General Description
The MAX4230–MAX4234 single/dual/quad, high-outputdrive CMOS op amps feature 200mA of peak output
current, rail-to-rail input, and output capability from a
single 2.7V to 5.5V supply. These amplifiers exhibit a
high slew rate of 10V/µs and a gain-bandwidth product
(GBWP) of 10MHz. The MAX4230–MAX4234 can drive
typical headset levels (32Ω), as well as bias an RF
power amplifier (PA) in wireless handset applications.
The MAX4230 comes in a tiny 5-pin SC70 package and
the MAX4231, single with shutdown, is offered in a
6-pin SC70 package and in 1.5mm x 1.0mm UCSP and
thin µDFN packages. The dual op-amp MAX4233 is
offered in the space-saving 10-bump chip-scale package (UCSP™), providing the smallest footprint area for
a dual op amp with shutdown.
These op amps are designed to be part of the PA control circuitry, biasing RF PAs in wireless headsets. The
MAX4231/MAX4233 offer a SHDN feature that drives
the output low. This ensures that the RF PA is fully disabled when needed, preventing unconverted signals to
the RF antenna.
The MAX4230 family offers low offsets, wide bandwidth,
and high-output drive in a tiny 2.1mm x 2.0mm spacesaving SC70 package. These parts are offered over the
automotive temperature range (-40°C to +125°C).
Applications
RF PA Biasing Controls in Handset Applications
Portable/Battery-Powered Audio Applications
Portable Headphone Speaker Drivers (32Ω)
Audio Hands-Free Car Phones (Kits)
Laptop/Notebook Computers/TFT Panels
Sound Ports/Cards
Set-Top Boxes
Digital-to-Analog Converter Buffers
Transformer/Line Drivers
Motor Drivers
Features
o 200mA Output Drive Capability
o Rail-to-Rail Input and Output
o 1.1mA Supply Current per Amplifier
o 2.7V to 5.5V Single-Supply Operation
o 10MHz Gain-Bandwidth Product
o High Slew Rate: 10V/µs
o 100dB Voltage Gain (R
L
= 100kΩ)
o 85dB Power-Supply Rejection Ratio
o No Phase Reversal for Overdriven Inputs
o Unity-Gain Stable for Capacitive Loads to 780pF
o Low-Power Shutdown Mode Reduces Supply
Current to < 1µA
o Available in 5-Pin SC70 Package (MAX4230)
and 6-Pin, UCSP and Thin µDFN Packages
(MAX4231)
o Available in 10-Bump UCSP Package (MAX4233)
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
________________________________________________________________
Maxim Integrated Products
1
19-2164; Rev 15; 3/12
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
Pin Configurations appear at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
Ordering Information
+
Denotes a lead-free(Pb)/RoHS-compliant package.
T = Tape and reel.
Typical Operating Circuit
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
PART
MAX4230AXK+T -40°C to +125°C 5 SC70 ACS
MAX4230AUK+T -40°C to +125°C 5 SOT23 ABZZ
MAX4231AXT+T -40°C to +125°C 6 SC70 ABA
MAX4231AUT+T -40°C to +125°C 6 SOT23 ABNF
MAX4231ART+T -40°C to +125°C 6 UCSP AAM
MAX4231AYT+T -40°C to +125°C 6 Thin µDFN +AH
TEMP RANGE
PINPACKAGE
TOP
M ARK
ANTENNA
DAC
RR
2.7V TO 5.5V
MAX4231
SHDN
C
F
PA
I
= 30mA
R
ISO
OUT
C
LOAD
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
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 (VDDto VSS)....................................................6V
All Other Pins ...................................(V
SS
- 0.3V) to (VDD+ 0.3V)
Output Short-Circuit Duration to V
DD
or VSS(Note 1) ................10s
Continuous Power Dissipation (Multilayer, T
A
= +70°C)
5-Pin SC70 (derate 3.1mW/°C above +70°C)..............247mW
5-Pin SOT23 (derate 3.9mW/°C above +70°C)............313mW
6-Pin SC70 (derate 3.1mW/°C above +70°C)..............245mW
6-Pin SOT23 (derate 13.4mW/°C above +70°C)........1072mW
6-Pin Thin µDFN (derate 2.1mW/°C above +70°C)...170.2mW
6-Bump UCSP (derate 3.9mW/°C above +70°C) .....308.3mW
8-Pin SOT23 (derate 5.1mW/°C above +70°C).........408.2mW
8-Pin µMAX
®
(derate 4.8mW/°C above +70°C) .......387.8mW
10-Pin µMAX (derate 8.8mW/°C above +70°C) .......707.3mW
10-Bump UCSP (derate 5.6mW/°C above +70°C) .....448.7mW
14-Pin SO (derate 11.9mW/°C above +70°C) ..........952.4mW
14-Pin TSSOP (derate 10mW/°C above +70°C) ......796.8mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature
(excluding 6 and 10 UCSP, soldering, 10s) ................+300°C
Soldering Temperature (reflow) .......................................+260°C
Note 1: Package power dissipation should also be observed.
