Maxim MAX4335EXT-T, MAX4336EXT-T, MAX4337EKA-T, MAX4337EUA, MAX4338EUB Schematic [ru]

General Description

The MAX4335–MAX4338 op amps deliver 40mW per
channel into 32Ω from ultra-small SC70/SOT23 pack­ages making them ideal for mono/stereo headphone
drivers in portable applications. These amplifiers have
a 5MHz gain-bandwidth product and are guaranteed to
deliver 50mA of output current while operating from a
single supply of 2.7V to 5.5V.

The MAX4336 and the MAX4338 have a shutdown/mute
mode that reduces the supply current to 0.04µA per
amplifier and places the outputs in a high-impedance
state.

The MAX4335–MAX4338 have 90dB power-supply
rejection ratio (PSRR), eliminating the need for costly
pre-regulation in most audio applications. Both the
input voltage range and the output voltage swing
include both supply rails, maximizing dynamic range.

The MAX4335/MAX4336 single amplifiers are available
in ultra-small 6-pin SC70 packages. The MAX4337/
MAX4338 dual amplifiers are available in an 8-pin
SOT23 and a 10-pin µMAX package, respectively. All
devices are specified from -40°C to +85°C.

________________________Applications

32Ω Headphone Drivers
Portable/Battery-Powered Instruments
Wireless PA Control
Hands-Free Car Phones
Transformer/Line Drivers
DAC/ADC Buffers

Features

♦ 50mA Output Drive Capability
♦ Low 0.003% THD (20kHz into 10kΩ)

♦ Rail-to-Rail

®

Inputs and Outputs

♦ 2.7V to 5.5V Single-Supply Operation

♦ 5MHz Gain-Bandwidth Product

♦ 95dB Large-Signal Voltage Gain

♦ 90dB Power-Supply Rejection Ratio

♦ No Phase Reversal for Overdrive Inputs

♦ Ultra-Low Power Shutdown/Mute Mode

Reduces Supply Current to 0.04µA

Places Output in High-Impedance State

♦ Thermal Overload Protection

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

________________________________________________________________ Maxim Integrated Products 1

19-2136; Rev 1; 9/01

Ordering Information

Pin Configurations appear at end of data sheet.

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

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Typical Operating Circuit

PART TEMP RANGE

MAX4335EXT-T -40°C to +85°C 6 SC70-6 AAX

MAX4336EXT-T -40°C to +85°C 6 SC70-6 AAW

MAX4337EKA-T -40°C to +85°C 8 SOT23-8 AAIK

MAX4337EUA -40°C to +85°C 8 µMAX —

MAX4338EUB -40°C to +85°C 10 µMAX —

PIN­PACKAGE

MARK

TOP

R3

V

C1

IN

R4

V

CC

0.005

C2

MAX4335
MAX4336

R2

R1

C3

32Ω

0.004

THD + NOISE (%)

0.003

0.002

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

RL = 10kΩ,

= 5V

V

CC

= 2V

V

OUT

P-P

10 100 10k1k 100k

FREQUENCY (Hz)

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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 GND) ..................................-0.3V to +6V

All Other Pins to GND ....................(GND - 0.3V) to (V

CC

+ 0.3V)

Output Short-Circuit Duration to V

CC

or GND............Continuous

Continuous Power Dissipation (T

A

= +70°C)

6-Pin SC70 (derate 3.1mW/°C above +70°C)...............245mW

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

8-Pin µMAX (derate 4.5mW/°C above +70°C) ..............362mW

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

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

DC ELECTRICAL CHARACTERISTICS

(VCC= 2.7V, GND = 0, VCM= 0, V

OUT

= VCC/2, RL= ∞ to VCC/2, V

SHDN

= V

CC,

TA= +25°C, unless otherwise noted.)

Operating Supply Voltage Range V

Quiescent Supply Current (Per
Amplifier)

Input Offset Voltage V

Input Bias Current I

Input Offset Current I

Differential Input Resistance R

Input Common-Mode Voltage
Range

Common-Mode Rejection Ratio CMRR VCM = GND to V

Power-Supply Rejection Ratio PSRR VCC = 2.7V to 5.5V 70 90 dB

Output Resistance R

Large-Signal Voltage Gain A

Output Voltage Swing V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CC

I

CC

OS

B

OS

IN(Diff)

