MAX4335EXT-T [MAXIM]
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute; SC70 / SOT23-8为50mA IOUT ，轨到轨输入/输出运算放大器，带有关断/静音
| 型号： | MAX4335EXT-T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute |
| 文件： | 总17页 (文件大小：540K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-2136; Rev 1; 9/01
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
General Description
Features
The MAX4335–MAX4338 op amps deliver 40mW per
channel into 32Ω from ultra-small SC70/SOT23 pack-
ages 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.
ꢀ 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
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.
ꢀ 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
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.
Ordering Information
PIN-
PACKAGE
TOP
MARK
PART
TEMP RANGE
________________________Applications
32Ω Headphone Drivers
MAX4335EXT-T
MAX4336EXT-T
-40°C to +85°C
-40°C to +85°C
6 SC70-6
6 SC70-6
8 SOT23-8
8 µMAX
AAX
AAW
AAIK
—
Portable/Battery-Powered Instruments
Wireless PA Control
Hands-Free Car Phones
Transformer/Line Drivers
MAX4337EKA-T -40°C to +85°C
MAX4337EUA
-40°C to +85°C
-40°C to +85°C
MAX4338EUB
10 µMAX
—
DAC/ADC Buffers
Pin Configurations appear at end of data sheet.
Typical Operating Circuit
V
CC
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
0.005
R = 10kΩ,
L
R3
R4
V
V
= 5V
OUT
CC
C1
= 2V
P-P
V
IN
C2
0.004
0.003
0.002
MAX4335
MAX4336
32Ω
R2
R1
C3
10
100
1k
10k
100k
FREQUENCY (Hz)
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
________________________________________________________________ Maxim Integrated Products
1
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.
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
to GND) ..................................-0.3V to +6V
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
CC
All Other Pins to GND ....................(GND - 0.3V) to (V
+ 0.3V)
CC
Output Short-Circuit Duration to V
or GND............Continuous
CC
Continuous Power Dissipation (T = +70°C)
A
6-Pin SC70 (derate 3.1mW/°C above +70°C)...............245mW
8-Pin SOT23 (derate 9.1mW/°C above +70°C).............727mW
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.
DC ELECTRICAL CHARACTERISTICS
(V
= 2.7V, GND = 0, V
= 0, V
= V /2, R = ∞ to V /2, V
= V
T = +25°C, unless otherwise noted.)
A
CC,
SHDN
CC
CM
OUT
CC
L
CC
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
5.5
UNITS
Operating Supply Voltage Range
V
Inferred from PSRR Test
2.7
V
CC
V
V
V
V
V
= 5.5V
1.3
1.2
0.6
100
7
1.8
CC
CC
CM
CM
CM
Quiescent Supply Current (Per
Amplifier)
I
mA
CC
= 2.7
Input Offset Voltage
Input Bias Current
Input Offset Current
V
= GND to V
= GND to V
= GND to V
3
mV
nA
nA
OS
CC
CC
CC
I
400
30
B
I
OS
|V - V | < 1.2V
500
8.4
IN-
IN+
Differential Input Resistance
R
kΩ
IN(Diff)
|
- V | > 1.2V
IN+
VIN-
Input Common-Mode Voltage
Range
V
Inferred from CMRR Test
GND
V
V
CM
CC
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Output Resistance
CMRR
PSRR
V
V
= GND to V
60
70
80
90
dB
dB
Ω
CM
CC
CC
= 2.7V to 5.5V
R
AV = 1V/V
0.05
OUT
VOL
CL
V
V
= 5V: R = 10kΩ
L
CC
95
84
72
= 0.4V to 4.6V
OUT
V
V
= 5V: R = 100Ω
L
CC
Large-Signal Voltage Gain
A
70
62
dB
= 0.5V to 4.5V
OUT
V
V
= 2.7V: R = 32Ω
L
CC
= 0.5V to 2.2V
OUT
V
V
V
V
V
V
V
V
- V
- V
- V
- V
100
100
220
280
100
100
190
240
CC
OH
OH
OH
OH
V
= 2.7V;
CC
R = 10kΩ
L
OL
CC
OL
CC
OL
CC
OL
400
400
V
= 2.7V;
CC
R = 32Ω
L
Output Voltage Swing
V
mV
OUT
V
= 5V;
CC
R = 10kΩ
L
350
350
V
= 5V;
CC
R = 100Ω
L
2
_______________________________________________________________________________________
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
DC ELECTRICAL CHARACTERISTICS (continued)
(V
= 2.7V, GND = 0, V
= 0, V
= V /2, R = ∞ to V /2, V
= V
T = +25°C, unless otherwise noted.)