)
DC ELECTRICAL CHARACTERISTICS
(VDD= 2.7V, VSS= 0V, VCM= VDD/2, V
OUT
= (VDD/2), RL= ∞ connected to (VDD/2), V
SHDN
= VDD, TA= +25°C, unless otherwise
noted.) (Note 2)
µMAX is a registered trademark of Maxim Integrated Products, Inc.
- V
- V
- V
VDD - V
V
VDD - V
V
0.85 ±6mV
1pA
50 pA
1000 MΩ
SS
V
DD
52 70 dB
OH
SS
OH
SS
OH
SS
OL
OL
- V
- V
OH
SS
OH
SS
400 500
360 500
80 120
70 120
814
714
128 200
112 175
240 320
224 300
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Supply Voltage Range V
Input Offset Voltage V
Input Bias Current (Note 4) I
Input Offset Current I
Input Resistance R
Common-Mode Input Voltage
Range
Common-Mode Rejection Ratio CMRR VSS < VCM < V
Power-Supply Rejection Ratio PSRR VDD = 2.7V to 5.5V 73 85 dB
Shutdown Output Impedance R
Output Voltage in Shutdown V
Output Voltage Swing V
Output Source/Sink Current I
Output Voltage
DD
OS
OS
V
CM
OUT
OUT(SHDN
VOL
Inferred from PSRR test 2.7 5.5 V
VCM = VSS to V
B
VCM = VSS to V
IN
DD
DD
Inferred from CMRR test V
DD
V
= 0V (Note 3) 10 Ω
SHDN
V
= 0V, RL = 200Ω (Note 3) 68 120 mV
SHDN
VSS + 0.20V < V
OUT
< VDD - 0.20V
RL = 32Ω
OUT
RL = 200Ω
R
= 2kΩ
L
VDD = 2.7V, VIN = ±100mV 70
OUT
VDD = 5V, VIN = ±100mV 200
IL = 10mA VDD = 2.7V
I
= 30mA VDD = 5V
L
RL = 100kΩ 100
RL = 2kΩ 85 98Large-Signal Voltage Gain A
R
= 200Ω 74 80
L
VDD - V
V
OL
VDD - V
V
OL
VDD - V
V
OL
V
dB
mV
mA
mV
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
_______________________________________________________________________________________ 3
(
)
)
DC ELECTRICAL CHARACTERISTICS (continued)
(VDD= 2.7V, VSS= 0V, VCM= VDD/2, V
OUT
= (VDD/2), RL= ∞ connected to (VDD/2), V
SHDN
= VDD, TA= +25°C, unless otherwise
noted.) (Note 2)
DC ELECTRICAL CHARACTERISTICS
(VDD= 2.7V, VSS= 0V, VCM= VDD/2, V
OUT
= (VDD/2), RL= ∞ connected to (VDD/2), V
SHDN
= VDD, TA= -40 to +125°C, unless other-
wise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Quiescent Supply Current (per
Amplifier)
Shutdown Supply Current (per
Amplifier) (Note 3)
I
SHDN Logic Threshold (Note 3)
SHDN Input Bias Current VSS < V
VDD = 5.5V, VCM = VDD / 2 1.2 2.3
VDD = 2.7V, VCM = VDD / 2 1.1 2.0
V
= 0V, RL = ∞
S HDN
Shutdown mode 0.8
IL
Normal mode VDD x 0.57
IH
< VDD (Note 3) 50 pA
S HDN
DD
I
DD
SHDN
V
V
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Supply Voltage Range V
Input Offset Voltage V
Offset-Voltage Tempco ∆V
Input Bias Current (Note 4) I
DD
OS
OS
B
Inferred from PSRR test 2.7 5.5 V
/∆T ±3 µV/°C
TA = -40°C to +85°C17
TA = -40°C to +125°C 550
VDD = 5.5V 0.5 1
= 2.7V 0.1 1
V
DD
mA
µA
V
±8mV
pA
Common-Mode Input Voltage Range V
CM
Common-Mode Rejection Ratio CMRR VSS < VCM < V
Inferred from CMRR test V
DD
SS
V
DD
46 dB
Power-Supply Rejection Ratio PSRR VDD = 2.7V to 5.5V 70 dB
Output Voltage in Shutdown V
OUT(SHDN
Large-Signal Voltage Gain A
Output Voltage Swing V
Output Voltage
VOL
OUT
V
< 0V, RL = 200Ω (Note 3) 150 mV
SHDN
VSS + 0.2V < VDD - 0.2V
RL = 32Ω, TA = +85°C
RL = 200Ω
RL = 2kΩ
IL = 10mA VDD = 2.7V
I
= 30mA,
L
T
= -40°C
A
V
= 5V
DD
to +85°C
RL = 2kΩ 76
= 200Ω 67
R
L
VDD - V
OH
- V
V
OL
SS
VDD - V
OH
- V
V
OL
SS
VDD - V
OH
- V
V
OL
SS
VDD - V
OH
- V
V
OL
SS
VDD - V
OH
- V
V
OL
SS
650
650
150
150
20
20
250
230
400
370
dB
mV
mV
V
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
4 _______________________________________________________________________________________
Note 2: All units 100% tested at +25°C. All temperature limits are guaranteed by design.
