The Future of Analog IC Technology MP121, MP221, MP421 High Speed, Rail-to-Rail Input-Output, and Single-Supply Op Amps DESCRIPTION The MP121(single), MP221(dual), and MP421(quad) are high-speed, high-voltage rail-to-rail input-output amplifiers for use as voltage reference buffers in Thin Film Transistor Liquid Crystal Displays (TFT-LCDs). The MP121 family provides excellent overall performance and versatility. The 2MHz 3dB bandwidth and 4V/ s slew rate make these amplifier suitable for many portable applications. The MP121, MP221, and MP421 are designed to operate at supply voltages as low as 3.2V and up to 2V at 1.6mA of supply current per amplifier. The MP121 family has true single supply capability. The input can swing.v below the negative rail and.v above the positive rail. The output can swing within 1mV of each rail. The MP421 quad channel is available in the space-saving 14-pin TSSOP package. The MP221 Dual channel is available in the 8-pin MSOP package and the MP121 single channel is available in -pin TSOT package. All feature a standard operational amplifier pin out. FEATURES 2MHz 3dB Bandwidth 4V/ s Slew Rate Single-Supply Operation: 3.2V to 2V Supply Current (per amplifier)1.6ma Unity-Gain Stable Output Swing within 1mV of Supply Rail Rail-to-Rail Input Capability High Output Drive Capability (ma) MP121 Available in TSOT- MP221 Available in MSOP-8 MP421 Available in TSSOP-14 APPLICATIONS TFT-LCD Drive Circuits Electronic Notebooks Electronic Games Touch-Screen Displays Personal Communication Devices Personal Digital Assistants (PDA) Portable Instrumentation Sampling ADC Amplifiers Wireless LAN Office Automation Active Filters ADC/DAC Buffer MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION Vs 1uF.1nF VIN U1 - MP121 Co TFT LCD GND 1uF.1nF Vs- MP121_MP221_MP421 Rev..91 www.monolithicpower.com 1
ORDERING INFORMATION Part Number Package Top Marking Free Air Temperature (T A ) MP121DJ* TSOT23-2R MP221DK** MOSP-8 221D MP421DM*** TSSOP-14 M421DM * For Tape and Reel, add suffix -Z (eg. MP121DJ-Z). For RoHS Compliant Packaging, add suffix-lf (eg. MP121DJ-LF-Z). ** For Tape and Reel, add suffix -Z (eg. MP221DK-Z). For RoHS Compliant Packaging, add suffix-lf (eg. MP221DK-LF-Z). *** For Tape and Reel, add suffix -Z (eg. MP421DM-Z). For RoHS Compliant Packaging, add suffix-lf (eg. MP421DM-LF-Z). MP121 (-PIN TSOT) TOP VIEW PACKAGE REFERENCE MP221 (8-PIN MSOP) TOP VIEW 4 C to 8 C VOUT 1 VS VOUTA 1 8 VS VS- 2 VINA- VINA 2 3 7 6 VOUTB VINB- VIN 3 4 VIN- VS- 4 VINB MP421 (14-PIN TSSOP) TOP VIEW VOUTA 1 14 VOUTD VINA- 2 13 VIND- VINA 3 12 VIND VS 4 11 VS- VINB 1 VINC VINB- 6 9 VINC- VOUTB 7 8 VOUTC MP121_MP221_MP421 Rev..91 www.monolithicpower.com 2
ABSOLUTE MAXIMUM RATINGS (1) (T A =2 C) Single Supply Voltage V S....3V to 23V Input Voltage... V S - -.V, V S.V Maximum Continuous Output Current... ma Maximum Die Temperature...12 C Storage Temperature... -6 C to 1 C Ambient Operating Temp... -4 C to 8 C Power Dissipation.... See Curves (2) Recommended Operating Conditions (3) Single Power Supply Operation V S...3.2V to 2V Operating Junct. Temp (T J )... 4 C to 12 C Thermal Resistance (4) θ JA θ JC MSOP...1... 6.. C/W TSOT...22... 11.. C/W TSSOP...4...6... C/W Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature T J (MAX), the junction-toambient thermal resistance θ JA, and the ambient temperature T A. The maximum allowable continuous power dissipation at any ambient temperature is calculated by P D (MAX) = (T J (MAX)-T A )/θ JA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on JESD1-7, 4-layer PCB MP121_MP221_MP421 Rev..91 www.monolithicpower.com 3
