KM7101IT5TR3

www.fairchildsemi.com KM7101 Ultra-Low Cost, 136µA, 4.9MHz Rail-to-Rail I/O Amplifier Features Description • • • • • • • • • The KM7101 is an ultra-low cost, low power, voltage feedback amplifier that is pin compatible to the LMC7101. If a standard pinout is required, use the KM4170. The KM7101 uses only 136µA of supply current and offers no crossover distortion. The input common mode voltage range exceeds the negative and positive rails. 136µA supply current 4.9MHz bandwidth Output swings to within 20mV of either rail Input voltage range exceeds the rail by >250mV 5.3V/µs slew rate 16mA output current 21nV/√Hz input voltage noise Directly replaces LMC7101 in single supply applications Available in SOT23-5 package Applications Portable/battery-powered applications PCMCIA, USB Mobile communications, cellular phones, pagers Notebooks and PDA’s Sensor Interface A/D buffer Active filters Signal conditioning Portable test instruments Large Signal Frequency Response Vs = 5V Vo = 1Vpp Magnitude (1dB/div) • • • • • • • • • The KM7101 offers high bipolar performance at a low CMOS price. The KM7101 offers superior dynamic performance with a 4.9MHz small signal bandwidth and 5.3V/µs slew rate. The combination of low power, high bandwidth, and rail-to-rail performance make the KM7101 well suited for battery-powered communication/computing systems. Vo = 4Vpp Vo = 2Vpp KM7101 Package 0.01 SOT23-5 Out 5 1 0.1 1 10 Frequency (MHz) -Vs Output Swing vs. Load 3 RL = 10kΩ - 4 -In Output Voltage (0.27V/div) +In 2 + +Vs 1.35 RL = 1kΩ RL = 75Ω 0 RL = 100Ω RL = 200Ω RL = 75/100Ω -1.35 -2.0 0 2.0 Input Voltage (0.4V/div) REV. 4 December 2002 DATA SHEET KM7101 Absolute Maximum Ratings Parameter Supply Voltages Maximum Junction Temperature Storage Temperature Range Lead Temperature, 10 seconds Operating Temperature Range, recommended Input Voltage Range Iout Continuous Min. 0 – -65 – -40 -Vs -0.5 -30 Max. +6 +175 +150 +260 +85 +Vs +0.5 +30 Unit V °C °C °C °C V mA Max. Unit Electrical Specifications (Vs = +2.7V, G = 2, RL = 10kΩ to Vs/2, Rf = 5kΩ; unless otherwise noted) Parameter AC Performance -3dB Bandwidth1 Full Power Bandwidth Gain Bandwidth Product Rise and Fall Time Overshoot Slew Rate 2nd Harmonic Distortion 3rd Harmonic Distortion THD Input Voltage Noise DC Performance Input Offset Voltage2 Average Drift Input Bias Current2 Average Drift Power Supply Rejection Ratio2 Open Loop Gain Quiescent Current Per Channel2 Input Characteristics Input Resistance Input Capacitance Input Common Mode Voltage Range Common Mode Rejection Ratio2 Output Characteristics Output Voltage Swing2 Output Current Power Supply Operating Range Conditions Min. G = +1, Vo = 0.02Vpp G = +2, Vo = 0.2Vpp G = +2, Vo = 2Vpp 4.9 3.7 1.4 2.2 163 10kHz -6 DC RL = 10kΩ DC, Vcm = 0V to Vs RL = 10kΩ to Vs/2 RL = 1kΩ to Vs/2 RL = 200Ω to Vs/2 Typ. 55 0.5 5 90 32 83 90 136 MHz MHz MHz MHz ns % V/µs dBc dBc % nV/√Hz +6 420 190 mV µV/°C nA pA/°C dB dB µA 12 2 -0.25 to 2.95 81 MΩ pF V dB 0.06 to 2.64 0.02 to 2.68 0.05 to 2.63 0.11 to 2.52 ±16 2.5 2.7 V V V mA V 55 5.5 Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are determined from tested parameters. Notes: 1. For G = +1, Rf = 0. 2. For RL = 10kΩ, 100% tested at 25°C. 2 REV. 4 December 2002 KM7101 DATA SHEET Electrical Specifications (Vs = +5V, G = 2, RL = 10kΩ to Vs/2, Rf = 5kΩ; unless otherwise noted) Parameter AC Performance -3dB Bandwidth1 Full Power Bandwidth Gain Bandwidth Product Rise and Fall Time Overshoot Slew Rate 2nd Harmonic Distortion 3rd Harmonic Distortion THD Input Voltage Noise DC Performance Input Offset Voltage2 Average Drift Input Bias Current2 Average Drift Power Supply Rejection Ratio2 Open Loop Gain Quiescent Current Per Channel2 Input Characteristics Input Resistance Input Capacitance Input Common Mode Voltage Range Common Mode Rejection Ratio2 Output Characteristics Output Voltage Swing2 Conditions Min. G = +1, Vo = 0.02Vpp G = +2, Vo = 0.2Vpp G = +2, Vo = 2Vpp -8 DC, Vcm = 0V to Vs RL = 10kΩ to Vs/2 RL = 1kΩ to Vs/2 RL = 200Ω to Vs/2 Output Current Power Supply Operating Range Max. 4.3 3.0 2.3 2.0 110 10kHz DC RL = 10kΩ Typ. 40 1.5 15 90 40 60 80 160 Unit MHz MHz MHz MHz ns % V/µs dBc dBc % nV/√Hz +8 450 235 mV µV/°C nA pA/°C dB dB µA 12 2 -0.25 to 5.25 85 MΩ pF V dB 0.08 to 4.92 0.04 to 4.96 0.07 to 4.9 0.14 to 4.67 ±30 2.5 2.7 V V V mA V 58 5.5 Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are determined from tested parameters. Notes: 1. For G = +1, Rf = 0. 