www.fairchildsemi.com FAN4174 Single, Ultra-Low Cost, Rail-to-Rail I/O, CMOS Amplifier Features at +5V Description • 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 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. • 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 Pin Assignments Frequency Response vs. CL CL = 50pF Rs = 0 Vo = 50mV Magnitude (1dB/div) Applications 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. CL = 500pF Rs = 165Ω CL = 1000pF Rs = 100Ω CL = 2000pF Rs = 65Ω + CL = 100pF Rs = 0 Rs - CL 5kΩ RL 5kΩ SOT23 0.1 1 -Vs 2 +In 3 5 1.0 +Vs 10 Frequency (MHz) Typical Application + Out - +Vs 4 SC70 Out 2 + -Vs + +In 5 1 6.8µF -In 0.01µF + +Vs - Rf Rg - Out FAN4174 6.8µF + +In 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 Parameter Conditions Min Typ Max Units Frequency Domain Response UGBW -3dB Bandwidth BWSS -3dB Bandwidth GBWP Gain Bandwidth product G = +1 4 MHz 2.5 MHz 4 MHz Time Domain Response tR, tF Rise and Fall Time Vo = 1.0V step 300 ns OS Overshoot Vo = 1.0V step 5 % SR Slew Rate Vo = 3V step, G = -1 3 V/µs Distortion and Noise Response 2nd Harmonic Distortion Vo =1Vpp, 10kHz -66 dBc HD3 3rd Harmonic Distortion Vo =1Vpp, 10kHz -67 dBc THD Total Harmonic Distortion Vo =1Vpp, 10kHz 0.1 % en Input Voltage Noise 26 nV/√Hz HD2 DC Performance VIO dVIO Ibn Input Offset Voltage1 -6 Average Drift Input Bias Current 1 PSRR Power Supply Rejection Ratio AOL Open Loop Gain IS DC 50 DC 1 Quiescent Current Per Amplifier 0 +6 mV 2.1 µV/°C 5 pA 73 dB 98 dB 200 300 µA Input Characteristics RIN Input Resistance 10 GΩ CIN Input Capacitance 1.4 pF CMIR Input Common Mode Voltage Range typical -0.3 to 2.6 V CMRR Common Mode Rejection Ratio1 DC, VCM = 0V to 2.2V 65 dB RL = 10kΩ to VS/2 0.03 0.01to 2.65 2.69 V RL = 1kΩ to VS/2 0.05to 2.55 V 50 Output Characteristics VO Output Voltage Swing1 ISC Short Circuit Output Current +12/-34 mA VS Power Supply Operating Range 2.5 to 5.5 V 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 Parameter Conditions Min Typ Max Units 3.7 MHz Frequency Domain Response UGBW -3dB Bandwidth G = +1 BWSS -3dB Bandwidth 2.3 MHz GBWP Gain Bandwidth product 3.7 MHz Time Domain Response tR, tF Rise and Fall Time Vo = 1.0V step 300 ns OS Overshoot Vo = 1.0V step 5 % SR Slew Rate Vo = 3V step, G = -1 3 V/µs -80 dBc Distortion and Noise Response HD2 2nd Harmonic Distortion Vo =1Vpp, 10kHz HD3 3rd Harmonic Distortion Vo =1Vpp, 10kHz -80 dBc THD Total Harmonic Distortion Vo =1Vpp, 10kHz 0.02 % en Input Voltage Noise 25 nV/√Hz DC Performance VIO dVIO Ibn Input Offset Voltage1 -8 Average Drift Input Bias Current 1 PSRR Power Supply Rejection Ratio AOL Open Loop Gain IS DC 50 DC 1 Quiescent Current Per Amplifier 0 +8 mV 2.9 µV/°C 5 pA 73 dB 102 dB 200 300 µA Input Characteristics RIN Input Resistance 10 GΩ CIN Input Capacitance 1.2 pF CMIR Input Common Mode Voltage Range typical -0.3 to 5.3 V CMRR Common Mode Rejection Ratio1 DC, VCM = 0V to VS 73 dB RL = 10kΩ to VS/2 0.03 0.01to 4.95 4.99 V RL = 1kΩ to VS/2 0.1 to 4.9 V 58 Output Characteristics VO Output Voltage Swing1 ISC Short Circuit Output Current ±33 mA VS Power Supply Operating Range 2.5 to 5.5 V 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 Max Units 0 6 V -VS -0.5V +VS +0.5V 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 Min Operating Temperature Range (Recommended) -40 Typ Max Units +85 °C Max Units 175 °C +150 °C +300 °C Reliability Information Parameter Min Typ Junction Temperature Storage Temperature Range -65 Lead Temperature (Soldering, 10s) Thermal Resistance (θJA), 5 Lead SOT231 Thermal Resistance (θJA), 5 Lead SC701 256 °C/W 331.4 °C/W Note: 1. Package thermal resistance (θJA), JDEC standard multi-layer test boards, still air. 