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MAX6662MSA+

P1-P3P4-P6P7-P9
General Description
The MAX6662 is a 12-bit + sign temperature sensor
combined with a programmable overtemperature alarm
and a 3-wire (SPI™-compatible) serial interface in a sin-
gle package. It converts its die temperature into digital
values using an internal analog-to-digital converter
(ADC). The temperature data is stored in a temperature
register as a 13-bit word, which allows 0.0625°C resolu-
tion. The temperature data is readable at any time
through the serial interface. The operating temperature
range is -55°C to +150°C.
The MAX6662 provides two programmable watchdog
interrupt outputs. ALERT is used for lower temperature
warning functions, while OT is used for higher tempera-
ture-critical functions, such as power-supply shutdown.
The MAX6662 features a shutdown mode that saves
power by disabling everything except the serial inter-
face. The temperature sensor is available in an 8-pin SO
package.
Applications
HVAC
Refrigeration
Automotive
Test Equipment
Features
♦ 12-Bit + Sign, 0.0625°C Resolution
♦ Accuracy
±1°C max (+30°C to +50°C)
±1.6°C max (0°C to +70°C)
±2.5°C max (-20°C to +85°C)
±2.5 typ (+150°C)
♦ Extended Temperature Measurement Range
-55°C to +150°C
♦ Low Average Supply Current, 125μA (typ)
♦ Shutdown Mode to Minimize Power Consumption
in Portable Applications
♦ Two Programmable Temperature Fault Outputs
♦ Switchable Fault Queue to Eliminate False
Tripping in Noisy Environments
MAX6662
12-Bit + Sign Temperature Sensor with
SPI-Compatible Serial Interface
________________________________________________________________
Maxim Integrated Products
1
ALERT
OTGND
1
2
8
7
V
CC
NCCS
SIO
SCLK
SO
TOP VIEW
3
4
6
5
MAX6662
Pin Configuration
Ordering Information
10kΩ
10kΩ
0.1μF
V
CC
OT
ALERT
SIO
SCLK
CS
SYSTEM
CONTROLLER
V
CC
= +3V TO +5.5V
HEAT
SOURCES
MAX6662
Typical Operating Circuit
19-2121; Rev 0; 7/01
EVALUATION KIT
AVAILABLE
PART TEMP. RANGE PIN-PACKAGE
MAX6662MSA -55°C to +150°C 8 SO
SPI is a trademark of Motorola, Inc.
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.
MAX6662
12-Bit + Sign Temperature Sensor with
SPI-Compatible Serial Interface
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +3V to +5.5V, T
A
= -55°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C and V
CC
= +3.3V.)
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.
All Voltages Are Referenced to GND
V
CC
...........................................................................-0.3V to +6V
ALERT, OT................................................................-0.3V to +6V
SIO, SCLK, CS............................................-0.3V to (V
CC
+ 0.3V)
SIO Current .......................................................-10mA to +50mA
Continuous Current into Any Pin (except NC)….................10mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SO (derate 5.9mW/°C above +70°C)..................471mW
