Maxim MAX4020ESD, MAX4018ESD, MAX4018EEE, MAX4016ESA, MAX4012EUK Datasheet

_______________General Description

The MAX4012 single, MAX4016 dual, MAX4018 triple,
and MAX4020 quad op amps are unity-gain-stable
devices that combine high-speed performance with
Rail-to-Rail

®

outputs. The MAX4018 has a disable fea­ture that reduces power-supply current to 400µA and
places its outputs into a high-impedance state. These
devices operate from a +3.3V to +10V single supply or
from ±1.65V to ±5V dual supplies. The common-mode
input voltage range extends beyond the negative
power-supply rail (ground in single-supply applica­tions).

These devices require only 5.5mA of quiescent supply
current while achieving a 200MHz -3dB bandwidth and
a 600V/µs slew rate. These parts are an excellent solu­tion in low-power/low-voltage systems that require wide
bandwidth, such as video, communications, and instru­mentation. In addition, when disabled, their high output
impedance makes them ideal for multiplexing applica­tions.

The MAX4012 comes in a miniature 5-pin SOT23 pack­age, while the MAX4016 comes in 8-pin µMAX and SO
packages. The MAX4018/MAX4020 are available in a
space-saving 16-pin QSOP, as well as a 14-pin SO.

________________________Applications

Set-Top Boxes
Surveillance Video Systems
Battery-Powered Instruments
Video Line Driver
Analog-to-Digital Converter Interface
CCD Imaging Systems
Video Routing and Switching Systems

____________________________Features

♦ Low-Cost
♦ High Speed:

200MHz -3dB Bandwidth (MAX4012)
150MHz -3dB Bandwidth (MAX4016/18/20)
30MHz 0.1dB Gain Flatness
600V/µs Slew Rate

♦ Single 3.3V/5.0V Operation
♦ Rail-to-Rail Outputs
♦ Input Common-Mode Range Extends Beyond V

EE

♦ Low Differential Gain/Phase: 0.02%/0.02°
♦ Low Distortion at 5MHz:

-78dBc SFDR

-75dB Total Harmonic Distortion

♦ High Output Drive: ±120mA
♦ 400µA Shutdown Capability (MAX4018)
♦ High Output Impedance in Off State (MAX4018)
♦ Space-Saving SOT23-5, µMAX, or QSOP Packages

MAX4012/MAX4016/MAX4018/MAX4020

Low-Cost, High-Speed, SOT23, Single-Supply

Op Amps with Rail-to-Rail Outputs

________________________________________________________________

Maxim Integrated Products

1

V

EE

IN-

IN+

1

5

V

CC

OUT

MAX4012

SOT23-5

TOP VIEW

2

3

4

_________________Pin Configurations

R

O

50Ω

IN

V

OUT

ZO = 50Ω

UNITY-GAIN LINE DRIVER

(R

L

= RO + RTO)

R

F

24Ω

R

TO

50Ω

R

TIN

50Ω

MAX4012

__________Typical Operating Circuit

19-1246; Rev 0; 7/97

______________Ordering Information

Ordering Information continued at end of data sheet.

Pin Configurations continued at end of data sheet.

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

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone]
For small orders, phone [phone] ext. 3468.

PART

TEMP.

RANGE

PIN-

PACKAGE

5 SOT23-5

MAX4012EUK

-40°C to +85°C

SOT
TOP

MARK

ABZP

8 SO

MAX4016ESA

-40°C to +85°C —
8 µMAXMAX4016EUA -40°C to +85°C —

MAX4012/MAX4016/MAX4018/MAX4020

Low-Cost, High-Speed, SOT23, Single-Supply
Op Amps with Rail-to-Rail Outputs

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= +5V, VEE= 0V, EN_ = +5V, RL= ∞to VCC/ 2, V

OUT

= VCC/ 2, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values

are at T

A

= +25°C.) (Note 1)

Supply Voltage (V

CC

to VEE)................................................+12V

IN_-, IN_+, OUT_, EN_.....................(V

EE

- 0.3V) to (VCC+ 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 SO (derate 5.9mW/°C above +70°C).................471mW

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

14-Pin SO (derate 8.3mW/°C above +70°C)...............667mW

16-Pin QSOP (derate 8.3mW/°C above +70°C)..........667mW

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

Storage Temperature Range.............................-65°C to +150°C

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

Guaranteed by CMRR test

(V

EE

- 0.2V) ≤ V

CM

≤ (V

CC

- 2.25V)

Any channels for MAX4016/MAX4018/
MAX4020

(Note 2)
(Note 2)
Differential mode (-1V ≤ VIN≤ +1V)

CONDITIONS

µV/°C8TC

VOS

Input Offset Voltage
Temperature Coefficient

mV4 20V

OS

V

VEE- V

CC

-

0.20 2.25

V

CM

Input Common-Mode
Voltage Range

Input Offset Voltage (Note 2)

dBA

VOL

Open-Loop Gain (Note 2)

dB70 100CMRRCommon-Mode Rejection Ratio

mV±1Input Offset Voltage Matching

µA5.4 20I

B

Input Bias Current

µA0.1 20I

OS

Input Offset Current

kΩ

70

R

IN

Input Resistance

UNITSMIN TYP MAXSYMBOLPARAMETER

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 at 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.

