Maxim MAX4336 Sc70/sot23-8, 50ma iout, rail-to-rail i/o op amps with shutdown/mute Datasheet

19-2136; Rev 1; 9/01
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
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
Ordering Information
TEMP RANGE
PINPACKAGE
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
—
PART
TOP
MARK
Pin Configurations appear at end of data sheet.
Typical Operating Circuit
VCC
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
0.005
RL = 10kΩ,
VCC = 5V
VOUT = 2VP-P
R3
C1
VIN
THD + NOISE (%)
C2
MAX4335
MAX4336
R4
32Ω
0.004
0.003
R2
R1
C3
0.002
10
100
1k
10k
100k
FREQUENCY (Hz)
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
________________________________________________________________ Maxim Integrated Products
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.
1
MAX4335–MAX4338
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.
MAX4335–MAX4338
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC to GND) ..................................-0.3V to +6V
All Other Pins to GND ....................(GND - 0.3V) to (VCC + 0.3V)
Output Short-Circuit Duration to VCC or GND ............Continuous
Continuous Power Dissipation (TA = +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
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
(VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = ∞ to VCC/2, VSHDN = VCC, TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
Inferred from PSRR Test
2.7
TYP
MAX
UNITS
5.5
V
Operating Supply Voltage Range
VCC
Quiescent Supply Current (Per
Amplifier)
ICC
Input Offset Voltage
VOS
VCM = GND to VCC
±0.6
±3
IB
VCM = GND to VCC
±100
±400
nA
IOS
VCM = GND to VCC
±7
±30
nA
|VIN- - VIN+| < 1.2V
500
|VIN- - VIN+| > 1.2V
8.4
Input Bias Current
Input Offset Current
Differential Input Resistance
Input Common-Mode Voltage
Range
RIN(Diff)
VCM
VCC = 5.5V
1.3
VCC = 2.7
1.2
Inferred from CMRR Test
GND
Common-Mode Rejection Ratio
CMRR
VCM = GND to VCC
60
Power-Supply Rejection Ratio
PSRR
VCC = 2.7V to 5.5V
70
Output Resistance
ROUT
AVCL = 1V/V
VCC = 5V: RL = 10kΩ
VOUT = 0.4V to 4.6V
Large-Signal Voltage Gain
AVOL
Output Voltage Swing
VOUT
2
90
dB
0.05
Ω
95
VCC = 2.7V: RL = 32Ω
VOUT = 0.5V to 2.2V
62
72
VCC = 5V;
RL = 100Ω
V
dB
84
VCC = 5V;
RL = 10kΩ
mV
80
70
VCC = 2.7V;
RL = 32Ω
mA
kΩ
VCC
VCC = 5V: RL = 100Ω
VOUT = 0.5V to 4.5V
VCC = 2.7V;
RL = 10kΩ
1.8
dB
VCC - VOH
100
VOL
100
VCC - VOH
220
400
VOL
280
400
VCC - VOH
100
VOL
100
VCC - VOH
190
350
VOL
240
350
_______________________________________________________________________________________
mV
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
MAX4335–MAX4338
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = ∞ to VCC/2, VSHDN = VCC, TA = +25°C, unless otherwise noted.)
PARAMETER
Output Drive
SYMBOL
CONDITIONS
MIN
TYP
MAX
VCC = 2.7V;
ISOURCE,
ISINK = 50mA
VCC - VOH
270
500
VOL
360
500
VCC = 5V;
ISOURCE,
ISINK = 50mA
VCC - VOH
270
500
VOL
360
500
IOUT
Short-Circuit Current
mV
ISC
110
VIH
Normal mode
VIL
Shutdown mode
IIL
VCC = 5V, GND < VSHDN < VCC
Output Leakage Current in
Shutdown
IOUT(SHDN)
VCC = 5V, VSHDN = 0, VOUT = 0,
VCC
Shutdown Supply Current
(Per Amplifier)
ICC(SHDN)
SHDN = GND; VCC = 5V
SHDN Logic Levels
SHDN Leakage Current
UNITS
mA
0.7 x VCC
0.3 x VCC
V
0.5
µA
0.01
0.5
µA
<0.04
0.5
µA
DC ELECTRICAL CHARACTERISTICS
(VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = ∞ to VCC/2, VSHDN = VCC, TA = -40°C to +85°C, unless otherwise noted.)
