MAX44241/MAX44243/MAX44246
36V, Low-Noise, Precision,
Single/Quad/Dual Op Amps
19-6375; Rev 7; 4/15
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to www.maximintegrated.com/MAX44241.related.
Typical Operating Circuit
µMAX is a registered trademark of Maxim Integrated Products, Inc.
EVALUATION KIT AVAILABLE
General Description
The MAX44241/MAX44243/MAX44246 are 36V, ultra-
precision, low-noise, low-drift, single/quad/dual opera-
tional amplifiers that offer near-zero DC offset and drift
through the use of patented chopper stabilized and
auto-zeroing techniques. This method constantly mea-
sures and compensates the input offset, eliminating drift
over time and temperature and the effect of 1/f noise.
These single/quad/dual devices feature rail-to-rail out-
puts, operate from a single 2.7V to 36V supply or dual
±1.35V to ±18V supplies, and consume only 0.42mA per
channel, with only 9nV/√Hz input-referred voltage noise.
The ICs are available in 8-pin FMAXM or SO packages
and are rated over the -40NC to +125NC temperature
range.
Applications
Benefits and Features
S Reduces Noise-Sensitive Precision Applications
• Low 9nV/√Hz Noise at 1kHz
• Integrated EMI Filter
S Eliminates Cost of Calibration with Increased
Accuracy and Patented Auto-Zero Circuitry
• Ultra-Low Input V
OS
: 5µV (max)
• Low 20nV/°C (max) of Offset Drift
S Suitable for High-Bandwidth Applications
• 1µs Fast Settling Time
• 5MHz Gain-Bandwidth Product
S Low 0.55mA Per Channel (max) Quiescent Current
S Wide Supply for High-Voltage Front-Ends
• 2.7V to 36V Supply Range
S Rail-to-Rail Output
Battery-Powered
Equipment
PLC Analog I/O
Modules
Transducer Amplifiers
Load Cell Amplifiers
Precision
Instrumentation
15V
15V
15V
3.3V
3V
V
DD
MICRO-
PROCESSOR
V
OUT
50R
G
50R
G
R
G
V
REF
V
DD
V
SS
V
IN-
V
IN+
C
1
BUFFER
BUFFER
½ MAX44246
½ MAX44246
MAX11211
MAX6126
R
R
15V
1.5V
BUFFER
R
R
R
1
OUTPUT
½ MAX44246
-15V
-15V
-15V
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
2Maxim Integrated
MAX44241/MAX44243/MAX44246
36V, Low-Noise, Precision,
Single/Quad/Dual Op Amps
Supply Voltage (V
DD
to GND) .............................-0.3V to +40V
All Other Pins ................................(GND - 0.3V) to (V
DD
+ 0.3V)
Short-Circuit Duration, OUTA,
OUTB to Either Supply Rail………………………… ............. 1s
Continuous Input Current (Any Pin) ..................................20mA
Differential Input Current ................................................. Q20mA
Differential Input Voltage (Note 1) ....................................... .Q6V
Continuous Power Dissipation (T
A
= +70NC)
5-Pin SOT23 (derate 3.9mW/NC above +70NC).......312.6mW
8-Pin FMAX (derate 4.8mW/NC above +70NC) ........387.8mW
8-Pin SO (derate 7.60mW/NC above +70NC)...........606.1mW
14-Pin SO (derate 12.30mW/NC above +70NC).......987.7mW
14-Pin TSSOP (derate 10mW/NC above +70NC) .....796.8mW
Operating Temperature Range ........................ -40NC to +125NC
Junction Temperature ....................................................+150NC
Storage Temperature Range ............................ -65NC to +150NC
Lead Temperature (soldering,10s) .................................+300NC
Soldering Temperature (reflow) ......................................+260NC
ABSOLUTE MAXIMUM RATINGS
Note 2: 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.
Note 1: The amplifier inputs are connected by internal back-to-back clamp diodes. In order to minimize noise in the input stage,
current-limiting resistors are not used. If differential input voltages exceeding ±1V are applied, limit input current to 20mA.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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.
µMAX
Junction-to-Ambient Thermal Resistance (q
JA
) .....206.3NC/W
Junction-to-Case Thermal Resistance (q
JC
)
..............42NC/W
SO-8
Junction-to-Ambient Thermal Resistance (q
JA
) ........132NC/W
Junction-to-Case Thermal Resistance (q
JC
)
..............38NC/W
SO-14
Junction-to-Ambient Thermal Resistance (q
JA
) ..........81NC/W
Junction-to-Case Thermal Resistance (q
JC
)
..............32NC/W
SOT23
Junction-to-Ambient Thermal Resistance (q
JA
) .....255.9NC/W
Junction-to-Case Thermal Resistance (q
JC
)
..............81NC/W
TSSOP
Junction-to-Ambient Thermal Resistance (q
JA
) .....100.4NC/W
Junction-to-Case Thermal Resistance (q
JC
)
..............30NC/W
PACKAGE THERMAL CHARACTERISTICS (Note 2)
ELECTRICAL CHARACTERISTICS
(V
DD
= 30V, V
GND
= 0V, V
IN+
= V
IN-
= V
DD
/2, R
L
= 5kΩ to V
DD
/2, T
A
= -40°C to +125°C, unless otherwise noted. Typical values at
T
A
= +25°C.) (Note 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range
V
DD Guaranteed by PSRR 2.7 36
V
Power-Supply Rejection Ratio
(Note 4)
PSRR
V
DD
= 2.7V to 36V, T
A
=
+25NC
148 166
dB
V
DD
= 2.7V to 36V, -40NC < T
A
< +125NC 146
Quiescent Current per
Amplifier
I
DD R
L
= J
T
A
=
+25NC
0.42 0.55
mA
-40NC < T
A
<
+125N
C
0.60
Power-Up Time
t
ON 20 Fs
DC SPECIFICATIONS
Input Common-Mode Range
V
CM Guaranteed by
CMRR
test
(V
GND
- 0.05)
(V
DD
- 1.5)
V
Common-Mode Rejection Ratio
(Note 4)
CMRR V
CM
= (V
GND
- 0.05V) to (V
DD
- 1.5V) 146 166
dB
Input Offset Voltage (Note 4)
V
OS
1 5 F
V