Common mode (-0.2V ≤ VCM≤ +2.75V)

MΩ

3

0.25V ≤ V

OUT

≤ 4.75V, RL= 2kΩ 61

0.5V ≤ V

OUT

≤ 4.5V, RL= 150Ω 52 59

1.0V ≤ V

OUT

≤ 4V, RL= 50Ω 57

VV

OUT

Output Voltage Swing
(Note 2)

RL= 2kΩ

0.06

0.06

RL= 150Ω

0.30

0.30

0.6 1.5

0.6 1.5

VCC- V

OH

VOL- V

EE

VCC- V

OH

VOL- V

EE

VCC- V

OH

VOL- V

EE

RL= 75Ω
RL= 75Ω

to ground

1.1 2.0VCC- V

OH

0.05 0.50VOL- V

EE

mAOutput Current ±100 ±120

±150

8

RL= 20Ω to VCCor V

EE

Sinking or sourcing

I

OUT

R

OUT

I

SC

Open-Loop Output Resistance

Output Short-Circuit Current

Ω

mA

MAX4012/MAX4016/MAX4018/MAX4020

Low-Cost, High-Speed, SOT23, Single-Supply

Op Amps with Rail-to-Rail Outputs

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5V, VEE= 0V, EN_ = +5V, RL= ∞to VCC/ 2, V

OUT

= VCC/ 2, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values

are at T

A

= +25°C.) (Note 1)

VCC= 5V, VEE= 0V, VCM= +2.0V
VCC= 5V, VEE= -5V, VCM= 0V

VCCto V

EE

CONDITIONS

dB

46 57

PSRR

Power-Supply Rejection Ratio
(Note 3)

54 66

V3.15 11.0V

S

Operating Supply-Voltage
Range

UNITSMIN TYP MAXSYMBOLPARAMETER

VCC= 3.3V, VEE= 0V, VCM= +0.90V 45

EN_ = 0V, 0V ≤ V

OUT

≤ 5V (Note 4)

kΩ

28 35R

OUT (OFF)

Disabled Output Resistance

VVCC- 2.6V

IL

EN_ Logic-Low Threshold

VV

CC

- 1.6V

IH

EN_ Logic-High Threshold

0.5

EN_ = 5V µA0.5 10I

IH

EN_ Logic Input High Current

Enabled

mA

5.5 7.0

I

S

Quiescent Supply Current
(per Amplifier)

MAX4018, disabled (EN_ = 0V) 0.40 0.55

(VEE+ 0.2V) ≤ EN_ ≤ V

CC

µA

200 300

I

IL

EN_ Logic Input Low Current

EN_ = 0V

MAX4012/MAX4016/MAX4018/MAX4020

Low-Cost, High-Speed, SOT23, Single-Supply
Op Amps with Rail-to-Rail Outputs

4 _______________________________________________________________________________________

Note 1: The MAX4012EUT is 100% production tested at TA= +25°C. Specifications over temperature limits are guaranteed by

design.

Note 2: Tested with V

CM

= +2.5V.

Note 3: PSR for single +5V supply tested with V

EE

= 0V, VCC= +4.5V to +5.5V; for dual ±5V supply with VEE= -4.5V to -5.5V,

V

CC

= +4.5V to +5.5V; and for single +3.3V supply with VEE= 0V, VCC= +3.15V to +3.45V.

Note 4: Does not include the external feedback network’s impedance.
Note 5: Guaranteed by design.

AC ELECTRICAL CHARACTERISTICS

(VCC= +5V, VEE= 0V, VCM= 2.5V, EN_ = +5V, RF= 24Ω, RL= 100Ω to VCC/ 2, V

OUT

= VCC/ 2, A

VCL

= +1, TA= +25°C, unless

otherwise noted.)