(Note 1)
PARAMETER
SYMBOL
Operating Supply Voltage Range
VCC
Inferred from PSRR test
Quiescent Supply Current (Per
Amplifier)
ICC
VCC = 5.5V
Input Offset Voltage
VOS
Input Bias Current
CONDITIONS
MIN
MAX
UNITS
5.5
V
2.25
mA
VCM = GND to VCC
±6
mV
2.7
TYP
IB
VCM = GND to VCC
±600
nA
Input Offset Current
IOS
VCM = GND to VCC
±60
nA
Input Common-Mode Voltage
Range
VCM
Inferred from CMRR test
VCC
V
GND
Common-Mode Rejection Ratio
CMRR
VCM = GND to VCC
50
dB
Power-Supply Rejection Ratio
PSRR
VCC = 2.7V to 5.5V
64
dB
VCC = 5V: RL = 100Ω,
VOUT = 0.6V to 4.4V
66
VCC = 2.7V: RL = 32Ω,
VOUT = 0.6V to 2.1V
56
Large-Signal Voltage Gain
AVOL
dB
_______________________________________________________________________________________
3
MAX4335–MAX4338
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = ∞ to VCC/2, VSHDN = VCC, TA = -40°C to +85°C, unless otherwise noted.)
(Note 1)
PARAMETER
Output Voltage Swing
Output Drive
SHDN Logic Level
SHDN Leakage Current
SYMBOL
VOUT
CONDITIONS
MIN
TYP
MAX
VCC - VOH
500
VOL
500
VCC = 5V;
RL = 100Ω
VCC - VOH
400
VOL
400
VCC = 2.7V;
ISOURCE,
ISINK = 50mA
VCC - VOH
650
VOL
650
VCC = 5V;
ISOURCE,
ISINK = 50mA
VCC - VOH
650
VOL
650
VCC = 2.7V;
RL = 32Ω
IOUT
UNITS
mV
mV
VIH
Normal mode
VIL
Shutdown mode
0.7 x VCC
IIL
0.3 x VCC
V
VCC = 5V, GND < VSHDN < VCC
1
µA
Output Leakage Current in
Shutdown
V
= 5V, VSHDN = 0, VOUT = 0;
IOUT(SHDN) CC
VCC
1
µA
Shutdown Supply Current
(Per Amplifier)
ICC(SHDN) VSHDN = 0; VCC = 5V
1
µA
AC ELECTRICAL CHARACTERISTICS
(VCC = 2.7V, GND = 0, VCM = VCC/2, VOUT = VCC/2, VSHDN = VCC, AVCL = 1V/V, CL = 15pF, RL = ∞ to VCC/2, TA = +25°C, unless
otherwise noted.)
PARAMETER
SYMBOL
Gain-Bandwidth Product
GBWP
Full-Power Bandwidth
FBWP
CONDITIONS
TYP
5
VOUT = 2VP-P, VCC = 5V
MAX
UNITS
MHz
280
kHz
SR
1.8
V/µs
Phase Margin
PM
70
degrees
Gain Margin
GM
18
dB
Slew Rate
VCC = 5V, RL = 100Ω,
VOUT = 2VP-P
Total Harmonic Distortion
4
MIN
THD
f = 1kHz
0.005
f = 10kHz
0.02
VCC = 5V, RL = 10kΩ, VOUT = 2VP-P,
f = 10kHz
VCC = 2.7V;
f = 1kHz
RL = 32Ω,
f = 10kHz
VOUT = 2VP-P
0.003
0.01
0.03
_______________________________________________________________________________________
%
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
MAX4335–MAX4338
AC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.7V, GND = 0, VCM = VCC/2, VOUT = VCC/2, VS HDN = VCC, AVCL = 1V/V, CL = 15pF, RL = ∞ to VCC/2, TA = +25°C, unless
otherwise noted.)
PARAMETER
SYMBOL
Settling Time to 0.01%
CONDITIONS
tS
2V step
Crosstalk
CT
VOUT = 2VP-P; f = 1kHz
Input Capacitance
CIN
Input Voltage-Noise Density
en
Input Current-Noise Density
In
MIN
TYP
f = 10kHz
dB
5
pF
nV/√Hz
0.6
pA/√Hz
f = 1kHz
No sustained oscillation
Enable Time from Shutdown
100
26
f = 10kHz
UNITS
µs
f = 1kHz
Capacitive-Load Stability
Shutdown Time
MAX
2
200
pF
tSHDN
1
µs
tENABLE
1
µs
tON
5
µs
Power-Up Time
Note 1: All devices are 100% production tested at TA = +25°C. All limits over temperature are guaranteed by design.
