www.fairchildsemi.com FAN4272 Dual, Low Cost, +2.7V & +5V, Rail-to-Rail I/O Amplifier Features at 2.7V Description • • • • • • • • • • • The FAN4272 is an ultra-low cost, low power, voltage feedback amplifier. At 5V, the FAN4272 uses only 160µA of supply current per amplifier and is designed to operate from a supply range of 2.5V to 5.5V (±1.25V to 2.75V). The input voltage range exceeds the negative and positive rails. 130µA supply current per amplifier 4MHz bandwidth Output swings to within 25mV of either rail Input voltage range exceeds the rail by >250mV 4V/µs slew rate 16mA output current 22nV/√Hz input voltage noise Operating temperature range: -40°C to +125°C Directly replaces TLC2272 in single supply applications Available in SOIC-8 and MSOP-8 package options Available evaluation boards: KEB006 (SOIC) and KEB010 (MSOP) The FAN4272 offers high bipolar performance at a low CMOS price. The FAN4272 offers superior dynamic performance with a 4MHz small signal bandwidth and 4V/µs slew rate. The combination of low power, high bandwidth, and rail-torail performance make the FAN4272 well suited for batterypowered communication/computing systems. Large Signal Freq. Response Vs = +5V Applications Automotive 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 Vo = 1Vpp Magnitude (1dB/div) • • • • • • • • • • +In1 3 -Vs 4 + + +Vs 7 Out2 6 -In2 5 +In2 1 -In1 2 +In1 3 -Vs 4 RL = 1kΩ 1.5 1.0 RL = 75Ω 0.5 RL = 200Ω RL = 100Ω 0 -0.5 -1.0 -1.5 -2.0 -3 + RL = 10kΩ 2.0 -2.5 MSOP Out1 10 Output Swing vs. Load Vs = +5V Output Voltage (0.25V/div) 8 1 2 1 Frequency (MHz) 2.5 SOIC -In1 Vo = 2Vpp 0.1 FAN4272 Packages Out1 Vo = 4Vpp + 8 +Vs 7 Out2 6 -In2 5 +In2 -2 -1 0 1 2 3 Input Voltage (V) Rev. 2 December 2002 DATA SHEET FAN4272 Absolute Maximum Ratings Parameter Supply Voltages Maximum Junction Temperature Storage Temperature Range Lead Temperature, 10 seconds Operating Temperature Range, recommended Input Voltage Range Min. 0 – -65 – -40 -Vs -0.5 Max. +6 +175 +150 +260 +125 +Vs +0.5 Unit V °C °C °C °C V Max. Unit Electrical Specifications (Vs = +2.7V, G = 2, RL = 10kΩ to Vs/2, Rf = 5kΩ, Ta = 25°C; unless otherwise noted) Parameter AC Performance -3dB Bandwidth1 Large Signal Bandwidth Gain Bandwidth Product Rise and Fall Time Overshoot Slew Rate 2nd Harmonic Distortion 3rd Harmonic Distortion THD Input Voltage Noise Crosstalk DC Performance Input Offset Voltage Average Drift Input Bias Current Average Drift Power Supply Rejection Ratio2 Open Loop Gain Quiescent Current Per Channel Input Characteristics Input Resistance Input Capacitance Input Common Mode Voltage Range Common Mode Rejection Ratio Output Characteristics Output Voltage Swing Conditions Min. G = +1, Vo = 0.02Vpp G = +2, Vo = 0.2Vpp G = +2, Vo = 2Vpp 4 3.7 1.1 1.7 215 <1 4 -74 -62 0.08 22 95 MHz MHz MHz MHz ns % V/µs dBc dBc % nV/√Hz dB <0.5 4 90 100 85 75 130 mV µV/°C nA pA/°C dB dB µA 12 1.8 -0.25 to 2.95 78 MΩ pF V dB 0.06 to 