Maxim MAX4335EXT-T, MAX4336EXT-T, MAX4337EKA-T, MAX4337EUA, MAX4338EUB Schematics

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

|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

±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

100

220 400

280 400

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

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

OUT

< V

OH

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

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

±6 mV

±600 nA

±60 nA

CC

50 dB

66

56

mV

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

V

IH

V

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

= 0; VCC = 5V 1 µA

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

400

650

1µA

CC

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

, 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

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

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

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