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MAX4232AKA-T |MAX4232AKATMAXN/a157avaiHigh-output-drive, 10 MHz, 10V/us, rail-to-rail I/O op amps with shutdown in SC70
MAX4233AUBMAXN/a4avaiHigh-output-drive, 10 MHz, 10V/us, rail-to-rail I/O op amps with shutdown in SC70
MAX4234AUDMAXIMN/a2avaiHigh-output-drive, 10 MHz, 10V/us, rail-to-rail I/O op amps with shutdown in SC70


MAX4232AKA-T ,High-output-drive, 10 MHz, 10V/us, rail-to-rail I/O op amps with shutdown in SC70ApplicationsMAX4231AUT-T -40°C to +125°C 6 SOT23-6 AAUVPortable Headphone Speaker Drivers (32Ω )Ord ..
MAX4232AUA+ ,High-Output-Drive, 10MHz, 10V/µs, Rail-to-Rail I/O Op Amps with Shutdown in SC70Electrical Characteristics (continued)(V = 2.7V, V = 0V, V = V , V = (V ), R = ∞ connected to (V ), ..
MAX4232AUA+ ,High-Output-Drive, 10MHz, 10V/µs, Rail-to-Rail I/O Op Amps with Shutdown in SC70ApplicationsMAX4230AUK+T -40°C to +125°C 5 SOT23 ABZZ● RF PA Biasing Controls in Handset
MAX4232AUA+T ,High-Output-Drive, 10MHz, 10V/µs, Rail-to-Rail I/O Op Amps with Shutdown in SC70Electrical Characteristics (continued)(V = 2.7V, V = 0V, V = V , V = (V ), R = ∞ connected to (V ), ..
MAX4232AUA+T ,High-Output-Drive, 10MHz, 10V/µs, Rail-to-Rail I/O Op Amps with Shutdown in SC70Electrical Characteristics (continued)(V = 2.7V, V = 0V, V = V , V = (V ), R = ∞ connected to (V ), ..
MAX4233ABC+T ,High-Output-Drive, 10MHz, 10V/µs, Rail-to-Rail I/O Op Amps with Shutdown in SC70ApplicationsMAX4231AXT+T -40°C to +125°C 6 SC70 ABA● Portable/Battery-Powered Audio
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MAX809SEUR-T10 ,3-Pin Microprocessor Reset CircuitsApplicationsMAX810_EUR-T -40°C to +105°C 3 SOT23-3MAX810_EUR-T10 -40°C to +105°C 3 SOT23-3Computers ..
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MAX4232AKA-T-MAX4233AUB-MAX4234AUD
High-output-drive, 10 MHz, 10V/us, rail-to-rail I/O op amps with shutdown in SC70
General Description
The MAX4230–MAX4234 single/dual/quad, high-output-
drive 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. The dual op-amp MAX4233 is
offered in the space-saving 10-bump UCSP™, provid-
ing the smallest footprint area for a dual op amp with
shutdown.
These op amps are designed to be part of the PA con-
trol circuitry, biasing RF PAs in wireless headsets. The
MAX4231/MAX4233 offer a SHDNfeature that drives
the output low. This ensures that the RF PA is fully dis-
abled 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 space-
saving 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
30mA Output Drive CapabilityRail-to-Rail Input and Output1.1mA Supply Current per Amplifier2.7V to 5.5V Single-Supply Operation10MHz Gain-Bandwidth ProductHigh Slew Rate: 10V/µs100dB Voltage Gain (RL= 100kΩ)85dB Power-Supply Rejection RatioNo Phase Reversal for Overdriven InputsUnity-Gain Stable for Capacitive Loads to 780pFLow-Power Shutdown Mode Reduces Supply
Current to <1µA
Available in 5-Pin SC70 Package (MAX4230)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

19-2164; Rev 4; 5/04
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
Typical Operating Circuit
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
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....................................(VSS- 0.3V) + (VDD+ 0.3V)
Output Short-Circuit Duration to VDDor VSS(Note 1)..................1s
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
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
14-Pin TSSOP (derate 9.1mW/°C above +70°C) ........727mW
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.
DC ELECTRICAL CHARACTERISTICS

(VDD= 2.7V, VSS= 0V, VCM= VDD/2, VOUT= (VDD/2), RL= ∞connected to (VDD/2), VSHDN= VDD, TA= +25°C, unless otherwise
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), VSHDN= VDD, TA= +25°C, unless otherwise
noted.) (Note 2)
DC ELECTRICAL CHARACTERISTICS

(VDD= 2.7V, VSS= 0V, VCM= VDD/2, VOUT= (VDD/2), RL= ∞connected to (VDD/2), VSHDN= VDD, TA= -40 to +125°C, unless oth-
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
Note 2:
All units 100% tested at +25°C. All temperature limits are guaranteed by design.
Note 3:
SHDN logic parameters are for MAX4231/MAX4233 only.
DC ELECTRICAL CHARACTERISTICS (continued)

(VDD= 2.7V, VSS= 0V, VCM= VDD/2, VOUT= (VDD/2), RL= ∞connected to (VDD/2), VSHDN= VDD, TA= -40 to +125°C, unless oth-
erwise noted.) (Note 2)
AC ELECTRICAL CHARACTERISTICS

(VDD= 2.7V, VSS= 0V, VCM= VDD/2, VOUT= (VDD/2), RL= ∞connected to (VDD/2), VSHDN= VDD, TA= +25°C, unless otherwise noted.)
(Note 2)
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
GAIN AND PHASE vs. FREQUENCY

