Rainbow Electronics MAX4040, MAX4044 User Manual

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________________General Description

The MAX4040–MAX4044 family of micropower op amps
operates from a single +2.4V to +5.5V supply or dual
±1.2V to ±2.75V supplies and have Rail-to-Rail®input
and output capabilities. These amplifiers provide a
90kHz gain-bandwidth product while using only 10µA of
supply current per amplifier. The MAX4041/MAX4043
have a low-power shutdown mode that reduces supply
current to less than 1µA and forces the output into a
high-impedance state. The combination of low-voltage
operation, rail-to-rail inputs and outputs, and ultra-low
power consumption makes these devices ideal for any
portable/battery-powered system.

These amplifiers have outputs that typically swing to
within 10mV of the rails with a 100kΩ load. Rail-to-rail
input and output characteristics allow the full power­supply voltage to be used for signal range. The combi­nation of low input offset voltage, low input bias current,
and high open-loop gain makes them suitable for low­power/low-voltage precision applications.

The MAX4040 is offered in a space-saving 5-pin SOT23
package. All specifications are guaranteed over the

-40°C to +85°C extended temperature range.

________________________Applications

Battery-Powered Strain Gauges
Systems

Sensor Amplifiers

Portable/Battery-Powered Cellular Phones
Electronic Equipment

Notebook Computers

Digital Scales PDAs

____________________________Features

♦ Single-Supply Operation Down to +2.4V
♦ Ultra-Low Power Consumption:

10µA Supply Current per Amplifier
1µA Shutdown Mode (MAX4041/MAX4043)

♦ Rail-to-Rail Input Common-Mode Range
♦ Outputs Swing Rail-to-Rail
♦ No Phase Reversal for Overdriven Inputs
♦ 200µV Input Offset Voltage
♦ Unity-Gain Stable for Capacitive Loads up to 200pF
♦ 90kHz Gain-Bandwidth Product
♦ Available in Space-Saving 5-Pin SOT23 and

8-Pin µMAX Packages

MAX4040–MAX4044

Single/Dual/Quad, Low-Cost, SOT23,

Micropower Rail-to-Rail I/O Op Amps

________________________________________________________________

Maxim Integrated Products

1

V

EE

IN-IN+

15V

CC

OUT

MAX4040

SOT23-5

TOP VIEW

2

34

19-1377; Rev 0; 5/98

PART

MAX4040EUK-T

MAX4040EUA
MAX4040ESA -40°C to +85°C

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE

PIN-

PACKAGE

5 SOT23-5
8 µMAX
8 SO

Ordering Information

Pin Configurations continued at end of data sheet.

NO. OF

AMPS

PIN-PACKAGE

MAX4040 1

5-pin SOT23,
8-pin µMAX/SO

PART

MAX4041 1 8-pin µMAX/SO

SHUTDOWN

—

Yes

MAX4044 4 14-pin SO—

Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.

MAX4042EUA
MAX4042ESA -40°C to +85°C

-40°C to +85°C 8 µMAX
8 SO

MAX4044ESD

-40°C to +85°C 14 SO

SOT

TOP MARK

ACGF

—
—

—
—

—

Pin Configurations

Selector Guide

MAX4042 2 8-pin µMAX/SO—

MAX4043 2

10-pin µMAX/
14-pin SO

Yes

MAX4041ESA
MAX4041EUA -40°C to +85°C

-40°C to +85°C 8 SO
8 µMAX

—
—

MAX4043EUB
MAX4043ESD -40°C to +85°C

-40°C to +85°C 10 µMAX
14 SO

—
—

MAX4040–MAX4044

Single/Dual/Quad, Low-Cost, SOT23,
Micropower, Rail-to-Rail I/O Op Amps

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—T

A

= +25°C

(VCC= +5.0V, VEE= 0, VCM= 0, V

OUT

= VCC/ 2, SHDN = VCC, RL= 100kΩ tied to VCC/ 2, unless otherwise noted.)

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.

Supply Voltage (VCCto VEE)..................................................+6V

All Other Pins ...................................(V

CC

+ 0.3V) to (VEE- 0.3V)

Output Short-Circuit Duration to V

CC

or VEE..............Continuous

Continuous Power Dissipation (T

A

= +70°C)

5-Pin SOT23 (derate 7.1mW/°C above +70°C).............571mW

8-Pin µMAX (derate 4.1mW/°C above +70°C)..............330mW

8-Pin SO (derate 5.88mW/°C above +70°C).................471mW

10-Pin µMAX (derate 5.6mW/°C above +70°C)...........444mW

14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range.............................-65°C to +160°C

Lead Temperature (soldering, 10sec).............................+300°C

14 20VCC= 5.0V

VEE≤ VCM≤ V

CC

Input Offset Current I

OS

±0.5 ±3.0 nA

VEE≤ VCM≤ V

CC



V

IN+

- V

IN-



< 1.0V

Differential Input
Resistance

R

IN(DIFF)

45 MΩ

2.0 5.0



V

IN+

- V

IN-



> 2.5V

SHDN = VEE, MAX4041
and MAX4043 only

Large-Signal
Voltage Gain

Shutdown Supply
Current per Amplifier

I

CC(SHDN)

