19-2164; Rev 11; 9/09 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 a 6-pin SC70 package and in 1.5mm x 1.0mm ultra-thin UCSP and 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 Features o 200mA Output Drive Capability o Rail-to-Rail Input and Output o 1.1mA Supply Current per Amplifier o o o o o o 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 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) Ordering Information PART TEMP RANGE TOP MARK PINPACKAGE 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 RF PA Biasing Controls in Handset Applications MAX4231AUT+T -40°C to +125°C 6 SOT23 ABNF Portable/Battery-Powered Audio Applications MAX4231ART+T -40°C to +125°C 6 UCSP AAM Portable Headphone Speaker Drivers (32Ω) Audio Hands-Free Car Phones (Kits) Laptop/Notebook Computers/TFT Panels MAX4231AYT+TG65 -40°C to +125°C 6 Thin µDFN +Denotes a lead-free(Pb)/RoHS-compliant package. T = Tape and reel. Ordering Information continued at end of data sheet. Sound Ports/Cards +AI 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 6-Bump UCSP (derate 3.9mW/°C above +70°C) .....308.3mW 8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW Note 1: Package power dissipation should also be observed. µMAX is a registered trademark of Maxim Integrated Products, Inc. 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 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 Bump Temperature (soldering, reflow)*...........................+200°C *Hand soldering is not recommended. 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 IB VCM = VSS to VDD Input Offset Current IOS VCM = VSS to VDD Input Resistance RIN Common-Mode Input Voltage Range VCM MAX 5.5 V ±6 mV 50 Inferred from CMRR test VSS UNITS pA 50 pA 1000 MΩ VDD V Common-Mode Rejection Ratio CMRR VSS < VCM < VDD 52 70 dB Power-Supply Rejection Ratio PSRR VDD = 2.7V to 5.5V 73 85 dB ROUT V SHDN = 0V (Note 3) Shutdown Output Impedance Output Voltage in Shutdown Large-Signal Voltage Gain AVOL Output Voltage Swing VOUT RL = 100kΩ VSS + 0.20V < VOUT RL = 2kΩ < VDD - 0.20V RL = 200Ω RL = 200Ω RL = 2kΩ Output Source/Sink Current IOUT 68 85 98 74 80 VDD - VOH 400 500 VOL - VSS 360 500 80 120 VOL - VSS 70 120 VDD - VOH 8 14 VOL - VSS 7 14 VDD = 5V, VIN = ±100mV 200 VDD = 2.7V Output Voltage VDD = 5V mV dB VDD - VOH 70 IL = 30mA 120 100 VDD = 2.7V, VIN = ±100mV IL = 10mA Ω 10 VOUT(SHDN) V SHDN = 0V, RL = 200Ω (Note 3) RL = 32Ω 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) TYP MAX VDD = 5.5V, VCM = VDD / 2 CONDITIONS 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 = ∞ VIL Shutdown mode VIH Normal mode SHDN Input Bias Current MIN 0.8 VDD x 0.57 VSS < V S HDN < VDD (Note 3) 50 UNITS mA µA V 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 Inferred from CMRR test VSS CMRR VSS < VCM < VDD 46 Power-Supply Rejection Ratio PSRR VDD = 2.7V to 5.5V 70 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 IL = 10mA Output Voltage MAX V ±8 mV IL = 30mA, TA = -40°C to +85°C VDD = 2.7V µV/°C VDD 76 RL = 200Ω 67 V dB dB 150 RL = 2kΩ UNITS 5.5 ±3 Common-Mode Rejection Ratio Output Voltage in Shutdown TYP 2.7 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 VDD = 5V _______________________________________________________________________________________ 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) SHDN Logic Threshold (Note 3) CONDITIONS MIN TYP MAX VDD = 5.5V, VCM = VDD/2 2.8 VDD = 2.7V, VCM = VDD/2 2.5 V SHDN < 0V, RL = ∞ VIL Shutdown mode VIH Normal mode VDD = 5.5V 2.0 VDD = 2.7V 2.0 0.8 VDD x 0.61 UNITS mA µA V 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 Slew Rate SR 10 V/µs Phase Margin PM 70 Degrees Gain Margin GM 15 dB 0.0005 % 8 pF Total Harmonic Distortion Plus Noise Input Capacitance Voltage-Noise Density THD+N CIN en Channel-to-Channel Isolation Capacitive-Load Stability Shutdown Time Enable Time from Shutdown Power-Up Time f = 10kHz, VOUT = 2VP-P, AVCL = 1V/V f = 1kHz 15 f = 10kHz 12 f = 1kHz, RL = 100kΩ 125 dB AVCL = 1V/V, no sustained oscillations 780 pF 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 (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.) 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 10 OUTPUT CURRENT vs. OUTPUT VOLTAGE (SOURCING, VDD = 5.0V) 2.5 -30 -60 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) MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/µs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 Pin Description PIN MAX4231 MAX4230 MAX4232 MAX4233 MAX4233 MAX4234 SOT23/ MAX4231 SOT23/ SOT23/ TSSOP/ SC70/Thin UCSP µMAX UCSP SC70 µMAX SO µDFN 1 2 1 B1 2 A1 — 4 — 4 — B4 11 FUNCTION IN+ Noninverting Input VSS Negative Supply Input. Connect to ground for single-supply operation. Inverting Input 3 3 B2 — — — — IN- 4 4 A2 — — — — OUT Amplifier Output 5 6 A3 8 10 B1 4 VDD Positive Supply Input — 5 B3 — 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 