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19-0169; Rev 1; 11/05
±5V, ±12V (±15V) Dedicated
Microprocessor Voltage Monitors
_______________General Description
The MAX8215 contains five voltage comparators; four
are for monitoring +5V, -5V, +12V, and -12V, and the
fifth monitors any desired voltage. The MAX8216 is
identical, except it monitors ±15V supplies instead of
±12V. The resistors required to monitor these voltages
and provide comparator hysteresis are included on-
chip. All comparators have open-drain outputs. These
devices consume 250µA max supply current over tem-
perature.
____________________________Features
♦
4 Dedicated Comparators plus 1 Auxiliary
Comparator
♦
5V Dedicated Comparator Has ±1.25% Accuracy
♦
-5V, +12V, -12V, +15V, -15V Dedicated
Comparators Have ±1.5% Accuracy
♦
Overvoltage/Undervoltage Detection or
Programmable Delay Using Auxiliary Comparator
♦
Internal 1.24V Reference with ±1% Initial Accuracy
♦
Wide Supply Range: 2.7V to 11V
♦
Built-In Hysteresis
♦
250µA Max Supply Current Over Temp.
♦
Independent Open-Drain Outputs
♦
All Precision Components Included
MAX8215/MAX8216
________________________Applications
Microprocessor Voltage Monitor
+5V, -5V, +12V, -12V Supply Monitoring (MAX8215)
+5V, -5V, +15V, -15V Supply Monitoring (MAX8216)
Overvoltage/Undervoltage Detection with
Uncommitted Comparator
Industrial Controllers
Mobile Radios
Portable Instruments
Industrial Equipment
Data-Acquisition Systems
______________Ordering Information
PART
MAX8215CPD
MAX8215CSD
MAX8215C/D
MAX8215EPD
MAX8215ESD
MAX8215EJD
MAX8215MPD
MAX8215MJD
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
-55°C to +125°C
PIN-PACKAGE
14 Plastic DIP
14 SO
Dice*
14 Plastic DIP
14 SO
14 CERDIP
14 Plastic DIP
14 CERDIP
__________Typical Operating Circuit
0.1µF
GND PGND
+5V
V
DD
OUT1
+5V
-5V
MAX8215
MAX8216
OUT2
*Dice
are tested at T
A
= +25°C.
Devices in PDIP and SO packages are available in both leaded
and lead-free packaging. Specify lead free by adding the +
symbol at the end of the part number when ordering. Lead free
not available for CERDIP package.
Ordering Information continued on last page.
__________________Pin Configuration
+12V (+15V)
TOP VIEW
OUT3
VREF
1
2
14
V
DD
13
OUT1
-12V (-15V)
OUT4
GND
+5V
3
-5V
4
+12V (+15V)
-12V (-15V)
5
6
MAX8215
MAX8216
12
OUT2
11
OUT3
10
OUT4
9
8
DOUT
PGND
DIN
DOUT
DIN
7
DIP/SO
( ) ARE FOR
MAX8216 ONLY.