PARAMETER SYMBOL MIN TYP MAX UNITS

Bandwidth for 0.1dB Gain
Flatness

BW

0.1dB

6 30 MHz

Large-Signal -3dB Bandwidth BW

LS

140 MHz

Slew Rate SR 600 V/µs
Settling Time to 0.1% t

S

45 ns

Rise/Fall Time tR, t

F

1 ns

-78
dBc

Small-Signal -3dB Bandwidth BW

SS

200

MHz

150

Harmonic Distortion HD

-82

-75 dB

Two-Tone, Third-Order
Intermodulation Distortion

IP3 35 dBc

Input 1dB Compression Point 11 dBm
Differential Phase Error DP 0.02 degrees
Differential Gain Error DG 0.02 %
Input Noise-Voltage Density e

n

10

nV/√Hz

Input Noise-Current Density i

n

6

pA/√Hz

Input Capacitance C

IN

1 pF

Disabled Output Capacitance C

OUT (OFF)

2 pF

Output Impedance Z

OUT

6

Ω

Amplifier Enable Time t

ON

100 ns

CONDITIONS

V

OUT

= 2Vp-p

V

OUT

= 2V step

V

OUT

= 2V step

f1 = 10.0MHz, f2 = 10.1MHz, V

OUT

= 1Vp-p

V

OUT

= 100mVp-p

fC= 5MHz,
V

OUT

= 2Vp-p

fC= 10MHz, A

VCL

= +2
NTSC, RL= 150Ω
NTSC, RL= 150Ω

V

OUT

= 20mVp-p

f = 10kHz
f = 10kHz

MAX4018, EN_ = 0V
f = 10MHz
MAX4018

MAX4012
MAX4016/MAX4018/

MAX4020

V

OUT

= 20mVp-p (Note 5)

2nd harmonic
3rd harmonic

Total harmonic
distortion

Spurious-Free Dynamic
Range

SFDR -78 dBcfC= 5MHz, V

OUT

= 2Vp-p

Amplifier Disable Time t

OFF

1 µsMAX4018

Amplifier Gain Matching 0.1 dB

MAX4016/MAX4018/MAX4020,
f = 10MHz, V

OUT

= 20mVp-p

Amplifier Crosstalk X

TALK

-95 dB

MAX4016/MAX4018/MAX4020,
f = 10MHz, V

OU

T

= 2Vp-p, RS= 50Ω to ground

MAX4012/MAX4016/MAX4018/MAX4020

Low-Cost, High-Speed, SOT23, Single-Supply

Op Amps with Rail-to-Rail Outputs

_______________________________________________________________________________________

5

4

-6
100k 1M 10M 100M 1G

MAX4012

SMALL-SIGNAL GAIN vs. FREQUENCY

(A

VCL

= +1)

-4

MAX4012-01

FREQUENCY (Hz)

GAIN (dB)

-2

0

2

3

-5

-3

-1

1

A

VCL

= +1

V

OUT

= 20mVp-p

3

-7
100k 1M 10M 100M 1G

MAX4016/18/20

SMALL-SIGNAL GAIN vs. FREQUENCY

(A

VCL

= +1)

-5

MAX4012-02

FREQUENCY (Hz)

GAIN (dB)

-3

-1

1

2

-6

-4

-2

0

A

VCL

= +1

V

OUT

= 20mVp-p

9

-1
100k 1M 10M 100M 1G

MAX4012

SMALL-SIGNAL GAIN vs. FREQUENCY

(A

VCL

= +2)

1

MAX4012-03

FREQUENCY (Hz)

GAIN (dB)

3

5

7

8

0

2

4

6

A

VCL

= +2

V

OUT

= 20mVp-p

9

-1
100k 1M 10M 100M 1G

MAX4016/18/20

SMALL-SIGNAL GAIN vs. FREQUENCY

(A

VCL

= +2)

1

MAX4012-04

FREQUENCY (Hz)

GAIN (dB)

3

5

7

8

0

2

4

6

A

VCL

= +2

V

OUT

= 20mVp-p

0.5

-0.5

0.1M 1M 10M 100M 1G

MAX4016/18/20

GAIN FLATNESS vs. FREQUENCY

-0.3

MAX4012-07

FREQUENCY (Hz)

GAIN (dB)

-0.1

0.1

0.3

0.4

-0.4

-0.2

0

0.2

A

VCL

= +1

V

OUT

= 20mVp-p

4

-6
100k 1M 10M 100M 1G

LARGE-SIGNAL GAIN vs. FREQUENCY

-4

MAX4012-05

FREQUENCY (Hz)

GAIN (dB)

-2

0

2

3

-5

-3

-1

1

V

OUT

= 2Vp-p

V

OUT BIAS

= 1.75V

0.7

-0.3

0.1M 1M 10M 100M 1G

MAX4012

GAIN FLATNESS vs. FREQUENCY

-0.1

MAX4012-06

FREQUENCY (Hz)

GAIN (dB)

0.1

0.3

0.5

0.6

-0.2

0

0.2

0.4

A

VCL

= +1

V

OUT

= 20mVp-p

50

-150
100k 1M 10M 100M 1G

MAX4016/18/20

CROSSTALK vs. FREQUENCY

-110

MAX4212-08

FREQUENCY (Hz)

CROSSTALK (dB)

-70

-30

10

30

-130

-90

-50

-10

RS = 50Ω

1000

0.1

0.1M 1M 10M 100M

CLOSED-LOOP OUTPUT IMPEDANCE

vs. FREQUENCY

MAX4012-09

FREQUENCY (Hz)

IMPEDANCE (Ω)

100

1

10

__________________________________________Typical Operating Characteristics

(VCC= +5V, VEE= 0V, A

VCL

= +1, RF= 24Ω, RL= 100Ω to VCC/ 2, TA = +25°C, unless otherwise noted.)

