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MAX44241 Schematic ( PDF Datasheet ) - Maxim Integrated

Teilenummer MAX44241
Beschreibung Single/Quad/Dual Op Amps
Hersteller Maxim Integrated
Logo Maxim Integrated Logo 




Gesamt 13 Seiten
MAX44241 Datasheet, Funktion
EVALUATION KIT AVAILABLE
MAX44241/MAX44243/MAX44246
36V, Low-Noise, Precision,
Single/Quad/Dual Op Amps
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
Transducer Amplifiers
Load Cell Amplifiers
Precision
Instrumentation
Battery-Powered
Equipment
PLC Analog I/O
Modules
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 VOS: 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
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.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit
15V 3.3V
½ MAX44246
BUFFER
R
15V
-15V
50RG R
15V
R1 3V VOUT
MAX6126
VDD
RG 50RG
BUFFER
R
VDD VREF
VIN+
MAX11211 OUTPUT
MICRO-
PROCESSOR
15V -15V
R ½ MAX44246
BUFFER
1.5V
½ MAX44246
VIN-
VSS
C1
-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.
19-6375; Rev 7; 4/15






MAX44241 Datasheet, Funktion
MAX44241/MAX44243/MAX44246
36V, Low-Noise, Precision,
Single/Quad/Dual Op Amps
Typical Operating Characteristics (continued)
(VDD = 10V, VGND = 0V, VIN+ = VIN- = VDD/2, RL = 5kΩ to VDD/2, TA = -40°C to +125°C, unless otherwise noted. Typical values are
at TA = +25°C.) (Note 3)
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
160
140 100mVP-P
POWER-SUPPLY REJECTION RATIO
vs. TEMPERATURE
180
170
OPEN-LOOP GAIN vs. FREQUENCY
200
VIN = 100mVP-P
120 160 150
100 150
80 140 100
60 130
40 120 50
20 110
0 100
0
-20 90
-40
0.1
500
1 10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
OUTPUT VOLTAGE LOW
vs. OUTPUT SINK CURRENT
80
-50
450
-25 0 25 50 75 100
TEMPERATURE (°C)
OUTPUT VOLTAGE HIGH
vs. OUTPUT SOURCE CURRENT
125
-50
0.01 0.1
70
1 10 100 1k 10k 100k 1M 10M100M
FREQUENCY (Hz)
OUTPUT VOLTAGE LOW
vs. TEMPERATURE
450 400 60
400 350
350 300 50
300 250 40
250
200 200 30
150 150 20
100 100
50 50 10
0
0
9.970
2468
OUTPUT SINK CURRENT (mA)
OUTPUT VOLTAGE HIGH
vs. TEMPERATURE
10
0
0 2 4 6 8 10
OUTPUT SOURCE CURRENT (mA)
SMALL-SIGNAL GAIN vs. FREQUENCY
2
0
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
LARGE-SIGNAL GAIN vs. FREQUENCY
5
9.965
9.960
0
-2 NORMALIZED GAIN,
-4 VIN = 100mVP-P
0
-5 NORMALIZED GAIN,
-10 VIN = 2VP-P
9.955
9.950
9.945
9.940
9.935
9.930
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
-6
-8
-10
-12
-14
-16
-18
-20
10 100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
-15
-20
-25
-30
-35
-40
-45
-50
10 100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
Maxim Integrated
  6

6 Page









MAX44241 pdf, datenblatt
MAX44241/MAX44243/MAX44246
36V, Low-Noise, Precision,
Single/Quad/Dual Op Amps
Layout Guidelines
The MAX44241/MAX44243/MAX44246 feature ultra-low
offset voltage and noise. Therefore, to get optimum per-
formance follow the following layout guidelines.
Avoid temperature gradients at the junction of two dis-
similar metals. The most common dissimilar metals used
on a PCB are solder-to-component lead and solder-to-
board trace. Dissimilar metals create a local thermo-
couple. A variation in temperature across the board can
cause an additional offset due to Seebeck effect at the
solder junctions. To minimize the Seebeck effect, place
the amplifier away from potential heat sources on the
board, if possible. Orient the resistors such that both
the ends are heated equally. It is a good practice to
match the input signal path to ensure that the type and
number of thermoelectric junctions remain the same. For
example, consider using dummy 0Ω resistors oriented
in such a way that the thermoelectric sources, due to
the real resistors in the signal path, are cancelled. It is
recommended to flood the PCB with ground plane. The
ground plane ensures that heat is distributed uniformly
reducing the potential offset voltage degradation due to
Seebeck effect.
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX44241AUA+ -40NC to +125NC 8 FMAX
MAX44241AUK+ -40NC to +125NC 5 SOT23
AFMQ
MAX44243ASD+ -40NC to +125NC 14 SO
MAX44243AUD+ -40NC to +125NC 14 TSSOP
MAX44246ASA+ -40NC to +125NC 8 SO
MAX44246AUA+ -40NC to +125NC 8 FMAX
+Denotes a lead(Pb)-free/RoHS-compliant package.
PROCESS: BiCMOS
Chip Information
Package Information
For the latest package outline information and land patterns (foot-
prints), go to www.maximintegrated.com/packages. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but the
drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
5 SOT23
8 SO
8 µMAX
14 SO
14 TSSOP
PACKAGE
CODE
U5+1
S8+4
U8+1
S14M+4
U14M+1
OUTLINE
NO.
21-0057
21-0041
21-0036
21-0041
21-0066
LAND
PATTERN NO.
90-0174
90-0096
90-0092
90-0112
90-0113
Maxim Integrated
  12

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