Note 3: SHDN logic parameters are for the MAX4231/MAX4233 only.
Note 4: Guaranteed by design.
)
DC ELECTRICAL CHARACTERISTICS (continued)
(VDD= 2.7V, VSS= 0V, VCM= VDD/2, V
OUT
= (VDD/2), RL= ∞ connected to (VDD/2), V
SHDN
= VDD, TA= -40 to +125°C, unless other-
wise noted.) (Note 2)
AC ELECTRICAL CHARACTERISTICS
(VDD= 2.7V, VSS= 0V, VCM= VDD/2, V
OUT
= (VDD/2), RL= ∞ connected to (VDD/2), V
SHDN
= VDD, TA= +25°C, unless otherwise noted.)
(Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Quiescent Supply Current
(per Amplifier)
Shutdown Supply Current
(per Amplifier) (Note 3)
SHDN Logic Threshold (Note 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Gain-Bandwidth Product GBWP VCM = VDD/2 10 MHz
Full-Power Bandwidth FPBW V
Slew Rate SR 10 V/µs
Phase Margin PM 70 Degrees
Gain Margin GM 15 dB
Total Harmonic Distortion Plus
Noise
Input Capacitance C
Voltage-Noise Density e
Channel-to-Channel Isolation f = 1kHz, RL = 100kΩ 125 dB
Capacitive-Load Stability A
Shutdown Time t
Enable Time from Shutdown t
Power-Up Time t
I
DD
I
DD(SHDN
V
IL
V
IH
THD+N f = 10kHz, V
IN
n
SHDN
ENABLE
ON
VDD = 5.5V, VCM = VDD/2 2.8
VDD = 2.7V, VCM = VDD/2 2.5
V
< 0V, RL = ∞
SHDN
Shutdown mode 0.8
Normal mode VDD x 0.61
= 2V
OUT
f = 1kHz 15
f = 10kHz 12
= 1V/V, no sustained oscillations 780 pF
VCL
(Note 3) 1 µs
(Note 3) 1 µs
, VDD = 5V 0.8 MHz
P-P
= 2V
OUT
P-P
VDD = 5.5V 2.0
= 2.7V 2.0
V
DD
, A
= 1V/V 0.0005 %
VCL
8pF
5µs
mA
µA
V
nV/√Hz
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
_______________________________________________________________________________________ 5
__________________________________________Typical Operating Characteristics
(VDD= 2.7V, VSS= 0V, VCM= VDD/2, V
OUT
= VDD/2, RL= ∞, connected to VDD/2, V
SHDN
= VDD, TA = +25°C, unless otherwise noted.)
