MAXIM MAX4232AKA+T

19-2164; Rev 8; 10/08
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
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 the
6-pin SC70 package and a 1.5mm x 1.0mm x 0.5mm
ultra-thin µDFN package. 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).
Features
♦ 30mA Output Drive Capability
♦ Rail-to-Rail Input and Output
♦ 1.1mA Supply Current per Amplifier
♦ 2.7V to 5.5V Single-Supply Operation
♦ 10MHz Gain-Bandwidth Product
♦ High Slew Rate: 10V/µs
♦ 100dB Voltage Gain (RL = 100kΩ)
♦ 85dB Power-Supply Rejection Ratio
♦ No Phase Reversal for Overdriven Inputs
♦ Unity-Gain Stable for Capacitive Loads to 780pF
♦ Low-Power Shutdown Mode Reduces Supply
Current to < 1µA
♦ Available in 5-Pin SC70 Package (MAX4230)
and 6-Pin, Thin µDFN Package (MAX4231)
♦ Available in 10-Bump UCSP Package (MAX4233)
Ordering Information
PART
TEMP RANGE
-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
MAX4231AYT+TG65
-40°C to +125°C 6 Thin µDFN
MAX4230AXK+T
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
TOP
MARK
PINPACKAGE
+AI
Ordering Information continued at end of data sheet.
+Denotes a lead-free/RoHS-compliant package.
T = Tape and reel.
Sound Ports/Cards
Typical Operating Circuit
Set-Top Boxes
Digital-to-Analog Converter Buffers
ANTENNA
Transformer/Line Drivers
2.7V TO 5.5V
Motor Drivers
PA
IOUT = 30mA
DAC
RISO
MAX4231
Selector Guide appears at end of data sheet.
Pin Configurations appear at end of data sheet.
SHDN
CLOAD
C
UCSP is a trademark of Maxim Integrated Products, Inc.
R
RF
________________________________________________________________ Maxim Integrated Products
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.
1
MAX4230–MAX4234
General Description
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VDD to VSS) ....................................................6V
All Other Pins ....................................(VSS - 0.3V) + (VDD + 0.3V)
Output Short-Circuit Duration to VDD or VSS (Note 1) ................10s
Continuous Power Dissipation (TA = +70°C)
5-Pin SC70 (derate 3.1mW/°C above +70°C) ..............247mW
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW
6-Pin SC70 (derate 3.1mW/°C above +70°C) ..............245mW
6-Pin SOT23 (derate 8.7mW/°C above +70°C)............696mW
6-Pin Thin µDFN (derate 2.1mW/°C above +70°C)...170.2mW
8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW
8-Pin µMAX® (derate 4.5mW/°C above +70°C) ..........362mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ..........444mW
10-Bump UCSP (derate 6.1mW/°C above +70°C) .....484mW
10-Pin TDFN (derate 24.4mW°C above +70°C) ........1951mW
14-Pin SO (derate 8.3mW/°C above +70°C) ...............667mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: Package power dissipation should also be observed.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
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
(VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = (VDD/2), RL = ∞ connected to (VDD/2), V SHDN = VDD, TA = +25°C, unless otherwise
noted.) (Note 2)
PARAMETER
SYMBOL
Operating Supply Voltage Range
VDD
Input Offset Voltage
VOS
Input Bias Current
CONDITIONS
Inferred from PSRR test
TYP
2.7
0.85
MAX
UNITS
5.5
V
±6
mV
IB
VCM = VSS to VDD
50
Input Offset Current
IOS
VCM = VSS to VDD
50
pA
Input Resistance
RIN
1000
MΩ
Common-Mode Input Voltage
Range
VCM
Inferred from CMRR test
VSS
VSS < VCM < VDD
52
73
CMRR
Power-Supply Rejection Ratio
PSRR
VDD = 2.7V to 5.5V
Shutdown Output Impedance
ROUT
V SHDN = 0V (Note 3)
10
VOUT(SHDN) V SHDN = 0V, RL = 200Ω (Note 3)
RL = 100kΩ
VSS + 0.20V < VOUT
AVOL
RL = 2kΩ
< VDD - 0.20V
RL = 200Ω
68
Large-Signal Voltage Gain