MAX4012/MAX4016/MAX4018/MAX4020

Low-Cost, High-Speed, SOT23, Single-Supply
Op Amps with Rail-to-Rail Outputs

6 _______________________________________________________________________________________

0

-100
100k 1M 10M 100M

HARMONIC DISTORTION

vs. FREQUENCY (A

VCL

= +1)

-80

MAX4012-10

FREQUENCY (Hz)

HARMONIC DISTORTION (dBc)

-60

-40

-20

-10

-90

-70

-50

-30

V

OUT

= 2Vp-p

A

VCL

= +1

2ND HARMONIC

3RD HARMONIC

0

-100

100k 1M 10M 100M

HARMONIC DISTORTION

vs. FREQUENCY (A

VCL

= +2)

-80

MAX4012-11

FREQUENCY (Hz)

HARMONIC DISTORTION (dBc)

-60

-40

-20

-10

-90

-70

-50

-30

V

OUT

= 2Vp-p

A

VCL

= +2

2ND HARMONIC

3RD HARMONIC

0

-100
100k 1M 10M 100M

HARMONIC DISTORTION

vs. FREQUENCY (A

VCL

= +5)

-80

MAX4012-12

FREQUENCY (Hz)

HARMONIC DISTORTION (dBc)

-60

-40

-20

-10

-90

-70

-50

-30

V

OUT

= 2Vp-p

A

VCL

= +5

2ND HARMONIC

3RD
HARMONIC

0

-10

-20

-30

-60

-70

-90

-80

-40

-50

-100

MAX4012-13

LOAD (Ω)

0 200 400 600 800 1000

HARMONIC DISTORTION

vs. LOAD

HARMONIC DISTORTION (dBc)

f = 5MHz
V

OUT

= 2Vp-p

3rd HARMONIC

2rd HARMONIC

0

-100
100k 1M 10M 100M

COMMON-MODE REJECTION

vs. FREQUENCY

-80

MAX4012-16

FREQUENCY (Hz)

CMR (dB)

-60

-40

-20

-10

-90

-70

-50

-30

0

-10

-20

-30

-60

-70

-90

-80

-40

-50

-100

MAX4012-14

OUTPUT SWING (Vp-p)

0.5

1.0

1.5 2.0

HARMONIC DISTORTION

vs. OUTPUT SWING

HARMONIC DISTORTION (dBc)

fO = 5MHz

3RD HARMONIC

2ND HARMONIC

-0.01
0 100

0 100

DIFFERENTIAL GAIN AND PHASE

-0.01

0.00

0.00

0.01

0.01

0.02

0.02

0.03

0.03

IRE

IRE

DIFF. PHASE (deg)

DIFF. GAIN (%)

MAX4012-15

VCM = +1.35V

VCM = +1.35V

20

-80
100k 1M 10M 100M

POWER-SUPPLY REJECTION

vs. FREQUENCY

-60

MAX4012-17

FREQUENCY (Hz)

POWER-SUPPLY REJECTION (dB)

-40

-20

0

10

-70

-50

-30

-10

4.5

4.0

3.5

2.5

2.0

1.5

3.0

1.0

MAX4012-18

LOAD RESISTANCE (Ω)

25 50 75 100 125 150

OUTPUT SWING

vs. LOAD RESISTANCE

OUTPUT SWING (Vp-p)

A

VCL

= +2

RL to VCC/2

RL to GROUND

____________________________Typical Operating Characteristics (continued)

(VCC= +5V, VEE= 0V, A

VCL

= +1, RF= 24Ω, RL= 100Ω to VCC/ 2, TA = +25°C, unless otherwise noted.)