V

CM

OUT

VOL

OUT

Inferred from PSRR Test 2.7 5.5 V

V

CC

V

CC

V

CM

VCM = GND to V

VCM = GND to V

|V

IN-

|

VIN-

Inferred from CMRR Test GND V

AVCL = 1V/V 0.05 Ω

VCC = 5V: RL = 10kΩ
V

OUT

VCC = 5V: RL = 100Ω
V

OUT

VCC = 2.7V: RL = 32Ω
V

OUT

VCC = 2.7V;
R

= 10kΩ

L

VCC = 2.7V;
R

= 32Ω

L

VCC = 5V;
R

= 10kΩ

L

VCC = 5V;
R

= 100Ω

L

= 5.5V 1.3 1.8

= 2.7 1.2

= GND to V

- V

| < 1.2V 500

IN+

- V

| > 1.2V 8.4

IN+

= 0.4V to 4.6V

= 0.5V to 4.5V

= 0.5V to 2.2V

CC

CC

CC

CC

±0.6 ±3 mV

±100 ±400 nA

60 80 dB

70 84

62 72

VCC - V

V

OL

VCC - V

V

OL

VCC - V

V

OL

VCC - V

V

OL

OH

OH

OH

OH

100

100

220 400

280 400

100

100

190 350

240 350

±7 ±30 nA

CC

95

mA

kΩ

V

dB

mV

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC= 2.7V, GND = 0, VCM= 0, V

OUT

= VCC/2, RL= ∞ to VCC/2, V

SHDN

= V

CC,

TA= +25°C, unless otherwise noted.)

DC ELECTRICAL CHARACTERISTICS

(VCC= 2.7V, GND = 0, VCM= 0, V

OUT

= VCC/2, RL= ∞ to VCC/2, V

SHDN

= V

CC,

TA= -40°C to +85°C, unless otherwise noted.)

(Note 1)

(

)

)

Output Drive I

Short-Circuit Current I

SHDN Logic Levels

SHDN Leakage Current I

Output Leakage Current in
Shutdown

Shutdown Supply Current
(Per Amplifier)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

VCC = 2.7V;
I

SOURCE

I

OUT

SC

V

V

IL

I

SHDN

OUT

I

CC(SHDN

IH

IL

SINK

VCC = 5V;
I

SOURCE

I

SINK

Normal mode 0.7 x V

Shutdown mode 0.3 x V

VCC = 5V, GND < V

VCC = 5V, V
V

CC

SHDN = GND; VCC = 5V <0.04 0.5 µA

,

= 50mA

,

= 50mA

SHDN

VCC - V

V

VCC - V

V

SHDN

= 0, V

270 500

360 500

270 500

360 500

110 mA

0.01 0.5 µA

OL

OL

OUT

< V

OH

OH

CC

CC

= 0,

CC

0.5 µA

Operating Supply Voltage Range V

Quiescent Supply Current (Per
Amplifier)

Input Offset Voltage V

Input Bias Current I

Input Offset Current I

Input Common-Mode Voltage
Range

Common-Mode Rejection Ratio CMRR VCM = GND to V

Power-Supply Rejection Ratio PSRR VCC = 2.7V to 5.5V 64 dB

Large-Signal Voltage Gain A

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Inferred from PSRR test 2.7 5.5 V

CC

I

V

CC

OS

VOL

VCC = 5.5V 2.25 mA

V

OS

B

CM

= GND to V

CM

VCM = GND to V

VCM = GND to V

Inferred from CMRR test GND V

VCC = 5V: R

= 0.6V to 4.4V

V

OUT

VCC = 2.7V: RL = 32Ω,
V

= 0.6V to 2.1V

OUT

= 100Ω,

L

CC

CC

CC

CC

±6 mV

±600 nA

±60 nA

CC

50 dB

66

56

mV

V

V

dB

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

4 _______________________________________________________________________________________

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC= 2.7V, GND = 0, VCM= 0, V

OUT

= VCC/2, RL = ∞ to VCC/2, V

SHDN

= V

CC,

TA= -40°C to +85°C, unless otherwise noted.)

(Note 1)

AC ELECTRICAL CHARACTERISTICS

(VCC= 2.7V, GND = 0, VCM= VCC/2, V

OUT

= VCC/2, V

SHDN

= V

CC,

A

VCL

= 1V/V, CL= 15pF, RL = ∞ to VCC/2,TA= +25°C, unless

otherwise noted.)