2.64 0.025 to 2.68 0.07 to 2.645 0.198 to 2.59 ±16 2.5 2.7 V V V mA V 1V step 1V step 1V step 1Vpp, 10kHz 1Vpp, 10kHz 1Vpp, 10kHz >10kHz >100kHz DC RL = 10kΩ DC, Vcm = 0V to Vs RL = 10kΩ to Vs/22 RL = 1kΩ to Vs/2 RL = 200Ω to Vs/2 Output Current Power Supply Operating Range Typ. 70 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. Guaranteed by testing or statistical analysis at 25°C. 2 Rev. 2 December 2002 FAN4272 DATA SHEET Electrical Specifications (Vs = +5V, G = 2, RL = 10kΩ to Vs/2, Rf = 5kΩ, Ta = 25°C; unless otherwise noted) Parameter AC Performance -3dB Bandwidth1 Large Signal Bandwidth Gain Bandwidth Product Rise and Fall Time Overshoot Slew Rate 2nd Harmonic Distortion 3rd Harmonic Distortion THD Input Voltage Noise Crosstalk DC Performance Input Offset Voltage2 Average Drift Input Bias Current2 Average Drift Input Offset Current2 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 Swing Conditions Min. G = +1, Vo = 0.02Vpp G = +2, Vo = 0.2Vpp G = +2, Vo = 2Vpp -2 -420 DC, Vcm = 0V to Vs RL = 10kΩ to Vs/22 RL = 1kΩ to Vs/2 RL = 200Ω to Vs/2 Output Current Power Supply Operating Range Max. 4 4.7 1.7 1.8 150 <1 6 -73 -75 0.03 23 95 1V step 1V step 1V step 2Vpp, 10kHz 2Vpp, 10kHz 2Vpp, 10kHz >10kHz >100kHz DC RL = 10kΩ Typ. -50 70 <0.5 8 90 100 MHz MHz MHz MHz ns % V/µs dBc dBc % nV/√Hz dB +2 420 +50 85 72 160 Unit 235 mV µV/°C nA pA/° nA dB dB µA 12 1.7 -0.25 to 5.25 85 MΩ pF V dB 0.09 to 4.91 0.031 to 4.976 0.094 to 4.94 0.315 to 4.865 ±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. Guaranteed by testing or statistical analysis at 25°C. 3. RL = 10kΩ to Vs/2. Package Thermal Resistance Package 8 lead SOIC 8 lead MSOP Rev. 2 December 2002 θJA 152°C/W 206°C/W 3 DATA SHEET FAN4272 Typical Operating Characteristics (Vs = +5V, G = 2, RL = 10kΩ to Vs/2, Rf = 5kΩ, Ta = 25°C; unless otherwise noted) Inverting Freq. 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 Normalized Magnitude (1dB/div) Normalized Magnitude (1dB/div) G=1 Rf = 0 G=2 Rf = 5kΩ G=5 Rf = 5kΩ 0.01 0.1 1 Vo = 0.2Vpp G = -2 Rf = 5kΩ G = -5 Rf = 5kΩ 0.01 10 0.1 1 Frequency Response vs. RL Vs = +5V CL = 200pf RL = 10kΩ RL = 100kΩ Magnitude (3dB/div) CL = 100pf CL = 50pf CL = 20pf CL = 10pf + Rs - CL 5kΩ 10 Frequency (MHz) Frequency Response vs. CL Vs = +5V Magnitude (1dB/div) G = -1 Rf = 5kΩ G = -10 Rf = 5kΩ Frequency (MHz) Rs = 0 10 Inverting Freq. Response Vs = +2.7V Non-Inverting Freq. Response Vs = +2.7V G = 10 Rf = 5kΩ 1 Frequency (MHz) Frequency (MHz) Vo = 0.2Vpp G = -1 Rf = 5kΩ RL RL = 2kΩ RL = 1kΩ 5kΩ 0.01 0.1 1 0.01 10 0.1 Frequency (MHz) 1 10 Frequency (MHz) Open Loop Gain & Phase vs. Frequency Large Signal Freq. Response Vs = +5V 140 Open Loop Gain (dB) Magnitude (1dB/div) Vo = 4Vpp Vo = 2Vpp |Gain| No Load 100 80 Phase No Load 60 0 -45 40 -90 20 Phase RL = 10kΩ 0 -135 -20 0.1 1 Frequency (MHz) 4 10 1 10 100 1k 10k 100k 1M Open Loop Phase (deg) |Gain| RL = 10kΩ 120 Vo = 1Vpp -180 10M 