GAIN AND PHASE vs. FREQUENCY
70
60
50
40
30
20
GAIN (dB)
10
0
-10
-20
-30
= 1000V/V
A
V
0.01k 10k 100k 1M 10M0.1k 1k 100M
FREQUENCY (Hz)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
0
-10
-20
-30
-40
-50
-60
PSRR (dB)
-70
-80
-90
-100
0.01k 10k 100k 1M0.1k 1k 10M
FREQUENCY (Hz)
SUPPLY CURRENT vs. TEMPERATURE
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
SUPPLY CURRENT (mA)
0.4
0.2
0
-40 0 20 40-20 60 80 100 120
TEMPERATURE (°C)
A
V
MAX4230 toc01
= 1V/V
120
90
60
30
0
-30
-60
-90
-120
-150
-180
MAX4230 toc03
MAX4230 toc05
PHASE (DEGREES)
GAIN AND PHASE vs. FREQUENCY
= 250pF)
(C
70
60
50
40
30
20
GAIN (dB)
10
0
-10
= 1000V/V
A
V
= 250pF
C
L
-20
-30
0.01k 10k 100k 1M 10M0.1k 1k 100M
L
FREQUENCY (Hz)
MAX4230 toc02
OUTPUT IMPEDANCE vs. FREQUENCY
1000
100
10
1
OUTPUT IMPEDANCE (Ω)
0.1
= 1V/V
A
V
0.01
1k 100k 1M10k 10M
FREQUENCY (Hz)
SUPPLY CURRENT vs. TEMPERATURE
(SHDN = LOW)
110
100
90
80
70
SUPPLY CURRENT (nA)
60
50
-40 0-20 20 40 60 80 100 120
TEMPERATURE (°C)
SHDN = V
120
90
60
30
0
-30
-60
PHASE (DEGREES)
-90
-120
-150
-180
MAX4230 toc04
MAX4230 toc06
SS
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
6 _______________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)
(VDD= 2.7V, VSS= 0V, VCM= VDD/2, V
OUT
= VDD/2, RL= ∞, connected to VDD/2, V
SHDN
= VDD, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT PER AMPLIFIER
vs. SUPPLY VOLTAGE
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
SUPPLY CURRENT (mA)
0.4
0.2
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
MAX4230 toc07
(mV)
OS
V
OUTPUT SWING LOW
vs. TEMPERATURE
140
120
100
(mV)
SS
- V
OUT
V
80
60
40
20
0
V
= 5.0V
DD
Ω
= 200
R
L
V
= 2.7V
DD
Ω
= 200
R
L
-40 0 20-20 40 60 80 100 120
TEMPERATURE (°C)
MAX4230/3 toc10
-0.5
-1.0
INPUT OFFSET VOLTAGE (mV)
-1.5
-2.0
SUPPLY CURRENT PER AMPLIFIER
vs. COMMON-MODE VOLTAGE
MAX4230/34 toc13
0.45
0.40
0.35
0.30
0.25
0.20
THD+N (%)
0.15
0.10
0.05
1.4
1.2
1.0
0.8
0.6
SUPPLY CURRENT (mA)
0.4
0.2
02.01.50.5 1.0 2.5 3.0 3.5 4.0 4.5 5.0
COMMON-MODE VOLTAGE (V)
VDD = 5.0V
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
2
VDD = 2.7V
1
0
-1
-2
-40 0-20 20 40 60 80 100 120
TEMPERATURE (°C)
VDD = 5.0V
INPUT OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
1.0
0.5
0
0 0.5 1.0
COMMON-MODE VOLTAGE (V)
1.5
2.0 2.5
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
V
= 2V
OUT
P-P
500kHz LOWPASS FILTER
RL = 32Ω
0
10 100 1k 10k 100k
FREQUENCY (Hz)
RL = 10kΩ
100
MAX4230 toc08
80
(mV)
60
OUT
- V
DD
V
40
20
0
1.2
1.0
MAX4230/3 toc11
0.8
0.6
SUPPLY CURRENT (mA)
0.4
0.2
TOTAL HARMONIC DISTORTION PLUS NOISE
10
MAX4230/34 toc14
1
0.1
THD+N (%)
0.001
0.0001
OUTPUT SWING HIGH
vs. TEMPERATURE
V
= 5.0V
DD
Ω
= 200
R
L
V
= 2.7V
DD
Ω
= 200
R
L
120
-40 0-20
20
40 60 80
TEMPERATURE (°C)
100
SUPPLY CURRENT PER AMPLIFIER
vs. COMMON-MODE VOLTAGE
V
= 2.7V
DD
0 0.5 1.0
COMMON-MODE VOLTAGE (V)
1.5
2.0 2.5
vs. PEAK-TO-PEAK OUTPUT VOLTAGE
f = 10kHz
= 5V
V
DD
RL = 25
4.0 4.2 4.6 5.0
PEAK-TO-PEAK OUTPUT VOLTAGE (V)
RL = 250
Ω
4.4
RL = 2k
Ω
RL = 100k
Ω
Ω
4.8
MAX4230/34 toc09
MAX4230/3 toc12
MAX4230/34 toc15
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
_______________________________________________________________________________________ 7
____________________________Typical Operating Characteristics (continued)
(VDD= 2.7V, VSS= 0V, VCM= VDD/2, V
OUT
= VDD/2, RL= ∞, connected to VDD/2, V
SHDN
= VDD, TA = +25°C, unless otherwise noted.)
