FAN4852 9MHz Low-Power Dual CMOS Amplifier Features Description The FAN4852 is a dual, rail-to-rail output, low-power, CMOS amplifier that consumes only 800µA of supply current, while providing ±50mA of output short-circuit current. This amplifier is designed to operate supplies from 2.5V to 5V. 0.8mA Supply Current 9 MHz Bandwidth Output Swing to within 10mV of Either Rail Input Voltage Range Exceeds the Rails 6V/µs Slew Rate 11nV/Hz Input Voltage Noise Fully Specified at +3.3V and +5V Supplies The FAN4852 is designed on a CMOS process and provides 9MHz of bandwidth and 6V/μs of slew rate. The combination of low-power, low-voltage operation and a small package make this amplifier well suited for general-purpose and battery-powered applications. Applications Additionally, the FAN4852 is EMI hardened, which minimizes EMI interference. It has a maximum input offset voltage of 1mV and an input common-mode range that includes ground. Piezoelectric Sensors PCMCIA, USB Mobile Communications / Battery-Powered Devices Notebooks and PDAs Active Filters Signal Conditioning Portable Test Instruments Ordering Information Part Number Operating Temperature Range FAN4852IMU8X © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 -40 to +85°C Package 8-Lead MSOP Package Packing Method 3000 on Tape and Reel www.fairchildsemi.com FAN4852 — 9MHz Low-Power Dual CMOS Amplifier June 2011 Figure 1. Pin Assignments Pin Definitions Pin # Name Description 1 OUT1 Output, Channel 1 2 -IN1 Negative Input, Channel 1 3 +IN1 Positive Input, Channel 1 4 -Vs 5 +IN2 Positive Input, Channel 2 6 -IN2 Negative Input, Channel 2 7 OUT2 8 +Vs Negative Supply FAN4852 — 9MHz Low-Power Dual CMOS Amplifier Pin Configuration Output, Channel 2 Positive Supply © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 www.fairchildsemi.com 2 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Functional operation under any of these conditions is NOT implied. Performance and reliability are guaranteed only if operating conditions are not exceeded. Symbol VCC Parameter Input Voltage Range TJ Junction Temperature TSTG Storage Temperature JA Max. Unit 0 6 V -VS-0.5 +VS+0.5 V +150 °C +150 °C +260 °C 206 °C/W Supply Voltage VIN TL Min. -65 Lead Soldering, 10 Seconds Thermal Resistance (1) Note: 1. Package thermal resistance JEDEC standard, multi-layer test boards, still air. ESD Information Symbol ESD Parameter Min. Typ. Human Body Model, JESD22-A114 8 Charged Device Model, JESD22-C101 2 Max. FAN4852 — 9MHz Low-Power Dual CMOS Amplifier Absolute Maximum Ratings Unit kV Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol Parameter Min. TA Operating Temperature Range -40 Vs Supply Voltage Range 2.5 © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 Typ. 3.3 Max. Unit +85 °C 5.0 V www.fairchildsemi.com 3 +VS=+3.3V, -Vs = 0V, VCM = +Vs/2, and RL = 10KΩ to +Vs/2, unless otherwise noted. Symbol IS ISC EMIRR Parameter Supply Current(2) Short-Circuit Output Current(2) EMI Rejection Ratio, +IN and -IN(4) PSRR Power Supply Rejection Ratio(2) CMRR Common Mode Rejection Ratio(2) CMIR Input Common Mode Voltage Range(2) VOS Input Offset Voltage(2) dVIO Average Drift(3) IOS Condition Min. TA=25˚C Typ. 0.8 Full Temperature Range 25 Sourcing VO=VCM, VIN=100mV, Full Temperature Range 20 Sinking VO=VCM, VIN=-100mV, TA=25˚C 28 Sinking VO=VCM, VIN=-100mV, Full Temperature Range 20 Unit mA 50 mA 46 VRFpeak=100mVp, (-20dBVp) f=400MHz 75 VRFpeak=100mVp, (-20dBVp) f=900MHz 