A
CC,
SHDN
CC
CM
OUT
CC
L
CC
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
270
360
270
MAX
500
500
500
500
UNITS
V
= 2.7V;
V
V
V
V
- V
CC
CC
OH
OH
I
I
,
SOURCE
= 50mA
OL
CC
OL
SINK
Output Drive
I
mV
OUT
V
= 5V;
- V
CC
I
I
,
SOURCE
360
110
= 50mA
SINK
Short-Circuit Current
SHDN Logic Levels
SHDN Leakage Current
I
mA
V
SC
V
Normal mode
0.7 x V
IH
CC
V
Shutdown mode
0.3 x V
0.5
IL
IL
CC
I
V
= 5V, GND < V
< V
µA
µA
CC
SHDN
CC
Output Leakage Current in
Shutdown
V
V
= 5V, V
= 0, V
= 0,
CC
CC
SHDN
OUT
I
0.01
0.5
0.5
OUT(SHDN)
Shutdown Supply Current
(Per Amplifier)
I
SHDN = GND; V
= 5V
<0.04
µA
CC(SHDN)
CC
DC ELECTRICAL CHARACTERISTICS
(V
= 2.7V, GND = 0, V
= 0, V
= V /2, R = ∞ to V /2, V
= V
T = -40°C to +85°C, unless otherwise noted.)
A
CC,
CC
SHDN
CM
OUT
CC
L
CC
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
Inferred from PSRR test
MIN
TYP
MAX
UNITS
Operating Supply Voltage Range
V
2.7
5.5
V
CC
Quiescent Supply Current (Per
Amplifier)
I
V
= 5.5V
2.25
mA
CC
CC
Input Offset Voltage
Input Bias Current
Input Offset Current
V
V
V
V
= GND to V
= GND to V
= GND to V
6
mV
nA
nA
OS
CM
CM
CM
CC
CC
CC
I
600
60
B
I
OS
Input Common-Mode Voltage
Range
V
Inferred from CMRR test
GND
V
V
CM
CC
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
CMRR
PSRR
V
V
= GND to V
50
64
dB
dB
CM
CC
CC
= 2.7V to 5.5V
V
V
= 5V: R = 100Ω,
CC
L
66
56
= 0.6V to 4.4V
OUT
Large-Signal Voltage Gain
A
dB
VOL
V
V
= 2.7V: R = 32Ω,
L
CC
= 0.6V to 2.1V
OUT
_______________________________________________________________________________________
3
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
DC ELECTRICAL CHARACTERISTICS (continued)
(V
= 2.7V, GND = 0, V
= 0, V
= V /2, R = ∞ to V /2, V
= V T
= -40°C to +85°C, unless otherwise noted.)
A
CC
SHDN
CM
OUT
CC
L
CC
CC,
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
V
V
V
- V
- V
500
500
400
400
CC
OL
CC
OL
OH
V
= 2.7V;
CC
R = 32Ω
L
Output Voltage Swing
V
mV
OUT
OUT
OH
V
= 5V;
CC
R = 100Ω
L
V
= 2.7V;
V
V
V
- V
650
650
650
CC
CC
OL
CC
OH
I
I
,
SOURCE
= 50mA
SINK
Output Drive
I
mV
- V
V
= 5V;
OH
CC
I
I
,
SOURCE
V
650
= 50mA
OL
SINK
V
Normal mode
0.7 x V
IH
CC
SHDN Logic Level
V
V
Shutdown mode
0.3 x V
1
IL
IL
CC
SHDN Leakage Current
I
V
= 5V, GND < V
< V
CC
µA
µA
CC
SHDN
Output Leakage Current in
Shutdown
V
V
= 5V, V
= 0, V
= 0;
CC
CC
SHDN
OUT
I
1
1
OUT(SHDN)
Shutdown Supply Current
(Per Amplifier)
I
V
= 0; V = 5V
µA
CC(SHDN)
SHDN
CC
AC ELECTRICAL CHARACTERISTICS
(V
= 2.7V, GND = 0, V
= V /2, V
= V /2, V
= V
A
= 1V/V, C = 15pF, R = ∞ to V /2 T = +25°C, unless
CC
SHDN
A
CM
CC
OUT
CC
CC, VCL
L
L
CC ,
otherwise noted.)