MAX4012/MAX4016/MAX4018/MAX4020

Low-Cost, High-Speed, SOT23, Single-Supply

Op Amps with Rail-to-Rail Outputs

_______________________________________________________________________________________ 7

IN

(50mV/

div)

OUT

(25mV/

div)

VOLTAGE

SMALL-SIGNAL PULSE RESPONSE

(A

VCL

= +1)

MAX4012-19

TIME (20ns/div)

V

CM

= +2.5V, RL = 100Ω to GROUND

IN

(25mV/

div)

OUT

(25mV/

div)

VOLTAGE

SMALL-SIGNAL PULSE RESPONSE

(A

VCL

= +2)

MAX4012-20

TIME (20ns/div)

VCM = +1.25V, RL = 100Ω to GROUND

IN

(50mV/

div)

OUT

(25mV/

div)

VOLTAGE

SMALL-SIGNAL PULSE RESPONSE

(C

L

= 5pF, A

VCL

= +1)

MAX4012-21

TIME (20ns/div)

V

CM

= +1.75V, RL = 100Ω to GROUND

IN

(1V/div)

OUT

(1V/div)

VOLTAGE

LARGE-SIGNAL PULSE RESPONSE

(A

VCL

= +1)

MAX4012-22

TIME (20ns/div)

V

CM

= +1.75V, RL = 100Ω to GROUND

100

10

1

1 10 1k 10M1M

VOLTAGE-NOISE DENSITY

vs. FREQUENCY

MAX4012-25

FREQUENCY (Hz)

NOISE (nV/√Hz)

100 10k 100k

IN

(500mV/

div)

OUT

(500mV/

div)

VOLTAGE

LARGE-SIGNAL PULSE RESPONSE

(A

VCL

= +2)

MAX4012-23

TIME (20ns/div)

V

CM

= 0.9V, RL = 100Ω to GROUND

IN

(1V/

div)

OUT

(500mV/

div)

VOLTAGE

LARGE-SIGNAL PULSE RESPONSE

(C

L

= 5pF, A

VCL

= +2)

MAX4012-24

TIME (20ns/div)

V

CM

= +1.75V, RL = 100Ω to GROUND

10

1

1 10 1k 10M1M

CURRENT-NOISE DENSITY

vs. FREQUENCY

MAX4012-26

FREQUENCY (Hz)

NOISE (pA/√Hz)

100 10k 100k

EN_

5.0V
(ENABLE)

0V
(DISABLE)

1V

0V

OUT

ENABLE RESPONSE TIME

MAX4012-27

TIME (1µs/div)

VIN = +1.0V

____________________________Typical Operating Characteristics (continued)

(VCC= +5V, VEE= 0V, A

VCL

= +1, RF= 24Ω, RL= 100Ω to VCC/ 2, TA = +25°C, unless otherwise noted.)

MAX4012/MAX4016/MAX4018/MAX4020

Low-Cost, High-Speed, SOT23, Single-Supply
Op Amps with Rail-to-Rail Outputs

8 _______________________________________________________________________________________

70

50

60

40

30

20

MAX4012-28

LOAD RESISTANCE (Ω)

0 200 400 600 800 1k

OPEN-LOOP GAIN

vs. LOAD RESISTANCE

OPEN-LOOP GAIN (dB)

400
350
300
250

150

50

100

200

0

MAX4012-29

LOAD RESISTANCE (Ω)

1000 200 500400300 600

CLOSED-LOOP BANDWIDTH

vs. LOAD RESISTANCE

CLOSED-LOOP BANDWIDTH (MHz)

10

-90
100k 10M 100M1M

OFF ISOLATION vs. FREQUENCY

-80

MAX4012-30

FREQUENCY (Hz)

OFF ISOLATION (dB)

-70

-60

-50

-40

-30

-20

-10

0

7

6

4

5

3

MAX4012-31

TEMPERATURE (°C)

-25-50 0 755025 100

SUPPLY CURRENT

vs. TEMPERATURE

SUPPLY CURRENT (mA)

10

8

6

4

2

0

MAX4012-34

SUPPLY VOLTAGE (V)

43 5 6 7 8 9 10 11

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY CURRENT (mA)

6.0

5.5

4.5

5.0

4.0

MAX4012-32

TEMPERATURE (°C)

-25-50 0 755025 100

INPUT BIAS CURRENT

vs. TEMPERATURE

INPUT BIAS CURRENT (µA)

0.20

0.16

0.12

0.04

0.08

0

MAX4012-33

TEMPERATURE (°C)

-25-50 0 755025 100

INPUT OFFSET CURRENT

vs. TEMPERATURE

INPUT OFFSET CURRENT (µA)

5

4

3

1

2

0

MAX4012-35

TEMPERATURE (°C)

-25-50 0 755025 100

INPUT OFFSET VOLTAGE

vs. TEMPERATURE

INPUT OFFSET VOLTAGE (mV)

5.0

4.8

4.6

4.2

4.4

4.0

MAX4012-36

TEMPERATURE (°C)

-25-50 0 755025 100

OUTPUT VOLTAGE SWING

vs. TEMPERATURE

VOLTAGE SWING (Vp-p)

RL = 150Ω TO V

CC

/ 2

____________________________Typical Operating Characteristics (continued)

(VCC= +5V, VEE= 0V, A

VCL

= +1, RF= 24Ω, RL= 100Ω to VCC/ 2, TA = +25°C, unless otherwise noted.)

PIN

MAX4012/MAX4016/MAX4018/MAX4020

Low-Cost, High-Speed, SOT23, Single-Supply

Op Amps with Rail-to-Rail Outputs

_______________________________________________________________________________________ 9

______________________________________________________________Pin Description

Amplifier A Noninverting Input—
Amplifier B Output—
Amplifier B Inverting Input—
Amplifier B Noninverting Input—
Amplifier C Output—

Inverting Input4
Positive Power Supply5
Amplifier A Output—
Amplifier A Inverting Input—

Noninverting Input3

Negative Power Supply or Ground (in
single-supply operation)

2

Amplifier Output1

No Connect. Not internally connected.
Tie to ground or leave open.

—

FUNCTION

3
7
6
5
8

—

4
1
2

—

11

—

—

3
7
6
5

—

—

8
1
2

—

4

—

—

5
10
11
12
16

—

4

7

6

—

13

—

8, 9

5
8

9
10
14

—

4

7

6

—

11

—

—

3
7
6
5

10

—

4
1
2

—

13

—

8, 9

INA+

OUTB

INB-

INB+

OUTC

IN-

V

CC

OUTA

INA-

IN+

V

EE

OUT

N.C.

NAME

Amplifier C Inverting Input— 9— 1513 11 INC­Amplifier C Noninverting Input— 10— 1412 12 INC+
Amplifier D Output— 14— —— 16 OUTD
Amplifier D Inverting Input— 13— —— 15 IND­Amplifier D Noninverting Input— 12— —— 14 IND+
Enable Amplifier— —— —— — EN
Enable Amplifier A— —— 11 — ENA
Enable Amplifier B— —— 33 — ENB
Enable Amplifier C— —— 22 — ENC

MAX4012

SOT23-5

MAX4020

MAX4016
SO/µMAX

MAX4018

SO QSOP SO QSOP

PIN

MAX4012/MAX4016/MAX4018/MAX4020

_______________Detailed Description

The MAX4012/MAX4016/MAX4018/MAX4020 are sin­gle-supply, rail-to-rail, voltage-feedback amplifiers that
employ current-feedback techniques to achieve
600V/µs slew rates and 200MHz bandwidths. Excellent
harmonic distortion and differential gain/phase perfor­mance make these amplifiers an ideal choice for a wide
variety of video and RF signal-processing applications.

The output voltage swing comes to within 50mV of each
supply rail. Local feedback around the output stage
assures low open-loop output impedance to reduce
gain sensitivity to load variations. This feedback also
produces demand-driven current bias to the output
transistors for ±120mA drive capability, while constrain­ing total supply current to less than 7mA. The input
stage permits common-mode voltages beyond the nega­tive supply and to within 2.25V of the positive supply rail.

__________Applications Information

Choosing Resistor Values

Unity-Gain Configuration

The MAX4012/MAX4016/MAX4018/MAX4020 are inter­nally compensated for unity gain. When configured for
unity gain, the devices require a 24Ω resistor (RF) in
series with the feedback path. This resistor improves
AC response by reducing the Q of the parallel LC cir-

cuit formed by the parasitic feedback capacitance and
inductance.

Inverting and Noninverting Configurations

Select the gain-setting feedback (RF) and input (RG)
resistor values to fit your application. Large resistor val­ues increase voltage noise and interact with the amplifi­er’s input and PC board capacitance. This can
generate undesirable poles and zeros and decrease
bandwidth or cause oscillations. For example, a nonin­verting gain-of-two configuration (RF= RG) using 1kΩ
resistors, combined with 1pF of amplifier input capaci­tance and 1pF of PC board capacitance, causes a pole
at 159MHz. Since this pole is within the amplifier band­width, it jeopardizes stability. Reducing the 1kΩ resis­tors to 100Ω extends the pole frequency to 1.59GHz,
but could limit output swing by adding 200Ω in parallel
with the amplifier’s load resistor. Table 1 shows sug­gested feedback, gain resistors, and bandwidth for
several gain values in the configurations shown in
Figures 1a and 1b.

Layout and Power-Supply Bypassing

These amplifiers operate from a single +3.3V to +11V
power supply or from dual supplies to ±5.5V. For single­supply operation, bypass VCCto ground with a 0.1µF
capacitor as close to the pin as possible. If operating with
dual supplies, bypass each supply with a 0.1µF capacitor.

Low-Cost, High-Speed, SOT23, Single-Supply
Op Amps with Rail-to-Rail Outputs

10 ______________________________________________________________________________________

IN

R

G

V

OUT

= [1+ (RF / RG)] V

IN

R

F

R

TO

R

TIN

R

O

V

OUT

MAX40_ _

Figure 1a. Noninverting Gain Configuration Figure 1b. Inverting Gain Configuration

MAX40_ _

V

R

F

= -(RF / RG) V

OUT

R

IN

R

TIN

G

R

S

R

TO

IN

V

OUT

R

O

Maxim recommends using microstrip and stripline tech­niques to obtain full bandwidth. To ensure that the PC
board does not degrade the amplifier’s performance,
design it for a frequency greater than 1GHz. Pay care­ful attention to inputs and outputs to avoid large para­sitic capacitance. Whether or not you use a constant­impedance board, observe the following guidelines
when designing the board:

• Don’t use wire-wrap boards because they are too
inductive.

• Don’t use IC sockets because they increase parasitic
capacitance and inductance.

• Use surface-mount instead of through-hole compo­nents for better high-frequency performance.

• Use a PC board with at least two layers; it should be
as free from voids as possible.

• Keep signal lines as short and as straight as possi­ble. Do not make 90° turns; round all corners.

Rail-to-Rail Outputs,

Ground-Sensing Input

The input common-mode range extends from
(VEE- 200mV) to (VCC- 2.25V) with excellent common­mode rejection. Beyond this range, the amplifier output
is a nonlinear function of the input, but does not under­go phase reversal or latchup.

The output swings to within 60mV of either power­supply rail with a 2kΩ load. The input ground-sensing
and the rail-to-rail output substantially increase the
dynamic range. With a symmetric input in a single +5V
application, the input can swing 2.95Vp-p, and the out­put can swing 4.9Vp-p with minimal distortion.

Enable Input and Disabled Output

The enable feature (EN_) allows the amplifier to be
placed in a low-power, high-output-impedance state.
Typically, the EN_ logic low input current (IIL) is small.
However, as the EN voltage (VIL) approaches the nega­tive supply rail, IILincreases (Figure 2). A single resis­tor connected as shown in Figure 3 prevents the rise in
the logic-low input current. This resistor provides a
feedback mechanism that increases VILas the logic
input is brought to VEE. Figure 4 shows the resulting
input current (IIL).

When the MAX4018 is disabled, the amplifier’s output
impedance is 35kΩ. This high resistance and the low
2pF output capacitance make this part ideal in
RF/video multiplexer or switch applications. For larger
arrays, pay careful attention to capacitive loading. See
the

Output Capacitive Loading and Stability

section for

more information.

MAX4012/MAX4016/MAX4018/MAX4020

Low-Cost, High-Speed, SOT23, Single-Supply

Op Amps with Rail-to-Rail Outputs

______________________________________________________________________________________ 11

RF(Ω)

24 500

RG(Ω)

∞

500

COMPONENT

RS(Ω)

— 0

R

TIN

(Ω)

49.9 56

Small-Signal -3dB Bandwidth (MHz) 200 90

RTO(Ω)

49.9 49.9

Table 1. Recommended Component Values

Note: RL= RO+ RTO; R

TIN

and RTOare calculated for 50Ω applications. For 75Ω systems, RTO= 75Ω; calculate R

TIN

from the

following equation:

500
500

—

49.9

105

49.9

500
250

0

62

60

49.9

500
124

—

49.9

25

49.9

500
100

0

100

33

49.9

500

56
—

49.9

11

49.9

500

50

0

∞

25

49.9

500

20
—

49.9

6

49.9

GAIN (V/V)

1200

50

0

∞

10

49.9

+1 -1 +2 -2 +5 -5 +10 -10 +25 -25

R =

TIN

75

75

1-

R

G

Ω

MAX4012/MAX4016/MAX4018/MAX4020

To implement the mux function, the outputs of multiple
amplifiers can be tied together, and only the amplifier
with the selected input will be enabled. All of the other
amplifiers will be placed in the low-power shutdown
mode, with their high output impedance presenting
very little load to the active amplifier output. For gains
of +2 or greater, the feedback network impedance of
all the amplifiers used in a mux application must be
considered when calculating the total load on the
active amplifier output

Output Capacitive Loading and Stability

The MAX4012/MAX4016/MAX4018/MAX4020 are opti­mized for AC performance. They are not designed to
drive highly reactive loads, which decreases phase
margin and may produce excessive ringing and oscilla­tion. Figure 5 shows a circuit that eliminates this prob­lem. Figure 6 is a graph of the optimal isolation resistor
(RS) vs. capacitive load. Figure 7 shows how a capaci­tive load causes excessive peaking of the amplifier’s
frequency response if the capacitor is not isolated from
the amplifier by a resistor. A small isolation resistor
(usually 20Ω to 30Ω) placed before the reactive load
prevents ringing and oscillation. At higher capacitive
loads, AC performance is controlled by the interaction
of the load capacitance and the isolation resistor.
Figure 8 shows the effect of a 27Ω isolation resistor on
closed-loop response.

Coaxial cable and other transmission lines are easily
driven when properly terminated at both ends with their
characteristic impedance. Driving back-terminated
transmission lines essentially eliminates the line’s
capacitance.