)

)

Output Voltage Swing V

Output Drive I

SHDN Logic Level

SHDN Leakage Current I

Output Leakage Current in
Shutdown

Shutdown Supply Current
(Per Amplifier)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

VCC = 2.7V;

= 32Ω

R

OUT

OUT

V

IH

V

IL

IL

I

OUT(SHDN

I

CC(SHDN

L

VCC = 5V;

= 100Ω

R

L

VCC = 2.7V;
I
I

VCC = 5V;
I
I

Normal mode 0.7 x V

Shutdown mode 0.3 x V

VCC = 5V, GND < V

V
V

V

,

SOURCE

= 50mA

SINK

,

SOURCE

= 50mA

SINK

= 5V, V

CC

CC

= 0; VCC = 5V 1 µA

SHDN

SHDN

SHDN

= 0, V

VCC - V

OH

V

OL

VCC - V

OH

V

OL

VCC - V

OH

V

OL

V

- V

CC

OH

V

OL

CC

< V

CC

= 0;

OUT

500

500

400

400

650

650

650

650

1µA

1µA

CC

mV

mV

V

Gain-Bandwidth Product GBWP 5 MHz

Full-Power Bandwidth FBWP V

Slew Rate SR 1.8 V/µs

Phase Margin PM 70 degrees

Gain Margin GM 18 dB

Total Harmonic Distortion THD

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

= 2V

OUT

VCC = 5V, RL = 100Ω,
V

OUT

VCC = 5V, RL = 10kΩ, V
f = 10kHz
V

CC

= 32Ω,

R

L

V

OUT

= 2V

= 2.7V;

= 2V

P-P

P-P

P-P

, VCC = 5V 280 kHz

f = 1kHz 0.005

f = 10kHz 0.02

= 2V

OUT

f = 1kHz 0.01

f = 10kHz 0.03

P-P

,

0.003

%

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

_______________________________________________________________________________________ 5

AC ELECTRICAL CHARACTERISTICS (continued)

(VCC= +2.7V, GND = 0, VCM= VCC/2, V

OUT

= VCC/2, V

S HDN

= V

CC,

A

VCL

= 1V/V, CL= 15pF, RL = ∞ to VCC/2, TA= +25°C, unless

otherwise noted.)

Note 1: All devices are 100% production tested at T

A

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

__________________________________________Typical Operating Characteristics

(VCC= 2.7V, GND = 0, VCM= 0, V

OUT

= VCC/2, RL = ∞ to VCC/2, V

S HDN

= V

CC,

TA= +25°C, unless otherwise noted.)

1.4

1.3

1.2

1.1

1.0

-40 10-15 35 60 85

MAX4335-8 toc01

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

VCC = 5.5V

VCC = 2.7V

SUPPLY CURRENT PER AMPLIFIER

vs. TEMPERATURE

1.5

1.6

1.7

1.8

1.9

2.0

2.1

2.2

2.3

-40 -15 10 35 60 85

MAX4335-8 toc02

TEMPERATURE (°C)

MINIMUM OPERATING VOLTAGE (V)

MINIMUM OPERATING VOLTAGE

vs. TEMPERATURE

0

300

200

100

400

500

600

700

800

900

1000

MAX4335-8 toc03

TEMPERATURE (°C)

SUPPLY CURRENT (pA)

SHUTDOWN SUPPLY CURRENT

vs. TEMPERATURE

-40 -15 10 35 60 85

VCC = 5.5V

VCC = 2.7V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Settling Time to 0.01% t

Crosstalk CT V

Input Capacitance C

Input Voltage-Noise Density e

Input Current-Noise Density I

Capacitive-Load Stability No sustained oscillation 200 pF

Shutdown Time t

Enable Time from Shutdown t

Power-Up Time t

S

IN

n

n

SHDN

ENABLE

ON

2V step 2 µs

OUT

= 2V

; f = 1kHz 100 dB

P-P

5pF

f = 10kHz 26

f = 1kHz

f = 10kHz 0.6

f = 1kHz

1µs

1µs

5µs

nV/√Hz

pA/√Hz

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

6 _______________________________________________________________________________________

MAX4335

8 toc04

)

Typical Operating Characteristics (continued)

(VCC= 2.7V, GND = 0, VCM= 0, V

OUT

= VCC/2, RL = ∞ to VCC/2, V

S HDN

= V

CC,

TA= +25°C, unless otherwise noted.)

INPUT OFFSET VOLTAGE

vs. TEMPERATURE

1.0

0.8

0.6

0.4

0.2

0

-0.2

-0.4

INPUT OFFSET VOLTAGE (mV)

-0.6

-0.8

-1.0

SC70

-40 -15 10 35 60 85

µMAX

TEMPERATURE (°C)

100

-

-50

-100

INPUT BIAS CURRENT (nA)

-150

-200

COMMON-MODE REJECTION RATIO

vs. TEMPERATURE

85

84

83

CMRR (dB)

82

81

80

-40 -15 10 35 60 85

TEMPERATURE (°C)

480

440

MAX4335-8 toc07

400

360

320

280

240

200

OUTPUT LOW VOLTAGE (mV)

