Datasheet

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General Description

The MAX4230–MAX4234 single/dual/quad, high-output

drive CMOS op amps feature 200mA of peak output cur-

rent, 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 head-

set 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 cir-

cuitry, 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.

Applications

● RF PA Biasing Controls in Handset Applications

● Portable/Battery-Powered Audio Applications

● Portable Headphone Speaker Drivers (32Ω)

● Audio Hands-Free Car Phones (Kits)

● Tablet/Notebook Computers

● Digital-to-Analog Converter Buffers

● Transformer/Line Drivers

● Motor Drivers

Benets and Features

● Optimized for Headsets and High-Current Outputs

• 200mA Output Drive Capability

• 100dB Voltage Gain (R

= 100kΩ)

• 85dB Power-Supply Rejection Ratio

• No Phase Reversal for Overdriven Inputs

• Unity-Gain Stable for Capacitive Loads to 780pF

● Suitable for High-Bandwidth Applications

• 10MHz Gain-Bandwidth Product

• High Slew Rate: 10V/μs

● Extends the Battery Life of Portable Applications

• 1.1mA Supply Current per Amplier

● Low-Power Shutdown Mode Reduces Supply Current

to < 1μA

● Small Package Options

• Tiny, 2.1mm x 2.0mm Space-Saving SC70 Package

Selector Guide appears at end of data sheet.

Pin/Bump Configurations appear at end of data sheet.

Ordering Information continued at end of data sheet.

Visit www.maximintegrated.com/products/patents for product

patent marking information.

UCSP is a trademark of Maxim Integrated Products, Inc.

+Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

PART

TEMP

RANGE

PIN-

PACKAGE

TOP

MARK

MAX4230AXK+T -40°C to +125°C 5 SC70 ACS

MAX4230AXK/V+T -40°C to +125°C 5 SC70 +AUU

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

(Ultra-Thin LGA)

+AH

MAX4231

DAC

SHDN

ISO

LOAD

= 30mA

ANTENNA

2.7V TO 5.5V

MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/μs,

Rail-to-Rail I/O Op Amps with Shutdown in SC70

19-2164; Rev 19; 1/15

Typical Operating Circuit

Ordering Information

Summary of content (15 pages)

PAGE 1
MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/μs, 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.
PAGE 2
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) to (VDD + 0.3V) Output Short-Circuit Duration to VDD or VSS (Note 1) ...............10s Continuous Power Dissipation (Multilayer, TA = +70°C) 5-Pin SC70 (derate 3.1mW/°C above +70°C) ..............247mW 5-Pin SOT23 (derate 3.9mW/°C above +70°C).
PAGE 3
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) PARAMETER Output Source/Sink Current SYMBOL IOUT CONDITIONS IDD Shutdown Supply Current (per Amplifier) (Note 3) IDD(SHDN) SHDN Logic Threshold (Note 3) VDD = 5V, VIN = ±100mV 200 IL = 10mA VDD = 2.
PAGE 4
MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/μs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 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 other wise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS VDD = 2.
PAGE 5
MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/μs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 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.) GAIN AND PHASE vs. FREQUENCY (CL = 250pF) 120 60 90 50 60 40 30 30 0 20 -30 10 -60 0 -90 -10 -120 AV = 1000V/V -30 0.01k 0.
PAGE 6
MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/μs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 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.) 1.8 1.6 MAX4230 toc08 2 MAX4230 toc07 2.0 VDD = 2.7V 1.0 0.8 0.6 80 VDD - VOUT (mV) 1.2 VDD = 5.0V 0 -1 0.4 VDD = 5.0V RL = 200Ω 100 1 1.4 VOS (mV) SUPPLY CURRENT (mA) OUTPUT SWING HIGH vs.
PAGE 7
MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/μs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 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.
PAGE 8
MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/μs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 Pin Description PIN BUMP MAX4231 MAX4230 MAX4232 SOT23/ MAX4233 MAX4234 MAX4231 SOT23/ SOT23/ SC70/Thin TSSOP/SO µMAX UCSP SC70 µMAX µDFN MAX4233 UCSP NAME FUNCTION 1 1 — — — B1 — IN+ Noninverting Input 2 2 4 4 11 A1 B4 VSS Negative Supply Input. Connect to ground for singlesupply operation.
PAGE 9
MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/μs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 RF 3.6V LEFT AUDIO INPUT CIN RIN COUT HEADPHONE JACK TO 32Ω STEREO HEADSET R C MAX4230 MAX4231 VIN = 2VP-P VBIAS MAX4230 R COUT 32Ω RIGHT AUDIO INPUT 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 ) + = 3.6V − 1.8V + VPEAK 2 1.0V = 2.507VRMS 2 I 1.8V 1.
PAGE 10
MAX4230–MAX4234 C1 0.1mF R1 16kΩ R2 82kΩ 0.5VP-P 3V 3V 2 R5 51kΩ C2 0.1µF High-Output-Drive, 10MHz, 10V/μs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 32W fS = 100Hz 1/2 MAX4232 8 3 VCC = 3.0V RL = 100kΩ 1 4 R4 10kΩ R3 10kΩ 6 R6 51kΩ 5 IN 1V/div OUT 1V/div 7 1/2 MAX4232 5µs/div Figure 3. Dual MAX4230/MAX4231 Bridge Amplifier for 200mW at 3V Figure 4.
PAGE 11
MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/μs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 2500 Rf VIN R MAX4230 VOUT R’ = R || Rf RfCf = RCIN CAPACITIVE LOAD (pF) Cf INVERTING 2000 UNSTABLE 1500 STABLE 1000 500 0 VDD = 5.0V RL TO VDD/2 1 10 100 1k 10k 100k RESISTIVE LOAD (Ω) NONINVERTING VIN Figure 6. Capacitive-Load Stability MAX4230 VOUT Rf 20mV/div Cf R’ = R || Rf RfCf = RCIN R 20mV/div VDD = 3.0V, CL = 1500pF RL = 100kΩ, RISO = 0Ω 1µ/div Figure 5.
PAGE 12
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 40µs/div Figure 10. Shutdown Output Voltage Enable/Disable Figure 12. Power-Up/Down Supply Current The resistor improves the circuit’s phase margin by isolating the load capacitor from the op amp’s output.
PAGE 13
MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/μs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 Pin/Bump Configurations TOP VIEW IN+ 1 VSS 2 + 5 VDD IN+ 1 + 6 VDD VSS 2 5 SHDN IN- 3 4 OUT MAX4231 IN- 3 4 OUT SC70/SOT23 1 IN1- 2 IN1+ 3 10 VDD MAX4233 VSS 4 A 9 OUT2 VSS 6 5 4 OUT1 1 2 OUT 1 2 3 8 VDD 3 1 IN+ VSS IN- A VDD 2 OUT2 3 IN2- IN2+ MAX4232 MAX4231 VDD MAX4233 4 SHDN2 OUT1 1 + 14 OUT4 13 IN4- IN1- 2 VSS VDD 4 12 IN4+ MAX4234 IN+ IN- SHD
PAGE 14
MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/μs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.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 DOCUMENT NO. LAND PATTERN NO.
PAGE 15
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 PAGES CHANGED 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 9 10/08 Added shutdown pin limits 10 12/08 Added automotive part number 11 9/09 Corrected top mark designation and pin configuration, and added UCSP package 12 1/10 Updated Absolut