1.0

Supply-Voltage Range V

CC

2.4 5.5 VInferred from PSRR test

Output Voltage
Swing High

4.4 kΩ

V

OH

Inferred from the CMRR test

mV

A

VOL

dB

PARAMETER SYMBOL MIN TYP MAX UNITS

Supply Current
per Amplifier

I

CC

10

µA

94

VCC= 2.4V

10

Specified as VCC- V

OH



Power-Supply
Rejection Ratio

PSRR dB

(VEE+ 0.2V) ≤ V

OUT

≤ (VCC- 0.2V)

60 90

74 85

Output Voltage
Swing Low

Input Common-Mode
Voltage Range

RL= 100kΩ
RL= 25kΩ

RL= 100kΩ
RL= 25kΩ

µA

V

CM

V

EE

V

CC

V

2.4V ≤ VCC≤ 5.5V 75 85

VCC= 2.4V

V

OL

mV

10

Specified as VEE- V

OL



Input Bias Current I

B

±2 ±10 nA

40 60

RL= 100kΩ
RL= 25kΩ

Output Short-Circuit
Current

I

OUT(SC)

mA

0.7Sourcing

2.5

Channel-to-Channel
Isolation

Sinking

dB

CONDITIONS

80Specified at DC, MAX4042/MAX4043/MAX4044 only

VCC= 5.0V

±0.20 ±2.0

V

OS

Input Offset Voltage

mV

±0.25 ±2.5

VEE≤ VCM≤ V

CC

70 94

dBCMRR

Common-Mode
Rejection Ratio

MAX404_EU_
All other packages

65 94

VEE≤ VCM≤ V

CC

MAX4044ESD
MAX404_EU_
All other packages mV±0.20 ±1.50

Single/Dual/Quad, Low-Cost, SOT23,

Micropower, Rail-to-Rail I/O Op Amps

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—TA= +25°C (continued)

(VCC= +5.0V, VEE= 0, VCM= 0, V

OUT

= VCC/ 2, SHDN = VCC, RL= 100kΩ tied to VCC/ 2, unless otherwise noted.)

MAX4040–MAX4044

PARAMETER SYMBOL MIN TYP MAX UNITSCONDITIONS

Supply Current
per Amplifier

I

CC

28

Supply-Voltage Range V

CC

2.4 5.5 VInferred from PSRR test

VEE≤ VCM≤ V

CC

Input Offset Current I

OS

±8 nA

Input Voltage Noise Density e

n

70

nV/√Hz

Input Current Noise Density i

n

0.05

pA/√Hz
Capacitive-Load Stability 200 pF
Power-Up Time t

ON

200 µs

Input Capacitance C

IN

3 pF

f = 1kHz
f = 1kHz
A

VCL

= +1V/V, no sustained oscillations

Slew Rate SR 40 V/ms

Total Harmonic Distortion THD 0.05 %
Settling Time to 0.01% t

S

50 µs

fIN= 1kHz, V

OUT

= 2Vp-p, AV= +1V/V

AV= +1V/V, V

OUT

= 2V

STEP

PARAMETER SYMBOL MIN TYP MAX UNITSCONDITIONS

Gain Margin G

m

18 dB

Output Leakage Current in
Shutdown

I

OUT(SHDN)

20 100 nA

SHDN = VEE= 0, MAX4041/MAX4043 only
(Note 1)

µA

6.0

SHDN = VEE, MAX4041 and MAX4043 only

Shutdown Supply
Current per Amplifier

I

CC(SHDN)

µA

Shutdown Time t

SHDN

50 µsMAX4041 and MAX4043 only

Enable Time from Shutdown t

EN

150 µsMAX4041 and MAX4043 only

ELECTRICAL CHARACTERISTICS—TA= T

MIN

to

T

MAX

(VCC= +5.0V, VEE= 0, VCM= 0, V

OUT

= VCC/ 2, SHDN = VCC, RL= 100kΩ tied to VCC/ 2, unless otherwise noted.) (Note 2)

Input Offset Voltage Drift TC

VOS

2 µV/°C

VEE≤ VCM≤ V

CC

Input Bias Current I

B

±20 nA

Phase Margin

Φ

m

68 degrees

±4.5

SHDN Logic Low

V

IL

0.3 x V

CC

VMAX4041/MAX4043 only

SHDN Logic High

V

IH

0.7 x V

CC

VMAX4041/MAX4043 only

SHDN Input Bias Current

IIH, I

IL

40 120 nAMAX4041/MAX4043 only

Gain Bandwidth Product GBW 90 kHz

±5.0V

OS

Input Offset Voltage mV

±3.5

VEE≤ VCM≤ V

CC

MAX4044ESA

All other packages

MAX404_EU_

20

0

-60 -40 -20 20

40

100

SUPPLY CURRENT PER AMPLIFIER

vs. TEMPERATURE

6
4
2

16
14

18

MAX4040/44-01

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

0 60

10

8

12

80

VCC = +5.5V

VCC = +2.4V

5

0

-60 -40 -20

0

20 40 100

MAX4041/MAX4043

SHUTDOWN SUPPLY CURRENT

PER AMPLIFIER vs. TEMPERATURE

1

4

MAX4040/44-01.5

TEMPERATURE (°C)

SHUTDOWN SUPPLY CURRENT (µA)

60

2

3

80

VCC = +5.5V

SHDN = 0

VCC = +2.4V

__________________________________________Typical Operating Characteristics

(VCC= +5.0V, VEE= 0, VCM= V

CC

/ 2, SHDN = VCC, RL= 100kΩ to V

CC

/ 2, TA= +25°C, unless otherwise noted.)

