FAN4174

www.fairchildsemi.com FAN4174 Single, Ultra-Low Cost, Rail-to-Rail I/O, CMOS Amplifier Features at +5V • 200µA supply current per amplifier • 3.7MHz bandwidth • Output swing to within 10mV of either rail • Input voltage range exceeds the rails • 3V/µs slew rate • 25nV/√Hz input voltage noise • Competes with OPA340 and TLV2461 • Package options (SC70-5 and SOT23-5) • Fully specified at +2.7V and +5V supplies Description The FAN4174 is a single, ultra-low cost, voltage feedback amplifier with CMOS inputs that consumes only 200µA of supply current while providing ±33mA of output short circuit current. The FAN4174 is designed to operate from 2.5V to 5V supplies. The common mode voltage range extends beyond the negative and positive rails. The FAN4174 is designed on a CMOS process and provides 3.7MHz of bandwidth and 3V/µs of slew rate at a supply voltage of +5V. The combination of low power, rail-to-rail performance, low voltage operation, and tiny package options make the FAN4174 well suited for use in many general purpose and battery powered applications. Frequency Response vs. CL Vo = 50mV CL = 50pF Rs = 0 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 Magnitude (1dB/div) CL = 500pF Rs = 165Ω CL = 2000pF Rs = 65Ω CL = 1000pF Rs = 100Ω CL = 100pF Rs = 0 Rs Pin Assignments SOT23 + 5kΩ 5kΩ CL RL 0.1 1.0 10 Out -Vs +In 1 2 + 5 +Vs Frequency (MHz) Typical Application - +Vs 3 4 -In 6.8µF + SC70 +In + Rg 0.01µF Out Rf 6.8µF + Out -Vs +In 1 2 + 5 +Vs FAN4174 - 3 4 -In 0.01µF -Vs REV. 1D December 2004 DATA SHEET FAN4174 Electrical Specifications at +2.7V (VS = +2.7V, G = 2, RL = 10kΩ to VS/2, RF = 5kΩ; unless otherwise noted) Symbol UGBW BWSS GBWP tR, tF OS SR HD2 HD3 THD en VIO dVIO Ibn PSRR AOL IS RIN CIN CMIR CMRR VO Parameter Frequency Domain Response -3dB Bandwidth -3dB Bandwidth Gain Bandwidth product Time Domain Response Rise and Fall Time Overshoot Slew Rate Distortion and Noise Response 2nd Harmonic Distortion 3rd Harmonic Distortion Total Harmonic Distortion Input Voltage Noise DC Performance Input Offset Voltage1 Average Drift Input Bias Current Power Supply Rejection Ratio Open Loop Gain Quiescent Current Per Amplifier Input Characteristics Input Resistance Input Capacitance Input Common Mode Voltage Range Common Mode Rejection Ratio1 Output Characteristics Output Voltage Swing1 RL = 10kΩ to VS/2 RL = 1kΩ to VS/2 ISC VS Short Circuit Output Current Power Supply Operating Range 0.03 0.01to 2.65 2.69 0.05to 2.55 +12/-34 2.5 to 5.5 V V mA V typical DC, VCM = 0V to 2.2V 50 10 1.4 -0.3 to 2.6 65 GΩ pF V dB 1 1 Conditions G = +1 Min Typ 4 2.5 4 Max Units MHz MHz MHz ns % V/µs dBc dBc % nV/√Hz Vo = 1.0V step Vo = 1.0V step Vo = 3V step, G = -1 Vo =1Vpp, 10kHz Vo =1Vpp, 10kHz Vo =1Vpp, 10kHz 300 5 3 -66 -67 0.1 26 -6 0 2.1 5 +6 mV µV/°C pA dB dB DC DC 50 73 98 200 300 µA 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. 100% tested at 25°C. 2 REV. 1D December 2004 FAN4174 DATA SHEET Electrical Specifications at +5V (VS = +5V, G = 2, RL = 10kΩ to VS/2, RF = 5kΩ; unless otherwise noted) Symbol UGBW BWSS GBWP tR, tF OS SR HD2 HD3 THD en VIO dVIO Ibn PSRR AOL IS RIN CIN CMIR CMRR VO Parameter Frequency Domain Response -3dB Bandwidth -3dB Bandwidth Gain Bandwidth product Time Domain Response Rise and Fall Time Overshoot Slew Rate Distortion and Noise Response 2nd Harmonic Distortion 3rd Harmonic Distortion Total Harmonic Distortion Input Voltage Noise DC Performance Input Offset Voltage1 Average Drift Input Bias Current Power Supply Rejection Ratio Open Loop Gain Quiescent Current Per Amplifier Input Characteristics Input Resistance Input Capacitance Input Common Mode Voltage