19-2813; Rev 1; 11/03 3V/5V, 6dB Video Buffer with Sync-Tip Clamp and 150nA Shutdown Current Features Single-Supply Operation from 2.7V to 5.5V Input Sync-Tip Clamp DC-Coupled Output Low-Power Shutdown Mode Reduces Supply Current to 150nA Available in Space-Saving SOT23 and SC70 Packages Applications Ordering Information Portable Video/Game Systems/DVD Players Digital Camcorders/Televisions/Still Cameras PART TEMP RANGE PINPACKAGE TOP MARK PDAs MAX4090EXT-T -40C to +85C 6 SC70-6 ABM Video-Enabled Cell Phones MAX4090EUT-T -40C to +85C 6 SOT23-6 ABOX Notebook Computers Portable/Flat-Panel Displays Block Diagram Pin Configuration TOP VIEW TOP VIEW OUT 1 GND 2 MAX4090 6 FB 5 SHDN 4 VCC VCC MAX4090 IN OUT IN 3 2.3k CLAMP FB SC70/SOT23 580 780 1.2k SHDN GND ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. 1 MAX4090 General Description The MAX4090 3V/5V, 6dB video buffer with sync-tip clamp, and low-power shutdown mode is available in tiny SOT23 and SC70 packages. The MAX4090 is designed to drive DC-coupled, 150 back-terminated video loads in portable video applications such as digital still cams, portable DVD players, digital camcorders, PDAs, video-enabled cell phones, portable game systems, and notebook computers. The input clamp positions the video waveform at the output and allows the MAX4090 to be used as a DC-coupled output driver. The MAX4090 operates from a single 2.7V to 5.5V supply and consumes only 6.5mA of supply current. The low-power shutdown mode reduces the supply current to 150nA, making the MAX4090 ideal for low-voltage, battery-powered video applications. The MAX4090 is available in tiny 6-pin SOT23 and SC70 packages and is specified over the extended -40C to +85C temperature range. MAX4090 3V/5V, 6dB Video Buffer with Sync-Tip Clamp and 150nA Shutdown Current ABSOLUTE MAXIMUM RATINGS VCC to GND ............................................................. -0.3V to +6V OUT, FB, SHDN to GND............................ -0.3V to (VCC + 0.3V) IN to GND (Note 1) ................................... VCLP to (VCC + 0.3V) IN Short-Circuit Duration from -0.3V to VCLP ........................1min Output Short-Circuit Duration to VCC or GND .......... Continuous Continuous Power Dissipation (TA = +70C) 6-Pin SOT23 (derate 8.7mW/C above +70C) ...........695mW 6-Pin SC70 (derate 3.1mW/C above +70C) .............245mW Operating Temperature Range ..........................-40C to +85C Junction Temperature .....................................................+150C Storage Temperature Range ............................-65C to +150C Lead Temperature (soldering, 10s) ................................+300C Note 1: VCLP is the input clamp voltage as defined in the DC Electrical Characteristics table. Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (VCC = 3.0V, GND = 0V, CIN = 0.1F from IN to GND, RL = infinity to GND, FB shorted to OUT, SHDN = 3.0V, TA = -40C to +85C. Typical values are at TA = +25C, unless otherwise noted.) (Note 2) PARAMETER Supply Voltage Range SYMBOL VCC CONDITIONS Guaranteed by PSRR MIN 2.7 6.5 10 ISHDN SHDN = 0V Input Clamp Voltage VCLP Input referred 0.27 Input Voltage Range VIN Inferred from voltage gain (Note 3) VCLP Power-Supply Rejection Ratio VIN = 1.45V PSRR RL = 150, 