RL = 32Ω
Output Voltage Swing
VOUT
RL = 200Ω
RL = 2kΩ
Output Source/Sink Current
IOUT
dB
85
dB
98
74
80
dB
400
500
VOL - VSS
360
500
VDD - VOH
80
120
VOL - VSS
70
120
VDD - VOH
8
14
7
14
VDD = 5V, VIN = ±100mV
200
VDD = 2.7V
Output Voltage
VDD = 5V
mV
100
85
70
IL = 30mA
Ω
120
VDD - VOH
VOL - VSS
V
70
VDD = 2.7V, VIN = ±100mV
IL = 10mA
pA
VDD
Common-Mode Rejection Ratio
Output Voltage in Shutdown
2
MIN
mV
mA
VDD - VOH
128
200
VOL - VSS
112
175
VDD - VOH
240
320
VOL - VSS
224
300
_______________________________________________________________________________________
mV
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
(VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = (VDD/2), RL = ∞ connected to (VDD/2), V SHDN = VDD, TA = +25°C, unless otherwise
noted.) (Note 2)
PARAMETER
SYMBOL
Quiescent Supply Current (per
Amplifier)
IDD
Shutdown Supply Current (per
Amplifier) (Note 3)
IDD(SHDN)
SHDN Logic Threshold (Note 3)
SHDN Input Bias Current
CONDITIONS
TYP
MAX
VDD = 5.5V, VCM = VDD / 2
1.2
2.3
VDD = 2.7V, VCM = VDD / 2
1.1
2.0
VDD = 5.5V
0.5
1
VDD = 2.7V
0.1
1
V SHDN = 0V, RL = ∞
MIN
Shutdown mode
VSS + 0.3
Normal mode
VDD - 0.3
VSS < V S HDN < VDD (Note 3)
UNITS
mA
µA
V
50
pA
DC ELECTRICAL CHARACTERISTICS
(VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = (VDD/2), RL = ∞ connected to (VDD/2), V SHDN = VDD, TA = -40 to +125°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
Operating Supply Voltage Range
VDD
Input Offset Voltage
VOS
Offset-Voltage Tempco
Common-Mode Input Voltage Range
CONDITIONS
MIN
Inferred from PSRR test
ΔVOS /ΔT
VCM
TYP
2.7
MAX
V
±8
mV
±3
Inferred from CMRR test
VSS
UNITS
5.5
µV/°C
VDD
V
Common-Mode Rejection Ratio
CMRR
VSS < VCM < VDD
46
dB
Power-Supply Rejection Ratio
PSRR
VDD = 2.7V to 5.5V
70
dB
Output Voltage in Shutdown
Large-Signal Voltage Gain
VOUT(SHDN)
AVOL
V SHDN < 0V, RL = 200Ω (Note 3)
VSS + 0.2V < VDD - 0.2V
RL = 32Ω, TA = +85°C
Output Voltage Swing
VOUT
RL = 200Ω
RL = 2kΩ
Output Voltage
IL = 10mA
VDD = 2.7V
IL = 30mA,
TA = -40°C
to +85°C
VDD = 5V
150
RL = 2kΩ
76
RL = 200Ω
67
mV
dB
VDD - VOH
650
VOL - VSS
650
VDD - VOH
150
VOL - VSS
150
VDD - VOH
20
VOL - VSS
20
VDD - VOH
250
VOL - VSS
230
VDD - VOH
400
VOL - VSS
370
mV
mV
_______________________________________________________________________________________
3
MAX4230–MAX4234
DC ELECTRICAL CHARACTERISTICS (continued)
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
DC ELECTRICAL CHARACTERISTICS (continued)
(VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = (VDD/2), RL = ∞ connected to (VDD/2), V SHDN = VDD, TA = -40 to +125°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
Quiescent Supply Current
(per Amplifier)
IDD
Shutdown Supply Current
(per Amplifier) (Note 3)
IDD(SHDN)
CONDITIONS
MIN
TYP
MAX
VDD = 5.5V, VCM = VDD/2
2.8
VDD = 2.7V, VCM = VDD/2
2.5
V SHDN < 0V, RL = ∞
VDD = 5.5V
2.0
VDD = 2.7V
2.0
UNITS
mA
µA
AC ELECTRICAL CHARACTERISTICS
(VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = (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
Gain-Bandwidth Product
GBWP
VCM = VDD/2
10
MHz
Full-Power Bandwidth
FPBW
VOUT = 2VP-P, VDD = 5V
0.8
MHz
SR
10
V/µs
Phase Margin
PM
70
Degrees
Gain Margin
GM
15
dB
0.0005
%
8
pF
Slew Rate
Total Harmonic Distortion Plus
Noise
THD+N
Input Capacitance
CIN
Voltage-Noise Density
en
f = 10kHz, VOUT = 2VP-P, AVCL = 1V/V
f = 1kHz
15
f = 10kHz
12
Channel-to-Channel Isolation
f = 1kHz, RL = 100kΩ
125
dB
Capacitive-Load Stability
AVCL = 1V/V, no sustained oscillations
780
pF
Shutdown Time
Enable Time from Shutdown
Power-Up Time
tSHDN
(Note 3)
1
µs
tENABLE
(Note 3)
1
µs
5
µs
tON
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.