MAX4040–MAX4044

Single/Dual/Quad, Low-Cost, SOT23,
Micropower, Rail-to-Rail I/O Op Amps

4 _______________________________________________________________________________________

Large-Signal Voltage
Gain

Output Voltage Swing
High

V

OH

Inferred from the CMRR test

mV

A

VOL

dB

PARAMETER SYMBOL MIN TYP MAX UNITS

Specified as VCC- V

OH



, R

L

= 25kΩ

Common-Mode
Rejection Ratio

CMRR dB

(VEE+ 0.2V) ≤ V

OUT

≤ (VCC- 0.2V), RL= 25kΩ

125

68

Output Voltage Swing
Low

Input Common-Mode
Voltage Range

V

CM

V

EE

V

CC

V

60

V

OL

mV

Specified as VEE- V

OL



, R

L

= 25kΩ

75

CONDITIONS

ELECTRICAL CHARACTERISTICS—TA= T

MIN

to

T

MAX

(continued)

(VCC= +5.0V, VEE= 0, VCM= 0, V

OUT

= VCC/ 2, SHDN = VCC, RL= 100kΩ tied to VCC/ 2, unless otherwise noted.) (Note 2)

Note 1: Tested for V

EE

≤ V

OUT

≤ VCC. Does not include current through external feedback network.

Note 2: All devices are 100% tested at T

A

= +25°C. All temperature limits are guaranteed by design.

Power-Supply
Rejection Ratio

PSRR dB2.4V ≤ VCC≤ 5.5V 70

MAX404_EU_

VEE≤ VCM≤ V

CC

All other packages 65

MAX4040–MAX4044

Single/Dual/Quad, Low-Cost, SOT23,

Micropower, Rail-to-Rail I/O Op Amps

_______________________________________________________________________________________ 5

120

0

-60 -40 -20 20

40

100

OUTPUT SWING HIGH

vs. TEMPERATURE

20

100

80

MAX4040/44-07

TEMPERATURE (°C)

VOLTAGE FROM V

CC

(mV)

0 60

60

40

80

VCC = +2.4V, RL = 10kΩ

RL TO V

EE

VCC = +5.5V, RL = 20kΩ

VCC = +5.5V, RL = 100kΩ

VCC = +2.4V, RL = 100kΩ

120

0

-60 -40 -20 20

40

100

OUTPUT SWING LOW

vs. TEMPERATURE

20

100

80

MAX4040/44-08

TEMPERATURE (°C)

VOLTAGE FROM V

EE

(mV)

0 60

60

40

80

VCC = +2.4V, RL = 10kΩ

VCC = +5.5V, RL = 20kΩ

VCC = +5.5V, RL = 100kΩ

VCC = +2.4V, RL = 100kΩ

RL TO V

CC

-80

-100

-60 -40 -20 20

40

100

COMMON-MODE REJECTION

vs. TEMPERATURE

-95

-85

MAX4040/44-09

TEMPERATURE (°C)

COMMON-MODE REJECTION (dB)

0 60

-90

80

VCC = +2.4V

VCC = +5.5V

0

-4

-60 -40 -20 20

40

100

INPUT BIAS CURRENT

vs. TEMPERATURE

-3

-1

MAX4040/44-04

TEMPERATURE (°C)

INPUT BIAS CURRENT (nA)

0 60-280

VCM = 0

VCC = +2.4V

VCC = +5.5V

5.0

-5.0
0 0.2

0.6 1.0 1.4

INPUT BIAS CURRENT vs.

COMMON-MODE VOLTAGE (V

CC

= 2.4V)

-2.5

2.5

MAX4040/44-5

VCM (V)

I

BIAS

(nA)

0

1.8

2.2

V

CC

= +2.4V

5.0

-5.0
0 0.5

1.5

2.5 3.5

4.5

INPUT BIAS CURRENT vs.

COMMON-MODE VOLTAGE (V

CC

= 5.5V)

-2.5

2.5

MAX4040/44-06

VCM (V)

I

BIAS

(nA)

0

5.5

V

CC

= +5.5V

400

0

-60 -40 -20 20

40

100

INPUT OFFSET VOLTAGE

vs. TEMPERATURE

100

300

MAX4040/44-03

TEMPERATURE (°C)

INPUT OFFSET VOLTAGE (µV)

0 60

200

80

Typical Operating Characteristics (continued)

(VCC= +5.0V, VEE= 0, VCM= V

CC

/ 2, SHDN = VCC, RL= 100kΩ to V

CC

/ 2, TA= +25°C, unless otherwise noted.)