PARAMETER
SYMBOL
GBWP
FBWP
SR
CONDITIONS
MIN
TYP
5
MAX
UNITS
MHz
Gain-Bandwidth Product
Full-Power Bandwidth
Slew Rate
V
= 2V , V
= 5V
280
1.8
kHz
OUT
P-P CC
V/µs
Phase Margin
PM
70
degrees
dB
Gain Margin
GM
18
f = 1kHz
0.005
0.02
V
V
= 5V, R = 100Ω,
L
CC
= 2V
OUT
P-P
f = 10kHz
V
= 5V, R = 10kΩ, V
= 2V
,
CC
L
OUT
P-P
0.003
Total Harmonic Distortion
THD
%
f = 10kHz
V
= 2.7V;
CC
f = 1kHz
0.01
0.03
R = 32Ω,
V
L
f = 10kHz
= 2V
OUT
P-P
4
_______________________________________________________________________________________
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
AC ELECTRICAL CHARACTERISTICS (continued)
(V
= +2.7V, GND = 0, V
= V /2, V
= V /2, V
= V
A
= 1V/V, C = 15pF, R = ∞ to V /2, T = +25°C, unless
CC
SHDN
A
CM
CC
OUT
CC
CC, VCL
L
L
CC
otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
µs
Settling Time to 0.01%
Crosstalk
t
2V step
= 2V ; f = 1kHz
2
100
5
S
CT
V
dB
OUT
P-P
Input Capacitance
C
pF
IN
f = 10kHz
26
Input Voltage-Noise Density
Input Current-Noise Density
e
nV/√Hz
pA/√Hz
n
f = 1kHz
f = 10kHz
0.6
I
n
f = 1kHz
Capacitive-Load Stability
Shutdown Time
No sustained oscillation
200
1
pF
µs
µs
µs
t
SHDN
Enable Time from Shutdown
Power-Up Time
t
1
ENABLE
t
5
ON
Note 1: All devices are 100% production tested at T = +25°C. All limits over temperature are guaranteed by design.
A
__________________________________________Typical Operating Characteristics
(V
CC
= 2.7V, GND = 0, V
= 0, V
= V /2, R = ∞ to V /2, V
= V
T = +25°C, unless otherwise noted.)
A
CC,
SHDN
CM
OUT
CC
L
CC
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
SUPPLY CURRENT PER AMPLIFIER
vs. TEMPERATURE
MINIMUM OPERATING VOLTAGE
vs. TEMPERATURE
1000
900
800
700
600
500
400
300
200
100
0
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
V
= 5.5V
CC
V
= 5.5V
CC
V
= 2.7V
CC
V
CC
= 2.7V
-40
-15
10
35
60
85
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
5
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
Typical Operating Characteristics (continued)
(V
CC
= 2.7V, GND = 0, V
= 0, V
= V /2, R = ∞ to V /2, V
= V
T = +25°C, unless otherwise noted.)