Range Common Mode Rejection Ratio1 Output Characteristics Output Voltage Swing1 RL = 10kΩ to VS/2 RL = 1kΩ to VS/2 ISC VS Short Circuit Output Current Power Supply Operating Range 0.03 0.01to 4.95 4.99 0.1 to 4.9 ±33 2.5 to 5.5 V V mA V typical DC, VCM = 0V to VS 58 10 1.2 -0.3 to 5.3 73 GΩ pF V dB 1 1 Conditions G = +1 Min Typ 3.7 2.3 3.7 Max Units MHz MHz MHz ns % V/µs dBc dBc % nV/√Hz Vo = 1.0V step Vo = 1.0V step Vo = 3V step, G = -1 Vo =1Vpp, 10kHz Vo =1Vpp, 10kHz Vo =1Vpp, 10kHz 300 5 3 -80 -80 0.02 25 -8 0 2.9 5 +8 mV µV/°C pA dB dB DC DC 50 73 102 200 300 µA 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. 100% tested at 25°C. REV. 1D December 2004 3 DATA SHEET FAN4174 Absolute Maximum Ratings (beyond which the device may be damaged) Parameter Supply Voltage Input Voltage Range Min 0 -VS -0.5V Max 6 +VS +0.5V Units V V Note: Functional operation under any of these conditions is NOT implied. Performance and reliability are guaranteed only if operating conditions are not exceeded. Recommended Operating Conditions Parameter Operating Temperature Range (Recommended) Min -40 Typ Max +85 Units °C Reliability Information Parameter Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10s) Thermal Resistance (θJA), 5 Lead SOT231 256 331.4 Thermal Resistance (θJA), 5 Lead SC701 Note: 1. Package thermal resistance (θJA), JDEC standard multi-layer test boards, still air. Min -65 Typ Max 175 +150 +300 Units °C °C °C °C/W °C/W 4 REV. 1D December 2004 FAN4174 DATA SHEET Typical Performance Characteristics (VS = +2.7V, G = 2, RL = 10kΩ to VS/2, RF = 5kΩ; unless otherwise noted) Non-Inverting Freq. Resp. (Vs = +5V) Normalized Magnitude (1dB/div) G=1 Rf = 0 G=2 Inverting Freq. Response (Vs = +5V) Normalized Magnitude (1dB/div) G = -1 G = -2 G = 10 G = -10 G=5 G = -5 Vo = 0.2Vpp Vo = 0.2Vpp 0.1 1.0 10 0.1 1.0 10 Frequency (MHz) Frequency (MHz) Non-Inverting Frequency Response Normalized Magnitude (1dB/div) G=1 Rf = 0 G=2 Inverting Frequency Response Normalized Magnitude (1dB/div) G = -1 G = -2 G = 10 G = -10 G=5 G = -5 Vo = 0.2Vpp Vo = 0.2Vpp 0.1 1.0 10 0.1 1.0 10 Frequency (MHz) Frequency (MHz) Frequency Response vs. CL Vo = 50mV CL = 50pF Rs = 0 Frequency Response vs. RL Magnitude (1dB/div) CL = 500pF Rs = 165Ω CL = 2000pF Rs = 65Ω Magnitude (1dB/div) CL = 1000pF Rs = 100Ω CL = 100pF Rs = 0 Rs RL = 10kΩ RL = 1kΩ RL = 200Ω RL = 50Ω Vo = 0.2Vpp + 5kΩ 5kΩ CL RL 0.1 1.0 10 0.1 1.0 10 Frequency (MHz) Frequency (MHz) Large Signal Freq. Resp. (Vs = +5V) 1 0 120 100 Vo = 1Vpp Vo = 2Vpp Open Loop Gain & Phase vs. Frequency Gain Open Loop Phase (Degree) Open Loop Gain (dB) Magnitude (1dB/div) -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 0.1 1.0 Vo = 4Vpp 80 60 40 20 0 -20 -40 Phase 0 -45 -90 -135 -180 10 1 10 100 1k 10k 100k 1M 10M Frequency (MHz) Frequency (Hz) REV. 1D December 2004 5 DATA SHEET FAN4174 Typical Performance Characteristics (VS = +2.7V, G = 2, RL = 10kΩ to VS/2, RF = 5kΩ; unless otherwise noted) 2nd & 3rd Harmonic Distortion -46 -48 -50 -52 -54 -56 -58 -60 -62 -64 -66 -68 -70 10 120 3rd; RL = 10kΩ 2nd Harmonic Distortion vs. Vo -45 100kHz 50kHz Distortion (dBc) 2nd; RL = 200kΩ 3rd; RL = 1kΩ 3rd; RL = 200kΩ 2nd; RL = 10kΩ 2nd; RL = 1kΩ Distortion (dBc) -50 -55 -60 -65 -70 -75 -80 -85 20kHz 10kHz 20 30 40 50 60 70 80 90 100 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 Frequency (kHz) Output Amplitude (Vpp) 3rd Harmonic Distortion vs. Vo 120 -45 100kHz CMRR Vs = 5V 80 70 60 50kHz 20kHz Distortion (dBc) -50 -55 -60 -65 -70 -75 -80 -85 0.5 0.75 1 1.25 1.5 1.75 2 CMRR (dB) 2.5 50 40 30 20 10 0 10kHz 2.25 10 100 1k 10k 100k Output Amplitude (Vpp) Frequency (Hz) PSRR