1.24V REFERENCE
VREF
( ) ARE FOR MAX8216 ONLY.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
±5V, ±12V (±15V) Dedicated
Microprocessor Voltage Monitors
MAX8215/MAX8216
ABSOLUTE MAXIMUM RATINGS
V
DD
............................................................................-0.3V, +12V
VREF..............................................................-0.3V, (V
DD
+ 0.3V)
OUT_, DOUT Outputs....................................-0.3V, (V
DD
+ 0.3V)
+5V Input...................................................................+20V, -0.3V
-5V, +12V, +15V, -12V, -15V Inputs.....................................±50V
DIN Input .......................................................(V
DD
+ 0.3V), -0.3V
Continuous Power Dissipation (T
A
= +70°C)
Plastic DIP (derate 10.00mW/°C above +70°C) ...........800mW
SO (derate 8.33mW/°C above +70°C) ..........................667mW
CERDIP (derate 9.09mW/°C above +70°C) ..................727mW
Operating Temperature Ranges:
MAX821_C_ _ ......................................................0°C to +70°C
MAX821_E_ _....................................................-40°C to +85°C
MAX821_M_ _ .................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +165°C
Lead Temperature (soldering, 10sec) .............................+300°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
(V
DD
= +5V, GND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
POWER SUPPLY
V
DD
Supply Voltage Range
I
DD
Supply Current
REFERENCE OUTPUT
T
A
= +25°C
Output Voltage Tolerance
Referred to 1.24V
Load Current
Load Regulation
Line Regulation
Output Tempco
COMPARATOR INPUTS
V
IN
decreasing, T
A
= +25°C
MAX821_C
+5V Trip Level
T
A
= T
MIN
to T
MAX
V
IN
increasing
T
A
= +25°C
+5V Trip Level Hysteresis
T
A
= +125°C
T
A
= -55°C
V
IN
decreasing (MAX8215 only), T
A
= +25°C
+12V Trip Level
MAX821_C
T
A
= T
MIN
to T
MAX
MAX821_E
MAX821_M
V
IN
decreasing (MAX8216 only), T
A
= +25°C
+15V Trip Level
MAX821_C
T
A
= T
MIN
to T
MAX
MAX821_E
MAX821_M
2
10.431
10.404
10.378
10.325
13.036
13.003
12.970
12.904
13.235
MAX821_E
MAX821_M
4.521
4.500
4.500
4.464
4.636
1.25
1.75
0.8
10.590
10.749
10.775
10.802
10.855
13.434
13.467
13.500
13.566
V
V
%
4.579
4.636
4.657
4.657
4.693
4.749
V
3.3
0.01
15
MAX821_C
T
A
= T
MIN
to T
MAX
MAX821_E
MAX821_M
-1.00
-1.5
-1.75
-2.5
1.00
1.5
1.75
2.5
40
µA
µV/µA
%/V
ppm/°C
%
CONDITIONS
MAX821_C
MAX821_E/M
MIN
2.7
2.85
137
TYP
MAX
11
11
250
UNITS
V
µA
_______________________________________________________________________________________
±5V, ±12V (±15V) Dedicated
Microprocessor Voltage Monitors
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +5V, GND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
CONDITIONS
I V
IN
I decreasing, T
A
= +25°C
MAX821_C
MAX821_E
T
A
= T
MIN
to T
MAX
MAX821_M
I V
IN
I decreasing (MAX8216 only), T
A
= +25°C
-15V Trip Level
MAX821_C
T
A
= T
MIN
to T
MAX
MAX821_E
MAX821_M
I V
IN
I decreasing, T
A
= +25°C
MAX821_C
T
A
= T
MIN
to T
MAX
MAX821_E
MAX821_M
+15V trip level
+12V trip level
Threshold Hysteresis
T
A
= +25°C
-15V trip level
-12V trip level
-5V trip level
Hysteresis Tempco, ±15, ±12, -5
+5V input to GND
+12V/+15V input to GND
-5V input to REF
-12V/-15V input to REF
AUXILIARY COMPARATOR INPUT
V
IN
decreasing, T
A
= +25°C
MAX821_C
MAX821_E
MAX821_M
T
A
= +25°C
T
A
= +25°C
V
OL
; V
DD
= 5V, I
SINK
= 2mA
Voltage Output Low
Leakage Current
Comparator Response Time
(All Comparators)
V
DD
= 1.5V, I
SINK
= 0.2mA
V
DD
= 1.0V, I
SINK
= 0.1mA
Off State
30mV overdrive (Note 1)
20
V
THR
MAX8215/MAX8216
MIN
TYP
MAX
UNITS
-12V Trip Level
-10.431 -10.590 -10.749
-10.404
-10.776
-10.378
-10.802
-10.325
-13.003
-12.970
-12.904
-4.348
-4.337
-4.326
-4.304
1.25
1.25
1.50
1.50
1.60
0.005
130
168
160
190
-1.5
-1.75
-2.00
-2.50
0
1.5
1.75
2.00
2.50
2.00
10
0.3
0.3
1.0
-4.415
-10.855
-13.467
-13.500
-13.566
-4.482
-4.493
-4.500
-4.525
2.00
2.00
2.25
2.25
2.25
-13.036 -13.235 -13.434
V
V
-5V Trip Level
V
%
%/°C
Input Resistance
T
A
= +25°C
kΩ
Trip Level with Respect to 1.24V
%
Threshold Hysteresis
Input Bias Current
1.25
2
0.11
0.04
0.10
%
nA
V
µA
µs
Note 1:
To overdrive the +5V/+12V/+15V comparators with a 30mV overdrive voltage, use the formula 30mV
(
1.24
)
to determine the required input voltage. V
THR
is the threshold of the particular overdriven comparator. To overdrive the
-5V/-12V/-15V comparators use 30mV
[
1+
I
V
THR
I ]
.