100M Frequency (Hz) Rev. 2 December 2002 FAN4272 DATA SHEET Typical Operating Characteristics (Vs = +5V, G = 2, RL = 10kΩ to Vs/2, Rf = 5kΩ, Ta = 25°C; unless otherwise noted) 2nd Harmonic Distortion vs. Vo for Vs = +5V Harmonic Distortion vs. Freq. Vs = +5V -40 -45 -55 -60 -65 2nd RL = 10kΩ -70 -45 3rd RL = 1kΩ -50 Distortion (dBc) Distortion (dBc) 2nd RL = 1kΩ Vo = 1Vpp -50 -75 -55 100kHz -60 50kHz -65 20kHz -70 -75 3rd RL = 10kΩ -80 10kHz -80 -85 -85 10 20 30 40 50 60 70 80 90 0.5 100 1 3rd Harmonic Distortion vs. Vo for Vs = +5V 100kHz -10 -50 -20 -55 50kHz -65 20kHz -70 10kHz -75 -30 -40 -50 -60 -70 -80 -80 -85 -90 0.5 1 1.5 2 100 2.5 1000 Output Amplitude (Vpp) 10000 100000 1000000 Frequency (Hz) PSRR vs. Frequency Output Swing vs. Load Vs = +5V 2.5 -10 2.0 Output Voltage (0.25V/div) 0 -20 PSRR (dB) 2.5 CMRR vs. Frequency -45 -60 2 0 CMRR (dB) Distortion (dBc) -40 1.5 Output Amplitude (Vpp) Frequency (kHz) -30 -40 -50 -60 -70 -80 -90 RL = 10kΩ RL = 1kΩ 1.5 1.0 RL = 75Ω 0.5 RL = 200Ω RL = 100Ω 0 -0.5 -1.0 -1.5 -2.0 -2.5 100 1000 10000 100000 -3 1000000 Frequency (Hz) -2 -1 0 1 2 3 Input Voltage (V) Pulse Resp. vs. Common Mode Voltage Input Voltage Noise Vs = +5V 45 42 No Offset -1.2V Offset 39 36 nV/√Hz Output Voltage (0.5V/div) 2.4V Offset 1.2V Offset 33 30 27 -2.4V Offset 24 21 18 Time (1µS/div)) 0.1 1 10 100 Frequency (kHz) Rev. 2 December 2002 5 DATA SHEET FAN4272 Typical Operating Characteristics (Vs = +5V, G = 2, RL = 10kΩ to Vs/2, Rf = 5kΩ, Ta = 25°C; unless otherwise noted) Input Offset Voltage vs. Temp for 100 Parts Input Offset Voltage vs. Vs for 20 Parts 2.0 1.8 1.5 1.2 1.0 0.8 0.4 0.5 mV Input Offset Voltage (mV) 2.0 0 -0.5 -0.8 -1.0 -1.2 -1.5 -1.8 -2.0 -2.0 2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.5 Supply Voltage (V) 6 0 -0.4 -40 -25 -10 5 20 35 50 65 80 95 110 125 Temperature (deg) Rev. 2 December 2002 FAN4272 DATA SHEET Application Information degradation will occur. It the maximum junction temperature exceeds 175°C for an extended time, device failure may occur. General Description The FAN4272 is single supply, general purpose, voltage-feedback amplifier. The FAN4272 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. 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 FAN4272 will typically recover in less than 50ns from an overdrive condition. Figure 3 shows the FAN4272 in an overdriven condition. +Vs 6.8µF 5.5 G=5 + Output In 0.01µF + Out FAN4272 - AMPL (V) 4.5 3.5 2.5 1.5 Input 0.5 Rf -0.5 0 Rg 10 20 30 40 50 60 70 80 Time (µs) Figure 3: Overdrive Recovery 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. Driving Capacitive Loads The Frequency Response vs. CL plot, illustrates the response of the FAN4272. 