4
nV/√Hz
_______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
GAIN AND PHASE vs. FREQUENCY
(CL = 250pF)
MAX4230 toc01
MAX4230 toc02
70
60
90
60
90
50
60
50
60
40
30
40
30
30
0
20
-30
10
-60
0
-90
-10
AV = 1000V/V
-20
-30
0.01k 0.1k
1k
10k
100k
1M
GAIN (dB)
120
PHASE (DEGREES)
GAIN (dB)
70
30
0
20
-30
10
-60
0
-90
-120
-10
-120
-150
-20
-180
10M 100M
AV = 1000V/V
CL = 250pF
-30
0.01k 0.1k
10k
100k
1M
-180
10M 100M
FREQUENCY (Hz)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
OUTPUT IMPEDANCE vs. FREQUENCY
-10
OUTPUT IMPEDANCE (Ω)
-20
-30
-40
-50
-60
-70
-80
MAX4230 toc04
1000
MAX4230 toc03
0
100
10
1
0.1
AV = 1V/V
-90
-100
0.01k
AV = 1V/V
0.01
0.1k
1k
10k
100k
1M
10M
1k
10k
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
SUPPLY CURRENT vs. TEMPERATURE
SUPPLY CURRENT vs. TEMPERATURE
(SHDN = LOW)
110
MAX4230 toc05
2.0
1.8
100
SUPPLY CURRENT (nA)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
MAX4230 toc06
PSRR (dB)
-150
1k
FREQUENCY (Hz)
SUPPLY CURRENT (mA)
120
PHASE (DEGREES)
GAIN AND PHASE vs. FREQUENCY
90
80
70
60
SHDN = VSS
0.2
0
50
-40 -20
0
20
40
60
80
TEMPERATURE (°C)
100 120
-40 -20
0
20
40
60
80
100 120
TEMPERATURE (°C)
_______________________________________________________________________________________
5
MAX4230–MAX4234
__________________________________________Typical Operating Characteristics
(VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = VDD/2, RL = ∞, connected to VDD/2, V SHDN = VDD, TA = +25°C, unless otherwise noted.)
____________________________Typical Operating Characteristics (continued)
(VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = VDD/2, RL = ∞, connected to VDD/2, V SHDN = VDD, TA = +25°C, unless otherwise noted.)