2. For RL = 10kΩ, 100% tested at 25°C. Package Thermal Resistance Package 5 lead SOT23 REV. 4 December 2002 θJA 256°C/W 3 DATA SHEET KM7101 Typical Operating Characteristics (Vs = +2.7V, G = 2, RL = 10kΩ to Vs/2, Rf = 5kΩ; unless otherwise noted) Inverting Frequency Response Vs = +5V Normalized Magnitude (1dB/div) Normalized Magnitude (1dB/div) Non-Inverting Freq. Response Vs = +5V Vo = 0.2Vpp G=1 Rf = 0 G=2 Rf = 5kΩ G = 10 Rf = 5kΩ G=5 Rf = 5kΩ 0.01 0.1 1 Vo = 0.2Vpp G = -2 Rf = 5kΩ G = -10 Rf = 5kΩ G = -5 Rf = 5kΩ 0.01 10 0.1 Frequency (MHz) Normalized Magnitude (1dB/div) Normalized Magnitude (1dB/div) G = 10 Rf = 5kΩ G=5 Rf = 5kΩ 0.01 0.1 10 Inverting Frequency Response G=1 Rf = 0 G=2 Rf = 5kΩ 1 Frequency (MHz) Non-Inverting Frequency Response Vo = 0.2Vpp G = -1 Rf = 5kΩ 1 Rf = 5kΩ G = -2 G = -1 G = -10 G = -5 0.01 10 0.1 1 10 Frequency (MHz) Frequency (MHz) Frequency Response vs. CL Frequency Response vs. RL CL = 100pF Rs = 100Ω CL = 50pF Rs = 0Ω Magnitude (1dB/div) Magnitude (1dB/div) Vo = 0.05V CL = 20pF Rs = 0 CL = 10pF Rs = 0 + Rs - CL 5kΩ RL = 1kΩ RL = 10kΩ RL = 200Ω RL = 50Ω RL 5kΩ 0.01 0.1 1 0.01 10 0.1 Frequency (MHz) 1 10 Frequency (MHz) Large Signal Frequency Response Open Loop Gain & Phase vs. Frequency 140 Magnitude (1dB/div) Vo = 4Vpp Vo = 2Vpp Open Loop Gain (dB) 120 Vo = 1Vpp |Gain| RL = 10kΩ Vs = 5V |Gain| No load 100 80 60 0 40 -45 -90 20 0 Phase RL = 10kΩ Phase No load 101 103 -135 -20 0.01 0.1 1 Frequency (MHz) 4 10 Open Loop Phase (deg) Vs = 5V -180 100 102 104 105 106 107 108 Frequency (Hz) REV. 4 December 2002 KM7101 DATA SHEET Typical Operating Characteristics (Vs = +2.7V, G = 2, RL = 10kΩ to Vs/2, Rf = 5kΩ; unless otherwise noted) 2nd & 3rd Harmonic Distortion 2nd Harmonic Distortion vs. Vo -20 -20 Vo = 1Vpp -40 3rd RL = 200Ω 3rd RL = 1kΩ 2nd RL = 200Ω -30 Distortion (dB) Distortion (dBc) -30 3rd RL = 10kΩ -50 -60 -70 -80 2nd RL = 1kΩ 2nd RL = 10kΩ -40 -50 50kHz -60 50kHz -70 10kHz, 20kHz -80 -90 10kHz -90 0 20 40 60 80 0.5 100 1 Frequency (kHz) 3rd Harmonic Distortion vs. Vo 2 2.5 CMRR 0 -10 -30 -20 50kHz -40 -50 CMRR (dB) Distortion (dB) 1.5 Output Amplitude (Vpp) -20 100kHz -60 20kHz -70 -30 -40 -50 -60 -70 10kHz -80 -80 -90 -90 0.5 1 1.5 2 10 2.5 100 Output Amplitude (Vpp) 1000 10000 100000 Frequency (Hz) PSRR Output Swing vs. Load 1.35 0 RL = 10kΩ Output Voltage (0.27V/div) -10 -20 PSRR (dB) 100kHz -30 -40 -50 -60 -70 -80 -90 RL = 1kΩ RL = 75Ω 0 RL = 100Ω RL = 200Ω RL = 75/100Ω -1.35 10 100 1000 10000 -2.0 100000 Frequency (Hz) 0 2.0 Input Voltage (0.4V/div) Input Voltage Noise Pulse Resp. vs. Common Mode Voltage 50 1.2V offset 45 0.6V offset 40 35 No offset -0.6V offset -1.2V offset nV/√Hz Output Voltage (0.5V/div) 55 30 25 20 15 10 5 0 Time (1µs/div) 0.1k 1k 10k 100k 1M Frequency (Hz) REV. 4 December 2002 5 DATA SHEET KM7101 Application Information Overdrive Recovery General Description Overdrive of an amplifier occurs when the output and/or input ranges are exceeded. The recovery time varies based on whether the input or output is overdriven and by how much the ranges are exceeded. The KM7101 will typically recover in less than 50ns from an overdrive condition. Figure 3 shows the KM7101 in an overdriven condition. The KM7101 is single supply, general purpose,voltage feedback amplifier that is pin-for-pin compatible with the National Semiconductor LMC7101. The KM7101 is fabricated on a complementary bipolar process, features a rail-to-rail input and output, and is unity gain stable. The typical non-inverting circuit schematic is shown in Figure 1. 