19-2561; Rev 2; 7/04
+5V Precision Voltage Reference
General Description
The MAX675 is a precision voltage reference that is
pretrimmed to within ±0.15% of 5V. The reference fea-
tures excellent temperature stability (as low as
12.0ppm/°C guaranteed), low current drain and low
noise. It is supplied in the space-saving narrow SO
package, as well as, the standard 8-pin Plastic DIP
package.
o
Pretrimmed to +5V, ±0.15%
o
Excellent Temperature Stability: 12ppm/°C
o
Low Noise: 10µV
P-P
o
Low Supply Current: 1.4mA (max)
o
Short-Circuit Protected
o
Load Regulation 0.001%/mA
o
Pin-for-Pin Compatible with REF02
Features
MAX675
Applications
A/D Converters
D/A Converters
Digital Voltmeters
Voltage Regulators
Threshold Detectors
MAX675CPA
MAX675CSA
MAX675EPA
MAX675ESA
PART
Ordering Information
INITIAL
PIN-
TEMPCO
TEMP RANGE
ERROR
PACKAGE (ppm/°C)
(mV)
0°C to +70°C 8 PDIP
0°C to +70°C
8 Narrow
SO
12
12
15
15
7
7
7
7
-40°C to +85°C 8 PDIP
-40°C to +85°C
8 Narrow
SO
Ordering Information continued at end of data sheet.
Pin Configurations
Typical Operating Circuit
15V
TOP VIEW
2
V
IN
N.C. 1
V
IN
2
TEMP
3
8
7
N.C.
N.C.
V
OUT
TRIM
V
OUT
6
OUTPUT
MAX675
6
5
3 TEMP
MAX675
GND 4
TRIM
GND
4
5
R
P
10kΩ
SO/DIP
REFERENCE WITH TRIMMED OUTPUT
Pin Configurations continued at end of data sheet.
________________________________________________________________
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 Precision Voltage Reference
MAX675
ABSOLUTE MAXIMUM RATINGS
Input Voltage .........................................................................40V
Power Dissipation
TO-99 (TV) (derate at 7.1mW/ C above +80°C)...........500mW
CERDIP (J) (derate at 6.7mW/ C above +75°C) ..........500mW
Plastic DIP (P) (derate at 5.6mW/ C above +36°C) .....500mW
Narrow SO (S) (derate at 5.0mW/ C above +55°C) .....300mW
Storage Temperature Range .............................-65°C to +150°C
Operating Temperature Range
MAX675C ............................................................0°C to +70°C
MAX675E .........................................................-40°C to +85°C
MAX675M ......................................................-55°C to +125°C
Dice Junction Temperature (T
J
) ........................-65°C to +150°C
Output Short-Circuit Duration
(to Ground or V
IN
)......................................................Indefinite
Lead Temperature (soldering, 60s) .................................+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
IN
= +15V, T
A
= +25°C, unless otherwise noted.)
PARAMETER
Output Voltage Tolerance
Output Voltage Temperature
Coefficient (Note 1)
Output Adjustment Range
Line Regulation (Note 2)
Load Regulation (Note 2)
Turn-On Settling Time
Quiescent Supply Current
Noise (Note 3)
Sink Current
Short-Circuit Current
Current Temperature Voltage
Output
t
ON
I
Q
e
N(P-P)
I
S
I
SC
V
T
V
OUT
= 0V
(Note 4)
TCV
O
V
TRIM
SYMBOL
I
L
= 0mA
MAX675CTV/CPA/CSA
MAX675ETV/EJA/EPA/ESA
MAX675MTV/MJA
Rp = 10
V
IN
= 18V to 33V
I
L
= 0 to 10mA
To ±0.1% of final value
No load
0.1Hz to 10Hz
0.3
±150
±300
0.006
0.001
5
750
10
0.5
30
630
1400
15
0.01
0.002
CONDITIONS
MIN
TYP
MAX
±7
12
15
20
mV
%/V
%/mA
µs
µA
µV
P-P
mA
mA
mV
ppm/°C
UNITS
mV
Note 1:
Temperature Coefficient is measured by the “box” method, i.e., the maximum
∆V
OUT
is divided by
∆T.
Note 2:
Line and Load Regulation specifications include the effect of self-heating.
Note 3:
Guaranteed by design for MAX675CPA, MAX675CSA, MAX675EPA, MAX675ESA; sample tested for all other grades and
packages.
Note 4:
Limit current in or out of pin 3 to 50nA and capacitance on pin 3 to 30pF.
2
_______________________________________________________________________________________
+5V Precision Voltage Reference
MAX675
Output Adjustment
The MAX675 trim terminal can be used to adjust the out-
put voltage over a 5V ±150mV range. This feature allows
system errors to be trimmed by setting the reference to a
voltage other than 5V such as 5.120V for binary applica-
tions (see
Typical Operating Circuit).
The trim terminal
may, of course, be left open if no adjustment is needed.
