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 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 26 © 2008 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.