1.8
1.6
MAX4230 toc08
2
MAX4230 toc07
2.0
VDD = 2.7V
1.0
80
VDD - VOUT (mV)
1.2
VDD = 5.0V
0
0.8
0.6
VDD = 5.0V
RL = 200Ω
100
1
1.4
VOS (mV)
SUPPLY CURRENT (mA)
OUTPUT SWING HIGH
vs. TEMPERATURE
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
MAX4230/34 toc09
SUPPLY CURRENT PER AMPLIFIER
vs. SUPPLY VOLTAGE
VDD = 2.7V
RL = 200Ω
60
40
-1
0.4
20
0.2
0
-2
3.0
3.5
4.0
4.5
5.0
5.5
20
40
60
80
100 120
-40 -20
20
40
60
100 120
80
OUTPUT SWING LOW
vs. TEMPERATURE
INPUT OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
SUPPLY CURRENT PER AMPLIFIER
vs. COMMON-MODE VOLTAGE
80
60
VDD = 2.7V
RL = 200Ω
40
1.2
0.5
0
-0.5
-1.0
1.0
-2.0
0
0
20
40
60
80
0.6
VDD = 2.7V
0.2
0
100 120
0.8
0.4
-1.5
20
MAX4230/3 toc12
1.0
SUPPLY CURRENT (mA)
MAX4230/3 toc10
VDD = 5.0V
RL = 200Ω
-40 -20
0
TEMPERATURE (°C)
0.5
1.5
1.0
2.0
2.5
0
0.5
1.0
1.5
2.0
2.5
COMMON-MODE VOLTAGE (V)
COMMON-MODE VOLTAGE (V)
SUPPLY CURRENT PER AMPLIFIER
vs. COMMON-MODE VOLTAGE
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. PEAK-TO-PEAK OUTPUT VOLTAGE
1.2
VOUT = 2VP-P
500kHz LOWPASS FILTER
0.40
10
MAX4230/34 toc14
0.45
MAX4230/34 toc13
1.4
0.35
f = 10kHz
VDD = 5V
1
RL = 25Ω
0.30
THD+N (%)
1.0
0.8
0.25
0.20
RL = 2kΩ
RL = 100kΩ
MAX4230/34 toc15
TEMPERATURE (°C)
THD+N (%)
VOUT - VSS (mV)
0
TEMPERATURE (°C)
100
RL = 250Ω
0.1
0.15
0.6
VDD = 5.0V
0.4
RL = 32Ω
0.10
0.001
0.05
RL = 10kΩ
0
0.2
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
COMMON-MODE VOLTAGE (V)
6
-20
SUPPLY VOLTAGE (V)
140
120
0
-40
MAX4230/3 toc11
2.5
INPUT OFFSET VOLTAGE (mV)
2.0
SUPPLY CURRENT (mA)
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
10
100
1k
FREQUENCY (Hz)
10k
100k
0.0001
4.0
4.2
4.4
4.6
4.8
PEAK-TO-PEAK OUTPUT VOLTAGE (V)
_______________________________________________________________________________________
5.0
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
SMALL-SIGNAL TRANSIENT
RESPONSE (NONINVERTING)
SMALL-SIGNAL TRANSIENT
RESPONSE (INVERTING)
LARGE-SIGNAL TRANSIENT
RESPONSE (NONINVERTING)
MAX4230/34 toc17
MAX4230/34 toc16
MAX4230/34 toc18
IN
IN
IN
50mV/div
50mV/div
1V/div
OUT
OUT
OUT
400ns/div
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SOURCING, VDD = 2.7V)
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SINKING, VDD = 2.7V)
VDIFF = 100mV
70
1V/div
OUT
60
50
40
30
-70
-80
100
4.0
OUTPUT VOLTAGE (V)
4.5
5.0
0.6
0.8
1.0
1.2
INPUT VOLTAGE NOISE
vs. FREQUENCY
VDIFF = 100mV
-50
MAX4230/34 toc23
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SINKING, VDD = 5.0V)
-100
-150
-250
0
0.4
OUTPUT VOLTAGE (V)
-200
50
0.2
0
0.5
1.0
1.5
2.0
OUTPUT VOLTAGE (V)
2.5
3.0
1.4
1.6
200
100
INPUT VOLTAGE NOISE (nV/√Hz)
150
0
OUTPUT VOLTAGE (V)
0
OUTPUT CURRENT (mA)
MAX4230/34 toc22
OUTPUT CURRENT (mA)
200
3.5
-50
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
VDIFF = 100mV
3.0
-40
-60
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SOURCING, VDD = 5.0V)
2.5
-30
10
0
2.0
-20
20
400ns/div
250
VDIFF = 100mV
-10
MAX4230/34 toc24
OUTPUT CURRENT (mA)
IN
0
MAX4230/34 toc21
80
OUTPUT CURRENT (mA)
MAX4230/34 toc19
400ns/div
MAX4230/34 toc20
LARGE-SIGNAL TRANSIENT
RESPONSE (INVERTING)
400ns/div
10
100
1k
10k
100k
FREQUENCY (Hz)
_______________________________________________________________________________________
7
MAX4230–MAX4234
____________________________Typical Operating Characteristics (continued)
(VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = VDD/2, RL = ∞, connected to VDD/2, V SHDN = VDD, TA = +25°C, unless otherwise noted.)