Adjustment of the output does not significantly affect the
temperature performance of the device. The temperature
coefficient change is approximately 0.7ppm/°C for each
100mV of output adjustment from its initial value.
880
830
TEMP VOLTAGE OUTPUT (mV)
780
730
680
630
580
530
480
430
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
Temperature Voltage Output
The MAX675 provides a temperature-dependent output
voltage on the TEMP pin. This voltage is proportional to
the absolute temperature, and has a scale factor of
approximately 2.1mV/°C (Figure 2).
Output Voltage = 2.1(T + 273)mV
where T = Temperature in °C
Figure 2. MAX675 Temperature Voltage Output vs.
Temperature
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
LINE REGULATION
vs. FREQUENCY
MAX675 toc01
MAX675 OUTPUT WIDEBAND
NOISE vs. BANDWIDTH (0.1Hz
TO FREQUENCY INDICATED)
V
IN
= 15V
T
A
= +25°C
MAX675 toc02
MAXIMUM LOAD CURRENT
vs. INPUT VOLTAGE
SHORT-CIRCUIT PROTECTION
MAX675 toc03
76
66
LINE REGULATION (dB)
56
46
36
26
16
6
10
100
1k
10k
100k
10,000
35
MAXIMUM LOAD CURRENT (mA)
30
25
20
15
10
5
OUTPUT NOISE (µV
P-P
)
1000
500mW MAXIMUM
DISSIPATION
100
T
A
= +25°C
10
1M
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
0
5
10
15
INPUT VOLTAGE (V)
20
25
_______________________________________________________________________________________
3
+5V Precision Voltage Reference
MAX675
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
MAXIMUM LOAD CURRENT
vs. TEMPERATURE
MAX675 toc04
OUTPUT CHANGE DUE TO
THERMAL SHOCK
PERCENT CHANGE IN OUTPUT VOLTAGE (%)
V
IN
= 15V
0.030
0.025
0.020
0.015
0.010
0.005
0
DEVICE IMMERSED
IN +75°C OIL BATH
-10
0
10
20
30
40
50
60
T
A
= T
A
=
+25°C +75°C
MAX675 toc05
30
V
IN
= 15V
MAXIMUM LOAD CURRENT (mA)
25
20
15
10
5
0
-60 -40 -20 0
0.035
20 40 60 80 100 120 140
TEMPERATURE (°C)
TIME (s)
Typical Applications
1.1mA
2
3 TEMP
V
IN
V
OUT
6
+
15V
2
V
IN
V
OUT
6
+5V
10kΩ
MAX675
TRIM
GND
4
9V
-
5
100kΩ
5.000V
MAX675
3
TEMP
TRIM
GND
4
5kΩ
5
2
3
10kΩ
+15V
6
4
-15V
-5V
MAX400
Figure 4. ±5V Reference
Figure 3. Precision Calibration Standard
4
_______________________________________________________________________________________
+5V Precision Voltage Reference
MAX675
+15V
15V
2
V
IN
V
OUT
6
2
V
IN
V
OUT
6
V
REF
9.09kΩ
5.11kΩ
TRIM
5
1.5kΩ
±5%
50kΩ
1.5kΩ
2
-
+
7
6
4
MAX675
3 TEMP
GND
4
I
OUT
VOLTAGE COMPLIANCE -25V TO +8V
TRIM
5
R
5.0V
I
OUT
=
+ 1mA
R
MAX675
TEMP
GND
4
3
V
OUT
(10mV/°C)
3
*
MAX400
200kΩ
-15V
*UP TO 10 FEET OF SHIELDED
4-CONDUCTOR CABLE.
Figure 5. Current Source
Figure 6. Precision Temperature Transducer with Remote
Sensor
Chip Topography
V
IN
2
6
V
OUT
Pin Configurations (continued)
TOP VIEW
N.C.
N.C.
8
1
7
N.C.
0.57”
1.45mm
V
IN
2
MAX675
3
4
GROUND
(CASE)
5
6 V
OUT
5
TRIM
TEMP
TRIM
3
TEMP
0.78”
1.98mm
4
GND
TO-99 METAL CAN
Ordering Information
PART
MAX675CTV*
INITIAL
PIN-
TEMPCO
ERROR
TEMP RANGE
PACKAGE (ppm/°C)
(mV)
0°C to +70°C 8 TO-99
12
15
15
20
20
7
7
7
7
7
N.C. 1
V
IN
2
TEMP
3
8
7
N.C.
N.C.
V
OUT
TRIM
MAX675
6
5
GND 4
MAX675ETV* -40°C to +85°C 8 TO-99
MAX675EJA* -40°C to +85°C 8 CERDIP
MAX675MTV* -55°C to +125°C 8 TO-99
MAX675MJA* -55°C to +125°C 8 CERDIP
CERDIP
*Contact
factory for availability. Not recommended for new designs.
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________
5
© 2004 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