Operating Temperature Range (Note 1) ..........-55°C to +150°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: The MAX6662 is not recommended to operate above +125°C for an extended period of time.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
TEMPERATURE TO DIGITAL-CONVERTER CHARACTERISTICS
+30°C ≤ T
A
≤ +50°C, V
CC
= +3.3V -1.0 ±0.4 +1.0
0°C ≤ T
A
≤ +70°C, V
CC
= +3.3V -1.6 ±0.7 +1.6
-20°C ≤ T
A
≤ +85°C, V
CC
= +3.3V -2.5 ±1.0 +2.5
-40°C ≤ T
A
≤ +100°C, V
CC
= +3.3V -3.0 ±1.2 +3.0
-55°C ≤ T
A
≤ +125°C, V
CC
= +3.3V -4.0 ±1.5 +4.0
Accuracy
T
A
≤ +150°C, V
CC
= +3.3V ±2.5
°C
Power-Supply Rejection Ratio PSRR 0.2 0.5 °C/V
Resolution 0.0625 °C
Supply Voltage Range V
CC
3.0 5.5 V
V
CC
= +5.5V 150
Average Operating Current
V
CC
= +3.0V 125
µA
V
CC
= +5.5V 300 600
Peak Operating Current (Note 2)
V
CC
= +3.0V 300 500
µA
V
CC
= +5.5V 8 22
Shutdown Supply Current
V
CC
= +3.0V 4 15
µA
Power-On-Reset Threshold V
POR
2.0 2.5 V
Power-On-Reset Threshold
Hysteresis
90 mV
Conversion Time t
CONV
0.25 s
Temperature Update Frequency 2Hz
SERIAL INTERFACE (SIO, SCLK, CS, ALERT, OT)
Input Low Voltage V
IL
0.8 V
Input High Voltage V
IH
0.7 V
CC
V
Input/Output Leakage Current I
LEAK
V
IN
= GND or V
CC
-5 +5 µA
Input Capacitance C
in
5pF
Output Low Sink Current I
OL
ALERT, OT, V
OL
= 0.6V 3 mA
Output High Voltage V
OH
I
SIO
= 1.6mA source V
C C
- 0.4 V
Output Low Voltage V
OL
I
SIO
= 1.6mA sink 0.4 V
MAX6662
12-Bit + Sign Temperature Sensor with
SPI-Compatible Serial Interface
_______________________________________________________________________________________
3
-3
0
-1
-2
1
2
3
-50 3010-30 -10 50 70 90 110 130 150
TEMPERATURE ERROR
VS. TEMPERATURE
MAX6662 toc01
TEMPERATURE (°C)
TEMPERATURE ERROR (°C)
V
CC
= +5.0V
V
CC
= +3.3V
V
CC
= +3.0V
0
20
10
40
30
50
60
80
70
90
-0.45-0.35 -0.25-0.15 0.05 0.15 0.25 0.35 0.45
TEMPERATURE ERROR DISTRIBTUTION
MAX6662 toc02
TEMPERATURE ERROR (°C)
PERCENTAGE OF SAMPLES (%)
NOTE: DEVICES
TRIMMED AT
T
A
= +30°C
200 SAMPLES
T
A
= +30°C
100
120
160
140
180
200
SUPPLY CURRENT VS. TEMPERATURE
MAX6662 toc03
TEMPERATURE (°C)
SUPPLY CURRENT (μA)
-50 500 100 150
V
CC
= +5.0V
AVERAGE OVER 2
V
CC
= +3.3V
V
CC
= +3.0V
Typical Operating Characteristics
(V
CC
= +3V, T
A
= +25°C, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3V to +5.5V, T
A
= -55°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C and V
CC
= +3.3V.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SERIAL INTERFACE TIMING
Serial Clock Frequency f
SCLK
2.5 MHz
SCLK High Pulse Width t
CH
200 ns
SCLK Low Pulse Width t
CL
200 ns
CS High Pulse Width t
CSW
200 ns
SCLK Fall to Output Data Valid t
DO
C
LOAD
= 100pF 100 ns
CS Fall to SCLK Rise t
CSS
100 ns
CS Rise to Output Disable t
TR
C
LOAD
= 100pF 100 ns
CS to SCLK Hold Time t
CSH
0ns
SIO to SCLK Setup Time t
DS
100 ns
SIO to SCLK Hold Time t
DH
0ns
Output Fall Time t
F
10 ns
Note 2: Peak operating current measured during conversion.
P1-P3P4-P6P7-P9

MAX6662MSA+

Mfr. #:
Buy MAX6662MSA+
Manufacturer:
Maxim Integrated
Description:
Board Mount Temperature Sensors 12-Bit + Sign Temperature Sensor
Lifecycle:
New from this manufacturer.
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