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) Inverting Freq. Response (Vs = +5V) Normalized Magnitude (1dB/div) Normalized Magnitude (1dB/div) Non-Inverting Freq. Resp. (Vs = +5V) G=1 Rf = 0 G=2 G = 10 G=5 Vo = 0.2Vpp 0.1 1.0 10 G = -1 G = -2 G = -10 G = -5 Vo = 0.2Vpp 0.1 1.0 Frequency (MHz) Inverting Frequency Response Normalized Magnitude (1dB/div) Normalized Magnitude (1dB/div) Non-Inverting Frequency Response G=1 Rf = 0 G=2 G = 10 G=5 Vo = 0.2Vpp 0.1 1.0 10 G = -1 G = -2 G = -10 G = -5 Vo = 0.2Vpp 0.1 1.0 Frequency (MHz) CL = 500pF Rs = 165Ω Magnitude (1dB/div) Magnitude (1dB/div) Frequency Response vs. RL CL = 50pF Rs = 0 Vo = 50mV CL = 1000pF Rs = 100Ω CL = 2000pF Rs = 65Ω CL = 100pF Rs = 0 Rs - CL 5kΩ RL = 10kΩ RL = 1kΩ RL = 200Ω RL = 50Ω RL Vo = 0.2Vpp 5kΩ 0.1 1.0 10 0.1 1.0 Frequency (MHz) Large Signal Freq. Resp. (Vs = +5V) Open Loop Gain & Phase vs. Frequency 120 Open Loop Gain (dB) Vo = 1Vpp Vo = 2Vpp -5 Vo = 4Vpp -6 -7 -8 80 60 Phase 40 0 20 -45 0 -90 -20 -9 -10 -135 -40 0.1 1.0 Frequency (MHz) 10 Open Loop Phase (Degree) Gain 100 -1 -2 -3 -4 Magnitude (1dB/div) 10 Frequency (MHz) 1 0 REV. 1D December 2004 10 Frequency (MHz) Frequency Response vs. CL + 10 Frequency (MHz) -180 1 10 100 1k 10k 100k 1M 10M Frequency (Hz) 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 2nd Harmonic Distortion vs. Vo 120 3rd; RL = 10kΩ Distortion (dBc) Distortion (dBc) -46 -48 -50 -52 -54 -56 -58 -60 -62 -64 -66 -68 -70 2nd; RL = 200kΩ 3rd; RL = 1kΩ 3rd; RL = 200kΩ 2nd; RL = 10kΩ -45 100kHz -50 50kHz -55 -60 20kHz -65 10kHz -70 -75 2nd; RL = 1kΩ -80 -85 10 20 30 40 50 60 70 80 90 100 0.5 0.75 Frequency (kHz) 3rd Harmonic Distortion vs. Vo CMRR (dB) 20kHz -65 -70 10kHz 40 30 -75 20 -80 10 0 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 10 100 Output Amplitude (Vpp) 1k 70 1.05 Output Voltage (0.15V/div) 1.35 60 50 40 30 20 10 0 0.75 0.45 0.15 RL = 200Ω -0.15 RL = 75Ω -0.45 RL = 100Ω -0.75 RL = 1kΩ -1.5 RL = 10kΩ -1.35 100 1k 10k 100k -2 Frequency (Hz) Pulse Resp. vs. Common Mode Voltage 0.6V offset no offset -0.6V offset -1.2V offset -1 -1.5 Time (0.5µs/div) -1 -0.5 0 0.5 1 1.5 2 Input Voltage Noise Input Voltage Noise (nV/√Hz) 1.2V offset -1.5 Input Voltage (0.5V/div) 1.5 G=1 100k Output Swing vs. Load 80 10 10k Frequency (Hz) PSRR Vs = 5V PSRR (dB) 2.5 50 -85 Output Voltage (0.25V/div) 2.25 60 50kHz -60 -0.5 2 70 -55 0 1.75 100kHz -50 0.5 1.5 80 -45 1 1.25 CMRR Vs = 5V 120 Distortion (dBc) 1 Output Amplitude (Vpp) 75 70 65 60 55 50 45 40 35 30 25 20 15 0.1k 1k 10k 100k 1M Frequency (Hz) 6 REV. 1D December 2004 FAN4174 DATA SHEET 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 FAN4174 will typically recover in less than 500ns from an overdrive condition. Figure 3 shows the FAN4174 amplifier in an overdriven condition. 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 In + Input Voltage (0.5V/div) + 0.01µF Out FAN4174 Rout - Rf G=5 VS = 2.7V Output Input Rg Time (1µs/div) Figure 1: Typical Non-inverting Configuration 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. Figure 3: Overdrive Recovery 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 Vo Rf + 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. REV. 1D December 2004 Rs CL RL Rg 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. 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: Figure 5: FAN4174 Evaluation Board Schematic 1. Ground the non-inverting input 2. Short the output to the inverting input Evaluation Board Information The following evaluation boards are available to aid in the testing and layout of this device: Eval Bd Description Products KEB002 Single Channel, Dual Supply, 5 and 6 lead SOT23 FAN4174AS5X KEB011 Single Channel, Dual Supply, 5 and 6 lead SC70 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) REV. 1D December 2004 Figure 6b: KEB002 (bottom side) 9 DATA SHEET FAN4174 Packaging Dimensions b CL DATUM ’A’ SOT-23 e 2 CL CL E α e1 C D CL A 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: A2 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. A1 SC70 b CL e L CL CL HE E Q1 CL 10 A2 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 C D A SYMBOL e D b E HE Q1 A2 A1 A c L NOTE: A1 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. REV. 1D December 2004 FAN4174 DATA SHEET Ordering Information Model Part Number FAN4174 FAN4174 Lead Free Package Container Pack Qty FAN4174IS5X_NL SOT23-5 Reel 3000 FAN4174IP5X_NL SC70-5 Reel 3000 Temperature range for all parts: -40°C to +85°C. DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICES TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to per form when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. www.fairchildsemi.com 2. 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. © 2004 Fairchild Semiconductor Corporation