Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Op-amp Multi-purpose TDFN 6 (3x3)

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.

Applications

Sensor Interfaces

Loop-Powered Systems

Industrial Instrumentation

High-Voltage ATE

High-Performance ADC/DAC Input/Output

Amplifiers

Features

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)

MAX9943/MAX9944

High-Voltage, Precision, Low-Power Op Amps

________________________________________________________________

Maxim Integrated Products

19-4433; Rev 3; 4/11

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.

IN+

OUT

IN-

N.C.

MAX9943

TOP VIEW

*EP

TOP VIEW

6 TDFN-EP

*EP = EXPOSED PAD.

Package Detail

Ordering Information

PART TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX9943AUA+ -40°C to +125°C 8 μMAX AACA

MAX9943ATT+ -40°C to +125°C 6 TDFN-EP* AUF

MAX9944ASA+ -40°C to +125°C 8 SO —

MAX9944ATA+ -40°C to +125°C 8 TDFN-EP* BLN

Denotes a lead(Pb)-free/RoHS-compliant package.

EP = Exposed pad.

MAX9943 toc17

LOAD

(Ω)

LOAD

(pF)

1000 10,000

1000

10,000

100,000

100

100 100,000

STABLE

UNSTABLE

Capacitive Load vs. Resistive Load

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

Pin Configurations appear at end of data sheet.

Summary of content (15 pages)

