Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Op-amp Multi-purpose uMAX 8

MAX44241/MAX44243/MAX44246

36V, Low-Noise, Precision,

Single/Quad/Dual Op Amps

19-6375; Rev 5; 1/14

Ordering Information appears at end of data sheet.

For related parts and recommended products to use with this part,

refer to www.maximintegrated.com/MAX44246.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 unity-gain stable with a gain-bandwidth

product of 5MHz. With excellent specifications such as

offset voltage of 5FV (max), drift of 20nV/NC (max), and

117nV

P-P

noise in 0.1Hz to 10Hz, these ICs are ideally

suited for applications requiring ultra-low noise, and DC

precision such as interfacing with pressure sensors,

strain gauges, precision weight scales, and medical

instrumentation.

The ICs are available in 8-pin FMAXM or SO packages

and are rated over the -40NC to +125NC temperature

range.

Applications

Features

S 2.7V to 36V Power-Supply Range

S Ultra-Low Input V

: 5µV (max)

S Low 20nV/°C (max) of Offset Drift

S Low 9nV/√Hz noise at 1kHz

S 1µs Fast Settling Time

S 5MHz Gain-Bandwidth Product

S Rail-to-Rail Output

S Integrated EMI Filter

S Low 0.55mA Per Channel (max) Quiescent Current

S 8-Pin µMAX/SO Package

Battery-Powered

Equipment

PLC Analog I/O

Modules

Transducer Amplifiers

Load Cell Amplifiers

Precision

Instrumentation

15V

3.3V

MICRO-

PROCESSOR

OUT

50R

REF

IN-

IN+

BUFFER

½ MAX44246

MAX11211

MAX6126

15V

1.5V

BUFFER

OUTPUT

½ MAX44246

-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.

Summary of content (13 pages)

PAGE 1
EVALUATION KIT AVAILABLE MAX44241/MAX44243/MAX44246 36V, Low-Noise, Precision, Single/Quad/Dual Op Amps General Description Features The MAX44241/MAX44243/MAX44246 are 36V, ultraprecision, low-noise, low-drift, single/quad/dual operational amplifiers that offer near-zero DC offset and drift through the use of patented chopper stabilized and auto-zeroing techniques. This method constantly measures and compensates the input offset, eliminating drift over time and temperature and the effect of 1/f noise.
PAGE 2
MAX44241/MAX44243/MAX44246 36V, Low-Noise, Precision, Single/Quad/Dual Op Amps ABSOLUTE MAXIMUM RATINGS Supply Voltage (VDD to GND) ..............................-0.3V to +40V All Other Pins.................................(GND - 0.3V) to (VDD + 0.3V) Short-Circuit Duration, OUTA, OUTB to Either Supply Rail………………………….............. 1s Continuous Input Current (Any Pin) ...................................20mA Differential Input Current..................................................
PAGE 3
MAX44241/MAX44243/MAX44246 36V, Low-Noise, Precision, Single/Quad/Dual Op Amps ELECTRICAL CHARACTERISTICS (continued) (VDD = 30V, VGND = 0V, VIN+ = VIN- = VDD /2, RL = 5kΩ to VDD /2, TA = -40°C to +125°C, unless otherwise noted. Typical values at TA = +25°C.
PAGE 4
MAX44241/MAX44243/MAX44246 36V, Low-Noise, Precision, Single/Quad/Dual Op Amps ELECTRICAL 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 at TA = +25°C.) (Note 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS (VDD – 1.
PAGE 5
MAX44241/MAX44243/MAX44246 36V, Low-Noise, Precision, Single/Quad/Dual Op Amps Typical Operating Characteristics (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) INPUT OFFSET VOLTAGE DRIFT HISTOGRAM 20 15 10 5 -1.0 -1.5 MAX44241 toc02 400 30 25 20 15 -0.5 0 0.5 1.0 300 250 200 150 10 100 5 50 0 0 0.002 0.003 0.
PAGE 6
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) POWER-SUPPLY REJECTION RATIO vs. TEMPERATURE 170 140 60 40 120 110 0 100 -20 90 -40 1 10 100 1k 10k 100k 1M 10M -25 25 50 75 100 OUTPUT VOLTAGE LOW vs. OUTPUT SINK CURRENT OUTPUT VOLTAGE HIGH vs.
PAGE 7
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) INPUT VOLTAGE NOISE vs. FREQUENCY MAX44241 toc19 INPUT VOLTAGE NOISE (nV/√Hz) INPUT VOLTAGE 0.
PAGE 8
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) TOTAL HARMONIC DISTORTION vs.
PAGE 9
MAX44241/MAX44243/MAX44246 36V, Low-Noise, Precision, Single/Quad/Dual Op Amps Pin Configurations TOP VIEW + N.C. 1 INA- 2 INA+ 3 VSS 4 + MAX44241 8 N.C. 7 VDD 6 OUTA 5 N.C.
PAGE 10
MAX44241/MAX44243/MAX44246 36V, Low-Noise, Precision, Single/Quad/Dual Op Amps Pin Descriptions PIN MAX44241 MAX44243 MAX44246 NAME FUNCTION SOT23-5 µMAX-8 SO-14 TSSOP-14 SO-8 µMAX-8 1 6 1 1 1 1 OUTA 2 4 11 11 4 4 VSS Negative Supply Voltage 3 3 3 3 3 3 INA+ Channel A Positive Input 4 2 2 2 2 2 INA- Channel A Negative Input 5 7 4 4 8 8 VDD Positive Supply Voltage — — 5 5 5 5 INB+ Channel B Positive Input — — 6 6 6 6 INB- Channel B Negative Inp
PAGE 11
MAX44241/MAX44243/MAX44246 36V, Low-Noise, Precision, Single/Quad/Dual Op Amps Detailed Description The MAX44241/MAX44243/MAX44246 are high-precision amplifiers that provide below 5µV of maximum inputreferred offset and low flicker noise. These characteristics are achieved by using a combination of proprietary auto-zeroing and chopper stabilized techniques.
PAGE 12
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 performance follow the following layout guidelines. Avoid temperature gradients at the junction of two dissimilar metals. The most common dissimilar metals used on a PCB are solder-to-component lead and solder-toboard trace. Dissimilar metals create a local thermocouple.
PAGE 13
MAX44241/MAX44243/MAX44246 36V, Low-Noise, Precision, Single/Quad/Dual Op Amps Revision History REVISION NUMBER REVISION DATE DESCRIPTION 0 7/12 Initial release 1 9/12 Revised the Electrical Characteristics and the Typical Operating Characteristics. PAGES CHANGED — 1, 2, 3, 5 2 2/13 Revised the Typical Operating Characteristics. 3 5/13 Updated General Description, Typical Application Circuit, and Pin Description. 1, 9 8 4 9/13 Added the MAX44241/MAX44243 to the data sheet.