MAX9943

Manufacturer Part NumberMAX9943
DescriptionThe MAX9943/MAX9944 is a family of high-voltage amplifiers that offers precision, low drift, and low power consumption
ManufacturerMaxim
MAX9943 datasheet
 


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19-4433; Rev 3; 4/11
High-Voltage, Precision, Low-Power Op Amps
General Description
The MAX9943/MAX9944 is a family of high-voltage
amplifiers that offers precision, low drift, and low-power
consumption.
The MAX9943 (single) and MAX9944 (dual) op amps
offer 2.4MHz of gain-bandwidth product with only
550μA of supply current per amplifier.
The MAX9943/MAX9944 family has a wide power sup-
ply range operating from ±3V to ±19V dual supplies or
a 6V to 38V single supply.
The MAX9943/MAX9944 is ideal for sensor signal condi-
tioning, high-performance industrial instrumentation and
loop-powered systems (e.g., 4mA–20mA transmitters).
The MAX9943 is offered in a space-saving 6-pin TDFN or
®
8-pin μMAX
package. The MAX9944 is offered in an
8-pin SO or an 8-pin TDFN package. These devices are
specified over the -40°C to +125°C automotive tempera-
ture range.
Sensor Interfaces
Loop-Powered Systems
Industrial Instrumentation
High-Voltage ATE
High-Performance ADC/DAC Input/Output
Amplifiers
μMAX is a registered trademark of Maxim Integrated Products, Inc.
Capacitive Load vs. Resistive Load
100,000
UNSTABLE
10,000
1000
STABLE
100
100
1000
10,000
R
(Ω)
LOAD
Pin Configurations appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products
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.
o Wide 6V to 38V Supply Range
o Low 100µV (max) Input Offset Voltage
o Low 0.4µV/°C Offset Drift
o Unity Gain Stable with 1nF Load Capacitance
o 2.4MHz Gain-Bandwidth Product
o 550µA Supply Current
o 20mA Output Current
o Rail-to-Rail Output
o Package Options
3mm x 5mm, 8-Pin µMAX or 3mm x 3mm, 6-Pin
TDFN Packages (Single)
5mm x 6mm, 8-Pin SO or 3mm x 3mm, 8-Pin
TDFN Packages (Dual)
Applications
PART
MAX9943AUA+
MAX9943ATT+
MAX9944ASA+
MAX9944ATA+
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
TOP VIEW
100,000
Features
Ordering Information
PIN-
TEMP RANGE
PACKAGE
-40°C to +125°C 8 μMAX
-40°C to +125°C 6 TDFN-EP*
-40°C to +125°C 8 SO
-40°C to +125°C 8 TDFN-EP*
Package Detail
MAX9943
*EP
OUT
1
V
6
CC
2
V
5
N.C.
EE
IN+
3
4
IN-
TOP VIEW
6 TDFN-EP
*EP = EXPOSED PAD.
TOP
MARK
AACA
AUF
BLN
1

MAX9943 Summary of contents

  • Page 1

    ... The MAX9943/MAX9944 is ideal for sensor signal condi- tioning, high-performance industrial instrumentation and loop-powered systems (e.g., 4mA–20mA transmitters). The MAX9943 is offered in a space-saving 6-pin TDFN or ® 8-pin μMAX package. The MAX9944 is offered in an 8-pin 8-pin TDFN package. These devices are specified over the -40° ...

  • Page 2

    ... Note 1: Operation is limited by thermal limits. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation 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 ...

  • Page 3

    High-Voltage, Precision, Low-Power Op Amps ELECTRICAL CHARACTERISTICS (continued 15V -15V 0V otherwise noted.) (Note 3) PARAMETER Open-Loop Gain Output Voltage Swing Short-Circuit Current AC CHARACTERISTICS Gain Bandwidth Product Slew ...

  • Page 4

    High-Voltage, Precision, Low-Power Op Amps (V = 15V -15V 0V OFFSET VOLTAGE HISTOGRAM -60 -50 -40 -30 -20 - ...

  • Page 5

    High-Voltage, Precision, Low-Power Op Amps (V = 15V -15V 0V 10kΩ to GND INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE 3.0 2.5 2.0 1.5 1.0 0.5 0 -14 -10 -6 ...

  • Page 6

    ... MAX9943 toc18 20mV/div OUT 1μs/div INPUT VOLTAGE NOISE vs. FREQUENCY 100 1000 10,000 100,000 FREQUENCY (Hz) CAPACITIVE LOAD vs. RESISTIVE LOAD UNSTABLE STABLE 100 1000 10,000 100,000 R (Ω) LOAD LARGE SIGNAL-STEP RESPONSE MAX9943 toc19 1V/div 10μs/div ...

  • Page 7

    ... The output can swing to the negative rail while deliver- ing 20mA of current, which is ideal for loop-powered system applications. The specifications and operation of the MAX9943/MAX9944 family is guaranteed over the -40°C to +125°C temperature range. _______________________________________________________________________________________ NAME ...

  • Page 8

    ... Figure 1. Capacitive Load Driving Circuit Figure 2. Input Protection Circuit During normal op-amp operation, the inverting and non- inverting inputs of the MAX9943/MAX9944 are at essen- tially the same voltage. However, either due to fast input voltage transients or due to other fault conditions, these pins can be forced two different voltages. ...

  • Page 9

    High-Voltage, Precision, Low-Power Op Amps +15V DAC Figure 3. Typical ±20mA Current-Source in Loop-Powered Systems _______________________________________________________________________________________ -15V V REF R SENSE MAX9944 -15V R LOAD 9 ...

  • Page 10

    ... IN+ TOP VIEW NOT TO SCALE. *EP = EXPOSED PAD. 10 ______________________________________________________________________________________ MAX9943 + 8 N.C. OUTA INA OUT INA N. μMAX MAX9943 + * OUTA 1 INA N.C. INA IN- 6 TDFN Pin Configurations MAX9944 OUTB INB INB ...

  • Page 11

    ... High-Voltage, Precision, Low-Power Op Amps For the latest package outline information and land patterns (footprints www.maxim-ic.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 per- tains to the package regardless of RoHS status ...

  • Page 12

    ... High-Voltage, Precision, Low-Power Op Amps For the latest package outline information and land patterns (footprints www.maxim-ic.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 per- tains to the package regardless of RoHS status ...

  • Page 13

    ... High-Voltage, Precision, Low-Power Op Amps For the latest package outline information and land patterns (footprints www.maxim-ic.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 per- tains to the package regardless of RoHS status ...

  • Page 14

    ... High-Voltage, Precision, Low-Power Op Amps For the latest package outline information and land patterns (footprints www.maxim-ic.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 per- tains to the package regardless of RoHS status ...

  • Page 15

    ... Updated Pin Description section 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © ...