MAXIM MAX4412, MAX4413 Technical data

19-1831; Rev 1; 1/09

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz

Single-Supply Op Amps with Rail-to-Rail Outputs

General Description

The MAX4412 single and MAX4413 dual operational
amplifiers are unity-gain-stable devices that combine
high-speed performance, low supply current, and ultra­small packaging. Both devices operate from a single
+2.7V to +5.5V supply, have rail-to-rail outputs, and
exhibit a common-mode input voltage range that
extends from 100mV below ground to within +1.5V of
the positive supply rail.

The MAX4412/MAX4413 achieve a 500MHz -3dB band­width and a 140V/µs slew rate while consuming only

1.7mA of supply current per amplifier. This makes the
MAX4412/MAX4413 ideal for low-power/low-voltage,
high-speed portable applications such as video, com­munications, and instrumentation.

For systems requiring tighter specifications, Maxim
offers the MAX4414–MAX4419 family of operational
amplifiers. The MAX4414–MAX4419 are laser trimmed
versions of the MAX4412/MAX4413 and include com­pensated and uncompensated devices.

The MAX4412 is available in ultra-small 5-pin SC70 and
SOT23 packages, while the MAX4413 is available in a
space-saving 8-pin SOT23.

________________________Applications

Battery-Powered Instruments

Portable Communications

Keyless Entry Systems

Cellular Telephones

Video Line Drivers

Baseband Applications

Features

♦ Ultra-Low 1.7mA Supply Current

♦ Low Cost

♦ Single +3V/+5V Operation

♦ High Speed

500MHz -3dB Bandwidth
50MHz 0.1dB Gain Flatness

140V/µs Slew Rate

♦ Rail-to-Rail Outputs

♦ Input Common-Mode Range Extends Beyond V

♦ Low Differential Gain/Phase: 0.01%/0.03°

♦ Low Distortion at 5MHz

-93dBc SFDR

0.003% Total Harmonic Distortion

♦ Ultra-Small SC70 and SOT23 Packages

Ordering Information

PART TEMP RANGE

MAX4412EXK-T -40°C to +85°C

MAX4412EUK-T -40°C to +85°C

MAX4413EKA-T -40°C to +85°C

-Denotes a package containing lead(Pb).

T = Tape and reel.

PIN-

PACKAGE

5 SC70

5 SOT23

8 SOT23

TOP

M ARK

ABH

ADOL

AADR

MAX4412/MAX4413

EE

Typical Operating Characteristic

SUPPLY CURRENT vs.

SUPPLY VOLTAGE (PER AMPLIFER)

2.0

1.9

1.8

1.7

1.6

1.5

SUPPLY CURRENT (mA)

1.4

1.3

1.2

2.7 3.5 3.93.1
SUPPLY VOLTAGE (V)

________________________________________________________________

4.3

4.7 5.1 5.5

MAX4412 toc01

TOP VIEW

1

OUT

V

2

EE

IN+

MAX4412

34

SC70/SOT23

Pin Configurations

1

5 V

OUTA

CC

2

MAX4413

3

INA+

IN-

4

EE

SOT23

Maxim Integrated Products

87V

6

5

CC

OUTBINA-

INB-

INB+V

1

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.

MAX4412/MAX4413

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz
Single-Supply Op Amps with Rail-to-Rail Outputs

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= +2.7V to +5.5V, VCM= VCC/2 - 0.75V, VEE= 0, 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)

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

Differential Input Voltage ....................................................±2.5V

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

CC

+ 0.3V) to (VEE- 0.3V)

Current into Input Pins ......................................................±20mA

Output Short-Circuit Duration to V

CC

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

Continuous Power Dissipation (T

A

= +70°C)

5-Pin SC70 (derate 3.1mW/°C above +70°C)..............247mW

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

8-Pin SOT23 (derate 9.1mW/°C above +70°C)............727mW

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

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

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

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

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Operating Supply Voltage Range V

Quiescent Supply Current
(per amplifier)

Input Common Mode Voltage
Range

Input Offset Voltage V

Input Offset Voltage Temperature
Coefficient

Input Offset Voltage Matching MAX4413 ±1mV

Input Bias Current I

Input Offset Current I

Input Resistance R

Common Mode Rejection Ratio CMRR VEE - 0.1V < VCM < VCC - 1.5V 60 94 dB

Open-Loop Gain A

TC

V

S

I

S

CM

OS

VOS

B

OS

IN

VOL

Guaranteed by PSRR test 2.7 5.5 V

VCC = +5V 1.7 3.5

VCC = +3V 1.5

Guaranteed by CMRR test

Differential mode,

-0.04V ≤ (V

Common mode,
V

EE

VCC = +5V

VCC = +3V

IN+

- 0.1V < VCM < VCC - 1.5V

- V

IN-)

+0.2V ≤ V
R

+0.4V ≤ V
R

+1V ≤ V
R

+0.2V ≤ V
R

+0.25V ≤ V
R

+0.5V ≤ V
R

≤ +0.04V

= 10kΩ

L

= 1kΩ

L

= 150Ω

L

= 10kΩ

L

= 1kΩ

L

= 150Ω

L

≤ +4.8V,

OUT

≤ +4.6V,

OUT

≤ +4V,

OUT

≤ +2.8V,

OUT

≤ +2.75V

OUT

≤ +2.5V,

OUT

V

EE

0.1

78 93

68 80

-

0.4 9 mV

1.6 4 μA

0.1 0.7 μA

VCC -

1.5

3 μV/°C

60 kΩ

16 MΩ

65

90

78

62

mA

V

dB

MAX4412/MAX4413

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz

Single-Supply Op Amps with Rail-to-Rail Outputs

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS

(VCC= +5V, VEE= 0, VCM= +1.75V, RL= 1kΩ connected to VCC/2, CL= 5pF, A

VCL

= +1V/V, TA= +25°C, unless otherwise noted.)

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC= +2.7V to +5.5V, VCM= VCC/2 - 0.75V, VEE= 0, 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)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

VCC = +5V

Output Voltage Swing V

OUT

VCC = +3V

Output Current I

Output Short-Circuit Current I

OUT

SC

RL = 20Ω connected to V
Sinking or sourcing ±85 mA

Power Supply Rejection Ratio PSRR VCC = +2.7V to +5.5V, VCM = 0, V

RL = 10kΩ

RL = 1kΩ

R

=

L

150Ω

RL = 10kΩ

RL = 1kΩ

R

=

L

150Ω

or V

C C

VCC - V

OH

- V

V

OL

EE

VCC - V

OH

- V

V

OL

EE

VCC - V

OH

V

- V

OL

EE

VCC - V

OH

- V

V

OL

EE

VCC - V

OH

- V

V

OL

EE

VCC - V

OH

V

- V

OL

EE

, V

= + 5V ±25 ±75 mA

E E

C C

= 2V 60 77 dB

OUT

0.085

0.015

0.105 0.275

0.035 0.125

0.385

0.150

0.06

0.01

0.075

0.025

0.275

0.070

V

Small Signal -3dB Bandwidth BW

Large Signal -3dB Bandwidth BW

Bandwidth for 0.1dB Flatness BW

Slew Rate SR V

Rise/Fall Time t

Settling Time to 0.1% t

Spurious-Free Dynamic Range SFDR

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

V

SS

LS

0.1dB

t

R,

S 1%

F

= 100mV p - p 500 MHz

OU T

V

= 2Vp-p 30 MHz

OUT

V

= 100mVp-p 50

OUT

V

= 2Vp-p 16

OUT

= 2V step 140 V/µs

OUT

V

= 2V step, 10% to 90% 14 ns

OUT

V

= 2V step 100 ns

OUT

VCC = +5V, fC = 5MHz, V

= +3V, fC = 5MHz, V

V

CC

OUT

OUT

= 1Vp-p -84

= 1Vp-p -93

MHz

dBc

MAX4412/MAX4413

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz
Single-Supply Op Amps with Rail-to-Rail Outputs

4 _______________________________________________________________________________________

Note 1: All devices are 100% production tested at TA= +25°C. Specifications over temperature are guaranteed by design.
Note 2: Guaranteed by design.

AC ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5V, VEE= 0, VCM= +1.75V, RL= 1kΩ connected to VCC/2, CL= 5pF, A

VCL

= +1V/V, TA= +25°C, unless otherwise noted.)

2nd Harmonic Distortion

3rd Harmonic Distortion

Total Harmonic Distortion THD

Two-Tone, Third-Order
Intermodulation Distortion

Differential Gain Error DG RL = 150Ω, NTSC

Differential Phase Error DP RL = 150Ω, NTSC

Gain Matching MAX4413, V

Phase Matching MAX4413, V

Input Noise-Voltage Density e

Input Noise-Current Density I

Input Capacitance C

Output Impedance Z

Capacitive Load Drive No sustained oscillations 120 pF

Power-Up 1% Settling Time
(Note 2)

Crosstalk X

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

IP3 f

n

n

IN

OUT

TALK

VCC = +5V, fC = 5MHz, V

V

= +3V, fC = 5MHz, V

CC

VCC = +5V, fC = 5MHz, V

V

= +3V, fC = 5MHz, V

CC

VCC = +5V, fC = 5MHz, V

V

= +3V, fC = 5MHz, V

CC

= 10MHz, f2 = 9.9MHz -67 dBc

1

= 100mVp-p, f ≤ 10MHz 0.1 dB

OUT

= 100mVp-p f ≤ 10MHz 0.1 d egr ees

OUT

f = 10kHz 13 nV/√Hz
f = 10kHz 0.7 p A/√ Hz

f = 1MHz 0.7 Ω

M AX4413, f = 10M H z, V

OUT

OUT

OUT

OUT

OUT

OUT

AV = +1V/V 0.03

= +2V/V 0.01

A

V

AV = +1V/V 0.13

= +2V/V 0.03

A

V

= 2V p -p -82 dB

OU T

= 1Vp-p -84

= 1Vp-p -93

= 1Vp-p -95

= 1Vp-p -95

= 1Vp-p 0.007

= 1Vp-p 0.003

1.8 pF

1.2 100 µs

dBc

dBc

%

%

d egr ees

MAX4412/MAX4413

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz

Single-Supply Op Amps with Rail-to-Rail Outputs

_______________________________________________________________________________________

5

Typical Operating Characteristics

(VCC= +5V, VEE= 0, VCM= +1.75V, A

VCL

= +1V/V, RF= 24Ω, RL= 1kΩ to VCC/2, CL= 5pF, TA= +25°C, unless otherwise noted.)

SUPPLY CURRENT vs.

SUPPLY VOLTAGE (PER AMPLIFER)

2.0

1.9

1.8

1.7

1.6

1.5

SUPPLY CURRENT (mA)

1.4

1.3

1.2

2.7 3.5 3.93.1
SUPPLY VOLTAGE (V)

4.3

4.7 5.1 5.5

SMALL-SIGNAL GAIN WITH CAPACITIVE LOAD

and 22Ω ISOLATION RESISTOR vs. FREQUENCY

5

4

3

2

1

0

-1

-2

SMALL-SIGNAL GAIN (dB)

-3

-4

-5
100k 1M 10M 100M 1G

22pF

15pF

5pF

FREQUENCY (Hz)

SMALL-SIGNAL GAIN WITH CAPACATIVE LOAD

vs. FREQUENCY

10

8

6

4

2

0

SMALL-SIGNAL GAIN (dB)

-2

-4

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

FREQUENCY (Hz)

22pF

15pF

5pF

LARGE-SIGNAL GAIN FLATNESS

vs. FREQUENCY

0.5

0.4

0.3

0.2

0.1

0

-0.1

-0.2

LARGE-SIGNAL GAIN (dB)

-0.3

-0.4

-0.5
100k 1M 10M 100M 1G

V

= 2V

OUT

FREQUENCY (Hz)

V

OUT

P-P

3

2

MAX4412 toc01

MAX4412 toc04

1

0

-1

-2

-3

-4

SMALL-SIGNAL GAIN (dB)

-5

-6

-7

0.5

0.4

0.3

0.2

0.1

0

-0.1

GAIN FLATNESS (dB)

-0.2

-0.3

-0.4

-0.5

SMALL-SIGNAL GAIN vs. FREQUENCY

MAX4412 toc02

100k 1M 10M 100M 1G

FREQUENCY (Hz)

SMALL-SIGNAL

GAIN FLATNESS vs. FREQUENCY

MAX4412 toc05

100k 1M 10M 100M 1G

FREQUENCY (Hz)

= 1V

MAX4412 toc03

MAX4412 toc06

P-P

LARGE-SIGNAL GAIN vs. FREQUENCY

3

2

1

0

-1

-2

-3

-4

LARGE-SIGNAL GAIN (dB)

-5

-6

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

V

= 2V

OUT

FREQUENCY (Hz)

V

= 1V

OUT

P-P

GAIN AND PHASE vs. FREQUENCY

100

A

= +1000V/V

VCL

80

MAX4412 toc07

P-P

60

40

20

GAIN (dB)

0

-20

-40

-60

PHASE

10k 1M 1G

100K 100M10M

FREQUENCY (Hz)

GAIN

MAX4412 toc09

180

135

-45

-90

-135

-180

90

45

0

DIFFERENTIAL GAIN (%)

PHASE (deg)

DIFFERENTIAL PHASE (deg)

DIFFERENTIAL GAIN AND PHASE

0.04

0.03

0.02

0.01
0

0203010 40 50 60 70 80 90 100

IRE

0.15

0.10

0.05

0

0203010 40 50 60 70 80 90 100

IRE

MAX4412 toc10

MAX4412/MAX4413

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz
Single-Supply Op Amps with Rail-to-Rail Outputs

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= +5V, VEE= 0, VCM= 1.75V, A

VCL

= +1V/V, RF= 24Ω, RL= 1kΩ to VCC/2, CL= 5pF, TA= +25°C, unless otherwise noted.)

0

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

MAX4413

CROSSTALK vs. FREQUENCY

-80

MAX4412 toc18

FREQUENCY (Hz)

CROSSTALK (dB)

-60

-40

-20

-30

-50

-70

-90

-10

0

300

200

100

400

500

600

100 1000

MAX4412 toc19

R

LOAD

(Ω)

BANDWIDTH (MHz)

MAX4412/MAX4413

SMALL SIGNAL BANDWIDTH

vs. LOAD RESISTANCE

SMALL-SIGNAL PULSE RESPONSE

INPUT

50mV/div

OUTPUT

50mV/div

RL = 1kΩ

50ns/div

MAX4412 toc11

500mV/div

500mV/div

INPUT

OUTPUT

SMALL-SIGNAL PULSE RESPONSE

INPUT

50mV/div

OUTPUT

50mV/div

MAX4412 toc14

500mV/div

500mV/div

INPUT

OUTPUT

LARGE-SIGNAL PULSE RESPONSE

RL = 1kΩ

50ns/div

LARGE-SIGNAL PULSE RESPONSE

MAX4412 toc12

OUTPUT

MAX4412 toc15

0mV/div

OUTPUT

0mV/div

LARGE-SIGNAL PULSE RESPONSE

INPUT
1V/div

1V/div

RL = 1kΩ

SMALL-SIGNAL PULSE RESPONSE

(C

INPUT

50ns/div

= 15pF)

L

MAX4412 toc13

MAX4412 toc16

RL = 150Ω

MAX4412/MAX4413

CLOSED-LOOP OUTPUT IMPEDANCE

vs. FREQUENCY

1000

100

10

OUTPUT IMPEDANCE (Ω)

1

0.1
100k 1M 100M 1G

50ns/div

10M

FREQUENCY (Hz)

MAX4412 toc17

RL = 150Ω

50ns/div

50ns/div

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz

Single-Supply Op Amps with Rail-to-Rail Outputs

Typical Operating Characteristics (continued)

(VCC= +5V, VEE= 0, VCM= 1.75V, A

= +1V/V, RF= 24Ω, RL= 1kΩ to VCC/2, CL= 5pF, TA= +25°C, unless otherwise noted.)

VCL

MAX4412/MAX4413

OPEN-LOOP GAIN vs. LOAD RESISTANCE

140

120

100

80

60

OPEN-LOOP GAIN (dB)

40

20

0

100 1k 10k 100k

R

(Ω)

LOAD

COMMON-MODE REJECTION vs.

FREQUENCY

-40

-50

-60

-70

CMR (dB)

-80

450

400

MAX4412 toc20

350

300

250

200

150

100

OUTPUT VOLTAGE SWING (mV)

50

0

100 1k 10k

1000

MAX4412 toc23

100

OUTPUT VOLTAGE SWING vs.

LOAD RESISTANCE

V

OH

V

OL

R

(Ω)

LOAD

VOLTAGE NOISE DENSITY vs.

FREQUENCY

MAX4412 toc21

MAX4412 toc24

POWER SUPPLY REJECTION

vs. FREQUENCY

0

-10

-20

-30

-40

-50

PSR (dB)

-60

-70

-80

-90

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

FREQUENCY (Hz)

CURRENT NOISE DENSITY vs.

FREQUENCY

100

10

1

MAX4412 toc22

MAX4412 toc25

-90

-100
100k 10M 100M1M 1G

FREQUENCY (Hz)

HARMONIC DISTORTION vs. FREQUENCY

0

V

= 1V

OUT

p-p

-20

-40

-60

DISTORTION (dBc)

-80

-100

-120
100K 1M 10M 100M

2nd HARMONIC

3rd HARMONIC

FREQUENCY (Hz)

________________________________________________________________________________________

MAX4412 toc26

VOLTAGE NOISE DENSITY nV/√Hz

10

1 1k 10k 100k10 100 1M

FREQUENCY (Hz)

HARMONIC DISTORTION vs.

OUTPUT VOLTAGE

-60
f = 5MHz

-65

-70

-75

0 1.0 1.50.5

2nd HARMONIC

3rd HARMONIC

2.0

OUTPUT VOLTAGE (V

-80

-85

DISTORTION (dBc)

-90

-95

-100

2.5 3.0
)

p-p

MAX4412 toc27

3.5

CURRENT NOISE DENSITY pA/√Hz

0

1 1k 10k 100k10 100 1M

FREQUENCY (Hz)

HARMONIC DISTORTION vs.

LOAD RESISTANCE

0

V

= 1V

, f = 5MHz

OUT

p-p

-20

-40

-60

DISTORTION (dBc)

-80

-100

-120
100 1K 10K

2nd HARMONIC

3rd HARMONIC

R

(Ω)

LOAD

MAX4412 toc28

7

MAX4412/MAX4413

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz
Single-Supply Op Amps with Rail-to-Rail Outputs

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= +5V, VEE= 0, VCM= 1.75V, A

VCL

= +1V/V, RF= 24Ω, RL= 1kΩ to VCC/2, CL= 5pF, TA= +25°C, unless otherwise noted.)

ISOLATION RESISTANCE vs.

CAPACITIVE LOAD

30

28

26

24

22

(Ω)

20

ISO

R

18

16

14

12

10

0 400200 600 800 1000

C

(pF)

LOAD

MAX4412 toc29

750mV/div

V

SUPPLY

2.0V/div

INPUT BIAS CURRENT vs.

TEMPERATURE

3.0

2.5

2.0

1.5

1.0

INPUT BIAS CURRENT (μA)

0.5

0

-50 0 25-25 50 75 100

TEMPERATURE (°C)

INPUT OFFSET VOLTAGE vs.

TEMPERATURE

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

INPUT OFFSET VOLTAGE (mV)

0.2

0.1

0

-50 0-25 25 50 75 100

TEMPERATURE (°C)

POWER-UP RESPONSE TIME

3.0

+5V

2.5

MAX4412 toc30

2.0

0

1.5

+1.5V

V

OUT

500ns/div

1.0

SUPPLY CURRENT (mA)

0.5

0

0

-50 0 25-25 50 75 100

TEMPERATURE

MAX4412 toc31

TEMPERATURE (°C)

INPUT OFFSET CURRENT vs.

TEMPERATURE

SUPPLY CURRENT (PER AMPLIFIER) vs.

100

90

MAX4412 toc32

80

70

60

50

40

30

INPUT OFFSET CURRENT (nA)

20

10

0

-50 0-25 25 50 75 100

TEMPERATURE (°C)

MAX4412 toc33

OUTPUT VOLTAGE SWING vs.

TEMPERATURE

250

225

MAX4412 toc34

200

175

150

125

100

75

OUTPUT VOLTAGE SWING (mV)

50

25

0

VOH = VCC - V

-50 0-25 25 50 75 100

OUT

VOL = V

OUT

TEMPERATURE (°C)

- V

EE

MAX4412 toc35

MAX4412/MAX4413

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz

Single-Supply Op Amps with Rail-to-Rail Outputs

_______________________________________________________________________________________ 9

Detailed Description

The MAX4412/MAX4413 single-supply, rail-to-rail, volt­age-feedback amplifiers achieve 140V/µs slew rates
and 500MHz -3dB bandwidths, while consuming only

1.7mA of supply current per amplifier. 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.

Internal feedback around the output stage ensures low
open-loop output impedance, reducing gain sensitivity
to load variations. This feedback also produces
demand-driven current bias to the output transistors.

Rail-to-Rail Outputs,

Ground-Sensing Input

The MAX4412/MAX4413 input common-mode range
extends from (VEE- 0.1V) to (VCC- 1.5V) with excellent
common-mode 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 105mV of either power-sup­ply rail with a 1kΩ load. Input ground sensing and rail­to-rail outputs substantially increase the dynamic
range. With a symmetric input in a single +5V applica­tion, the input can swing 3.6Vp-p, and the output can
swing 4.6Vp-p with minimal distortion.

Output Capacitive Loading

and Stability

The MAX4412/MAX4413 are optimized for AC perfor­mance. They are not designed to drive highly reactive
loads. Such loads decrease phase margin and may

produce excessive ringing and oscillation. The use of
an isolation resistor eliminates this problem (Figure 1).
Figure 2 is a graph of the Optimal Isolation Resistor
(R

ISO

) vs. Capacitive Load.

The Small Signal Gain vs. Frequency with Capacitive
Load and No Isolation Resistor graph in the

Typical

Operating Characteristics

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. The Small-Signal
Gain vs. Frequency with Capacitive Load and 22Ω
Isolation Resistor graph shows the effect of a 22Ω 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.

___________Applications Information

Choosing Resistor Values

Unity-Gain Configuration

The MAX4412/MAX4413 are internally compensated for
unity gain. When configured for unity gain, the devices
require a 24Ω feedback resistor (R

F

). This resistor
improves AC response by reducing the Q of the paral­lel LC circuit formed by the parasitic feedback capaci­tance and inductance.

Pin Description

PIN

MAX4412 MAX4413

1 ⎯ OUT Amplifier Output
⎯ 1 OUTA Amplifier A Output
⎯ 7 OUTB Amplifier B Output

24VEENegative Power Supply

3 ⎯ IN+ Amplifier Noninverting Input

⎯ 3 INA+ Amplifier A Noninverting Input
⎯ 5 INB+ Amplifier B Noninverting Input

4 ⎯ IN- Amplifier Inverting Input
⎯ 2 INA- Amplifier A Inverting Input
⎯ 6 INB- Amplifier B Inverting Input

58VCCPositive Power Supply

NAME FUNCTION

MAX4412/MAX4413

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz
Single-Supply Op Amps with Rail-to-Rail Outputs

10 ______________________________________________________________________________________

Inverting and Noninverting Configurations

Select the gain-setting feedback (RF) and input (RG)
resistor values that best fit the 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 1.8pF of amplifier input capac­itance and 1pF of PC board capacitance, causes a
pole at 114MHz. Since this pole is within the amplifier
bandwidth, it jeopardizes stability. Reducing the 1kΩ
resistors to 100Ω extends the pole frequency to

1.14GHz, but could limit output swing by adding 200Ω
in parallel with the amplifier’s load resistor.

Note: For high-gain applications where output offset
voltage is a consideration, choose RS to be equal to the
parallel combination of R

F

and RG(Figures 3a and 3b):

Video Line Driver

The MAX4412/MAX4413 are designed to minimize dif­ferential gain error and differential phase error to 0.01%/

0.03° respectively, making them ideal for driving video
loads.

Active Filters

The low distortion and high bandwidth of the
MAX4412/MAX4413 make them ideal for use in active
filter circuits. Figure 4 is a 15MHz lowpass, multiple­feedback active filter using the MAX4412.

Figure 3a. Noninverting Gain Configuration

Figure 3b. Inverting Gain Configuration

Figure 1. Driving a Capacitive Load Through an Isolation
Resistor

Figure 2. Isolation Resistance vs. Capacitive Load

R

G

V

IN

R

BIN

R

F

R

ISO

RFR

×

R

S

=

RFR

G

+

G

R

=

R

R

F

V

= [1+ (RF / RG)] V

OUT

2
1

V

OUT

R

0

IN

GAIN

R

V

OUT

C

L

G

R

S

IN

ISOLATION RESISTANCE vs.

30

28

26

24

22

(Ω)

20

ISO

R

18

16

14

12

10

0 400200 600 800 1000

CAPACITIVE LOAD

C

(pF)

LOAD

MAX4412 toc29

R

IN

G

R

S

R

F

V

OUT

= (RF / RG) V

V

OUT

R

O

IN

MAX4412/MAX4413

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz

Single-Supply Op Amps with Rail-to-Rail Outputs

______________________________________________________________________________________ 11

ADC Input Buffer

Input buffer amplifiers can be a source of significant
errors in high-speed analog-to-digital converter (ADC)
applications. The input buffer is usually required to
rapidly charge and discharge the ADC’s input, which is
often capacitive (see

Output Capacitive Loading and

Stability

). In addition, since a high-speed ADC’s input
impedance often changes very rapidly during the con­version cycle, measurement accuracy must be main­tained using an amplifier with very low output
impedance at high frequencies. The combination of
high speed, fast slew rate, low noise, and a low and
stable distortion overload makes the MAX4412/
MAX4413 ideally suited for use as buffer amplifiers in
high-speed ADC applications.

Layout and Power-Supply Bypassing

These amplifiers operate from a single +2.7V to +5.5V
power supply. Bypass V

CC

to ground with a 0.1µF

capacitor as close to the pin as possible.

Maxim recommends using microstrip and stripline tech­niques to obtain full bandwidth. Design the PC board
for a frequency greater than 1GHz to prevent amplifier
performance degradation due to board parasitics.
Avoid large parasitic capacitances at inputs and out­puts. Whether or not a constant-impedance board is
used, observe the following guidelines:

• Do not use wire-wrap boards due to their high induc­tance.

• Do not use IC sockets because of the increased 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.

1

f

=×

0

2

Q

=

RRCC

2312

CC R R

×××

1223

1

++

RR R

1

×××π

C

2

1

2

1

1

3

MAX4412/MAX4413

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz
Single-Supply Op Amps with Rail-to-Rail Outputs

12 ______________________________________________________________________________________

_

Chip Information

MAX4412 TRANSISTOR COUNT: 99

MAX4413 TRANSISTOR COUNT: 192

PROCESS: Bipolar

Figure 4. Multiple-Feedback Lowpass Filter

+5.0V

R2
150Ω

R1

V

IN

150Ω

C1

100pF

R3

511Ω

C2

15pF

10k

10k

MAX4412

V

OUT

MAX4412/MAX4413

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz

Single-Supply Op Amps with Rail-to-Rail Outputs

______________________________________________________________________________________ 13

PACKAGE TYPE PACKAGE CODE DOCUMENT NO.

5 SC70 X5-1

21-0076

5 SOT23 U5-2

21-0057

8 SOT23 K8-5

21-0078

Package Information

For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.

SC70, 5L.EPS

PACKAGE OUTLINE, 5L SC70

21-0076

1

E

1

MAX4412/MAX4413

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz
Single-Supply Op Amps with Rail-to-Rail Outputs

14 ______________________________________________________________________________________

Package Information (continued)

For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.

SOT-23 5L .EPS

MAX4412/MAX4413

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz

Single-Supply Op Amps with Rail-to-Rail Outputs

______________________________________________________________________________________ 15

Package Information (continued)

For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.

MARKING

0

SOT23, 8L.EPS

0

PACKAGE OUTLINE, SOT-23, 8L BODY

1

21-0078

1

H

MAX4412/MAX4413

Low-Cost, Low-Power, Ultra-Small, 3V/5V, 500MHz
Single-Supply Op Amps with Rail-to-Rail Outputs

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

© 2009 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

Revision History

REVISION

NUMBER

0 11/00 Initial release —

1 1/09 Corrected slew rate value 1, 3, 9

REVISION

DATE

DESCRIPTION

PAGES

CHANGED