6.8µF + + 0.01µF Input Out KM7101 - Output Input Voltage (0.5V/div) +Vs In G=5 Time (10µs/div) Rf Figure 3: Overdrive Recovery Rg Driving Capacitive Loads Figure 1: Typical Non-inverting Configuration Input Common Mode Voltage The common mode input range extends to 250mV below ground and to 250mV above Vs, in single supply operation. Exceeding these values will not cause phase reversal. However, if the input voltage exceeds the rails by more than 0.5V, the input ESD devices will begin to conduct. The output will stay at the rail during this overdrive condition. If the absolute maximum input voltage (700mV beyond either rail) is exceeded, externally limit the input current to ±5mA as shown in Figure 2. The Frequency Response vs. CL plot, illustrates the response of the KM7101. A small series resistance (Rs) at the output of the amplifier, illustrated in Figure 4, will improve stability and settling performance. Rs values in the Frequency Response vs. CL plot were chosen to achieve maximum bandwidth with less than 2dB of peaking. For maximum flatness, use a larger Rs. Capacitive loads larger than 50pF require the + Rs Rf CL RL Rg KM7101 Vin Vo + 10kΩ Figure 2: Circuit for Input Current Protection Power Dissipation The maximum internal power dissipation allowed is directly related to the maximum junction temperature. If the maximum junction temperature exceeds 150°C, some performance degradation will occur. If the maximum junction temperature exceeds 175°C for an extended time, device failure may occur. 6 use of Rs. Figure 4: Typical Topology for driving a capacitive load Driving a capacitive load introduces phase-lag into the output signal, which reduces phase margin in the amplifier. The unity gain follower is the most sensitive configuration. In a unity gain follower configuration, the KM7101 requires a 510Ω series resistor to drive a 100pF load. REV. 4 December 2002 KM7101 DATA SHEET Layout Considerations General layout and supply bypassing play major roles in high frequency performance. Fairchild has evaluation boards to use as a guide for high frequency layout and as aid in device testing and characterization. Follow the steps below as a basis for high frequency layout: • Include 6.8µF and 0.01µF ceramic capacitors • Place the 6.8µF capacitor within 0.75 inches of the power pin • Place the 0.01µF capacitor within 0.1 inches of the power pin • Remove the ground plane under and around the part, especially near the input and output pins to reduce parasitic capacitance • Minimize all trace lengths to reduce series inductances Refer to the evaluation board layouts shown in Figure 6 for more information. Evaluation Board Information The following evaluation boards are available to aid in the testing and layout of this device: Eval Bd KEB008 Description Single Channel, Dual Supply SOT23-5 for KM7101 type pinout Products 5 and Figure 6. Figure 5: Evaluation Board Schematic KM7101IT5 Evaluation board schematics and layouts are shown in Figure REV. 4 December 2002 7 DATA SHEET KM7101 KM7101 Evaluation Board Layout Figure 6a: KEB008 (top side) Figure 6b: KEB008 (bottom side) b SOT23-5 CL DATUM ’A’ KM7101 Package Dimensions e 2 CL CL E e1 α C D CL A 8 A2 E1 SYMBOL A A1 A2 b C D E E1 L e e1 α MIN 0.90 0.00 0.90 0.25 0.09 2.80 2.60 1.50 0.35 MAX 1.45 0.15 1.30 0.50 0.20 3.10 3.00 1.75 0.55 0.95 ref 1.90 ref 0 10 NOTE: A1 1. All dimensions are in millimeters. 2 Foot length measured reference to flat foot surface parallel to DATUM ’A’ and lead surface. 3. Package outline exclusive of mold flash & metal burr. 4. Package outline inclusive of solder plating. 5. Comply to EIAJ SC74A. 6. Package ST 0003 REV A supercedes SOT-D-2005 REV C. REV. 4 December 2002 KM7101 DATA SHEET Ordering Information Model KM7101 Part Number Package Container Pack Qty KM7101IT5TR3 SOT23-5 Reel 3000 Temperature range for all parts: -40°C to +85°C. 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A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. © 2001 Fairchild Semiconductor Corporation