PAGE 1
9-4433; Rev 3; 4/11 High-Voltage, Precision, Low-Power Op Amps 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 supply range operating from ±3V to ±19V dual supplies or a 6V to 38V single supply.
PAGE 2
MAX9943/MAX9944 High-Voltage, Precision, Low-Power Op Amps ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC to VEE) ..................................-0.3V to +40V All Other Pins (Note 1) .....................(VEE - 0.3V) to (VCC + 0.3V) OUT Short-Circuit Current Duration 8-Pin μMAX (VCC - VEE ≤ 20V)...............................................3s 8-Pin μMAX (VCC - VEE > 20V) ................................Momentary 6-Pin TDFN (VCC - VEE ≤ 20V) .............................................
PAGE 3
High-Voltage, Precision, Low-Power Op Amps (VCC = 15V, VEE = -15V, VCM = 0V, RL = 10kΩ to GND, VGND = 0V, TA = -40°C to +125°C. Typical values are at TA = +25°C, unless otherwise noted.) (Note 3) PARAMETER Open-Loop Gain SYMBOL AVOL CONDITIONS MIN TYP -13.5V ≤ VO ≤ +13.5V, RL = 10kΩ, TA = +25°C 115 130 -13.5V ≤ VO ≤ +13.
PAGE 4
Typical Operating Characteristics (VCC = 15V, VEE = -15V, VCM = 0V, RL = 10kΩ to GND, VGND = 0V, TA = +25°C, unless otherwise noted.) INPUT VOLTAGE OFFSET DRIFT HISTOGRAM 10 650 SUPPLY CURRENT (µA) 15 700 MAX9943 toc02 60 FREQUENCY (%) 20 SUPPLY CURRENT vs.
PAGE 5
High-Voltage, Precision, Low-Power Op Amps INPUT BIAS CURRENT vs. SUPPLY VOLTAGE INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE 2.0 1.5 1.0 0.5 2.0 1.5 1.0 0.5 0 0 -10 -6 -2 2 6 10 6 14 10 14 22 26 30 34 SUPPLY VOLTAGE (V) COMMON-MODE REJECTION RATIO vs. FREQUENCY POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 160 MAX9943 toc10 140 130 140 120 110 100 PSRR (dB) 120 100 60 80 40 70 20 0.1 1 10 100 0 0.001 0.01 1000 10,000 1 10 100 1000 10,000 VOL vs.
PAGE 6
Typical Operating Characteristics (continued) (VCC = 15V, VEE = -15V, VCM = 0V, RL = 10kΩ to GND, VGND = 0V, TA = +25°C, unless otherwise noted.) INPUT VOLTAGE NOISE vs. FREQUENCY OUTPUT IMPEDANCE vs. FREQUENCY 10 1 0.1 MAX9943 toc15 MAX9943 toc14 100 100 90 INPUT VOLTAGE NOISE (nV/√Hz) OUTPUT IMPEDANCE (Ω) 1000 80 70 60 50 40 30 20 10 0 0.01 0.1 1 10 100 1000 1 10,000 10 100 1000 10,000 100,000 FREQUENCY (Hz) FREQUENCY (kHz) OPEN-LOOP GAIN vs. FREQUENCY CAPACITIVE LOAD vs.
PAGE 7
High-Voltage, Precision, Low-Power Op Amps MAX9943 6 TDFN-EP MAX9943 8 µMAX MAX9944 8 SO/TDFN-EP NAME FUNCTION 1 6 — OUT — — 1 OUTA Output — — 7 OUTB 2 4 4 VEE Negative Power Supply. Bypass with a 0.1μF capacitor to ground. 3 3 — IN+ Positive Input — — 3 INA+ — — 5 INB+ Positive Input B 4 2 — IN- Negative Input — — 2 INA- — — 6 INB- Negative Input B 5 1, 5, 8 — N.C. No Connection 6 7 8 VCC Positive Power Supply. Bypass with a 0.
PAGE 8
MAX9943/MAX9944 High-Voltage, Precision, Low-Power Op Amps Power Supplies and Layout The MAX9943/MAX9944 can operate with dual supplies from ±3V to ±19V or with a single supply from +6V to +38V with respect to ground. When used with dual supplies, bypass both VCC and VEE with their own 0.1μF capacitor to ground. When used with a single supply, bypass VCC with a 0.1μF capacitor to ground.
PAGE 9
High-Voltage, Precision, Low-Power Op Amps MAX9943/MAX9944 +15V -15V VREF RSENSE DAC MAX9944 RLOAD -15V Figure 3.
PAGE 10
High-Voltage, Precision, Low-Power Op Amps MAX9943/MAX9944 Pin Configurations TOP VIEW MAX9944 MAX9943 + + N.C. 1 8 N.C. IN- 2 7 IN+ 3 VEE 4 OUTA 1 8 VCC VCC INA- 2 7 OUTB 6 OUT INA+ 3 6 INB- 5 N.C. VEE 4 5 INB+ 1 8 VCC INA- 2 7 OUTB INA+ 6 INB- 5 INB+ 8 μMAX 8 SO TOP VIEW MAX9944 MAX9943 + OUT 1 VEE 2 IN+ *EP 3 6 VCC 5 N.C. 4 TOP VIEW 6 TDFN IN- OUTA 3 VEE 4 *EP TOP VIEW 8 TDFN NOT TO SCALE. *EP = EXPOSED PAD.
PAGE 11
High-Voltage, Precision, Low-Power Op Amps PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 8 μMAX U8+1 21-0036 90-0092 6 TDFN-EP T633+2 21-0137 90-0058 8 SO S8+4 21-0041 90-0096 8 TDFN-EP T833+2 21-0137 90-0059 α α ______________________________________________________________________________________ 11 MAX9943/MAX9944 Package Information For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages.
PAGE 12
MAX9943/MAX9944 High-Voltage, Precision, Low-Power Op Amps Package Information (continued) For the latest package outline information and land patterns (footprints), go to 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 pertains to the package regardless of RoHS status.
PAGE 13
High-Voltage, Precision, Low-Power Op Amps COMMON DIMENSIONS PACKAGE VARIATIONS MIN. MAX. PKG. CODE N D2 E2 e JEDEC SPEC b A 0.70 0.80 T633-2 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF D 2.90 3.10 T833-2 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF E 2.90 3.10 T833-3 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF 2.00 REF SYMBOL [(N/2)-1] x e A1 0.00 0.05 T1033-1 10 1.50±0.10 2.30±0.10 0.
PAGE 14
MAX9943/MAX9944 High-Voltage, Precision, Low-Power Op Amps Package Information (continued) For the latest package outline information and land patterns (footprints), go to 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 pertains to the package regardless of RoHS status.
PAGE 15
High-Voltage, Precision, Low-Power Op Amps REVISION NUMBER REVISION DATE DESCRIPTION 0 3/09 Initial release 1 4/09 Removed future product reference for the MAX9944, updated EC table 2 6/09 Corrected TOC 13 and added rail-to-rail output feature 3 4/11 Updated Pin Description section PAGES CHANGED — 1, 2 1, 3, 5, 8 7 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.