0.5V < VIN < 1.45V (Note 4) 2.7V < VCC < 5.5V Output Voltage High Swing VOH RL = 150 to GND Output Voltage Low Swing VOL RL = 150 to GND Output Current IOUT Output Short-Circuit Current ISC SHDN Logic-Low Threshold VIL SHDN Logic-High Threshold VIH SHDN Input Current IIH Shutdown Output Impedance 2 ROUT (Disabled) 0.15 1 A 0.47 V 1.45 V 35 3 1.9 2 60 80 VCC = 3V 2.55 2.7 VCC = 5V 4.3 4.6 VCLP Sourcing, RL = 20 to GND 45 85 Sinking, RL = 20 to VCC 40 85 OUT shorted to VCC or GND A M 2.1 V/V dB V 0.47 V mA 110 mA VCC x 0.3 VCC x 0.7 V V 0.003 SHDN = 0V mA 0.38 22.5 VCLP + 0.5V < VIN < VCLP + 1V AV V VCC = 5V Shutdown Supply Current Voltage Gain 5.5 10 VIN = VCLP IBIAS UNITS 6.5 ICC Input Resistance MAX VCC = 3V Quiescent Supply Current Input Bias Current TYP At DC 4 At 3.58MHz or 4.43MHz 2 _______________________________________________________________________________________ 1 A k 3V/5V, 6dB Video Buffer with Sync-Tip Clamp and 150nA Shutdown Current (VCC = 3.0V, GND = 0V, FB shorted to OUT, CIN = 0.1F, RIN = 75 to GND, RL = 150 to GND, SHDN = VCC, TA = +25C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Small-Signal -3dB Bandwidth BWSS VOUT = 100mVP-P 55 MHz Large-Signal -3dB Bandwidth BWLS VOUT = 2VP-P 45 MHz 25 MHz Small-Signal 0.1dB Gain Flatness BW0.1dBSS VOUT = 100mVP-P Large-Signal 0.1dB Gain Flatness BW0.1dBLS VOUT = 2VP-P 17 MHz Slew Rate SR VOUT = 2V step 275 V/s Settling Time to 0.1% tS VOUT = 2V step 25 ns 50 dB 2.5 Power-Supply Rejection Ratio PSRR f = 100kHz Output Impedance ZOUT f = 5MHz Differential Gain DG NTSC Differential Phase DP NTSC VCC = 3V 1 VCC = 5V 0.5 VCC = 3V 0.8 VCC = 5V 0.5 Group Delay D/dT f = 3.58MHz or 4.43MHz 20 Peak Signal to RMS Noise SNR VIN = 1VP-P, 10MHz BW 65 CIN = 0.1F (Note 4) 2 Droop % Degrees ns dB 3 % SHDN Enable Time tON VIN = VCLP + 1V, SHDN = 3V, VOUT settled to within 1% of the final voltage 250 ns SHDN Disable Time tOFF VIN = VCLP + 1V, SHDN = 0V, VOUT settled to below 1% of the output voltage 50 ns Note 2: All devices are 100% production tested at TA = +25C. Specifications over temperature limits are guaranteed by design. Note 3: Voltage gain (AV) is referenced to the clamp voltage, i.e., an input voltage of VIN = VCLP + VI would produce an output voltage of VOUT = VCLP + AV x VI. Note 4: Droop is guaranteed by the Input Bias Current specification. _______________________________________________________________________________________ 3 MAX4090 AC ELECTRICAL CHARACTERISTICS Typical Operating Characteristics (VCC = 3.0V, GND = 0V, FB shorted to OUT, CIN = 0.1F, RIN = 75 to GND, RL = 150 to GND, SHDN = VCC, TA = +25C, unless otherwise noted.) SMALL-SIGNAL GAIN vs. FREQUENCY SMALL-SIGNAL GAIN FLATNESS vs. FREQUENCY 1 0.2 0.1 -2 -0.3 -0.4 100k 1M -0.5 -0.6 10M 100M 100k 100M 100k 1 0.2 0.1 -3 -4 100k 1M -5 -6 10M GAIN (dB) -2 -0.4 AV = 2 VCC = 5V VOUT = 100mVP-P 0 -1 -0.3 100M 100M 10M MAX4090 toc06 2 0 -0.1 -0.2 -0.3 -0.4 AV = 2 VCC = 3V VOUT = 2VP-P 100k -0.5 -0.6 1M 10M 100M AV = 2 VCC = 3V VOUT = 2VP-P 100k 1M 100M 10M FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) LARGE-SIGNAL GAIN vs. FREQUENCY LARGE-SIGNAL GAIN FLATNESS vs. FREQUENCY POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 1 0.2 0.1 VCC = 3V -10 -20 -1 -2 -3 PSRR (dB) 0 