__________________________________________Typical Operating Characteristics
(VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = ∞ to VCC/2, VS HDN = VCC, TA = +25°C, unless otherwise noted.)
1.2
VCC = 2.7V
1.1
2.1
2.0
1.9
1.8
1.7
-15
10
35
TEMPERATURE (°C)
60
85
800
700
600
VCC = 5.5V
500
400
300
VCC = 2.7V
100
0
1.5
-40
900
200
1.6
1.0
MAX4335-8 toc03
2.2
SUPPLY CURRENT (pA)
VCC = 5.5V
1000
MAX4335-8 toc02
MAX4335-8 toc01
1.3
2.3
MINIMUM OPERATING VOLTAGE (V)
SUPPLY CURRENT (mA)
1.4
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MINIMUM OPERATING VOLTAGE
vs. TEMPERATURE
SUPPLY CURRENT PER AMPLIFIER
vs. TEMPERATURE
-40
-15
10
35
TEMPERATURE (°C)
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
_______________________________________________________________________________________
5
Typical Operating Characteristics (continued)
(VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = ∞ to VCC/2, VS HDN = VCC, TA = +25°C, unless otherwise noted.)
INPUT BIAS CURRENT
vs. COMMON-MODE VOLTAGE
0.4
0.2
0
-0.2
-0.4
VCC = 5.5V
50
0
-50
-100
SC70
-0.6
200
50
VCM = VCC
VCC = 2.7V
0
-50
VCM = 0
VCC = 2.7V
-100
-150
VCM = 0
VCC = 5.5V
-200
-200
-15
10
35
60
-250
0
85
1
2
3
4
5
-40
6
10
35
60
TEMPERATURE (°C)
COMMON-MODE REJECTION RATIO
vs. TEMPERATURE
OUTPUT LOW VOLTAGE
vs. TEMPERATURE
OUTPUT HIGH VOLTAGE
vs. TEMPERATURE
83
82
VCC = 5.5V
RL = 100Ω
440
81
VCC = 2.7V
RL = 100Ω
400
360
320
280
240
200
VCC = 2.7V
RL = 100Ω
VCC = 5.5V
RL = 100Ω
160
350
80
-15
10
35
60
85
200
150
100
VCC = 5.5V
RL = 100Ω
VCC = 2.7V
RL = 100Ω
0
-40
85
VCC = 2.7V
RL = 100Ω
250
50
120
80
VCC = 5.5V
RL = 100Ω
300
OUTPUT HIGH VOLTAGE (mV)
MAX4335-8 toc07
84
480
MAX4335-8 toc08
COMMON-MODE VOLTAGE (V)
85
-40
-15
TEMPERATURE (°C)
OUTPUT LOW VOLTAGE (mV)
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SINKING)
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SOURCING)
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
(SINKING, VCC = 5.5V)
VCC = 5.5V
150
VCC = 2.7V
100
50
150
VCC = 2.7V
100
0.4
0.8
OUTPUT VOLTAGE (V)
1.2
1.6
95
RL = 1kΩ
85
75
65
55
0
0
RL = 100kΩ
105
RL = 100Ω
50
0
RL REFERENCED TO VCC
115
LARGE-SIGNAL GAIN (dB)
200
OUTPUT CURRENT (mA)
200
250
MAX4335 toc11
VCC = 5.5V
MAX4335 toc10
250
MAX4335 toc12
CMRR (dB)
100
-150
-1.0
6
VCM = VCC
VCC = 5.5V
150
-0.8
MAX4335-8 toc06
VCC = 2.7V
INPUT BIAS CURRENT (nA)
µMAX
0.6
100
MAX4335 toc05
INPUT OFFSET VOLTAGE (mV)
0.8
INPUT BIAS CURRENT (nA)
MAX4335-8 toc04
1.0
INPUT BIAS CURRENT
vs. TEMPERATURE
MAX4335-8 toc09
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
OUTPUT CURRENT (mA)
MAX4335–MAX4338