A
CC,
SHDN
CM
OUT
CC
L
CC
INPUT BIAS CURRENT
vs. COMMON-MODE VOLTAGE
INPUT BIAS CURRENT
vs. TEMPERATURE
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
1.0
0.8
0.6
0.4
0.2
0
200
150
100
50
100
50
V
V
= V
CC
= 5.5V
CM
CC
V
= 2.7V
V
= 5.5V
CC
CC
µMAX
0
V
V
= V
CC
= 2.7V
CM
CC
0
-50
-100
-150
-200
-50
V
CM
V
CC
= 0
= 2.7V
-0.2
-0.4
-0.6
-0.8
-1.0
-100
-150
-200
-250
SC70
V
= 0
= 5.5V
CM
CC
V
0
1
2
3
4
5
6
-40
-15
10
35
60
85
-40
-15
10
35
60
85
COMMON-MODE VOLTAGE (V)
TEMPERATURE (°C)
TEMPERATURE (°C)
COMMON-MODE REJECTION RATIO
vs. TEMPERATURE
OUTPUT LOW VOLTAGE
vs. TEMPERATURE
OUTPUT HIGH VOLTAGE
vs. TEMPERATURE
350
300
250
200
150
100
50
85
84
83
82
81
80
480
V
= 5.5V
CC
L
V
= 5.5V
CC
L
440
400
360
320
280
240
R = 100Ω
R = 100Ω
V
= 2.7V
CC
V
= 2.7V
CC
R = 100Ω
L
R = 100Ω
L
V
= 2.7V
CC
200
160
120
80
R = 100Ω
L
V
= 5.5V
V
= 5.5V
CC
CC
V
= 2.7V
CC
R = 100Ω
L
R = 100Ω
L
R = 100Ω
L
0
-40
-15
10
35
60
85
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SINKING)
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SOURCING)
(SINKING, V = 5.5V)
CC
250
200
150
100
50
250
200
150
100
50
R REFERENCED TO V
L
CC
115
105
95
V
= 5.5V
V
= 5.5V
CC
CC
R = 100kΩ
L
V
= 2.7V
CC
R = 1kΩ
L
V
= 2.7V
CC
85
75
R = 100Ω
L
65
0
55
0
0.4
0.8
1.2
0
0.1
0.2
0.3
0.4
0.5
0
1.6
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
6
_______________________________________________________________________________________
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
Typical Operating Characteristics (continued)
(V
CC
= 2.7V, GND = 0, V
= 0, V
= V /2, R = ∞ to V /2, V
= V
T = +25°C, unless otherwise noted.)
A
CC,
SHDN
CM
OUT
CC
L
CC
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
(SOURCING, V = 5.5V)
(SINKING, V = 2.7V)
(SOURCING, V = 2.7V)
CC
CC
CC
120
110
100
90
115
105
95
R REFERENCED TO V /2
R REFERENCED TO V
L CC
L
CC
110
100
90
R = 100kΩ
L
R = 100Ω
L
R = 1kΩ
L
R = 1kΩ
L
R = 100kΩ
L
85
80
R = 100Ω
L
R = 100Ω
L
75
80
70
R = 32Ω
L
65
R = 1kΩ
L
70
60
55
R = 100kΩ
L
60
50
45
R REFERENCED TO V /2
L
CC
50
35
40
0.1
0.2
0.3
0.4
0.5
0.1
0.2
0.3
0.4
0.5
0.05 0.15 0.25 0.35 0.45 0.55 0.65 0.75
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
GAIN AND PHASE vs. FREQUENCY
GAIN AND PHASE vs. FREQUENCY
(C = 200pF)
LARGE-SIGNAL GAIN vs. TEMPERATURE
L
MAX4335-8 toc18
MAX4335-8 toc17
216
180
144
70
60
50
40
30
20
10
0
216
180
144
70
60
50
40
30
20
10
0
110
100
90
A
= 1000V/V
A
= 1000V/V
VCL
VCL
V
= 2.7V
CC
108
72
108
72
R = 100kΩ
L
V
= 5V
CC
36
36
80
R = 100Ω
L
0
0
V
= 2.7V
CC
R = 32Ω
L
70
-36
-72
-108
-144
-36
-72
-10
-20
-30
-10
-20
-30
60
-108
-144
10M
50
100
1k
10k
100k
1M
10M
100
1k
10k
100k
1M
-40
-15
10
35
60
85
FREQUENCY (Hz)
FREQUENCY (Hz)
TEMPERATURE (°C)
TOTAL HARMONIC DISTORTION AND
NOISE vs. FREQUENCY
OUTPUT IMPEDANCE
vs. FREQUENCY
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
0.040
0.035
0.030
0.025
0.020
0.015
0.010
0.005
0
100
10
10
V
V
= 5V
OUT
CC
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
= 2V
P-P
500kHz LOWPASS FILTER
R = 10kΩ to V /2
L
CC
1
0.1
A
= 1
1M
V
0.01
10
100
1k
FREQUENCY (Hz)
10k
100k
1k
10k
100k
FREQUENCY (Hz)
10M
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
_______________________________________________________________________________________
7
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
____________________________Typical Operating Characteristics (continued)
(V
CC
= 2.7V, GND = 0, V
= 0, V
= V /2, R = ∞ to V /2, V
= V
T = +25°C, unless otherwise noted.)