160

120

INPUT BIAS CURRENT

vs. COMMON-MODE VOLTAGE

VCC = 2.7V VCC = 5.5V

50

0

0231 456

COMMON-MODE VOLTAGE (V)

OUTPUT LOW VOLTAGE

vs. TEMPERATURE

VCC = 5.5V

= 100Ω

R

L

VCC = 5.5V

= 100Ω

R

L

80

-40 -15 10 35 60 85

TEMPERATURE (°C)

VCC = 2.7V

= 100Ω

R

L

VCC = 2.7V

= 100Ω

R

L

200

150

MAX4335 toc05

100

50

0

-50

-100

INPUT BIAS CURRENT (nA)

-150

-200

-250

-40 -15 10 35 60 85

350

300

MAX4335-8 toc08

250

200

150

100

OUTPUT HIGH VOLTAGE (mV)

50

0

-40 -15 10 35 60 85

INPUT BIAS CURRENT

vs. TEMPERATURE

VCM = V
VCC = 5.5V

VCM = V

CC

VCC = 2.7V

TEMPERATURE (°C)

OUTPUT HIGH VOLTAGE

vs. TEMPERATURE

VCC = 5.5V

= 100Ω

R

L

VCC = 5.5V

= 100Ω

R

L

TEMPERATURE (°C)

VCM = 0

= 2.7V

V

CC

CC

VCM = 0
V

CC

VCC = 2.7V

= 100Ω

R

L

VCC = 2.7V
R

L

MAX4335-8 toc06

= 5.5V

MAX4335-8 toc09

= 100Ω

OUTPUT CURRENT vs. OUTPUT VOLTAGE

(SINKING)

250

200

150

100

OUTPUT CURRENT (mA)

50

0

0 1.6

VCC = 2.7V

0.80.4 1.2

OUTPUT VOLTAGE (V)

VCC = 5.5V

250

MAX4335 toc10

200

150

100

OUTPUT CURRENT (mA)

50

0

OUTPUT CURRENT vs. OUTPUT VOLTAGE

(SOURCING)

VCC = 5.5V

VCC = 2.7V

0 1.6

0.4 0.60.2 0.8 1.0 1.2 1.4
OUTPUT VOLTAGE (V

MAX4335 toc11

LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE

(SINKING, V

RL REFERENCED TO V

115

105

95

85

75

LARGE-SIGNAL GAIN (dB)

65

55

0 0.20.1 0.3 0.4 0.5

OUTPUT VOLTAGE (V)

CC

= 5.5V)

CC

RL = 100kΩ

RL = 1kΩ

RL = 100Ω

MAX4335 toc12

MAX4335-8 toc19

FREQUENCY (Hz)

PSRR (dB)

100 1k 10k 100k 1M 10M

-110

-90

-70

-30

-50

-10

10

-100

-80

-60

-20

-40

0

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

100

0.01
1k 10k 1M 10M

OUTPUT IMPEDANCE

vs. FREQUENCY

0.1

1

10

MAX4335-8 toc20

FREQUENCY (Hz)

OUTPUT IMPEDANCE (Ω)

100k

AV = 1

0.040

0.035

0.030

0.025

0.020

0.015

0.010

0.005

0

10 1k 10k100 100k

TOTAL HARMONIC DISTORTION AND

NOISE vs. FREQUENCY

MAX4335/8 toc21

FREQUENCY (Hz)

THD + NOISE (%)

VCC = 5V
V

OUT

= 2V

P-P

500kHz LOWPASS FILTER
R

L

= 10kΩ to VCC/2

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

_______________________________________________________________________________________ 7

(Hz)

QUENCY (Hz)

Typical Operating Characteristics (continued)

(VCC= 2.7V, GND = 0, VCM= 0, V

OUT

= VCC/2, RL = ∞ to VCC/2, V

S HDN

= V

CC,

TA= +25°C, unless otherwise noted.)

LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE

120

(SOURCING, V

RL REFERENCED TO VCC/2

110

100

90

80

70

LARGE-SIGNAL GAIN (dB)

60

50

RL = 1kΩ

RL = 100Ω

0.1 0.2 0.3 0.4 0.5
OUTPUT VOLTAGE (V)

CC

RL = 100kΩ

= 5.5V)

LARGE-SIGNAL GAIN vs. TEMPERATURE

110

100

VCC = 2.7V

= 100kΩ

R

90

80

70

LARGE-SIGNAL GAIN (dB)

60

50

-40 10-15 35 60 85

L

VCC = 2.7V

= 32Ω

R

L

°

VCC = 5V
R

LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE

115

MAX4335 toc13

105

95

85

75

65

LARGE-SIGNAL GAIN (dB)