GAIN (dB) 0 -0.1 -0.2 -0.4 -0.5 -0.6 1M 10M FREQUENCY (Hz) 100M -30 -40 -50 -0.3 AV = 2 VCC = 5V VOUT = 2VP-P MAX4090 toc09 2 0 MAX4090 toc08 0.3 MAX4090 toc07 3 100k 1M 0.3 MAX4090 toc05 MAX4090 toc04 3 GAIN (dB) GAIN (dB) -6 10M AV = 2 VCC = 5V VOUT = 100mVP-P LARGE-SIGNAL GAIN FLATNESS vs. FREQUENCY -0.2 -6 1M -5 LARGE-SIGNAL GAIN vs. FREQUENCY 0 -5 -4 AV = 2 VCC = 3V VOUT = 100mVP-P SMALL-SIGNAL GAIN FLATNESS vs. FREQUENCY -0.1 -4 -3 FREQUENCY (Hz) 0.1 -0.6 -2 FREQUENCY (Hz) 0.2 -0.5 -1 FREQUENCY (Hz) 0.3 4 -0.2 -4 AV = 2 VCC = 3V VOUT = 100mVP-P 0 -0.1 -3 -6 1 GAIN (dB) -1 -5 2 0 GAIN (dB) GAIN (dB) 0 3 MAX4090 toc03 2 SMALL-SIGNAL GAIN vs. FREQUENCY MAX4090 toc02 0.3 MAX4090 toc01 3 GAIN (dB) MAX4090 3V/5V, 6dB Video Buffer with Sync-Tip Clamp and 150nA Shutdown Current -60 AV = 2 VCC = 5V VOUT = 2VP-P 100k -70 -80 1M 10M FREQUENCY (Hz) 100M 10k 100k 1M FREQUENCY (Hz) _______________________________________________________________________________________ 10M 100M 3V/5V, 6dB Video Buffer with Sync-Tip Clamp and 150nA Shutdown Current 6.75 6.70 -40 -50 -60 0.50 6.65 VCC = 5V 6.60 6.55 6.50 0.30 6.40 -70 0.25 6.35 -80 6.30 100k 1M 100M 10M 0.20 -50 -25 FREQUENCY (Hz) 25 50 75 100 -50 -25 TEMPERATURE (C) CLAMP VOLTAGE vs. TEMPERATURE 2.10 MAX4090 toc13 VCC = 5V 0.55 VCC = 3V 0.40 50 75 100 VOLTAGE GAIN vs. TEMPERATURE VCC = 5V 2.05 GAIN (V/V) GAIN (V/V) 0.45 25 2.10 2.05 0.50 0 TEMPERATURE (C) VOLTAGE GAIN vs. TEMPERATURE 0.60 VCLAMP (V) 0 MAX4090 toc14 10k 0.40 0.35 VCC = 3V 6.45 0.45 MAX4090 toc15 -30 VCC = 3V 0.55 VCLAMP (V) SUPPLY CURRENT (mA) PSRR (dB) -20 0.60 MAX4090 toc11 VCC = 5V -10 6.80 MAX4090 toc10 0 CLAMP VOLTAGE vs. TEMPERATURE QUIESCENT SUPPLY CURRENT vs. TEMPERATURE MAX4090 toc12 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 2.00 2.00 0.35 1.95 0.30 1.95 0.25 1.90 0.20 -25 0 25 50 75 OUTPUT VOLTAGE HIGH (V) -25 0 25 50 75 100 -50 -25 0 25 50 75 TEMPERATURE (C) TEMPERATURE (C) TEMPERATURE (C) OUTPUT VOLTAGE HIGH SWING vs. TEMPERATURE OUTPUT VOLTAGE HIGH SWING vs. TEMPERATURE LARGE-SIGNAL PULSE RESPONSE VCC = 3V 2.8 2.7 2.6 2.5 2.4 2.3 100 MAX4090 toc18 5.0 MAX4090 toc17 MAX4090 toc16 3.0 2.9 1.90 -50 100 VCC = 5V 4.9 OUTPUT VOLTAGE HIGH (V) -50 4.8 VIN 500mV/div 4.7 4.6 4.5 4.4 4.3 2.2 4.2 2.1 4.1 VOUT 1V/div 4.0 2.0 -50 -25 0 25 50 TEMPERATURE (C) 75 100 -50 -25 0 25 50 75 100 10ns/div TEMPERATURE (C) _______________________________________________________________________________________ 5 MAX4090 Typical Operating Characteristics (continued) (VCC = 3.0V, GND = 0V, FB shorted to OUT, CIN = 0.1F, RIN = 75 to GND, RL = 150 to GND, SHDN = VCC, TA = +25C, unless otherwise noted.) Typical Operating Characteristics (continued) (VCC = 3.0V, GND = 0V, FB shorted to OUT, CIN = 0.1F, RIN = 75 to GND, RL = 150 to GND, SHDN = VCC, TA = +25C, unless otherwise noted.) SMALL-SIGNAL PULSE RESPONSE DIFFERENTIAL GAIN AND PHASE MAX4090 toc19 VIN 25mV/div MAX4090 toc20 DIFFERENTIAL GAIN (%) 2.0 1.0 0 -1.0 -2.0 0 1 2 3 4 5 6 0 1 2 3 4 5 6 1.0 DIFFERENTIAL PHASE () MAX4090 3V/5V, 6dB Video Buffer with Sync-Tip Clamp and 150nA Shutdown Current VOUT 50mV/div 0.5 0 -0.5 -1.0 10ns/div Typical Application Circuit Pin Description PIN NAME 1 OUT Video Output 2 GND Ground 3 IN 4 VCC 5 SHDN 6 FB FUNCTION