A
CC,
SHDN
CM
OUT
CC
L
CC
CHANNEL-TO-CHANNEL ISOLATION
vs. FREQUENCY
SMALL-SIGNAL TRANSIENT RESPONSE
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. PEAK-TO-PEAK OUTPUT VOLTAGE
(NONINVERTING)
-60
10
FREQUENCY = 10kHz
-70
-80
IN
R = 100Ω
L
1
20mV/div
R = 1kΩ
L
0.1
R = 100kΩ
L
-90
OUT
20mV/div
0.01
-100
-110
0.001
10
100
1k
10k
100k
1M
10M
200ns/div
3.0
3.5
4.0
4.5
5.0
5.5
FREQUENCY (Hz)
PEAK-TO-PEAK OUTPUT VOLTAGE (V)
SMALL-SIGNAL TRANSIENT RESPONSE
(INVERTING)
LARGE-SIGNAL TRANSIENT RESPONSE
(NONINVERTING)
LARGE-SIGNAL TRANSIENT RESPONSE
(INVERTING)
V
= 5V
CC
V
= 5V
CC
IN
IN
2V/div
IN
2V/div
20mV/div
OUT
2V/div
OUT
2V/div
OUT
20mV/div
2µs/div
200ns/div
2µs/div
8
_______________________________________________________________________________________
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
Typical Application Circuit
L INPUT
V
REF
MAX4338
MUTE
R INPUT
Pin Description
PIN
MAX4337
NAME
FUNCTION
MAX4335
MAX4336
MAX4338
SOT23
µMAX
+
+
-
1
2
3
4
5
1
2
3, 5
4
3, 5
4
3, 7
4
IN1 , IN2
Noninverting Input
GND
Ground
-
3
2, 6
1, 7
—
2, 6
1, 7
—
2, 8
1, 9
—
IN2 , IN2
Inverting Input
4
OUT1, OUT2
N.C.
Output(s)
—
No Connection. Not internally connected.
Drive SHDN low for shutdown. Drive SHDN
—
5
6
—
—
5, 6
10
SHDN1, SHDN2
high or connect to V
for normal operation.
CC
6
8
8
V
CC
Positive Supply
_______________________________________________________________________________________
9
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
Applications Information
5.5V
Package Power Dissipation
Warning: Due to the high-output-current drive, this op
amp can exceed the absolute maximum power-dissi-
pation 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:
R
R
C
V
IN
= 2V
P-P
MAX4335
MAX4336
32Ω
P
≅ V
I
COS θ
IC DISS
RMS RMS
(
)
where: V
= the RMS voltage from V
when sourcing current
to V
CC OUT
Figure 1. A Circuit Example where the MAX4335/MAX4336 is
Dissipating High Power
RMS
= the RMS voltage from V
when sinking current
to V
EE
OUT
5.5V
I
= the RMS current flowing out of or into
the op amp and the load
RMS
R
θ = the phase difference between the
voltage and the current. For resistive
loads, COS θ = 1.
C
IN
V
IN
= 2V
P-P
C
C
For example, the circuit in Figure 1 has a package
power dissipation of 220mW.
MAX4335
MAX4336
R
32Ω
V
PEAK
V
≅
V
− V
−
(
)
RMS
CC
DC
C
>
1
2π R f WHERE f IS THE LOW-FREQUENCY CUTOFF
2
C
L L
L
1V
= 5.5V − 2.75V −
= 2.043V
RMS
2
Figure 2. A Circuit Example where Adding a Coupling
Capacitor Greatly Reduces the Power Dissipation of Its
Package
I
2.75V
1V/ 32Ω
PEAK
I
≅ I
+
=
+
RMS
DC
32Ω
2
2
= 108mA
RMS
Therefore, P
= V
I
COS θ
IC(DISS)
RMS RMS
Therefore, P
= V
I
COS θ = 220mW
IC(DISS)
RMS RMS
= 45mW
Adding a coupling capacitor improves the package
power dissipation because there is no DC current to
the load, as shown in Figure 2.