55

45

35

0.1 0.2 0.3 0.4 0.5

70

60

MAX4335 toc16

50

40

30

= 100Ω

L

20

GAIN (dB)

10

0

-10

-20

-30
100 1k 10k 100k 1M 10M

(SINKING, V

RL REFERENCED TO V

RL = 100kΩ

CC

RL = 100Ω

OUTPUT VOLTAGE (V)

GAIN AND PHASE vs. FREQUENCY

A

VCL

FREQUENCY

= 2.7V)

CC

RL = 1kΩ

= 1000V/V

MAX4335-8 toc17

LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE

(SOURCING, V

110

MAX4335 toc14

100

RL = 1kΩ

90

80

70

60

LARGE-SIGNAL GAIN (dB)

50

40

0.05 0.25 0.350.15 0.45 0.55 0.65 0.75

RL = 100kΩ

R

REFERENCED TO VCC/2

L

OUTPUT VOLTAGE (V)

GAIN AND PHASE vs. FREQUENCY

= 200pF)

(C

216

180

144

108

72

36

0

-36

-72

-108

-144

70

60

50

40

30

20

GAIN (dB)

10

PHASE (DEGREES)

0

-10

-20

-30
100 1k 10k 100k 1M 10M

L

A

FRE

= 1000V/V

VCL

= 2.7V)

CC

RL = 100Ω

RL = 32Ω

MAX4335-8 toc18

MAX4335 toc15

216

180

144

108

72

36

0

PHASE (DEGREES)

-36

-72

-108

-144

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

8 _______________________________________________________________________________________

____________________________Typical Operating Characteristics (continued)

(VCC= 2.7V, GND = 0, VCM= 0, V

OUT

= VCC/2, RL = ∞ to VCC/2, V

S HDN

= V

CC,

TA= +25°C, unless otherwise noted.)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. PEAK-TO-PEAK OUTPUT VOLTAGE

10

FREQUENCY = 10kHz

1

0.1

THD + NOISE (%)

0.01

RL = 100Ω

RL = 1kΩ

-60

MAX4335 toc22

-70

-80

R

= 100kΩ

L

-90

-100

CHANNEL-TO-CHANNEL ISOLATION

CHANNEL-TO-CHANNEL ISOLATION

vs. FREQUENCY

MAX4335/8 toc23

20mV/div

20mV/div

SMALL-SIGNAL TRANSIENT RESPONSE

(NONINVERTING)

IN

OUT

MAX4335 toc24

0.001

3.0 4.03.5 5.0 5.5
PEAK-TO-PEAK OUTPUT VOLTAGE (V)

4.5

-110

20mV/div

OUT

20mV/div

SMALL-SIGNAL TRANSIENT RESPONSE

IN

(INVERTING)

200ns/div

MAX4335 toc25

2V/div

OUT

2V/div

10 1k100 100k 10M

10k 1M

FREQUENCY (Hz)

LARGE-SIGNAL TRANSIENT RESPONSE

(NONINVERTING)

IN

2µs/div

200ns/div

LARGE-SIGNAL TRANSIENT RESPONSE

(INVERTING)

= 5V

V

CC

MAX4335 toc26

IN

2V/div

OUT

2V/div

2µs/div

VCC = 5V

MAX4335 toc27

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

_______________________________________________________________________________________ 9

Pin Description

Typical Application Circuit

L INPUT

V

REF

MUTE

R INPUT

PIN

MAX4337

MAX4335 MAX4336

SOT23 µMAX

1 1 3, 5 3, 5 3, 7 IN1+, IN2

2 2 4 4 4 GND Ground

3 3 2, 6 2, 6 2, 8 IN2-, IN2

4 4 1, 7 1, 7 1, 9 OUT1, OUT2 Output(s)

5 ——— — N.C. No Connection. Not internally connected.

— 5 —— 5, 6 SHDN1, SHDN2

6 6 8 8 10 V

MAX4338

MAX4338

NAME FUNCTION

+

Noninverting Input

­Inverting Input

Drive SHDN low for shutdown. Drive SHDN

CC

high or connect to V

Positive Supply

for normal operation.

CC

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

10 ______________________________________________________________________________________

Applications Information

Package Power Dissipation

Warning: Due to the high-output-current drive, this op
amp can exceed the absolute maximum power-dissi­pation rating. As a general rule, as long as the peak cur-

rent is less than or equal to 50mA, the maximum package
power dissipation will not be exceeded for any of the
package types offered. There are some exceptions to this
rule, however. The absolute maximum power-dissipation
rating of each package should always be verified using
the following equations. The following equation gives an
approximation of the package power dissipation:

where: V

RMS

= the RMS voltage from VCCto V

OUT

when sourcing current

= the RMS voltage from V

OUT

to V

EE

when sinking current

I

RMS

= the RMS current flowing out of or into

the op amp and the load

θ = the phase difference between the

voltage and the current. For resistive
loads, COS θ = 1.