FREQUENCY (Hz)
0.01k10k100k1M10M0.1k1k100M
GAIN (dB)
PHASE (DEGREES)
MAX4230 toc01
GAIN AND PHASE vs. FREQUENCY
(CL = 250pF)

FREQUENCY (Hz)
0.01k10k100k1M10M0.1k1k100M
GAIN (dB)
PHASE (DEGREES)
MAX4230 toc02
SUPPLY CURRENT vs. TEMPERATURE

MAX4230 toc05
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY

FREQUENCY (Hz)
0.01k10k100k1M0.1k1k10M
MAX4230 toc03
PSRR (dB)
0.01100k1M10k10M
OUTPUT IMPEDANCE vs. FREQUENCY

MAX4230 toc04
FREQUENCY (Hz)
OUTPUT IMPEDANCE (
MAX4230 toc06
TEMPERATURE (°C)
SUPPLY CURRENT (nA)
SUPPLY CURRENT vs. TEMPERATURE
(SHDN = LOW)
__________________________________________Typical Operating Characteristics

(VDD= 2.7V, VSS= 0V, VCM= VDD/2, VOUT= VDD/2, RL= ∞, connected to VDD/2, VSHDN= VDD, TA = +25°C, unless otherwise noted.)
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70

MAX4230 toc07
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
SUPPLY CURRENT PER AMPLIFIER
vs. SUPPLY VOLTAGE

MAX4230 toc08
TEMPERATURE (°C)
(mV)
INPUT OFFSET VOLTAGE
vs. TEMPERATURE

OUTPUT SWING HIGH
vs. TEMPERATURE
MAX4230/34 toc09
TEMPERATURE (°C)
- V
OUT
(mV)
OUTPUT SWING LOW
vs. TEMPERATURE
MAX4230/3 toc10
TEMPERATURE (°C)
OUT
- V
(mV)
SUPPLY CURRENT PER AMPLIFIER
vs. COMMON-MODE VOLTAGE
MAX4230/34 toc13
COMMON-MODE VOLTAGE (V)
SUPPLY CURRENT (mA)
INPUT OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
MAX4230/3 toc11
COMMON-MODE VOLTAGE (V)
INPUT OFFSET VOLTAGE (mV)
SUPPLY CURRENT PER AMPLIFIER
vs. COMMON-MODE VOLTAGE
MAX4230/3 toc12
COMMON-MODE VOLTAGE (V)
SUPPLY CURRENT (mA)
0.451001k10k100k
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY

MAX4230/34 toc14
FREQUENCY (Hz)
THD+N (%)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. PEAK-TO-PEAK OUTPUT VOLTAGE
MAX4230/34 toc15
PEAK-TO-PEAK (V)
THD+N (%)
____________________________Typical Operating Characteristics(continued)
(VDD= 2.7V, VSS= 0V, VCM= VDD/2, VOUT= VDD/2, RL= ∞, connected to VDD/2, VSHDN= VDD, TA = +25°C, unless otherwise noted.)
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70

400ns/div
SMALL-SIGNAL TRANSIENT
RESPONSE (NONINVERTING)

50mV/div
MAX4230/34 toc16
OUT
400ns/div
SMALL-SIGNAL TRANSIENT
RESPONSE (INVERTING)

50mV/div
MAX4230/34 toc17
OUT
400ns/div
LARGE-SIGNAL TRANSIENT
RESPONSE (NONINVERTING)

1V/div
MAX4230/34 toc18
OUT
400ns/div
LARGE-SIGNAL TRANSIENT
RESPONSE (INVERTING)

1V/div
MAX4230/34 toc19
OUT
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SOURCING, VDD = 5.0V)
MAX4230/34 toc22
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SOURCING, VDD = 2.7V)
MAX4230/34 toc20
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SINKING, VDD = 2.7V)
MAX4230/34 toc21
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SINKING, VDD = 5.0V)
MAX4230/34 toc23
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
10010k100k
FREQUENCY (Hz)
INPUT VOLTAGE NOISE (nV/
Hz)
INPUT VOLTAGE NOISE
vs. FREQUENCY

MAX4230/34 toc24
____________________________Typical Operating Characteristics (continued)

(VDD= 2.7V, VSS= 0V, VCM= VDD/2, VOUT= VDD/2, RL= ∞, connected to VDD/2, VSHDN= VDD, TA = +25°C, unless otherwise noted.)
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 typi-
cally greater than (VSS+ 1.2V), and the P-channel
stage is active for common-mode input voltages typi-
cally 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-dissi-
pation 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 fol-
lowing equations. The equation below gives an approxi-
mation of the package power dissipation:
where:
VRMS= RMS voltage from VDDto VOUT when sourcing
current and RMS voltage from VOUTto VSS when sink-
ing current.
IRMS= RMS current flowing out of or into the op amp
and the load.= phase difference between the voltage and the cur-
rent. For resistive loads, COS θ= 1.
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
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.
VPEAK= the highest positive excursion of the AC com-
ponent of the output voltage.
IPEAK= the highest positive excursion of the AC com-
ponent of the output current.
Therefore:
PIC(DISS)= VRMSIRMSCOS 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:
PIC(DISS)= VRMSIRMSCOS θ
= 15.6mW
If the configuration in Figure 1 were used with all four of
the MAX4234 amplifiers, the absolute maximum power-
dissipation rating of this package would be exceeded
(see the Absolute Maximum Ratingssection).
60mW Single-Supply Stereo
Headphone Driver

Two MAX4230/MAX4231s can be used as a single-sup-
ply, stereo headphone driver. The circuit shown in
Figure 2 can deliver 60mW per channel with 1% distor-
tion 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
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