Amplifier 2 Output — — — — — — 10, 12 IN3+, Noninverting Input to Amplifiers 3 and 4 — — — — — — 9, 13 — — — — — — 8, 14 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 power dissipation is not exceeded for any of the package 8 — NAME Shutdown Control. Tie to high for normal operation. IN3-, IN4- Inverting Input to Amplifiers 3 and 4 OUT3, OUT4 Amplifiers 3 and 4 Outputs 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 CIN RIN LEFT AUDIO INPUT COUT HEADPHONE JACK TO 32Ω STEREO HEADSET R C VIN = 2VP-P VBIAS R MAX4230–MAX4234 RF 3.6V MAX4230 MAX4230 MAX4231 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 ) + = 3.6V − 1.8V + Figure 2. Circuit Example: Adding a Coupling Capacitor Greatly Reduces Power Dissipation of its Package VRMS ≅ VPEAK 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 1.0V / 32Ω IRMS ≅ IDC + PEAK = 0A + 2 2 = 22.1mARMS 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 MAX4230–MAX4234 2500 Cf 2000 Rf VIN R VOUT MAX4230 R′ = R || Rf RfCf = RCIN CAPACITIVE LOAD (pF) 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 6 5 4 + OUT1 1 8 VDD IN1- 2 MAX4230 VSS 2 MAX4231 IN- 3 4 OUT IN- 3 4 OUT + SOT23/SC70 7 OUT2 MAX4232 SC70/SOT23 1 2 3 IN+ VSS IN- IN1+ 3 6 IN2- VSS 4 5 IN2+ SOT23/µMAX Thin µDFN 1 2 3 VSS OUT VDD 1 2 3 OUT2 IN2- IN2+ 4 + 10 VDD OUT1 1 IN1- 2 IN1+ 3 A A 9 OUT2 MAX4233 VSS 4 SHDN2 B MAX4233 VDD MAX4233 VSS 13 IN4- VDD 4 12 IN4+ MAX4234 IN2+ 5 6 SHDN2 µMAX 14 OUT4 IN1- 2 IN1+ 3 8 IN27 IN2+ SHDN1 5 OUT1 1 B IN+ IN- SHDN C OUT1 IN1- IN1+ SHDN1 UCSP 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. Chip Information MAX4230 TRANSISTOR COUNT: 230 MAX4231 TRANSISTOR COUNT: 230 MAX4232 TRANSISTOR COUNT: 462 MAX4233 TRANSISTOR COUNT: 462 MAX4234 TRANSISTOR COUNT: 924 11 VSS 10 IN3+ IN2- 6 9 IN3- OUT2 7 8 OUT3 UCSP TSSOP/SO 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 AAKW — 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 +Denotes a lead-free(Pb)/RoHS-compliant package. T = Tape and reel. *EP = Exposed pad. ______________________________________________________________________________________ — 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 6 UCSP R61A1+1 21-0228 10 UCSP B12-4 21-0104 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 ______________________________________________________________________________________ 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. 18 ______________________________________________________________________________________ High-Output-Drive, 10MHz, 10V/µs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 α α ______________________________________________________________________________________ 19 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. MARKING 0 0 PACKAGE OUTLINE, SOT-23, 8L BODY 21-0078 20 ______________________________________________________________________________________ I 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. UCSP.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 6L ULTRA THINLGA.EPS ______________________________________________________________________________________ 23 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. TABLE 1 TABLE 2 24 ______________________________________________________________________________________ High-Output-Drive, 10MHz, 10V/µs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 TSSOP4.40mm.EPS ______________________________________________________________________________________ 25 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. DIM A A1 B C e E H L N E H INCHES MILLIMETERS MAX MIN 0.069 0.053 0.010 0.004 0.019 0.014 0.010 0.007 0.050 BSC 0.157 0.150 0.228 0.244 0.050 0.016 MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .EPS MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/µs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 1.27 VARIATIONS: 1 INCHES TOP VIEW DIM D D D MIN 0.189 0.337 0.386 MAX 0.197 0.344 0.394 MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC D A B e FRONT VIEW A1 C 0∞-8∞ L SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, .150" SOIC APPROVAL 26 DOCUMENT CONTROL NO. 21-0041 ______________________________________________________________________________________ REV. B 1 1 High-Output-Drive, 10MHz, 10V/µs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 REVISION NUMBER REVISION DATE 7 7/08 Added 6-pin µDFN package for the MAX4231 10/08 Corrected top mark for MAX4321, 6 SOT23 package; changed MAX4320 and 4321 to lead-free packages 8 DESCRIPTION PAGES CHANGED 1, 2, 8, 13 1 9 10/08 Added shutdown pin limits 3, 4 10 12/08 Added automotive part number 13 11 9/09 Corrected top mark designation and pin configuration, and added UCSP package 1, 2, 8, 13 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 ____________________ 27 © 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc. MAX4230–MAX4234 Revision History