For example, the circuit in Figure 1 has a package
power dissipation of 220mW.

Therefore, P

IC(DISS)

= V

RMSIRMS

COS θ = 220mW

Adding a coupling capacitor improves the package
power dissipation because there is no DC current to
the load, as shown in Figure 2.

Therefore, P

IC(DISS)

= V

RMSIRMS

COS θ

= 45mW

The absolute maximum power-dissipation rating of the
package may be exceeded if the configuration in
Figure 1 is used with the MAX4335/MAX4336 amplifiers
at a high ambient temperature of 79°C (220.6mW/°C
plus a derating of 3.1mW/°C x 9°C = 247.9mW). Note
that the 247.9mW just exceeds the absolute maximum
power dissipation of 245mW for the 6-pin SC70 package.

Figure 1. A Circuit Example where the MAX4335/MAX4336 is
Dissipating High Power

Figure 2. A Circuit Example where Adding a Coupling
Capacitor Greatly Reduces the Power Dissipation of Its
Package

I +

P V I COS

IC DISS RMS RMS

()

≅θ

V

V V V

≅−

RMS CC DC

()

PEAK

−

2

V

=− −=

. . .

VV

55 275

1

2 043

2

I

≅=+

I

RMS

DC

PEAK

2

=

108

mA

RMS

.

VV

275

32

Ω

132

V

RMS

/

2

Ω

5.5V

R

C

V

= 2V

IN

P-P

MAX4335

R

MAX4336

32Ω

5.5V

R

C

IN

V

= 2V

IN

P-P

MAX4335

R

MAX4336

CC > 1
2π R

WHERE fL IS THE LOW-FREQUENCY CUTOFF

L fL

C

C

32Ω

V V V

≅−

RMS CC DC

()

V

PEAK

−

2

V

=− −=

. . .

VV

55 275

1

2 043

V

RMS

2

I

I +

≅=+

IA

RMS

DC

PEAK

0

2

=

22

mA

RMS

/

V

132

Ω

2

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

______________________________________________________________________________________ 11

Single-Supply Speaker Driver

The MAX4335/MAX4336 can be used as a single-sup­ply speaker driver, as shown in the Typical Operating
Circuit. Capacitor C1 is used for blocking DC (a 0.1µF
ceramic capacitor can be used). When choosing resis­tors R3 and R4, take into consideration the input bias
current as well as how much supply current can be tol­erated. Choose resistors R1 and R2 according to the
amount of gain and current desired. Capacitor C3
ensures unity gain for DC. A 10µF electrolytic capacitor
is suitable for most applications. The coupling capaci­tor C2 sets a low-frequency pole and is fairly large in
value. For a 32Ω load, a 100µF coupling capacitor
gives a low-frequency pole at 50Hz. The low-frequency
pole can be set according to the following equation:

ƒ = 1 / 2π (RLC2)

Rail-to-Rail Input Stage

Devices in the MAX4335–MAX4338 family of high­output-current amplifiers have rail-to-rail input and output
stages designed for low-voltage, single-supply opera­tion. The input stage consists of separate NPN and
PNP differential stages that combine to provide an
input common-mode range that extends 0.25V beyond
the supply rails. The PNP stage is active for input volt­ages close to the negative rail, and the NPN stage is
active for input voltages near the positive rail. The
switchover transition region, which occurs near VCC/2,
has been extended to minimize the slight degradation
in common-mode rejection ratio caused by mismatch of
the input pairs.

Since the input stage switches between the NPN and
PNP pairs, the input bias current changes polarity as the
input voltage passes through the transition region. Match
the effective impedance seen by each input to reduce the
offset error caused by input bias currents flowing through
external source impedances (Figures 3 and 5).

High source impedances, together with input capaci­tance, can create a parasitic pole that produces an
underdamped signal response. Reducing the input
impedance or placing a small (2pF to 10pF) capacitor
across the feedback resistor improves response.

The MAX4335–MAX4338’s inputs are protected from large
differential input voltages by 1kΩ series resistors and
back-to-back double diodes across the inputs (Figure 5).