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
MAX4230–MAX4234
Pin Description
PIN
MAX4230
SOT23/
SC70
MAX4231
SOT23/
SC70/Thin
µDFN
MAX4232
SOT23/
µMAX
MAX4233
µMAX/
TDFN
MAX4233
UCSP
MAX4234T
SSOP/
SO
NAME
1
1
—
—
—
—
IN+
Noninverting Input
2
2
4
4
B4
11
VSS
Negative Supply Input. Connect to
ground for single-supply operation.
3
3
—
—
—
—
IN-
Inverting Input
4
4
—
—
—
—
OUT
Amplifier Output
5
6
8
10
B1
4
VDD
Positive Supply Input
—
5
—
5, 6
C4, A4
—
SHDN,
SHDN1,
SHDN2
—
—
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
—
—
—
—
—
10, 12
—
—
—
—
—
9, 13
IN3-, IN4-
8, 14
OUT3,
OUT4
—
—
—
—
—
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 (V SS + 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 current is less than or equal to 40mA, the maximum package
8
FUNCTION
Shutdown Control. Tie to high for normal
operation.
Amplifier 2 Output
IN3+, IN4+ Noninverting Input to Amplifiers 3 and 4
Inverting Input to Amplifiers 3 and 4
Amplifiers 3 and 4 Outputs
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:
PIC(DISS) ≅ VRMS IRMS COS θ
where:
VRMS = RMS voltage from VDD to VOUT when sourcing
current and RMS voltage from VOUT to VSS when sinking current.
IRMS = 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
MAX4230–MAX4234
RF
3.6V
CIN
RIN
LEFT
AUDIO INPUT
COUT
HEADPHONE JACK
TO 32Ω STEREO
HEADSET
R
C
VIN = 2VP-P
VBIAS
MAX4230
MAX4230
MAX4231
R
32Ω
CIN
RIN
RIGHT
AUDIO INPUT
COUT
RF
Figure 1. MAX4230/MAX4231 Used in Single-Supply Operation
Circuit Example
For example, the circuit in Figure 1 has a package
power dissipation of 196mW:
(
)
RMS ≅ VDD − VDC +
Figure 2. Circuit Example: Adding a Coupling Capacitor
Greatly Reduces Power Dissipation of its Package
VRMS ≅
VPEAK
= 3.6V − 1.8V +
2
1.0V
= 2.507VRMS
2
I
1.8V
1.0V / 32Ω
IRMS ≅ IDC + PEAK =
+
32Ω
2
2
= 78.4mARMS
where:
VDC = the DC component of the output voltage.
IDC = the DC component of the output current.
VPEAK = the highest positive excursion of the AC component of the output voltage.
IPEAK = the highest positive excursion of the AC component of the output current.
Therefore:
PIC(DISS) = VRMS IRMS 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:
=
VPEAK
2
1.0V
2
= 0.707VRMS
I
IRMS ≅ IDC + PEAK
2
= 22.1mARMS
= 0A +
1.0V / 32Ω
2
Therefore:
PIC(DISS) = VRMS IRMS 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:
f −3dB =
1
2πRINCIN
_______________________________________________________________________________________
9
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
C1
0.1μF
R1
16kΩ
R2
82kΩ
0.5VP-P
1/2
3V
3V
2
R5
51kΩ
C2
0.1μF
VCC = 3.0V
RL = 100kΩ
3
IN
1V/div
MAX4232
1
8
4
32Ω
fs = 100Hz
R4
10kΩ
R3
10kΩ
OUT
1V/div
6
R6
51kΩ
7
5
1/2
MAX4232
Figure 3. Dual MAX4230/MAX4231 Bridge Amplifier for 200mW
at 3V
Choose gain-setting resistors RIN and RF according to
the amount of desired gain, keeping in mind the maximum output amplitude. The output coupling capacitor,
COUT, 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:
f −3dB =
1
2πRLCOUT
For a 32Ω load, a 100µF aluminum electrolytic capacitor gives a low-frequency pole at 50Hz.
5μs/div
Figure 4. Rail-to-Rail Input/Output Range
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.)
Bridge Amplifier
Input Capacitance
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.
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.