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
0
0.2
0.4 0.6 0.8 1.0 1.2
OUTPUT VOLTAGE (V)
1.4
1.6
0
0.1
0.2
0.3
OUTPUT VOLTAGE (V)
_______________________________________________________________________________________
0.4
0.5
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
100
90
RL = 100Ω
80
70
RL REFERENCED TO VCC
105
RL = 100kΩ
60
95
RL = 100kΩ
85
RL = 100Ω
75
65
RL = 1kΩ
55
90
RL = 100kΩ
RL = 100Ω
RL = 1kΩ
80
70
RL = 32Ω
60
45
50
35
40
0.5
0.1
LARGE-SIGNAL GAIN vs. TEMPERATURE
100
GAIN (dB)
VCC = 5V
RL = 100Ω
80
VCC = 2.7V
RL = 32Ω
70
60
50
-15
10
35
60
0.5
0.05 0.15 0.25 0.35 0.45 0.55 0.65 0.75
GAIN AND PHASE vs. FREQUENCY
GAIN AND PHASE vs. FREQUENCY
(CL = 200pF)
MAX4335-8 toc17
MAX4335-8 toc18
70
180
60
50
144
50
144
40
108
40
108
30
72
30
72
20
36
20
36
10
0
AVCL = 1000V/V
AVCL = 1000V/V
180
10
0
0
-36
0
-36
-10
-72
-10
-72
-108
-20
-108
-20
-30
-144
10M
-30
1k
10k
100k
1M
100
1k
10k
100k
1M
-144
10M
TEMPERATURE (°C)
FREQUENCY (Hz)
FREQUENCY (Hz)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
OUTPUT IMPEDANCE
vs. FREQUENCY
TOTAL HARMONIC DISTORTION AND
NOISE vs. FREQUENCY
-20
-30
-40
-50
-60
-70
-80
-90
10
1
AV = 1
0.1
MAX4335/8 toc21
0.040
VCC = 5V
VOUT = 2VP-P
500kHz LOWPASS FILTER
RL = 10kΩ to VCC/2
0.035
0.030
THD + NOISE (%)
-10
100
MAX4335-8 toc20
MAX4335-8 toc19
10
0
216
216
100
85
OUTPUT IMPEDANCE (Ω)
-40
0.4
OUTPUT VOLTAGE (V)
60
VCC = 2.7V
RL = 100kΩ
90
0.3
OUTPUT VOLTAGE (V)
70
MAX4335 toc16
110
0.2
GAIN (dB)
0.2
0.3
0.4
OUTPUT VOLTAGE (V)
PHASE (DEGREES)
0.1
LARGE-SIGNAL GAIN (dB)
100
RL REFERENCED TO VCC/2
50
PSRR (dB)
110
0.025
0.020
0.015
0.010
0.005
-100
-110
0
0.01
100
1k
10k
100k
FREQUENCY (Hz)
1M
10M
1k
10k
100k
FREQUENCY (Hz)
1M
10M
10
100
1k
10k
100k
FREQUENCY (Hz)
_______________________________________________________________________________________
7
PHASE (DEGREES)
RL = 1kΩ
LARGE-SIGNAL GAIN (dB)
LARGE-SIGNAL GAIN (dB)
110
115
LARGE-SIGNAL GAIN (dB)
RL REFERENCED TO VCC/2
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
(SOURCING, VCC = 2.7V)
MAX4335 toc14
MAX4335 toc13
120
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
(SINKING, VCC = 2.7V)
MAX4335 toc15
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
(SOURCING, VCC = 5.5V)
MAX4335–MAX4338
Typical Operating Characteristics (continued)
(VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = ∞ to VCC/2, VS HDN = VCC, TA = +25°C, unless otherwise noted.)
____________________________Typical Operating Characteristics (continued)
(VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = ∞ to VCC/2, VS HDN = VCC, TA = +25°C, unless otherwise noted.)