78 VRFpeak=100mVp, (-20dBVp) f=1800MHz 87 2.7V≤V+≤3.3V, VO=1V, TA=25˚C 75 2.7V≤V+≤3.3V, VO=1V, Full Temperature Range 74 -0.2V<VCM <V+-1.2V, TA=25˚C 76 -0.2V<VCM <V+-1.2V, Full Temperature Range 75 CMRR≥76dB -0.2 dB 95 dB 117 dB 2.1 ±0.3 Full Temperature Range ±1.0 ±1.2 ±0.4 Input Offset Current 1.0 1.1 Sourcing VO=VCM, VIN=100mV, TA=25˚C TA=25˚C Max. FAN4852 — 9MHz Low-Power Dual CMOS Amplifier Electrical Specifications at +3.3V ±2.0 1 V mV µV/°C pA TA= Ibn_Char Input Bias Current(3) en Input-Referred Voltage Noise iN Input-Referred Current Noise TA=25˚C 0.1 Full Temperature Range 10.0 500 f=1kHz 11 f=10kHz 10 f=1kHz 0.005 pA nV/Hz pA/Hz Continued on the following page… © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 www.fairchildsemi.com 4 +VS=+3.3V, -Vs = 0V, VCM = +Vs/2, and RL = 10KΩ to +Vs/2, unless otherwise noted. Symbol Parameter Condition Min. RL=2k to V+/2, TA=25˚C Output Voltage Swing High(2) VO = (+VS) - VOUT Typ. Max. 21 35 RL=2k to V+/2, Full Temperature Range 43 4 RL=10k to V+/2, TA=25˚C RL=10k to V+/2, Full Temperature Range VO 20 RL=2k to V+/2, Full Temperature Range AVOL 3 RL=10k to V+/2, TA=25˚C ROUT Closed-Loop Impedance RIN Input Resistance 9 RL=2kΩ, VO=0.15 to 1.65V, VO=3.15 to 1.65V, TA=25˚C 100 RL=2kΩ, VO=0.15 to 1.65V, VO=3.15 to 1.65V, Full Temperature Range 97 RL=10kΩ, VO=0.1 to 1.65V, VO=3.2 to 1.65V, TA=25˚C 100 RL=10kΩ, VO=0.1 to 1.65V, VO=3.2 to 1.65V, Full Temperature Range 97 11 mV MHz 114 dB 115 f=6MHz 6 Ω 10 G Common Mode 11 Differential Mode 6 CIN Input Capacitance ΦM Phase Margin SR Slew Rate Av=+1, VO=1Vpp 10%-90% Total Harmonic Distortion + Noise f=1kHz, Av=1, BW=>500kHz THD+N 32 14 Gain Bandwidth Product Large Signal Voltage Gain(3) mV 43 RL=10k to V+/2, Full Temperature Range GBW 10 12 RL=2k to V+/2, TA=25˚C Output Voltage Swing Low(2) VO = VOUT + (-VS) Unit FAN4852 — 9MHz Low-Power Dual CMOS Amplifier Electrical Specifications at +3.3V pF 86 ˚ 6.1 V/µs 0.006 % Notes: 2. 100% tested at TA=25°C. 3. Guaranteed by characterization. 4. EMI rejection ratio is defined as EMIRR – 20log (VRFpeak / ΔVOS). © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 www.fairchildsemi.com 5 +VS=+5V, -VS = 0V, VCM = +VS/2, and RL = 10KΩ to +VS/2, unless otherwise noted. Symbol IS ISC EMIRR Parameter Supply Current(5) Short-Circuit Output Current(5) EMI Rejection Ratio, +IN and -IN(7) Condition Min. TA=25˚C 0.9 Full Temperature Range Sourcing VO=VCM, VIN=100mV, TA=25˚C 60 Sourcing VO=VCM, VIN=100mV, Full Temperature Range 48 Sinking VO=VCM, VIN=-100mV, TA=25˚C 58 Sinking VO=VCM, VIN=-100mV, Full Temperature Range 44 VRFpeak=100mVp, (-20dBVp) f=900MHz 78 VRFpeak=100mVp, (-20dBVp) f=1800MHz 87 75 2.7V≤V+≤5.5V, Vo=1V, Full Temperature Range 74 CMRR Common Mode Rejection Ratio(5) -0.2V≤VCM≤V+-1.2V 77 CMIR Input Common Mode Voltage Range(5) CMRR≥77dB Average Drift(6) IOS 90 75 2.7V≤V+≤5.5V, Vo=1V, TA=25˚C dVIO dB 105 dB 122 -0.2 dB 3.8 ±0.3 Full Temperature Range ±1.0 ±1.2 ±0.4 Input Offset Current mA 90 VRFpeak=100mVp, (-20dBVp) f=400MHz TA=25˚C 1.1 Unit mA Power Supply Rejection Ratio(5) Input Offset Voltage(5) Max. 1.2 PSRR VOS Typ. FAN4852 — 9MHz Low-Power Dual CMOS Amplifier Electrical Specifications at +5V ±2.0 1 V mV µV/°C pA TA= Ibn_Char Input Bias Current(6) en Input-Referred Voltage Noise iN Input-Referred Current Noise TA=25˚C 0.1 Full Temperature Range 10.0 500 pA f=1kHz 11 nV/Hz f=10kHz 10 nV/Hz f=1kHz 0.005 pA/Hz Continued on the following page… © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 www.fairchildsemi.com 6 +VS=+5V, -VS = 0V, VCM = +VS/2, and RL = 10KΩ to +VS/2, unless otherwise noted. Symbol Parameter Condition Min. RL=2k to V+/2, TA=25˚C Output Voltage Swing High(5) Typ. Max. 25 39 RL=2k to V+/2, Full Temperature Range 47 4 RL=10k to V+/2, TA=25˚C RL=10k to V+/2, Full Temperature Range VO Output Voltage Swing Low 24 RL=2k to V+/2, Full Temperature Range AVOL 3 RL=10k to V+/2, TA=25˚C ROUT RIN Closed-Loop Impedance 9 RL=2kΩ, VO=0.15 to 2.5V, VO=4.85 to 2.5V, TA=25˚C 105 RL=2kΩ, VO=0.15 to 2.5V, VO=4.85 to 2.5V, Full Temperature Range 102 RL=10kΩ, VO=0.1 to 2.5V, VO=4.9 to 2.5V, TA=25˚C 105 RL=10kΩ, VO=0.1 to 2.5V, VO=4.9 to 2.5V, Full Temperature Range 102 15 mV MHz 118 dB 120 f=6MHz 6 Ω 10 G Common Mode 11 Differential Mode 6 Input Resistance CIN Input Capacitance ΦM Phase Margin SR Slew Rate Av=+1, VO=1Vpp 10%-90% Total Harmonic Distortion + Noise f=1kHz, Av=1, BW=>500kHz THD+N 38 1 Gain Bandwidth Product Large Signal Voltage Gain(6) mV 50 RL=10k to V+/2, Full Temperature Range GBW 11 13 RL=2k to V+/2, TA=25˚C (5) Unit FAN4852 — 9MHz Low-Power Dual CMOS Amplifier Electrical Specifications at +5V pF 94 ˚ 6.2 V/µs 0.006 % Notes: 5. 100% tested at TA=25°C. 6. Guaranteed by characterization. 7. EMI rejection ratio is defined as EMIRR – 20log (VRFpeak / ΔVOS). © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 www.fairchildsemi.com 7 +VS=+3.3V, -VS = 0V, VCM = +VS/2, and RL = 10KΩ to +VS/2, unless otherwise noted. Figure 2. Supply Current vs. Supply Voltage Figure 3. Sink Current vs. Supply Voltage Figure 4. Source Current vs. Supply Voltage Figure 5. Input Bias Current vs. VCM (3.3V) FAN4852 — 9MHz Low-Power Dual CMOS Amplifier Typical Performance Characteristics Figure 6. Input Bias Current vs. VCM (5.0V) © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 www.fairchildsemi.com 8 +VS=+3.3V, -VS = 0V, VCM = +VS/2, and RL = 10KΩ to +VS/2, unless otherwise noted. Figure 7. Output Swing High vs. Supply Voltage Figure 8. Output Swing Low vs. Supply Voltage Figure 9. Output Swing High vs. Supply Voltage Figure 10. Output Swing Low vs. Supply Voltage Figure 11. Output Voltage Swing vs. Load Current at 5.0V Figure 12. Output Voltage Swing vs. Load Current at 3.3V © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 FAN4852 — 9MHz Low-Power Dual CMOS Amplifier Typical Performance Characteristics www.fairchildsemi.com 9 +VS=+3.3V, -VS = 0V, VCM = +VS/2, and RL = 10KΩ to +VS/2, unless otherwise noted. Figure 13. Open-Loop Gain/Phase vs. Temperature Figure 14. Open-Loop Gain/Phase vs. Load Figure 15. Phase Margin vs. Capacitive Load Figure 16. PSRR vs. Frequency Figure 17. CMRR vs. Frequency Figure 18. EMIRR vs. Power at 400MHz © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 FAN4852 — 9MHz Low-Power Dual CMOS Amplifier Typical Performance Characteristics www.fairchildsemi.com 10 +VS=+3.3V, -VS = 0V, VCM = +VS/2, and RL = 10KΩ to +VS/2, unless otherwise noted. Figure 19. EMIRR vs. Power at 900MHz Figure 20. EMIRR vs. Power at 1800MHz Figure 21. EMIRR vs. Frequency at 5.0V Figure 22. THD+N vs. Frequency Figure 23. Large Signal Step Response Figure 24. Small Signal Step Response © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 FAN4852 — 9MHz Low-Power Dual CMOS Amplifier Typical Performance Characteristics www.fairchildsemi.com 11 +VS=+3.3V, -VS = 0V, VCM = +VS/2, and RL = 10KΩ to +VS/2, unless otherwise