INT
GPI
REF
GND
GND
PROXIMITY
SENSOR/
SWITCH
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MAX22191
Ultra-Low-Power, Parasitically Powered
Digital Input
Typical Operating Circuits (continued)
48V CURRENT SINKING INPUT
V
DD
1.5kΩ
MAX22191
PROXIMITY
OUT
1.2kΩ
MELF
IN
SENSOR/
SWITCH
V
CC
2.3mA
R
EXT
48V
TEST
SMAJ58CA
40.2kΩ
INT
GPI
REF
GND
GND
V
DD
REDUNDANT INPUT WITH TEST
SIGNALS AND CMOS OUTPUTS
V
CC
MAX22191
OUT
PROXIMITY
SENSOR/
SWITCH
GPI
IN
2.3mA
R
EXT
TEST
GPO
GPI
40.2kΩ
INT
REF
GND
GND
24V
V
DD
V
CC
MAX22191
OUT
IN
GPI
2.3mA
R
EXT
TEST
GPO
GPI
INT
REF
40.2kΩ
GND
GND
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MAX22191
Ultra-Low-Power, Parasitically Powered
Digital Input
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX22191AUT+
-40°C to +125°C
6 SOT23
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Chip Information
PROCESS: BiCMOS
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MAX22191
Ultra-Low-Power, Parasitically Powered
Digital Input
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
12/17
Initial release
—
Updated the General Description, Benefits and Features. Simplified Block Diagram,
DC Electrical Characteristics, and Typical Operating Circuits sections, and TOC03,
TOC07 and TOC08; added new TOC04 and renumbered subsequent TOCs in the
Typical Operating Characteristcs; added the Connecting a Status/Indicator LED and
EMI Protection sections, and new Figure 2
1‒2, 5‒6
8‒9
1
10/20
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Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
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