CHANNEL-TO-CHANNEL ISOLATION
vs. FREQUENCY
RL = 100Ω
1
RL = 1kΩ
0.1
RL = 100kΩ
0.01
-60
MAX4335/8 toc23
FREQUENCY = 10kHz
CHANNEL-TO-CHANNEL ISOLATION
MAX4335 toc22
10
SMALL-SIGNAL TRANSIENT RESPONSE
(NONINVERTING)
-70
IN
20mV/div
-80
-90
OUT
20mV/div
-100
-110
3.5
4.0
4.5
5.0
10
5.5
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
SMALL-SIGNAL TRANSIENT RESPONSE
(INVERTING)
LARGE-SIGNAL TRANSIENT RESPONSE
(NONINVERTING)
MAX4335 toc25
PEAK-TO-PEAK OUTPUT VOLTAGE (V)
VCC = 5V
200ns/div
LARGE-SIGNAL TRANSIENT RESPONSE
(INVERTING)
VCC = 5V
IN
20mV/div
IN
2V/div
IN
2V/div
OUT
20mV/div
OUT
2V/div
OUT
2V/div
200ns/div
2µs/div
_______________________________________________________________________________________
2µs/div
MAX4335 toc27
3.0
MAX4335 toc26
0.001
8
MAX4335 toc24
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. PEAK-TO-PEAK OUTPUT VOLTAGE
THD + NOISE (%)
MAX4335–MAX4338
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
L INPUT
VREF
MAX4338
MUTE
R INPUT
Pin Description
PIN
NAME
MAX4337
MAX4335
MAX4336
FUNCTION
MAX4338
SOT23
µMAX
+
+
IN1 , IN2
1
1
3, 5
3, 5
3, 7
2
2
4
4
4
3
3
2, 6
2, 6
2, 8
GND
IN2 , IN2
4
4
1, 7
1, 7
1, 9
OUT1, OUT2
5
—
—
—
—
N.C.
—
5
—
—
5, 6
SHDN1, SHDN2
6
6
8
8
10
VCC
Noninverting Input
Ground
Inverting Input
Output(s)
No Connection. Not internally connected.
Drive SHDN low for shutdown. Drive SHDN
high or connect to VCC for normal operation.
Positive Supply
_______________________________________________________________________________________
9
MAX4335–MAX4338
Typical Application Circuit
MAX4335–MAX4338
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
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-dissipation rating. As a general rule, as long as the peak current 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
C
VIN = 2VP-P
MAX4335
MAX4336
R
32Ω
PIC(DISS) ≅ VRMS IRMS COS θ
where: VRMS = the RMS voltage from VCC to VOUT
when sourcing current
= the RMS voltage from V OUT to V EE
when sinking current
IRMS = 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.
Figure 1. A Circuit Example where the MAX4335/MAX4336 is
Dissipating High Power
5.5V
R
CIN
VIN = 2VP-P
For example, the circuit in Figure 1 has a package
power dissipation of 220mW.
(
)
CC >
1V
= 2.043VRMS
2
2.75V
1V / 32Ω
=
+
32Ω
2
2
= 108mARMS
Therefore, PIC(DISS) = VRMS IRMS 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.
(
)
VPEAK
VRMS ≅ VCC − VDC −
2
= 5.5V − 2.75V −
1V
= 2.043VRMS
2
I
IRMS ≅ IDC + PEAK
2
= 22mARMS
10
MAX4335
MAX4336
32Ω
2
= 5.5V − 2.75V −
IRMS ≅ IDC +
R
VPEAK
VRMS ≅ VCC − VDC −
IPEAK
CC
= 0A +
1
2π RL fL WHERE fL IS THE LOW-FREQUENCY CUTOFF
Figure 2. A Circuit Example where Adding a Coupling
Capacitor Greatly Reduces the Power Dissipation of Its
Package
Therefore, PIC(DISS) = VRMS IRMS 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.
1V / 32Ω
2
______________________________________________________________________________________
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
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:
IBIAS = (VDIFF - 1.2V) / 8.4kΩ
MAX4335–MAX4338
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)
MAX4335–MAX4338
R3
R3 = R1
R2
R1
R2
Figure 3. Reducing Offset Error Due to Bias Current
(Noninverting)
MAX4335–MAX4338
R3
R3 = R1
R2
R1
R2
Figure 4. Reducing Offset Error Due to Bias Current (Inverting)
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.
______________________________________________________________________________________
11
MAX4335–MAX4338
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
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 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.
12
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 IOUT > 110mA and VOUT >
1V (sinking current) or when IOUT > 110mA and (VCC VOUT) > 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).
______________________________________________________________________________________
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
MAX4335–MAX4338
VOUT
VCC
IN SOURCE MODE, SHORT-CIRCUIT PROTECTION CIRCUITRY IS NOT
ACTIVATED FOR (VCC - VOUT) < 1V. OUTPUT CURRENT CAN SAFELY
EXCEED 110mA.
IN
(1V/div)
VCC - 1V
SHORT-CIRCUIT PROTECTION CIRCUITRY
LIMITS OUTPUT CURRENT TO 110mA
OUT
(1V/div)
1V
IN SINK MODE, SHORT-CIRCUIT PROTECTION CIRCUITRY IS NOT
ACTIVATED FOR VOUT < 1V. OUTPUT CURRENT CAN SAFELY
EXCEED 110mA.
