Rainbow Electronics MAX6612 User Manual
General Description
The MAX6612 is a low-power precision analog output
temperature sensor in a tiny 5-pin SC70 package. The
sensitivity of the output voltage to temperature is a high
19.53mV/°C. This sensitivity provides superior noise
immunity. The voltage/temperature slope is chosen to
provide convenient bit weights when the MAX6612 drives the input of an ADC with a 2.5V or 5V reference.
The MAX6612 provides an analog voltage output proportional to temperature. Accuracy is ±1.2°C (max) at +25°C,
±3.0 (max) from TA= 0°C to +70°C, and ±5.5°C (max)
from TA= -10°C to +125°C. Useful measurements can be
obtained at temperatures as high as +150°C. Self-heating
effects are negligible due to the low current consumption
of the part.
Unlike many analog temperature sensors, the MAX6612
is stable with large capacitive loads. Any capacitive
load greater than or equal to 1000pF yields stable operation, providing broad flexibility in board-level design.
The operating temperature range varies with the supply
voltage, with a higher supply voltage enabling a wider
temperature range. The MAX6612 can be used over a
range of -10°C to +125°C with a supply voltage of 3.3V
or greater. For applications with a supply voltage of
2.4V, the MAX6612 can be used over a temperature
range of -10°C to +70°C.
Applications
Base Stations
Industrial Equipment
Home Appliances
Battery Packs
Medical Instruments
Portable Equipment
GPS Equipment
Features
♦ Optimized for Use with ADCs
♦ High Temperature-to-Voltage Slope
♦ Able to Drive High-Capacitive Loads
♦ Operates Up to +150°C
♦ Low Current Consumption (35µA max)
♦ No Calibration Required
♦ Space-Saving SC70 Package
MAX6612
High-Slope, Low-Power, Analog Temperature
Sensor in an SC70 Package
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
MAX6612 MAX1137
V
CC
V
SUPPLY
V
DD
GND GND
OUT AIN_
C
S
C
LOAD
C
REF
SDA
SCL
R
PU1
R
PU2
Typical Application Circuit
19-2546; Rev 0; 7/02
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.
Pin Configuration
PART TEMP RANGE
MAX6612MXK-T -55°C to +150°C 5 SC70-5 ADG
PINPACKAGE
TOP
MARK
TOP VIEW
15BA
MAX6612
2
GND
OUT
34
SC70
V
CC
OUTPUT VOLTAGE vs. AMBIENT TEMPERATURE
MAX6612 toc01
AMBIENT TEMPERATURE (°C)
OUTPUT VOLTAGE (mV)
1251007550250
500
1000
1500
2000
2500
3000
3500
0
-25 150
VCC = 5.5V
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX6612 toc02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
5432
5
10
15
20
25
0
16
TA = +25°C
Typical Operating Characteristics
(VCC= 3.3V, CS= 0.1µF, C
LOAD
= 1000pF, unless otherwise specified.)
MAX6612
High-Slope, Low-Power, Analog Temperature
Sensor in an SC70 Package
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC= 2.4V to 5.5V, C
LOAD
= 1000pF, TA= -10°C to +150°C, unless otherwise specified.)
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.
Note 1: 100% production tested at +25°C. Guaranteed by design through temperature.
Note 2: T is in °C.
Note 3: Guaranteed by design.
V
CC
to GND..............................................................-0.3V to +6V
OUT to GND..................................................-0.3V to V
CC
+ 0.3V
ESD Protection (Human Body)...........................................2000V
Current into Any Pin ............................................................20mA
Output Short-Circuit Duration.....................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SC70 (derate 3.1mW/°C above +70°C)..............245mW
Operating Temperature Range .........................-55°C to +150°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +165°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Temperature Error
V
= 0.4 + (0.01953 ✕ T) –
OUT
✕
10-6 ✕ T2)
(2
(Notes 1, 2)
Supply Voltage Range V
Supply Current I
Output Voltage V
Sensor Gain (Average Slope) TA = -10°C to +150°C 19.53 mV/°C
Capacitive Load No sustained oscillations (Note 3) 1000 pF
Turn-On Time C
Shutdown Current VCC < 0.8V 1 µA
Supply Sensitivity VCC = 2.4V to 5.5V 0.5 0.8 °C/V
Load Regulation I
TA = +25°C, VCC = 3.3V -1.2 +1.2
TA = +60°C to +70°C, VCC = 3.3V -3.0 +3.0
TA = +60°C to +100°C, VCC = 3.3V -4.3 +4.3
TA = -10°C to +125°C, VCC = 3.3V -5.5 +5.5
T
= -10°C to +150°C, VCC = 5.5V ±5
A
CC
No load 35 µA
Q
OUT
TA = 0°C 400 mV
= 1000pF 80 µs
LOAD
= 2µA to 100µA 0.03 °C/µA
OUT
2.4 2.3 5.5 V
°C
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