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
(V SS + 1.2V), and the p-channel stage is active for
common-mode input voltages typically less than (VDD 1.2V).
10
______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
R
VOUT
MAX4230
R′ = R || Rf
RfCf = RCIN
CAPACITIVE LOAD (pF)
2000
Rf
VIN
MAX4230–MAX4234
2500
Cf
INVERTING
UNSTABLE
1500
STABLE
1000
500
VDD = 5.0V
RL TO VDD/2
0
1
10
100
1k
10k
100k
RESISTIVE LOAD (Ω)
NONINVERTING
VIN
Figure 6. Capacitive-Load Stability
VOUT
MAX4230
Rf
Cf
R
20mV/div
R′ = R || Rf
RfCf = RCIN
20mV/div
VDD = 3.0V, CL = 1500pF
RL = 100kΩ, RISO = 0Ω
Figure 5. Inverting and Noninverting Amplifiers with Feedback
Compensation
1μs/div
Figure 7. Small-Signal Transient Response with Excessive
Capacitive Load
To improve step response when R′ > 2kΩ, connect
small capacitor Cf between the inverting input and output. Choose Cf as follows:
Cf = 8(R / Rf) [pf]
where Rf is the feedback resistor and R is the gain-setting resistor (Figure 5).
20mV/div
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.
20mV/div
VDD = 3.0V, CL = 1500pF
RL = 100kΩ, RISO = 39Ω
1μs/div
Figure 8. Small-Signal Transient Response with Excessive
Capacitive Load with Isolation Resistor
______________________________________________________________________________________
11
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
SHDN
2V/div
IDD
1mA/div
RISO
CL
OUT
2V/div
100μs/div
Figure 9. Capacitive-Load-Driving Circuit
1V/div
Figure 11. Shutdown Enable/Disable Supply Current
VDD
2V/div
IDD
1mA/div
1V/div
4μs/div
Figure 10. Shutdown Output Voltage Enable/Disable
40μs/div
Figure 12. Power-Up/Down Supply Current
Selector Guide
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 VSS in 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 IDD to a shutdown
plus and voltage power-up cycle.
12
PART
AMPS PER
PACKAGE
SHUTDOWN
MODE
MAX4230
Single
—
MAX4231
Single
Yes
MAX4232
Dual
—
MAX4233
Dual
Yes
MAX4234
Quad
—
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
TOP VIEW
IN+ 1
VSS 2
5
VDD
IN+ 1
MAX4231
6
VDD
5
SHDN
VDD
SHDN
OUT
4
5
6
OUT1 1
IN1- 2
MAX4230
VSS 2
IN- 3
4
OUT
+
SC70/SOT23
10 VDD
IN1IN1+
2
3
MAX4233
9
OUT2
8
IN2-
A
VSS
IN-
IN1+ 3
6 IN2-
VSS 4
5 IN2+
SOT23/μMAX
Thin μDFN
3
IN2-
IN+
4
10
9
8
7
6
OUT1 1
14 OUT4
IN1- 2
13 IN4-
IN2+
SHDN2
12 IN4+
IN1+ 3
VSS
4
7 IN2+ B
SHDN1
5
6
μMAX
OUT2
2
3
SHDN2
1
2
IN2+
SOT23/SC70
1
IN2-
OUT
OUT2
4
VDD
IN- 3
7 OUT2
MAX4232
MAX4231
OUT1 1
8 VDD
VDD
MAX4233
VSS
MAX4233
IN2+ 5
SHDN2
C
MAX4234
VDD 4
OUT1
IN1-
IN1+
1
2
3
4
5
IN1-
IN1+
VSS
SHDN1
UCSP
OUT1
SHDN1
11 VSS
10 IN3+
IN2- 6
9 IN3-
OUT2 7
8 OUT3
TSSOP/SO
TDFN
TDFN EXPOSED PAD CONNECTED TO VSS
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)
PART
TEMP RANGE
PINPACKAGE
TOP
MARK
MAX4232AKA+T
-40°C to +125°C 8 SOT23
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
MAX4233ATB+T
-40°C to +125°C 10 TDFN-EP*
MAX4234AUD
-40°C to +125°C 14 TSSOP
AAKW
ABE
+AQH
MAX4234ASD
-40°C to +125°C 14 SO
+Denotes a lead-free/RoHS-compliant package.