ELECTRICAL CHARACTERISTICS V S = 1V, V CM = V, = V, RL = 1kΩ and C L = 1pF, T A = T J =2 C, unless otherwise noted. Parameter Symbol Condition Min Typ Max Units INPUT CHARACTERISTICS Input Offset Voltage V OS 2 2 mv Average Offset Voltage Drift TCV OS μ/ C Input Bias Current I B. 2 μa Input Impedance R IN 1 GΩ Input Capacitance C IN 1.3 pf Common-Mode Range Common-Mode Rejection Ratio Input CMIR -.. V CMRR for from -.V to.v 6 8 db Open Loop Gain A VOL -4.V 4.V 6 db OUTPUT CHARACTERISTICS Output Swing Low V OL I L = -ma -4.9 V Output Swing High V OH I L = -ma 4.82 V Short Circuit Current I SC Sourcing 7 ma POWER SUPPLY PERFORMANCE Power Rejection Ratio Supply Supply Current (Per Amplifier) DYNAMIC PERFORMANCE Slew Rate (Rise/Fall) Settling to.1% (A V = 1) PSRR V S is moved from ±2.2V to ±7.7V 7 9 db I S No load 1.6 ma SR -4.V 4.V, 2% to 8% 4 V/μs t S (AV = 1), V O = 2V step ns -3dB Bandwidth BW R L = 1kΩ, C L = 1pF 2 MHz Gain-Bandwidth Product GBWP R L = 1kΩ, C L = 1pF 14 MHz Phase Margin PM R L = 1kΩ, C L = 1pF Channel Separation CS f = MHz (MP221 & MP421 only) 7 db MP121_MP221_MP421 Rev..91 www.monolithicpower.com 4
ELECTRICAL CHARACTERISTICS (continued) V S = 2V, V CM = 1V, = 1V, RL = 1kΩ and C L = 1pF, T A = 2 C, unless otherwise noted. Parameter Symbol Condition Min Typ Max Units INPUT CHARACTERISTICS Input Offset Voltage V OS 2 2 mv Average Offset Voltage Drift TCV OS μ/ C Input Bias Current I B. 2 μa Input Impedance R IN 1 GΩ Input Capacitance C IN 1.3 pf Common-Mode Range Common-Mode Rejection Ratio Input CMIR ±8 V CMRR for from -8V to 8V 6 8 db Open Loop Gain A VOL -9V 9V 6 db OUTPUT CHARACTERISTICS Output Swing Low V OL I L = -ma -4.9 V Output Swing High V OH I L = -ma 4.82 V Short Circuit Current I SC Sourcing 7 ma POWER SUPPLY PERFORMANCE Power Supply Rejection Ratio Supply Current (Per Amplifier) DYNAMIC PERFORMANCE Slew Rate Settling to.1% (A V = 1) PSRR V S is moved from ±2.2V to ±7.7V 7 9 db I S No load 1.6 ma SR -4.V 4.V, 2% to 8% 4 V/μs t S (AV = 1), V O = 2V step ns -3dB Bandwidth BW R L = 1kΩ, C L = 1pF 2 MHz Gain-Bandwidth Product GBWP R L = 1kΩ, C L = 1pF 14 MHz Phase Margin PM R L = 1kΩ, C L = 1pF Channel Separation CS f = MHz (MP221 & MP421 only) 7 db MP121_MP221_MP421 Rev..91 www.monolithicpower.com
TYPICAL PERFORMANCE CHARACTERISTICS V S =V, V S- =-V, R L =1KΩ, C L =12pF, T A =2ºC, unless otherwise noted. Supply Current (ma) 1.6 1.4 1.2 1.8.6.4.2 Supply Current vs. Supply Voltage MP121 2 4 6 8 1 12 14 16 18 Supply Voltage (V) V OS (mv) 2 1 1 - -1-1 V OS vs. -2-4 -3-2 -1 1 2 3 4 VIN ( V ) PSRR ( db ) 1 9 8 7 6 4 3 2 PSRR vs. Frequency 1.1 1 1 1 Frequency (khz ) Open Loop Closed Loop Av=1 Closed Loop Av=2 Gain (db) 8 6 4 2-2 Phase Gain Frequency ( khz ) 2 18 16 14 12 1 8 6 4 2-4 1 1 1 1 1 1 Gain (db) 2 4 1 3 2 1 1 Gain Gain (db) 2 4 1 3 2 Gain 1 1-1 - -1 Phase - -2 Phase -2-1 -3-3 -1-4 -1-4 -1 - -2 - -2.1 1 1 1 1 1 1.1 1 1 1 1 1 1 Frequency (khz) Frequency (khz) Gain (db) 16 12 8 4-4 -8-12 Frequency Response vs. C L 1pF pf pf 1pF -16 1 1 1 1 1 1 Magnitude (db) 4 3 2 1-1 -2-3 -4 Frequency Response vs. R L 1K 1K 6 6 1 Av=1 -.1 1 1 1 1 Output Noise vs. Frequency MP121 1.1 1 1 1 Frequency (khz) Frequency (khz) Frequency (Hz) 1 1 1 MP121_MP221_MP421 Rev..91 www.monolithicpower.com 6
TYPICAL PERFORMANCE CHARACTERISTICS (continued) V S =V, V S- =-V, R L =1KΩ, C L =12pF, T A =2ºC, unless otherwise noted. V s 2V/div.1V/div.1V/div.1V/div.V/div.V/div mv/div 2ns/div V s 1V/div.2V/div 1V/div 1V/div 1V/div V/div 4ns/div.2V/div 1V/div 2V/div 1V/div V/div MP121_MP221_MP421 Rev..91 www.monolithicpower.com 7