SMALL-SIGNAL TRANSIENT
RESPONSE (NONINVERTING)
IN
50mV/div
OUT
400ns/div
MAX4230/34 toc16
LARGE-SIGNAL TRANSIENT
RESPONSE (INVERTING)
IN
1V/div
OUT
400ns/div
MAX4230/34 toc19
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SOURCING, V
250
= 5.0V)
DD
V
DIFF
= 100mV
SMALL-SIGNAL TRANSIENT
RESPONSE (INVERTING)
IN
50mV/div
OUT
400ns/div
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SOURCING, V
80
70
60
50
40
30
OUTPUT CURRENT (mA)
20
10
0
1.0 1.4 1.6 1.8 2.01.2 2.2 2.4 2.6 2.8 3.0
OUTPUT VOLTAGE (V)
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SINKING, V
0
DD
= 2.7V)
DD
= 5.0V)
V
DIFF
V
DIFF
MAX4230/34 toc17
= 100mV
= 100mV
LARGE-SIGNAL TRANSIENT
RESPONSE (NONINVERTING)
IN
1V/div
OUT
400ns/div
MAX4230/34 toc18
OUTPUT CURRENT vs. OUTPUT VOLTAGE
0
-10
MAX4230/34 toc20
-20
-30
-40
-50
OUTPUT CURRENT (mA)
-60
-70
-80
(SINKING, V
0 0.4 0.60.2 0.8 1.0 1.2 1.4 1.6
OUTPUT VOLTAGE (V)
= 2.7V)
DD
V
DIFF
= 100mV
INPUT VOLTAGE NOISE
vs. FREQUENCY
200
100
MAX4230/34 toc21
200
150
100
OUTPUT CURRENT (mA)
50
0
2.0 3.02.5 3.5 4.0 4.5 5.0
OUTPUT VOLTAGE (V)
MAX4230/34 toc22
-100
-150
OUTPUT CURRENT (mA)
-200
-250
-50
01.00.5 1.5 2.0 2.5 3.0
OUTPUT VOLTAGE (V)
MAX4230/34 toc23
INPUT VOLTAGE NOISE (nV/√Hz)
10
100 10k 100k
1k
FREQUENCY (Hz)
MAX4230/34 toc24
MAX4230–MAX4234
Detailed Description
Rail-to-Rail Input Stage
The MAX4230–MAX4234 CMOS operational amplifiers
have parallel-connected n- and p-channel differential
input stages that combine to accept a common-mode
range extending to both supply rails. The n-channel
stage is active for common-mode input voltages typically greater than (VSS+ 1.2V), and the p-channel
stage is active for common-mode input voltages typically less than (VDD- 1.2V).
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 40mA, the maximum package
power dissipation is not 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 equation below gives an approximation of the package power dissipation:
where:
V
RMS
= RMS voltage from VDDto V
OUT
when sourcing
current and RMS voltage from V
OUT
to V
SS
when sink-
ing current.
I
RMS
= RMS current flowing out of or into the op amp
and the load.
θ = phase difference between the voltage and the current. For resistive loads, COS θ = 1.
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
8 _______________________________________________________________________________________
Pin Description
PIN
M AX42 30
SOT 23 /
SC7 0
— 5 B3 — 5, 6 C4, A4 —
— — — 3 3 C3 3 IN1+ Noninverting Input to Amplifier 1
— — — 2 2 C2 2 IN1- Inverting Input to Amplifier 1
— — — 1 1 C1 1 OUT1 Amplifier 1 Output
— — — 5 7 A3 5 IN2+ Noninverting Input to Amplifier 2
— — — 6 8 A2 6 IN2- Inverting Input to Amplifier 2
— — — 7 9 A1 7 OUT2 Amplifier 2 Output
— — — — — — 10, 12
— — — — — — 9, 13 IN 3- , IN 4- Inverting Input to Amplifiers 3 and 4
— — — — — — 8, 14
M AX42 31
SOT 23 /
SC7 0/Th in
µ DF N
1 1 B1 — — — — IN+ Noninverting Input
2 2 A1 4 4 B4 11 V
3 3 B2 — — — — IN- Inverting Input
4 4 A2 — — — — OUT Amplifier Output
5 6 A3 8 10 B1 4 V
M A X42 31
U CSP
M AX42 32
SOT 23 /
µ M A X
M A X4 2 3 3
µ M A X
M AX42 33
U CSP
M AX42 34
T SSOP/
SO
NAME FUNCTION
Negative Supply Input. Connect to
SS
ground for single-supply operation.
Positive Supply Input
DD
SHDN,
SHDN1,
SHDN2
IN3+,
OUT3,
OUT4
Shutdown Control. Tie to high for normal
operation.
Noninverting Input to Amplifiers 3 and 4
Amplifiers 3 and 4 Outputs
P V I COS
IC DISS RMS RMS
()
≅θ
For example, the circuit in Figure 1 has a package
power dissipation of 196mW:
where:
VDC= the DC component of the output voltage.
IDC= the DC component of the output current.