noted. Figure 25. Small Signal Step Response Figure 26. Slew Rate vs. Supply Voltage Figure 27. VOS vs. Supply Voltage Figure 28. VOS vs. Temperature © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 FAN4852 — 9MHz Low-Power Dual CMOS Amplifier Typical Performance Characteristics www.fairchildsemi.com 12 General Description Overdrive Recovery The FAN4852 amplifier includes single-supply, generalpurpose amplifiers, fabricated on a CMOS process. The input and output are rail-to-rail and the part is unity gain stable. The typical non-inverting circuit schematic is shown in Figure 29. 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 range is exceeded. The FAN4852 typically recovers in less than 500ns from an overdrive condition. Figure 31 shows the FAN4852 amplifier in an overdriven condition. Figure 29. Typical Non-Inverting Configuration Figure 31. Overdrive Recovery Input Common Mode Voltage Driving Capacitive Loads The common mode input range includes ground. CMRR does not degrade when input levels are kept 1.2V below the rail. For the best CMRR when using a VS of 5V, the maximum input voltage should 3.8V. Figure 31 illustrates the response of the amplifier. A small series resistance (RS) at the output, illustrated in Figure 32, improves stability and settling performance. RS values provided 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. FAN4852 — 9MHz Low-Power Dual CMOS Amplifier Application Information Figure 30. 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, performance degradation occurs. If the maximum junction temperature exceeds 150°C for an extended time, device failure may occur. © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 Figure 32. 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 amplifier requires a 300series resistor to drive a 100pF load. www.fairchildsemi.com 13 General layout and supply bypassing play major roles in high-frequency performance. Fairchild evaluation boards help guide high-frequency layout and 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. 2. Place the 6.8μF capacitor within 0.75 inches of the power pin. FAN4852-010 Description Single Channel, Dual Supply +IN 1 V+ SMA R4 0.0 - IN 1 R2 0.0 8 1. Evaluation Board 3 + 1 2 - 4. Place the 0.01μF capacitor within 0.1 inches of the power pin. R5 50 Minimize all inductances. trace lengths to reduce 2. Short the output to the inverting input. © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 C9 1uF C10 0.1uF V+ GND V- V+IN 2 C11 1uF V+ C12 0.1uF SMA series R10 0.0 - IN 2 R8 0.0 5 + 7 6 4 SMA R11 50 When evaluating only one channel, complete the following on the unused channel: Ground the non-inverting input. V- V+ Refer to the evaluation board layouts shown in Figure 33 for more information. 1. R3 10K R1 10K Remove the ground plane under and around the part, especially near the input and output pins, to reduce parasitic capacitance. SMA 8 3. OUT 1 R-C4 10K 4 SMA R6 0.0 R12 0.0 R-C8 10K OUT 2 SMA R9 10K R7 10K V- Figure 33. Evaluation Board Schematic PWRCON FAN4852 — 9MHz Low-Power Dual CMOS Amplifier Layout Considerations www.fairchildsemi.com 14 FAN4852 — 9MHz Low-Power Dual CMOS Amplifier Physical Dimensions Figure 34. 8-Lead, Molded Small-Outline Package (MSOP) Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 www.fairchildsemi.com 15 FAN4852 — 9MHz Low-Power Dual CMOS Amplifier © 2010 Fairchild Semiconductor Corporation FAN4852 • Rev. 4.0.0 www.fairchildsemi.com 16