Vs = 5V 80 70 60 1.35 Output Swing vs. Load Output Voltage (0.15V/div) 1.05 0.75 0.45 0.15 -0.15 -0.45 -0.75 -1.5 -1.35 -2 -1.5 -1 -0.5 RL = 100Ω RL = 1kΩ RL = 10kΩ RL = 200Ω RL = 75Ω PSRR (dB) 50 40 30 20 10 0 10 100 1k 10k 100k 0 0.5 1 1.5 2 Frequency (Hz) Input Voltage (0.5V/div) Pulse Resp. vs. Common Mode Voltage 1.5 Input Voltage Noise 75 70 65 60 55 50 45 40 35 30 25 20 15 0.1k 1k 10k 100k 1M Output Voltage (0.25V/div) 1.2V offset 0.6V offset no offset -0.6V offset -1.2V offset 1 0.5 0 -0.5 -1 -1.5 Time (0.5µs/div) Input Voltage Noise (nV/√Hz) G=1 Frequency (Hz) 6 REV. 1D December 2004 FAN4174 DATA SHEET Application Information General Description The FAN4174 amplifier is a single supply, general purpose, voltage-feedback amplifier. Fabricated on a bi-CMOS process. The FAN4174 features a rail-to-rail input and output and is unity gain stable. The typical non-inverting circuit schematic is shown in Figure 1. +Vs 6.8µF Overdrive Recovery 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 FAN4174 will typically recover in less than 500ns from an overdrive condition. Figure 3 shows the FAN4174 amplifier in an overdriven condition. In + Rg 0.01µF Out Rout Rf Input Voltage (0.5V/div) + G=5 VS = 2.7V Output Input FAN4174 Time (1µs/div) Figure 1: Typical Non-inverting Configuration Figure 3: Overdrive Recovery Input Common Mode Voltage The common mode input range extends to 300mV below ground and to 100mV 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. Driving Capacitive Loads The Frequency Response vs. CL plot, illustrates the response of the FAN4174 amplifier family. 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 500pF require the use of Rs. + Vin 10kΩ Rs Rf CL RL Vo Rg + 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. 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 FAN4174 amplifier family requires a 300Ω series resistor to drive a 100pF load. REV. 1D December 2004 7 DATA SHEET FAN4174 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. When evaluating only one channel, complete the following on the unused channel: 1. Ground the non-inverting input 2. Short the output to the inverting input Figure 5: FAN4174 Evaluation Board Schematic Evaluation Board Information The following evaluation boards are available to aid in the testing and layout of this device: Eval Bd KEB002 KEB011 Description Single Channel, Dual Supply, 5 and 6 lead SOT23 Single Channel, Dual Supply, 5 and 6 lead SC70 Products FAN4174AS5X FAN4174AP5X Evaluation board schematics are shown in Figures 5 and layouts are shown in Figure 6a and 6b. 8 REV. 1D December 2004 FAN4174 DATA SHEET Evaluation Board Layout Figure 6a: KEB002 (top side) Figure 6b: KEB002 (bottom side) REV. 1D December 2004 9 DATA SHEET FAN4174 Packaging Dimensions DATUM ’A’ SOT-23 b C L e 2 C L E C L E1 e1 D C L α C 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: 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. A A2 A1 SC70 b C L e L C L HE C L E Q1 SYMBOL e D b E HE Q1 A2 A1 A c L MIN MAX 0.65 BSC 1.80 2.20 0.15 0.30 1.15 1.35 1.80 2.40 0.10 0.40 0.80 1.00 0.00 0.10 0.80 1.10 0.10 0.18 1.10 0.30 D C L C NOTE: 1. 2. 3. 4. All dimensions are in millimeters. Dimensions are inclusive of plating. Dimensions are exclusive of mold flashing and metal burr. All speccifications comply to EIAJ SC70. A A2 A1 10 REV. 1D December 2004 FAN4174 DATA SHEET Ordering Information Model FAN4174 FAN4174 Part Number FAN4174IS5X_NL FAN4174IP5X_NL Lead Free Package SOT23-5 SC70-5 Container Reel Reel Pack Qty 3000 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. www.fairchildsemi.com © 2004 Fairchild Semiconductor Corporation