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.
V
PEAK
V
≅
V
− V
−
(
)
RMS
CC
DC
2
1V
2
= 5.5V − 2.75V −
= 2.043V
RMS
I
1V/ 32Ω
PEAK
I
≅ I
+
= 0A +
RMS
DC
2
2
= 22mA
RMS
10 ______________________________________________________________________________________
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
Single-Supply Speaker Driver
The MAX4335/MAX4336 can be used as a single-sup-
MAX4335–MAX4338
ply 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 resis-
tors R3 and R4, take into consideration the input bias
current as well as how much supply current can be tol-
erated. 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 capaci-
tor 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:
R3
R3 = R1 R2
R1
R2
ƒ = 1 / 2π (R C2)
L
Figure 3. Reducing Offset Error Due to Bias Current
(Noninverting)
Rail-to-Rail Input Stage
Devices in the MAX4335–MAX4338 family of high-
output-current amplifiers have rail-to-rail input and output
stages designed for low-voltage, single-supply opera-
tion. 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 volt-
ages close to the negative rail, and the NPN stage is
active for input voltages near the positive rail. The
MAX4335–MAX4338
R3
R1
switchover transition region, which occurs near V /2,
CC
R3 = R1 R2
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).
R2
Figure 4. Reducing Offset Error Due to Bias Current (Inverting)
High source impedances, together with input capaci-
tance, 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.
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 con-
nected as a voltage follower. The maximum output volt-
age swing is load dependent; however, it is guaranteed
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).
to be within 400mV of the positive rail (V
= 2.7V)
CC
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:
even with maximum load (32Ω to V /2).
CC
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.
I
= (V
- 1.2V) / 8.4kΩ
BIAS
DIFF
______________________________________________________________________________________ 11
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
4.2kΩ
4.2kΩ
Figure 5. Input Protection Circuit
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 capaci-
tive-load-driving circuit in the unity-gain configuration.
The resistor improves the circuit’s phase margin by iso-
lating the load capacitor from the op amp’s output.
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 (V
= 5V) and the outputs are
CC
placed in a high-impedance state. The device returns
to normal operation when the junction temperature falls
to below +120°C.
Power-Up and Shutdown/Mute Modes
The MAX4336/MAX4338 have a shutdown option.
When the shutdown pin (SHDN) is pulled low, supply
Short-Circuit Current Protection
The MAX4335–MAX4338 incorporate a smart short-cir-
cuit protection feature. Figure 7 shows the output volt-
age region where the protection circuitry is active. A
current drops to 0.04µA per amplifier (V
= 5V), the
CC
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).
fault condition occurs when I
> 110mA and V
OUT
>
-
OUT
OUT
1V (sinking current) or when I
> 110mA and (V
CC
V
OUT
) > 1V (sourcing current). When a fault is detect-
ed, 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).
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.
12 ______________________________________________________________________________________
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
V
OUT
V
CC
IN SOURCE MODE, SHORT-CIRCUIT PROTECTION CIRCUITRY IS NOT
ACTIVATED FOR (V - V ) < 1V. OUTPUT CURRENT CAN SAFELY
CC
OUT
IN
(1V/div)
EXCEED 110mA.
V
- 1V
CC
SHORT-CIRCUIT PROTECTION CIRCUITRY
LIMITS OUTPUT CURRENT TO 110mA
OUT
(1V/div)
1V
0
IN SINK MODE, SHORT-CIRCUIT PROTECTION CIRCUITRY IS NOT
ACTIVATED FOR V
EXCEED 110mA.
