MAX44252 Maxim, MAX44252 Datasheet

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MAX44252

Manufacturer Part Number
MAX44252
Description
The MAX44251/MAX44252 are 20V, ultra-precision, low-noise, low-drift amplifiers that offer near-zero DC offset and drift through the use of patented autocorrelating zeroing techniques
Manufacturer
Maxim
Datasheet
The MAX44251/MAX44252 are 20V, ultra-precision, low-
noise, low-drift amplifiers that offer near-zero DC offset
and drift through the use of patented autocorrelating
zeroing techniques. This method constantly measures
and compensates the input offset, eliminating drift over
time and temperature and the effect of 1/f noise. These
dual and quad devices feature rail-to-rail outputs, oper-
ate from a single 2.7V to 20V supply, and consume only
1.15mA per channel, while providing 5.9nV/√Hz input-
referred voltage noise. The ICs are unity-gain stable with
a gain-bandwidth product of 10MHz.
With excellent specifications such as offset voltage of
6µV (max), drift of 19nV/°C (max), and 123nV
0.1Hz to 10Hz, the ICs are ideally suited for applications
requiring ultra-low noise and DC precision such as inter-
facing with pressure sensors, strain gauges, precision
weight scales, and medical instrumentation.
The ICs are available in 8-pin SOT23, 8-pin µMAX
and 14-pin SOIC packages and are rated over the
-40°C to +125°C temperature range.
Ordering Information
Functional Diagrams
For related parts and recommended products to use with this part,
refer to
µMAX is a registered trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
www.maxim-ic.com/MAX44251.related.
20V
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appear at end of data sheet.
appears at end of data sheet.
20V, Ultra-Precision, Low-Noise Op Amps
General Description
R
G
BUFFER
BUFFER
50R
50R
20V
20V
G
G
MAX44251
MAX44251
R
R
R
P-P
1.5V
noise in
MAX44251
BUFFER
R
20V
M
,
S 2.7V to 20V Power-Supply Range
S Integrated EMI Filter
S 6µV Input Offset Voltage (max) at Room
S TCV
S Low 5.9nV/√Hz Input-Referred Voltage Noise
S 123nV
S Fast 400ns Settling Time
S 10MHz Gain-Bandwidth Product
S Rail-to-Rail Output
S High Accuracy Enables Precision Signal Chain
V
V
IN+
IN-
Temperature
Acquisition
MAX11211
MAX44251/MAX44252
Strain Gauges
Pressure Transducers
Medical Instrumentation
Precision Instrumentation
Load Cell and Bridge Transducer Amplification
OS
V
V
P-P
DD
SS
of 19nV/°C (max)
OUTPUT
in 0.1Hz to 10Hz
V
REF
Typical Operating Circuit
Benefits and Features
C
1
R
1
3V
V
OUT
MAX6126
Applications
PROCESSOR
19-6000; Rev 1; 12/11
MICRO-
3.3V
V
DD

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MAX44252 Summary of contents

Page 1

... Ultra-Precision, Low-Noise Op Amps General Description The MAX44251/MAX44252 are 20V, ultra-precision, low- noise, low-drift amplifiers that offer near-zero DC offset and drift through the use of patented autocorrelating zeroing techniques. This method constantly measures and compensates the input offset, eliminating drift over time and temperature and the effect of 1/f noise. These dual and quad devices feature rail-to-rail outputs, oper- ate from a single 2 ...

Page 2

... V = 2.7V to 20V +25NC -40NC < Guaranteed by CMRR test +25NC -0.05V 1.5V) CMRR -40NC < T < +125NC A MAX44251/MAX44252 MIN TYP 2 140 145 1.15 < +125NC 0. 133 140 130 ) ........120°C ...............37°C/W JC MAX UNITS ...

Page 3

... 1V/ OUT P sustained oscillation OUT P 1kHz A = +1V/V, V THD R = 10kI 20kHz 0.01 step, A OUT MAX44251/MAX44252 MIN TYP 3 5 200 400 145 154 < +125NC 136 5.9 123 0 ...

Page 4

... V OL OUT 2kI 10kI OUT R = 2kI 1kHz N 0.1Hz < f < 10Hz 1kHz GBW MAX44251/MAX44252 MIN TYP 1.1 < +125NC 0. 120 129 117 3 8 200 400 136 151 < +125NC 133 ...

Page 5

... INPUT OFFSET VOLTAGE DRIFT HISTOGRAM 5.5 -0.001 0 0.001 0.002 0.003 0.004 OFFSET VOLTAGE DRIFT (µV/°C) MAX44251/MAX44252 MIN TYP 1V/V 500 V -124 -100 = -1V/V 200 V SUPPLY CURRENT vs. SUPPLY VOLTAGE 1 +125°C A 1.2 1 +25°C ...

Page 6

... TEMPERATURE 1000 750 POSITIVE I BIAS 500 250 0 -250 -500 NEGATIVE I BIAS -750 -1000 -1250 3 4 -50 - TEMPERATURE (°C) MAX44251/MAX44252 INPUT OFFSET VOLTAGE vs. TEMPERATURE -50 - TEMPERATURE (°C) COMMON-MODE REJECTION RATIO vs. FREQUENCY 160 140 120 100 80 ...

Page 7

... FREQUENCY (Hz) INPUT CURRENT NOISE vs. FREQUENCY 0.2µV/div 100 FREQUENCY (Hz) MAX44251/MAX44252 OUTPUT VOLTAGE SWING HIGH vs. TEMPERATURE -50 - TEMPERATURE (°C) INPUT VOLTAGE NOISE vs. FREQUENCY ...

Page 8

... TIME (2µs/div) TOTAL HARMONIC DISTORTION vs. FREQUENCY -100 -105 -110 -115 -120 -125 -130 -135 -140 100 1k FREQUENCY (Hz) L UNSTABLE 10k MAX44251/MAX44252 LARGE-SIGNAL STEP RESPONSE MAX44251 toc20 P-P INPUT OUTPUT TIME (2µs /div) TOTAL HARMONIC DISTORTION vs. INPUT VOLTAGE 3.3V CC ...

Page 9

... INC- Channel C Negative Input INC+ Channel C Positive Input IND+ Channel D Positive Input IND- Channel D Negative Input OUTD Channel B Output Pin Configurations + OUTA 1 14 OUTD INA IND- MAX44252 INA IND INB INC+ INB INC- OUTB 7 8 ...

Page 10

... This ADC is part of a family of 16-, 18-, 20-, and 24-bit delta sigma ADCs with high precision and < 1mW power dissipation. The MAX44251/MAX44252's low input offset voltage and low noise allow a gain circuit prior to the MAX11211 with- out losing any dynamic range at the ADC. ...

Page 11

... TEMP RANGE PACKAGE -40NC to +125NC 8 SOT23 -40NC to +125NC 8 FMAX -40NC to +125NC 14 SOIC Functional Diagrams TOP VIEW + OUTA 1 MAX44251 INA- 2 INA OUTA 1 INA- 2 INA+ 3 MAX44252 INB+ 5 INB- 6 OUTB 7 TOP MARK AERC — — OUTB 6 INB- 5 INB+ 14 OUTD 13 IND- ...

Page 12

... Maxim Integrated Products 12 MAX44251/MAX44252 PACKAGE CODE OUTLINE NO ...

Page 13

... Maxim Integrated Products 13 MAX44251/MAX44252 Package Information (continued) α ...

Page 14

... Maxim Integrated Products 14 MAX44251/MAX44252 ...

Page 15

... Released the MAX44252 and updated the Typical Operating Characteristics. 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. ...

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