For differential voltages less than 1.2V, input resistance is
typically 500kΩ. For differential input voltages greater
than 1.2V, input resistance is approximately 8.4kΩ. The
input bias current is given by the following equation:

I

BIAS

= (V

DIFF

- 1.2V) / 8.4kΩ

Rail-to-Rail Output Stage

The minimum output is within millivolts of ground for
single-supply operation, where the load is referenced
to ground (GND). Figure 6 shows the input voltage
range and the output voltage swing of a MAX4335 con­nected as a voltage follower. The maximum output volt­age swing is load dependent; however, it is guaranteed
to be within 400mV of the positive rail (VCC= 2.7V)
even with maximum load (32Ω to VCC/2).

Driving Capacitive Loads

The MAX4335–MAX4338 have a high tolerance for
capacitive loads. They are stable with capacitive loads
up to 200pF. Figure 7 is a graph of the stable operating
region for various capacitive loads vs. resistive loads.

Figure 3. Reducing Offset Error Due to Bias Current
(Noninverting)

Figure 4. Reducing Offset Error Due to Bias Current (Inverting)

MAX4335–MAX4338

R3

R3 = R1 R2

R1 R2

MAX4335–MAX4338

R3

R3 = R1 R2

R1 R2

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

12 ______________________________________________________________________________________

Figures 8 and 9 show the transient response with
excessive capacitive loads (330pF), with and without
the addition of an isolation resistor in series with the
output. Figure 10 shows a typical noninverting capaci­tive-load-driving circuit in the unity-gain configuration.
The resistor improves the circuit’s phase margin by iso­lating the load capacitor from the op amp’s output.

Power-Up and Shutdown/Mute Modes

The MAX4336/MAX4338 have a shutdown option.
When the shutdown pin (SHDN) is pulled low, supply
current drops to 0.04µA per amplifier (VCC= 5V), the
amplifiers are disabled, and their outputs are placed in
a high-impedance state. Pulling SHDN high enables
the amplifier. In the dual MAX4338, the two amplifiers
shut down independently. Figure 11 shows the
MAX4336’s output voltage response to a shutdown
pulse. The MAX4335–MAX4338 typically settle within
5µs after power-up (Figure 12).

Power Supplies and Layout

The MAX4335–MAX4338 can operate from a single

2.7V to 5.5V supply. Bypass the power supply with a

0.1µF ceramic capacitor in parallel with at least 1µF.
Good layout improves performance by decreasing the
amount of stray capacitance at the op amps’ inputs
and outputs. Decrease stray capacitance by placing
external components close to the op amps’ input/output
pins, minimizing trace and lead lengths.

Thermal Overload Protection

The MAX4335–MAX4338 includes thermal overload
protection circuitry. When the junction temperature of
the device exceeds +140°C, the supply current drops
to 120µA per amplifier (VCC= 5V) and the outputs are
placed in a high-impedance state. The device returns
to normal operation when the junction temperature falls
to below +120°C.

Short-Circuit Current Protection

The MAX4335–MAX4338 incorporate a smart short-cir­cuit protection feature. Figure 7 shows the output volt­age region where the protection circuitry is active. A
fault condition occurs when I

OUT

> 110mA and V

OUT

>

1V (sinking current) or when I

OUT

> 110mA and (VCC-

V

OUT

) > 1V (sourcing current). When a fault is detect­ed, the short-circuit protection circuitry is activated and
the output current is limited to 110mA, protecting the
device and the application circuitry. When the smart
short circuit is not active, the output current can safely
exceed 110mA (see the Output Current vs. Output
Voltage Graph in the Typical Operating Characteristics).

Figure 5. Input Protection Circuit

4.2kΩ

4.2kΩ

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

______________________________________________________________________________________ 13

(1V/div)

Figure 6. Rail-to-Rail Input/Output Range

Figure 7. Short-Circuit Protection

Figure 8. Capacitive-Load Stability

Figure 9. Small-Signal Transient Response with Excessive
Capacitive Load

OUT

(1V/div)

IN

V

OUT

V

CC

IN SOURCE MODE, SHORT-CIRCUIT PROTECTION CIRCUITRY IS NOT
ACTIVATED FOR (V

V

EXCEED 110mA.

- 1V

CC

1V

IN SINK MODE, SHORT-CIRCUIT PROTECTION CIRCUITRY IS NOT
ACTIVATED FOR V
EXCEED 110mA.