< 1V. OUTPUT CURRENT CAN SAFELY
OUT
Figure 7. Short-Circuit Protection
Figure 6. Rail-to-Rail Input/Output Range
1300
V
= 5.0V
CC
V
= 3.0V, C = 330pF
CC L
L ISO
CC
1200
1100
1000
900
800
700
R to V /2
L
R = 100kΩ, R = 0
IN
UNSTABLE REGION
(20mV/div)
600
500
400
300
200
100
OUT
(20mV/div)
STABLE REGION
0
1µs/div
10
100
1k
10k
100k
RESISTIVE LOAD (Ω)
Figure 8. Capacitive-Load Stability
Figure 9. Small-Signal Transient Response with Excessive
Capacitive Load
______________________________________________________________________________________ 13
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
V
= 3.0V, C = 330pF
L
CC
R = 100kΩ, R = 39Ω
L
ISO
IN
R
ISO
(20mV/div)
MAX4336
C
L
OUT
(20mV/div)
1µs/div
Figure 10. Small-Signal Transient Response with Excessive
Capacitive Load with Isolation Resistor
Figure 11. Capacitive-Load-Driving Circuit
V
CC
1V/div
SHDN
1V/div
OUT
1V/div
OUT
2V/div
5µs/div
5µs/div
Figure 12. Shutdown Output Voltage Enable/Disable
Figure 13. Power-Up/Down Output Voltage
14 ______________________________________________________________________________________
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
Pin Configurations
TOP VIEW
+
OUT1
IN1-
1
2
3
4
8
7
6
5
V
CC
OUT1
IN1-
1
2
3
4
5
10
9
V
CC
IN
1
2
3
6
5
4
V
CC
OUT2
IN2-
OUT2
IN2-
MAX4335
MAX4336
MAX4338
MAX4337
IN1+
8
GND
SHDN (N.C.)
OUT
IN1+
GND
7
IN2+
GND
IN2+
-
SHDN1
6
SHDN2
IN
µMAX
SOT23/µMAX
SC70
( ) MAX4335 ONLY
___________________Chip Information
MAX4335 TRANSISTOR COUNT: 1200
MAX4336 TRANSISTOR COUNT: 1200
MAX4337 TRANSISTOR COUNT: 2400
MAX4338 TRANSISTOR COUNT: 2400
PROCESS: BiCMOS
______________________________________________________________________________________ 15
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
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.)
4X S
8
8
MILLIMETERS
INCHES
DIM MIN
MAX
MAX
MIN
-
-
0.043
0.006
0.037
0.014
0.007
0.120
1.10
0.15
0.95
0.36
0.18
3.05
A
0.002
0.030
0.010
0.005
0.116
0.05
0.75
0.25
0.13
2.95
A1
A2
b
E
H
ÿ 0.50±0.1
c
D
e
0.0256 BSC
0.65 BSC
0.6±0.1
E
H
0.116
0.188
0.016
0∞
0.120
2.95
4.78
0.41
0∞
3.05
5.03
0.66
6∞
0.198
0.026
6∞
L
1
1
α
S
0.6±0.1
0.0207 BSC
0.5250 BSC
D
BOTTOM VIEW
TOP VIEW
A1
A2
A
c
α
e
L
b
SIDE VIEW
FRONT VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 8L uMAX/uSOP
APPROVAL
DOCUMENT CONTROL NO.
REV.
1
21-0036
J
1
16 ______________________________________________________________________________________
SC70/SOT23-8, 50mA I , Rail-to-Rail I/O
OUT
Op Amps with Shutdown/Mute
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.)
e
4X S
10
10
INCHES
DIM MIN
MAX
MILLIMETERS
MIN
-
MAX
1.10
0.15
0.95
3.05
3.00
3.05
3.00
5.05
0.70
A
-
0.043
0.006
0.037
0.120
0.118
0.120
0.118
0.199
A1
A2
D1
D2
E1
E2
H
0.002
0.030
0.116
0.114
0.116
0.114
0.187
0.05
0.75
2.95
2.89
2.95
2.89
4.75
0.40
H
ÿ 0.50±0.1
0.6±0.1
L
0.0157 0.0275
0.037 REF
L1
b
0.940 REF
0.007
0.0106
0.177
0.090
0.270
1
1
e
0.0197 BSC
0.500 BSC
0.6±0.1
c
0.0035 0.0078
0.0196 REF
0.200
BOTTOM VIEW
E2
0.498 REF
S
TOP VIEW
D2
α
0∞
6∞
0∞
6∞
GAGE PLANE
A2
c
A
E1
b
L
α
A1
D1
L1
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 10L uMAX/uSOP
APPROVAL
DOCUMENT CONTROL NO.
REV.
1
21-0061
I
1
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.
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