Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Op-amp Multi-purpose SOIC 14

MAX44244/MAX44245/MAX44248

36V, Precision, Low-Power, 90µA,

Single/Quad/Dual Op Amps

Typical Operating Circuit

19-6367; Rev 4; 12/14

General Description

The MAX44244/MAX44245/MAX44248 family of parts

provide ultra-precision, low-noise, zero-drift single/quad/

dual operational amplifiers featuring very low-power

operation with a wide supply range. The devices incor-

porate a patented auto-zero circuit that constantly mea-

sures and compensates the input offset to eliminate drift

over time and temperature as well as the effect of 1/f

noise. These devices also feature integrated EMI filters

to reduce high-frequency signal demodulation on the

output. The op amps operate from either a single 2.7V to

36V supply or dual ±1.35V to ±18V supply. The devices

are unity-gain stable with a 1MHz gain-bandwidth prod-

uct and a low 90µA supply current per amplifier.

The low offset and noise specifications and high supply

range make the devices ideal for sensor interfaces and

transmitters.

The devices are available in FMAXM, SO, SOT23, and

TSSOP packages and are specified over the -40NC to

+125NC automotive operating temperature range.

Applications

Sensors Interfaces

4mA to 20mA and 0 to10V Transmitters

PLC Analog I/O Modules

Weight Scales

Portable Medical Devices

Benefits and Features

S Reduces Power for Sensitive Precision Applications

Low 90µA Quiescent Current per Amplifier

S Eliminates the Cost of Calibration with Increased

Accuracy with Maxim’s Patented Autozero Circuitry

Very Low Input Voltage Offset 7.5µV (max)

Low 30nV/NC Offset Drift (max)

S Low Noise Ideal for Sensor Interfaces and

Transmitters

50nV/√Hz at 1kHz

0.5µV

P-P

from 0.1Hz to 10Hz

S 1MHz Gain-Bandwidth Product

EMI Suppression Circuitry

S Rail-to-Rail Output

S Wide Supply for High-Voltage Front Ends

2.7V to 36V Supply Range

S µMAX, SO, SOT23, TSSOP Packages

Ordering Information appears at end of data sheet.

µMAX is a registered trademark of Maxim Integrated Products, Inc.

EVALUATION KIT AVAILABLE

MAX5216

DAC

MAX6033

REF

SENSE

REF

LP+

LP-

SIG

(4-20mA)

MAX44244

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 (14 pages)

PAGE 1
EVALUATION KIT AVAILABLE MAX44244/MAX44245/MAX44248 36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps General Description Benefits and Features The MAX44244/MAX44245/MAX44248 family of parts provide ultra-precision, low-noise, zero-drift single/quad/ dual operational amplifiers featuring very low-power operation with a wide supply range.
PAGE 2
MAX44244/MAX44245/MAX44248 36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps ABSOLUTE MAXIMUM RATINGS VDD to VSS.............................................................-0.3V to +40V Common-Mode Input Voltage.........(VSS - 0.3V) to (VDD + 0.3V) Differential Input Voltage IN_+, IN_- .......................................6V Continuous Input Current Into Any Pin............................ Q20mA Output Voltage to VSS (OUT_).................– 0.3V to (VDD + 0.
PAGE 3
MAX44244/MAX44245/MAX44248 36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps ELECTRICAL CHARACTERISTICS (continued) (VDD = 10V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 5kI to VDD/2, TA = -40NC to +125NC, unless otherwise noted. Typical values are at +25NC.
PAGE 4
MAX44244/MAX44245/MAX44248 36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps ELECTRICAL CHARACTERISTICS (VDD = 30V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 5kI to VDD/2, TA = -40NC to +125NC, unless otherwise noted. Typical values are at +25NC.
PAGE 5
MAX44244/MAX44245/MAX44248 36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps ELECTRICAL CHARACTERISTICS (continued) (VDD = 30V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 5kI to VDD/2, TA = -40NC to +125NC, unless otherwise noted. Typical values are at +25NC.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Slew Rate SR AV = 1V/V, VOUT = 2VP-P 0.
PAGE 6
MAX44244/MAX44245/MAX44248 36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps Typical Operating Characteristics (continued) (VDD = 10V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 5kω to VDD/2. Typical values are at TA = +25°C.) INPUT OFFSET VOLTAGE vs. COMMON-MODE VOLTAGE 94 92 90 88 86 2 OFFSET VOLTAGE (µV) 1 OFFSET VOLTAGE (µV) 96 3 MAX44248 toc05 98 SUPPLY CURRENT (µA) 2 MAX44248 toc04 100 INPUT OFFSET VOLTAGE VS. TEMPERATURE 0 -1 -2 MAX44248 toc06 SUPPLY CURRENT vs.
PAGE 7
MAX44244/MAX44245/MAX44248 36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps Typical Operating Characteristics (continued) (VDD = 10V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 5kω to VDD/2. Typical values are at TA = +25°C.) OUTPUT VOLTAGE HIGH vs. TEMPERATURE -40 60 MAX44248 toc12 -20 70 50 -60 -80 -100 VOUT - VSS (mV) 60 VDD - VOUT (mV) PSRR (dB) 80 MAX44248 toc11 0 OUTPUT VOLTAGE LOW vs. TEMPERATURE MAX44248 toc13 POWER-SUPPLY REJECTION RATIO vs.
PAGE 8
MAX44244/MAX44245/MAX44248 36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps Typical Operating Characteristics (continued) (VDD = 10V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 5kω to VDD/2. Typical values are at TA = +25°C.) INPUT CURRENT NOISE vs. FREQUENCY 7 6 5 4 3 2 1 100 80 60 40 20 10 100 1k 10k 120 100 80 60 40 20 0 0 -20 -20 -40 -40 0 0.
PAGE 9
MAX44244/MAX44245/MAX44248 36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps Typical Operating Characteristics (continued) (VDD = 10V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 5kω to VDD/2. Typical values are at TA = +25°C.) OUTPUT STABILITY vs. CAPACITIVE LOAD OUTPUT STABILITY vs.
PAGE 10
MAX44244/MAX44245/MAX44248 36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps Pin Configurations TOP VIEW + OUTA 1 5 VDD MAX44244 VSS 2 INA+ 3 4 N.C. 1 INA- 2 INA+ 3 VSS 4 + 8 MAX44244 INA- N.C. 7 VDD 6 OUTA 5 N.C.
PAGE 11
MAX44244/MAX44245/MAX44248 36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps Pin Description PIN MAX44244 MAX44245 MAX44248 NAME FUNCTION SOT23 µMAX SO-14 TSSOP SO-8 µMAX 1 6 1 1 1 1 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 Input — —
PAGE 12
MAX44244/MAX44245/MAX44248 36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps circuit, both the DAC and the reference are referred to the local ground. The MAX44244 op-amp inputs are capable of swinging to the negative supply (which is the local ground in this case). R3 acts as a current mirror with RSENSE. Therefore, if RSENSE = 50Ω (i.e. 20mA will drop 1V) and if the current through R3 is 10μA when IOUT is 20mA (0.05% error) then R3 = 100kΩ.
PAGE 13
MAX44244/MAX44245/MAX44248 36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps Chip Information Package Information Ordering Information For the latest package outline information and land patterns (footprints), 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.
PAGE 14
MAX44244/MAX44245/MAX44248 36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps Revision History REVISION NUMBER REVISION DATE 0 7/12 Initial release 1 6/13 Added the MAX44244/MAX44245 to data sheet. Updated the Electrical Characteristics, Absolute Maximum Ratings, Pin Description, and Pin Configurations. 2 9/13 Released the MAX44244 for introduction.