0

- V

) < 1V. OUTPUT CURRENT CAN SAFELY

CC

OUT

SHORT-CIRCUIT PROTECTION CIRCUITRY

LIMITS OUTPUT CURRENT TO 110mA

< 1V. OUTPUT CURRENT CAN SAFELY

OUT

1300
1200
1100
1000

900
800
700
600
500
400

CAPACITIVE LOAD (pF)

300

200
100

= 5.0V

V

CC

to VCC/2

R

L

UNSTABLE REGION

STABLE REGION

0

10 100k

100 1k 10k

RESISTIVE LOAD (Ω)

MAX4335-fig07

VCC = 3.0V, CL = 330pF

(20mV/div)

OUT

(20mV/div)

IN

= 100kΩ, R

R

L

= 0

ISO

1µs/div

MAX4335-fig08

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

14 ______________________________________________________________________________________

Figure 12. Shutdown Output Voltage Enable/Disable

Figure 13. Power-Up/Down Output Voltage

Figure 10. Small-Signal Transient Response with Excessive
Capacitive Load with Isolation Resistor

Figure 11. Capacitive-Load-Driving Circuit

VCC = 3.0V, CL = 330pF

= 100kΩ, R

R

L

ISO

= 39Ω

IN

(20mV/div)

OUT

(20mV/div)

1µs/div

MAX4335-fig11

SHDN
1V/div

R

MAX4336

V

CC

1V/div

ISO

C

L

MAX4335-fig12

OUT

1V/div

5µs/div

OUT

2V/div

5µs/div

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

______________________________________________________________________________________ 15

___________________Chip Information

MAX4335 TRANSISTOR COUNT: 1200
MAX4336 TRANSISTOR COUNT: 1200
MAX4337 TRANSISTOR COUNT: 2400
MAX4338 TRANSISTOR COUNT: 2400
PROCESS: BiCMOS

Pin Configurations

TOP VIEW

( ) MAX4335 ONLY

+

IN

16V

GND

MAX4335

2

MAX4336

-

34

SC70

CC

5 SHDN (N.C.)

OUTIN

OUT1

IN1-

IN1+

GND

1

2

3

4

MAX4337

SOT23/µMAX

87V

6

5

CC

OUT2

IN2-

IN2+

OUT1

IN1-

IN1+

GND

1

2

MAX4338

3

4

5

µMAX

10

V

CC

9

OUT2

IN2-

8

7

IN2+

6

SHDN2SHDN1

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

16 ______________________________________________________________________________________

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)

0.6±0.1

0.6±0.1

8

1

TOP VIEW

ÿ 0.50±0.1

D

4X S

E H

BOTTOM VIEW

8

1

DIM

A
A1
A2
b

c
D
e

E
H

L

α

S

INCHES

MIN

-

0.002

0.030

0.010

0.005

0.116

0.0256 BSC

0.116

0.188

0.016
0∞

0.0207 BSC

MAX

0.043

0.006

0.037

0.014

0.007

0.120

0.120

0.198

0.026
6∞

MILLIMETERS

MAX

MIN

- 1.10

0.05 0.15

0.950.75

0.25 0.36

0.13 0.18

2.95 3.05

0.65 BSC

2.95 3.05

4.78

5.03

0.41

0.66

0.5250 BSC

8LUMAXD.EPS

6∞0∞

A2

e

FRONT VIEW

A1

A

b

c

L

SIDE VIEW

α

PROPRIETARY INFORMATION

TITLE:

PACKAGE OUTLINE, 8L uMAX/uSOP

21-0036

REV.DOCUMENT CONTROL NO.APPROVAL

1

J

1

SOT23, 8L.EPS

MAX4335–MAX4338

SC70/SOT23-8, 50mA I

OUT

, Rail-to-Rail I/O

Op Amps with Shutdown/Mute

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 ____________________ 17

© 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)

0.6±0.1

e

10

ÿ 0.50±0.1

1

0.6±0.1

TOP VIEW

D2

A2

D1

FRONT VIEW

4X S

H

BOTTOM VIEW

GAGE PLANE

A

b

α

A1

10

1

E2

E1

SIDE VIEW

INCHES

MAX

MIN

DIM

A1
A2 0.030 0.037 0.75 0.95
D1
D2
E1
E2
H
L
L1
b
e
c

S

α

c

L

L1

PROPRIETARY INFORMATION

TITLE:

PACKAGE OUTLINE, 10L uMAX/uSOP

0.043

-A

0.002

0.006

0.116

0.120

0.114

0.118

0.116

0.120

0.118

0.114

0.199

0.187

0.0275

0.0157

0.037 REF

0.007

0.0106

0.0197 BSC

0.0035

0.0078

0.0196 REF
6∞

0∞ 0∞ 6∞

21-0061

MILLIMETERS

MAX

MIN

-

1.10

0.05

0.15

2.95

3.05

3.00

2.89

3.05

2.95

2.89

3.00

4.75

5.05

0.40

0.70

0.940 REF

0.177

0.270

0.500 BSC

0.090

0.200

0.498 REF

REV.DOCUMENT CONTROL NO.APPROVAL

I

1

1

10LUMAX.EPS