T = Tape and reel.
*EP = Exposed pad.
—
—
Chip Information
MAX4230 TRANSISTOR COUNT: 230
MAX4231 TRANSISTOR COUNT: 230
MAX4232 TRANSISTOR COUNT: 462
MAX4233 TRANSISTOR COUNT: 462
MAX4234 TRANSISTOR COUNT: 924
______________________________________________________________________________________
13
MAX4230–MAX4234
Pin Configurations
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
PACKAGE TYPE
PACKAGE CODE
DOCUMENT NO.
5 SC70
X5-1
21-0076
6 SC70
X6SN-1
21-0077
5 SOT23
U5-1
21-0057
6 SOT23
U6SN-1
21-0058
8 µMAX
U8-1
21-0036
8 SOT23
K8-5
21-0078
10 UCSP
B12-4
21-0104
10 TDFN-EP
T1033-1
21-0137
6 Thin µDFN
Y61A1-1
21-0190
14 TSSOP
U14-1
21-0066
14 SO
S14-1
21-0041
SC70, 5L.EPS
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
PACKAGE OUTLINE, 5L SC70
21-0076
14
______________________________________________________________________________________
E
1
1
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
SC70, 6L.EPS
______________________________________________________________________________________
15
MAX4230–MAX4234
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
SOT-23 5L .EPS
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
16
______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
6LSOT.EPS
PACKAGE OUTLINE, SOT 6L BODY
21-0058
I
1
2
______________________________________________________________________________________
17
MAX4230–MAX4234
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
PACKAGE OUTLINE, SOT 6L BODY
21-0058
18
______________________________________________________________________________________
I
2
2
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
8LUMAXD.EPS
α
α
______________________________________________________________________________________
19
MAX4230–MAX4234
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
SOT23, 8L.EPS
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
MARKING
0
0
PACKAGE OUTLINE, SOT-23, 8L BODY
21-0078
20
______________________________________________________________________________________
H
1
1
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
12L, UCSP 4x3.EPS
PACKAGE OUTLINE, 4x3 UCSP
21-0104
F
1
1
______________________________________________________________________________________
21
MAX4230–MAX4234
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
6, 8, &10L, DFN THIN.EPS
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
22
______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
COMMON DIMENSIONS
PACKAGE VARIATIONS
SYMBOL
MIN.
MAX.
PKG. CODE
N
D2
E2
e
JEDEC SPEC
b
[(N/2)-1] x e
A
0.70
0.80
T633-2
6
1.50±0.10
2.30±0.10
0.95 BSC
MO229 / WEEA
0.40±0.05
1.90 REF
D
2.90
3.10
T833-2
8
1.50±0.10
2.30±0.10
0.65 BSC
MO229 / WEEC
0.30±0.05
1.95 REF
E
2.90
3.10
T833-3
8
1.50±0.10
2.30±0.10
0.65 BSC
MO229 / WEEC
0.30±0.05
1.95 REF
A1
0.00
0.05
T1033-1
10
1.50±0.10
2.30±0.10
0.50 BSC
MO229 / WEED-3
0.25±0.05
2.00 REF
L
0.20
0.40
T1033-2
10
1.50±0.10
2.30±0.10
0.50 BSC
MO229 / WEED-3
0.25±0.05
2.00 REF
k
0.25 MIN.
T1433-1
14
1.70±0.10
2.30±0.10
0.40 BSC
----
0.20±0.05
2.40 REF
A2
0.20 REF.
T1433-2
14
1.70±0.10
2.30±0.10
0.40 BSC
----
0.20±0.05
2.40 REF
______________________________________________________________________________________
23
MAX4230–MAX4234
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
6L ULTRA THINLGA.EPS
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
24
______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
TABLE 1
TABLE 2
______________________________________________________________________________________
25
MAX4230–MAX4234
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
Revision History
REVISION
NUMBER
REVISION
DATE
7
7/08
Added 6-pin µDFN package for the MAX4231
8
10/08
Corrected top mark for MAX4321, 6 SOT23 package; changed MAX4320 and
4321 to lead-free packages
DESCRIPTION
PAGES
CHANGED
1, 2, 8, 13
1
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implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
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© 2008 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.