1.24
_______________________________________________________________________________________
3
±5V, ±12V (±15V) Dedicated
Microprocessor Voltage Monitors
MAX8215/MAX8216
__________________________________________Typical Operating Characteristics
(T
A
=+25°C, unless otherwise noted.)
COMPARATOR INPUT BIAS CURRENT
vs. TEMPERATURE
MAX8215-TOC1
COMPARATOR INPUT BIAS CURRENT
vs. SUPPLY VOLTAGE
MAX8215-TOC2
OUTPUT VOLTAGE LOW
vs. OUTPUT SINK CURRENT
30
OUTPUT SINK CURRENT (mA)
25
20
10
1.5
5
0.5
0
T
A
= +125°C
T
A
= -55°C
T
A
= +25°C
MAX8215-TOC3
4
3.5
INPUT BIAS CURRENT (nA)
3
2.5
2
1.5
1
0.5
0
-60 -40 -20 0
V
DD
= 5V
1.6
1.4
INPUT BIAS CUREENT (nA)
1.2
1
0.8
0.6
0.4
0.2
0
T
A
= +25°C
35
20 40 60 80 100 120 140
2
2.5
3
3.5
4
4.5
5
0 2.0 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
VOL (V)
TEMPERATURE (C°)
SUPPLY VOLTAGE (V)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX8215-TOC4
REFERENCE VOLTAGE
vs. REFERENCE SOURCE CURRENT
MAX8215-TOC5
REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
T
A
= -55°C
MAX8215-TOC6
155
150
SUPPLY CURRENT (µA)
145
140
T
A
= +125°C
135
130
125
2
3
4
5
6
7
-5V PIN = -5V
-12V PIN = -5V
+5V PIN = +5V
+12V PIN = +12V
8
9
T
A
= +25°C
T
A
= -55°C
1.238
VREF,REFERENCE VOLTAGE (V)
1.237
1.236
T
A
= +25°C
1.235
1.234
1.233
1.232
1.231
1.23
0
50
100
150
200
250
V
DD
= 5V
T
A
= +125°C
1.25
VREF, REFERENCE VOLTAGE (V)
1.2
1.15
1.1
1.05
1
0.95
NOTE: -55°C IS WORST CASE
CONDITION FOR REFERENCE
REGULATION AT LOW VOLTAGES.
1
2
3
5 6 7 8 9
SUPPLY VOLTAGE (V)
4
T
A
= -55°C
10 11 12
300
10 11
SUPPLY VOLTAGE (V)
REFERENCE SOURCE CURRENT (µA)
VREF OUTPUT VOLTAGE
vs. TEMPERATURE
MAX8215-TOC7
1.238
VREF, REFERENCE VOLTAGE (V)
1.237
V
DD
= 5V
1.236
1.235
1.234
1.233
1.232
-55 -35 -15
5
25
45
65 85 105 125
TEMPERATURE (°C)
4
_______________________________________________________________________________________
微控制器 MCU