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 200pF require the use of Rs. + Rs Rf FAN4272 Vin Vo CL RL Rg + 10kΩ Figure 4: Typical Topology for driving a capacitive load 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 Rev. 2 December 2002 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 FAN4272 requires a 75Ω series resistor to drive a 100pF load. 7 DATA SHEET FAN4272 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 Description Products KEB006 Dual Channel, Dual Supply, 8 lead SOIC FAN4272AM8 KEB010 Dual Channel, Dual Supply, 8 lead MSOP FAN4272AMU8 Figure 5: Evaluation Board Schematic Evaluation board schematics and layouts are shown in Figure 5 and Figure 6. 8 Rev. 2 December 2002 FAN4272 DATA SHEET FAN4272 Evaluation Board Layout Figure 6a: KEB006 (top side) Figure 6b: KEB006 (bottom side) Figure 6c: KEB010 (top side) Figure 6d: KEB010 (bottom side) Rev. 2 December 2002 9 DATA SHEET FAN4272 FAN4272 Package Dimensions SOIC-8 D SOIC SYMBOL A1 B C D E e H h L A 7° e ZD CL CL Pin No. 1 E H B ZD A2 DETAIL-A L NOTE: h x 45° A A1 DETAIL-A 1. All dimensions are in millimeters. 2. Lead coplanarity should be 0 to 0.10mm (.004") max. 3. Package surface finishing: (2.1) Top: matte (charmilles #18~30). (2.2) All sides: matte (charmilles #18~30). (2.3) Bottom: smooth or matte (charmilles #18~30). 4. All dimensions excluding mold flashes and end flash from the package body shall not exceed o.152mm (.006) per side(d). α A2 C e MSOP 02 S MSOP-8 t1 R1 t2 E/2 2X –H– R Gauge Plane E1 3 7 0.25mm –B– L1 b ccc A B C 2 01 L 03 2 E3 E4 1 c Detail A Scale 40:1 c1 2 4 6 –C– D2 A2 A1 A Detail A E1 E D 3 E2 A –A– b bbb M A B C b1 Section A - A 5 A aaa A 4 NOTE: 1 All dimensions are in millimeters (angle in degrees), unless otherwise specified. 10 MIN MAX 0.10 0.25 0.36 0.46 0.19 0.25 4.80 4.98 3.81 3.99 1.27 BSC 5.80 6.20 0.25 0.50 0.41 1.27 1.52 1.72 8 0 0.53 ref 1.37 1.57 2 Datums – B – and – C – to be determined at datum plane – H – . 3 Dimensions "D" and "E1" are to be determined at datum – H – . 4 Dimensions "D2" and "E2" are for top package and dimensions "D" and "E1" are for bottom package. 5 Cross sections A – A to be determined at 0.13 to 0.25mm from the leadtip. 6 Dimension "D" and "D2" does not include mold flash, protrusion or gate burrs. 7 Dimension "E1" and "E2" does not include interlead flash or protrusion. SYMBOL MIN A 1.10 A1 0.10 A2 0.86 D 3.00 D2 2.95 E 4.90 E1 3.00 E2 2.95 E3 0.51 E4 0.51 R 0.15 R1 0.15 t1 0.31 t2 0.41 b 0.33 b1 0.30 c 0.18 c1 0.15 01 3.0° 02 12.0° 03 12.0° L 0.55 L1 0.95 BSC aaa 0.10 bbb 0.08 ccc 0.25 e 0.65 BSC S 0.525 BSC MAX – ±0.05 ±0.08 ±0.10 ±0.10 ±0.15 ±0.10 ±0.10 ±0.13 ±0.13 +0.15/-0.06 +0.15/-0.06 ±0.08 ±0.08 +0.07/-0.08 ±0.05 ±0.05 +0.03/-0.02 ±3.0° ±3.0° ±3.0° ±0.15 – – – – – – Rev. 2 December 2002 DATA SHEET FAN4272 Ordering Information Model Part Number Package Container Pack Qty FAN4272 FAN4272AM8X SOIC-8 Reel 2500 FAN4272 FAN4272AMU8X MSOP-8 Reel 3000 Temperature range for all parts: -40°C to +125°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 perform 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. © 2002 Fairchild Semiconductor Corporation