V
PEAK
= the highest positive excursion of the AC com-
ponent of the output voltage.
I
PEAK
= the highest positive excursion of the AC com-
ponent of the output current.
Therefore:
P
IC(DISS)
= V
RMSIRMS
COS θ
= 196mW
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
= 15.6mW
If the configuration in Figure 1 were used with all four of
the MAX4234 amplifiers, the absolute maximum powerdissipation rating of this package would be exceeded
(see the
Absolute Maximum Ratings
section).
60mW Single-Supply Stereo
Headphone Driver
Two MAX4230/MAX4231s can be used as a single-supply, stereo headphone driver. The circuit shown in
Figure 2 can deliver 60mW per channel with 1% distortion from a single 5V supply.
The input capacitor (CIN), in conjunction with RIN, forms
a highpass filter that removes the DC bias from the
incoming signal. The -3dB point of the highpass filter is
given by:
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
_______________________________________________________________________________________ 9
Figure 2. Circuit Example: Adding a Coupling Capacitor
Greatly Reduces Power Dissipation of its Package
Figure 1. MAX4230/MAX4231 Used in Single-Supply Operation
Circuit Example
3.6V
R
V
= 2V
IN
C
P-P
MAX4230
R
MAX4231
32Ω
V
V V
≅−
RMS DD DC
. .
I +
RMS
.
()
=−+=
VV
36 18
I
DC
mA
PEAK
2
RMS
≅=+
I
=
78 4
PEAK
+
2
.
V
10
.
2 507
2
VV
183210 32
.
Ω
V
RMS
./
2
Ω
R
F
C
IN
R
LEFT
AUDIO INPUT
C
IN
RIGHT
AUDIO INPUT
V
RMS
IN
V
BIAS
R
IN
V
PEAK
≅
2
.
V
10
==
.
0 707
2
I
I +
≅=+
RMS
.
IA
=
22 1
DC
mA
PEAK
2
RMS
MAX4230
R
F
V
RMS
0
C
OUT
C
OUT
./
10 32
HEADPHONE JACK
TO 32Ω STEREO
HEADSET
V
Ω
2
f
dB
−=3
2π
1
RC
IN IN
MAX4230–MAX4234
Choose gain-setting resistors RINand RFaccording to
the amount of desired gain, keeping in mind the maximum output amplitude. The output coupling capacitor,
C
OUT
, blocks the DC component of the amplifier output, preventing DC current flowing to the load. The output capacitor and the load impedance form a highpass
filer with the -3dB point determined by:
For a 32Ω load, a 100µF aluminum electrolytic capacitor gives a low-frequency pole at 50Hz.
Bridge Amplifier
The circuit shown in Figure 3 uses a dual MAX4230 to
implement a 3V, 200mW amplifier suitable for use in
size-constrained applications. This configuration eliminates the need for the large coupling capacitor
required by the single op-amp speaker driver when single-supply operation is necessary. Voltage gain is set
to 10V/V; however, it can be changed by adjusting the
82kΩ resistor value.
Rail-to-Rail Input Stage
The MAX4230–MAX4234 CMOS op amps have parallelconnected n- and p-channel differential input stages
that combine to accept a common-mode range extending to both supply rails. The n-channel stage is active
for common-mode input voltages typically greater than
(VSS+ 1.2V), and the p-channel stage is active for
common-mode input voltages typically less than (VDD-
1.2V).
Rail-to-Rail Output Stage
The minimum output is within millivolts of ground for single-supply operation, where the load is referenced to
ground (VSS). Figure 4 shows the input voltage range
and the output voltage swing of a MAX4230 connected
as a voltage follower. The maximum output voltage
swing is load dependent; however, it is guaranteed to
be within 500mV of the positive rail (VDD= 2.7V) even
with maximum load (32Ω to ground).
Observe the
Absolute Maximum Ratings
for power dissipation and output short-circuit duration (10s, max)
because the output current can exceed 200mA (see
the
Typical Operating Characteristics
.)
Input Capacitance
One consequence of the parallel-connected differential
input stages for rail-to-rail operation is a relatively large
input capacitance CIN(5pF typ). This introduces a pole
at frequency (2πR′CIN)-1, where R′ is the parallel combination of the gain-setting resistors for the inverting or
noninverting amplifier configuration (Figure 5). If the pole
frequency is less than or comparable to the unity-gain
bandwidth (10MHz), the phase margin is reduced, and
the amplifier exhibits degraded AC performance through
either ringing in the step response or sustained oscillations. The pole frequency is 10MHz when R′ = 2kΩ. To
maximize stability, R′ << 2kΩ is recommended.