Low-Cost, High-Speed, SOT23, Single-Supply
Op Amps with Rail-to-Rail Outputs

12 ______________________________________________________________________________________

OUT

IN-

EN_

IN+

10k

ENABLE

MAX40_ _

Figure 2. Enable Logic-Low Input Current vs. V

IL

Figure 4. Enable Logic-Low Input Current vs. V

IL

with 10k

Ω

Series Resistor

Figure 3. Circuit to Reduce Enable Logic-Low Input Current

20

0

-20

-40

-60

-80

-100

INPUT CURRENT (µA)

-120

-140

-160
0 50 100 150 300 350 500

0

-1

-2

-3

-4

-5

-6

INPUT CURRENT (µA)

-7

-8

-9

-10
0 50 100 150 300 350 500

200 250 400 450

mV ABOVE V

200 250 400 450

mV ABOVE V

EE

EE

MAX4012/MAX4016/MAX4018/MAX4020

Low-Cost, High-Speed, SOT23, Single-Supply

Op Amps with Rail-to-Rail Outputs

______________________________________________________________________________________ 13

R

G

R

F

R

ISO

50Ω

C

L

V

OUT

V

IN

R

TIN

MAX40_ _

Figure 5. Driving a Capacitive Load through an Isolation Resistor

30

25

20

5

10

15

0

CAPACITIVE LOAD (pF)

500 100 200150 250

ISOLATION RESISTANCE, R

ISO

(Ω)

Figure 6. Capacitive Load vs. Isolation Resistance

6

-4
100k 10M 100M1M 1G

-2

FREQUENCY (Hz)

GAIN (dB)

0

2

4

5

-3

-1

1

3

CL = 10pF

CL = 15pF

CL = 5pF

Figure 7. Small-Signal Gain vs. Frequency with Load
Capacitance and No Isolation Resistor

3

-7
100k 10M 100M1M 1G

-5

FREQUENCY (Hz)

GAIN (dB)

-3

-1

1

2

-6

-4

-2

0

CL = 68pF

R

ISO

= 27Ω

CL = 120pF

CL = 47pF

Figure 8. Small-Signal Gain vs. Frequency with Load
Capacitance and 27

Ω

Isolation Resistor

MAX4012/MAX4016/MAX4018/MAX4020

Low-Cost, High-Speed, SOT23, Single-Supply
Op Amps with Rail-to-Rail Outputs

14 ______________________________________________________________________________________

TOP VIEW

14
13
12

11
10

9
8

1
2
3

4
5
6
7

OUTC
INC-

INC+
V

EE

V

CC

ENB

ENC

ENA

MAX4018

INB+
INB­OUTB

OUTA

INA-

INA+

SO

14
13
12

11
10

9
8

1
2
3

4
5
6
7

OUTD
IND-

IND+
V

EE

V

CC

INA+

INA-

OUTA

MAX4020

INC+
INC­OUTC

OUTB

INB-

INB+

SO

16
15
14
13

12
11
10

9

1
2
3
4
5
6
7
8

OUTC
INC­INC+
V

EE

INB+
INB­OUTB
N.C.

ENA
ENC
ENB

V

CC

INA+
INA-

OUTA

N.C.

MAX4018

QSOP

16
15
14
13

12
11
10

9

1

2
3
4

5

6
7
8

OUTD
IND­IND+
V

EE

INC+
INC­OUTC
N.C.

OUTA

INA-

INA+

V

CC

INB+

INB-

OUTB

N.C.

MAX4020

QSOP

INB-

INB+

V

EE

1
2

8

7

V

CC

OUTB

INA-

INA+

OUTA

SO/µMAX

3

4

6

5

MAX4016

_____________________________________________Pin Configurations (continued)

MAX4012/MAX4016/MAX4018/MAX4020

Low-Cost, High-Speed, SOT23, Single-Supply

Op Amps with Rail-to-Rail Outputs

______________________________________________________________________________________ 15

362MAX4020

299MAX4018

190MAX4016

95MAX4012

TRANSISTOR

COUNT

PART

___________________Chip Information_Ordering Information (continued)

PART

TEMP.

RANGE

SOT
TOP

MARK

________________________________________________________Package Information

PIN-

PACKAGE

14 SO
16 QSOP
14 SO
16 QSOP

MAX4018ESD

-40°C to +85°C
MAX4018EEE -40°C to +85°C
MAX4020ESD

-40°C to +85°C
MAX4020EEE -40°C to +85°C

—
—
—
—

SOT5L.EPS

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.

16

____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

MAX4012/MAX4016/MAX4018/MAX4020

Low-Cost, High-Speed, SOT23, Single-Supply
Op Amps with Rail-to-Rail Outputs

___________________________________________Package Information (continued)

8LUMAXD.EPS

QSOP.EPS