0
CAPACITIVE LOAD (pF)
MAX4335-fig07
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
VCC = 5.0V
RL to VCC/2
IN
(20mV/div)
UNSTABLE REGION
OUT
(20mV/div)
STABLE REGION
10
100
VCC = 3.0V, CL = 330pF
RL = 100kΩ, RISO = 0
MAX4335-fig08
Figure 7. Short-Circuit Protection
Figure 6. Rail-to-Rail Input/Output Range
1k
10k
100k
1µs/div
RESISTIVE LOAD (Ω)
Figure 8. Capacitive-Load Stability
Figure 9. Small-Signal Transient Response with Excessive
Capacitive Load
______________________________________________________________________________________
13
VCC = 3.0V, CL = 330pF
RL = 100kΩ, RISO = 39Ω
IN
(20mV/div)
RISO
MAX4336
CL
OUT
(20mV/div)
1µs/div
Figure 11. Capacitive-Load-Driving Circuit
MAX4335-fig12
Figure 10. Small-Signal Transient Response with Excessive
Capacitive Load with Isolation Resistor
MAX4335-fig11
MAX4335–MAX4338
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
VCC
1V/div
SHDN
1V/div
OUT
1V/div
OUT
2V/div
5µs/div
Figure 12. Shutdown Output Voltage Enable/Disable
14
5µs/div
Figure 13. Power-Up/Down Output Voltage
______________________________________________________________________________________
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
TOP VIEW
IN+ 1
GND 2
IN
-
6
MAX4335
MAX4336
3
VCC
OUT1 1
IN1- 2
5
4
SHDN (N.C.)
OUT
SC70
8
VCC
7
OUT2
MAX4337
IN1+ 3
6
IN2-
GND 4
5
IN2+
SOT23/µMAX
10 VCC
OUT1 1
IN1-
2
IN1+
3
GND
SHDN1
9
OUT2
8
IN2-
4
7
IN2+
5
6
SHDN2
MAX4338
µMAX
( ) MAX4335 ONLY
___________________Chip Information
MAX4335 TRANSISTOR COUNT: 1200
MAX4336 TRANSISTOR COUNT: 1200
MAX4337 TRANSISTOR COUNT: 2400
MAX4338 TRANSISTOR COUNT: 2400
PROCESS: BiCMOS
______________________________________________________________________________________
15
MAX4335–MAX4338
Pin Configurations
Package Information
4X S
8
E
ÿ 0.50±0.1
8
INCHES
DIM
A
A1
A2
b
H
c
D
e
E
H
0.6±0.1
1
L
1
α
0.6±0.1
S
BOTTOM VIEW
D
MIN
0.002
0.030
MAX
0.043
0.006
0.037
0.014
0.010
0.007
0.005
0.120
0.116
0.0256 BSC
0.120
0.116
0.198
0.188
0.026
0.016
6∞
0∞
0.0207 BSC
8LUMAXD.EPS
(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.)
MILLIMETERS
MAX
MIN
0.05
0.75
1.10
0.15
0.95
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∞
6∞
0.5250 BSC
TOP VIEW
A1
A2
e
FRONT VIEW
A
α
c
b
L
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 8L uMAX/uSOP
APPROVAL
DOCUMENT CONTROL NO.
21-0036
REV.
J
1
1
SOT23, 8L.EPS
MAX4335–MAX4338
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
16
______________________________________________________________________________________
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
10LUMAX.EPS
e
4X S
10
INCHES
10
H
ÿ 0.50±0.1
0.6±0.1
1
1
0.6±0.1
BOTTOM VIEW
TOP VIEW
D2
MILLIMETERS
MAX
DIM MIN
0.043
A
0.002
0.006
A1
A2
0.030
0.037
0.116
0.120
D1
D2
0.114
0.118
E1
0.116
0.120
0.118
E2
0.114
0.199
H
0.187
L
0.0157 0.0275
L1
0.037 REF
b
0.007
0.0106
e
0.0197 BSC
c
0.0035 0.0078
0.0196 REF
S
α
0∞
6∞
MAX
MIN
1.10
0.05
0.15
0.75
0.95
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
0∞
6∞
E2
GAGE PLANE
A2
c
A
b
D1
A1
α
FRONT VIEW
E1
L
L1
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 10L uMAX/uSOP
APPROVAL
DOCUMENT CONTROL NO.
21-0061
REV.
I
1
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.
MAX4335–MAX4338
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.)