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
10 ______________________________________________________________________________________
Figure 4. Rail-to-Rail Input/Output RangeFigure 3. Dual MAX4230/MAX4231 Bridge Amplifier for 200mW
at 3V
C1
0.5V
P-P
0.1µF
R1
0.1µF
16kΩ
3V
R5
51kΩ
C2
R6
51kΩ
R2
82kΩ
3V
2
3
1/2
MAX4232
8
1
7
1/2
MAX4232
32Ω
fs = 100Hz
4
R3
10kΩ
R4
10kΩ
6
5
1V/div
OUT
1V/div
IN
VCC = 3.0V
= 100kΩ
R
L
5µs/div
f
dB
−=3
2π
1
RC
L OUT
To improve step response when R′ > 2kΩ, connect
small capacitor Cfbetween the inverting input and output. Choose Cfas follows:
Cf= 8(R / Rf) [pf]
where Rfis the feedback resistor and R is the gain-setting resistor (Figure 5).
Driving Capacitive Loads
The MAX4230–MAX4234 have a high tolerance for
capacitive loads. They are stable with capacitive loads
up to 780pF. Figure 6 is a graph of the stable operating
region for various capacitive loads vs. resistive loads.
Figures 7 and 8 show the transient response with
excessive capacitive loads (1500pF), with and without
the addition of an isolation resistor in series with the
output. Figure 9 shows a typical noninverting capacitive-load-driving circuit in the unity-gain configuration.
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
______________________________________________________________________________________ 11
Figure 5. Inverting and Noninverting Amplifiers with Feedback
Compensation
Figure 6. Capacitive-Load Stability
Figure 8. Small-Signal Transient Response with Excessive
Capacitive Load with Isolation Resistor
Figure 7. Small-Signal Transient Response with Excessive
Capacitive Load
INVERTING
R
V
IN
NONINVERTING
R
C
f
R
f
V
OUT
MAX4230
R′ = R || R
f
RfCf = RC
IN
V
IN
V
OUT
MAX4230
R
f
C
f
R′ = R || R
f
RfCf = RC
IN
2500
2000
1500
1000
CAPACITIVE LOAD (pF)
500
VDD = 5.0V
TO VDD/2
R
L
0
1 10010 1k 10k 100k
RESISTIVE LOAD (Ω)
20mV/div
UNSTABLE
STABLE
20mV/div
VDD = 3.0V, CL = 1500pF
R
= 100kΩ, R
L
ISO
= 0Ω
1µs/div
20mV/div
20mV/div
VDD = 3.0V, CL = 1500pF
= 100kΩ, R
R
L
ISO
= 39Ω
1µs/div
MAX4230–MAX4234
The resistor improves the circuit’s phase margin by isolating the load capacitor from the op amp’s output.
Power-Up and Shutdown Modes
The MAX4231/MAX4233 have a shutdown option. When
the shutdown pin (SHDN) is pulled low, supply current
drops to 0.5µA per amplifier (VDD= 2.7V), the amplifiers are disabled, and their outputs are driven to VSS.
Since the outputs are actively driven to VSSin shutdown, any pullup resistor on the output causes a current drain from the supply. Pulling SHDN high enables
the amplifier. In the dual MAX4233, the two amplifiers
shut down independently. Figure 10 shows the
MAX4231’s output voltage to a shutdown pulse. The
MAX4231–MAX4234 typically settle within 5µs after
power-up. Figures 11 and 12 show IDDto a shutdown
plus and voltage power-up cycle.
When exiting shutdown, there is a 6µs delay before the
amplifier’s output becomes active (Figure 10).
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
12 ______________________________________________________________________________________
Figure 9. Capacitive-Load-Driving Circuit
Figure 11. Shutdown Enable/Disable Supply Current
Figure 12. Power-Up/Down Supply Current
Figure 10. Shutdown Output Voltage Enable/Disable
Selector Guide
AMPS PER
PACKAGE
SHUTDOWN
MODE
MAX4230 Single —
MAX4231 Single Yes
PART
MAX4232 Dual —
MAX4233 Dual Yes
MAX4234 Quad —
SHDN
2V/div
I
R
ISO
C
L
1mA/div
OUT
2V/div
DD
100µs/div
1V/div
1V/div
4µs/div
V
DD
2V/div
I
DD
1mA/div
40µs/div
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
______________________________________________________________________________________ 13
Pin Configurations
Power Supplies and Layout
The MAX4230–MAX4234 can operate from a single
2.7V to 5.5V supply, or from dual ±1.35V to ±2.5V supplies. For single-supply operation, bypass the power
supply with a 0.1µF ceramic capacitor. For dual-supply
operation, bypass each supply to ground. 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’ pins, minimizing trace
and lead lengths.