OPERATION DESCRIPTION The MP121/MP221/MP421 are high-speed, high slew rate, rail-to-rail input-output operational amplifiers. These devices can operate up to ma output current and 2MHz bandwidth. INPUT The MPX21 can operate with inputs from rail to rail. It does this through the use of two differential pairs. A traditional PNP differential pair is used from.v below the negative rail to 1V below the positive rail. At that point the input is switched to a NPN differential pair to operate up to.v above the positive rail. The transition from one input differential pair to the other can cause distortion. Inputs near the rails can also cause distortion and degradation of other specifications. OUTPUT Current Rating The MPX21 can sink or source ma. It can provide high values of peak current, and much reduced value of average current. When the output voltages are near the rails the ability to provide current will be reduced. Output Power Make sure that the rms power is such that the die junction temperature will remain below 12ºC Transients In addition to the ripple and noise on the power supplies, there are also transient voltage changes. This can be caused by another device on the same power supply suddenly drawing current or suddenly stopping a current draw. The design engineer should insure that there are no damaging transients induced on the power supply lines when the op amp suddenly changes current delivery. LAYOUT Ground Plane Connect the opamp to a ground plane rather than ground traces for very low impedance. If this is not possible then make the ground traces as fat and short as possible. Decoupling High performance devices such as the MPX21, with high slew rates and high currents, need large decoupling capacitors. These should be placed as close to the supply pins as possible. Use ground and power planes to make these decoupling capacitors as effective as possible. If that is not realistic then make the ground and power traces as thick and short as possible. Power Requirements The MPX21 operates from a voltage supply, of ±Vs and ground, or from a Vs split supply. Single-ended voltage range is 3.2V to 2V. PSRR and Noise A common figure of merit is the PSRR (Power Supply Rejection Ratio). The PSRR is a measure of how much noise gets from the supply rails into the output. Notice that the PSRR falls with increasing frequency. In order to have good PSRR the ripple voltages and frequencies of the systems switching power supplies should be measured. If the PSRR is not acceptable, inductors can be inserted in series with the power supply rails to provide improved PSRR. Also make sure there are no transients created on the power supply lines when the MPX21 load current changes suddenly. This can damage the part. MP121_MP221_MP421 Rev..91 www.monolithicpower.com 8
PACKAGE INFORMATION TSOT23-2.8 3..6 TYP.9 BSC 4 1.2 TYP 1. 1.7 2.6 3. 2.6 TYP 1 3 TOP VIEW RECOMMENDED LAND PATTERN.84.9.3..9 BSC..1 1. MAX SEATING PLANE SEE DETAIL "A".9.2 FRONT VIEW SIDE VIEW NOTE: GAUGE PLANE.2 BSC o -8 o DETAIL A.3. 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURR. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE.1 MILLIMETERS MAX. ) DRAWING CONFORMS TO JEDEC MO-193, VARIATION AA. 6) DRAWING IS NOT TO SCALE. MP121_MP221_MP421 Rev..91 www.monolithicpower.com 9
PACKAGE INFORMATION MSOP8 8.114(2.9).122(3.1) PIN 1 ID (NOTE ).114(2.9).122(3.1).187(4.7).199(.).1(.2).14(.3) 1 4.26(.6)BSC BOTTOM VIEW TOP VIEW.3(.7).37(.9).43(1.1)MAX SEATING PLANE.2(.).6(.1) GAUGE PLANE.1(.2) o -6 o.16(.4).26(.6).4(.1).8(.2) FRONT VIEW SIDE VIEW.4(1.).181(4.6) NOTE: 1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN BRACKET IS IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURR. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE.4" INCHES MAX. ) PIN 1 IDENTIFICATION HAS HALF OR FULL CIRCLE OPTION. 6) DRAWING MEETS JEDEC MO-187, VARIATION AA. 7) DRAWING IS NOT TO SCALE..16(.4).26(.6)BSC RECOMMENDED LAND PATTERN MP121_MP221_MP421 Rev..91 www.monolithicpower.com 1
PACKAGE INFORMATION TSSOP14 NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP121_MP221_MP421 Rev..91 www.monolithicpower.com 11
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