Ordering Information (continued)
Chip Information
MAX4230 TRANSISTOR COUNT: 230
MAX4231 TRANSISTOR COUNT: 230
MAX4232 TRANSISTOR COUNT: 462
MAX4233 TRANSISTOR COUNT: 462
MAX4234 TRANSISTOR COUNT: 924
+
Denotes a lead-free(Pb)/RoHS-compliant package.
T = Tape and reel.
*
EP = Exposed pad.
TOP VIEW
IN+
V
IN-
OUT1
IN1-
IN1+
SS
1
2
SS
3
+
1
2
3
4
5
+
MAX4230
SOT23/SC70
MAX4233
µMAX
IN1-
IN1+
V
IN1-
IN1+
IN2+
IN2-
SS
V
DD
+
1
2
MAX4232
3
4
SOT23/µMAX
1
2
3
4
MAX4234
5
6
7
TSSOP/SO
87V
6
5
DD
OUT2
IN2-
IN2+
14
OUT4
13
IN4-
12
IN4+
11
V
SS
10
IN3+
9
IN3-
8
OUT3
V
5
V
DD
OUT
4
16V
IN+
V
SS
MAX4231
2
34
DD
5
SHDN
OUTIN-
SC70/SOT23
12 3
10
V
DD
A
9
OUT2
IN2-
8
7
IN2+V
6
SHDN2SHDN1
V
B
IN+
OUT
SS
V
MAX4231
IN-
SHDN
A
DD
B
C
UCSP
DD
MAX4231
123
+
IN+ IN-
Thin µDFN
12 3
OUT2
V
OUT1
IN2-
DD
MAX4233
IN1-
UCSP
OUTSHDN
456
V
SS
OUT1
4
IN2+
SHDN2
IN1+
SHDN1
OUT1
V
SS
OUT2
PART TEMP RANGE
PIN-
PACKAGE
MAX4232AKA+T -40°C to +125°C 8 SOT23 AAKW
MAX4232AUA+T -40°C to +125°C 8 µMAX —
MAX4233AUB+T -40°C to +125°C 10 µMAX —
MAX4233ABC+T -40°C to +125°C 10 UCSP ABF
MAX4234AUD -40°C to +125°C 14 TSSOP —
MAX4234AUD/V+ -40°C to +125°C 14 TSSOP +YWD
MAX4234ASD -40°C to +125°C 14 SO —
TOP
M ARK
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
14 ______________________________________________________________________________________
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
PACKAGE TYPE PACKAGE CODE OUTLINE NO.
LAND
PATTERN NO.
5 SC70 X5+1
21-0076 90-0188
6 SC70
X6SN+1
21-0077 90-0189
5 SOT23 U5+1
21-0057 90-0174
6 SOT23 U6SN+1
21-0058 90-0175
8 µMAX U8+1
21-0036 90-0092
8 SOT23 K8+5
21-0078 90-0176
10 µMAX U10+2
21-0061 90-0330
10 UCSP B12+4
21-0104 —
6 UCSP R61A1+1
21-0228 —
6 Thin µDFN Y61A1+1
21-0190 90-0233
14 TSSOP U14+1
21-0066 90-0113
14 SO S14+1
21-0041 90-0112
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
______________________________________________________________________________________ 15
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
16 ______________________________________________________________________________________
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
______________________________________________________________________________________ 17
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
18 ______________________________________________________________________________________
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
______________________________________________________________________________________ 19
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
α
α
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
20 ______________________________________________________________________________________
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
______________________________________________________________________________________ 21
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
α
α
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
22 ______________________________________________________________________________________
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
______________________________________________________________________________________ 23
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
UCSP.EPS
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
24 ______________________________________________________________________________________
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
______________________________________________________________________________________ 25
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
26 ______________________________________________________________________________________
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
______________________________________________________________________________________ 27
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
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. The parametric values (min and max limits) shown in
the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
28
____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2012 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
Revision History
REVISION
NUMBER
7 7/08 Added 6-pin µDFN package for the MAX4231 1, 2, 8, 13
8 10/08
9 10/08 Added shutdown pin limits 3, 4
10 12/08 Added automotive part number 13
11 9/09
12 1/10 Updated Absolute Maximum Ratings section 2
13 1/11 Added 10 µMAX to Package Information section 14
14 10/11
15 3/12 Updated thermal data in the Absolute Maximum Ratings.2
REVISION
DATE
Corrected top mark for MAX4321, 6 SOT23 package; changed MAX4320 and
4321 to lead-free packages
Corrected top mark designation and pin configuration, and added UCSP
package
Updated Electrical Characteristics table with specs for bias current at various
temperatures
DESCRIPTION
PAGES
CHANGED
1
1, 2, 8, 13
1–4
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