VCC Video Input Power-Supply Voltage. Bypass with a 0.1F capacitor to ground as close to pin as possible. Shutdown. Pull SHDN low to place the MAX4090 in low-power shutdown mode. MAX4090 IN OUT RIN RL CLAMP Feedback. Short to VCC. FB SHDN GND 6 _______________________________________________________________________________________ 3V/5V, 6dB Video Buffer with Sync-Tip Clamp and 150nA Shutdown Current The MAX4090 3V/5V, 6dB video buffer with sync-tip clamp and low-power shutdown mode is available in tiny SOT23 and SC70 packages. The MAX4090 is designed to drive DC-coupled, 150 back-terminated video loads in portable video applications such as digital still cams, portable DVD players, digital camcorders, PDAs, videoenabled cell phones, portable game systems, and notebook computers. The input clamp positions the video waveform at the output and allows the MAX4090 to be used as a DC-coupled output driver. The MAX4090 operates from a single 2.7V to 5.5V supply and consumes only 6.5mA of supply current. The low-power shutdown mode reduces the supply current to 150nA, making the MAX4090 ideal for low-voltage, battery-powered video applications. The input signal to the MAX4090 is AC-coupled through a capacitor into an active sync-tip clamp circuit, which places the minimum of the video signal at approximately 0.38V. The output buffer amplifies the video signal while still maintaining the 0.38V clamp voltage at the output. For example, if VIN = 0.38V, then VOUT = 0.38V. If VIN = (0.38V + 1V) = 1.38V, then VOUT = (0.38V + 2 X (1V)) = 2.38V. The net result is that a 2V video output signal swings within the usable output voltage range of the output buffer when VCC = 3V. Shutdown Mode The MAX4090 features a low-power shutdown mode (ISHDN = 150nA) for battery-powered/portable applications. Pulling the SHDN pin high enables the output. Connecting the SHDN pin to ground (GND) disables the output and places the MAX4090 into a low-power shutdown mode. Applications Information The active sync-tip clamp also requires that the input impedance seen by the input capacitor be less than 100 typically to function properly. This is easily met by the 75 input resistor prior to the input-coupling capacitor and the back termination from a prior stage. Insufficient input resistance to ground causes the MAX4090 to appear to oscillate. Never operate the MAX4090 in this mode. Layout and Power-Supply Bypassing The MAX4090 operates from single 2.7V to 5.5V supply. Bypass the supply with a 0.1F capacitor as close to the pin as possible. Maxim recommends using microstrip and stripline techniques to obtain full bandwidth. To ensure that the PC board does not degrade the device's performance, design it for a frequency greater than 1GHz. Pay careful attention to inputs and outputs to avoid large parasitic capacitance. Whether or not you use a constant-impedance board, observe the following design guidelines: * Do not use wire-wrap boards; they are too inductive. * Do not use IC sockets; they increase parasitic capacitance and inductance. * Use surface-mount instead of through-hole components for better, high-frequency performance. * Use a PC board with at least two layers; it should be as free from voids as possible. * Keep signal lines as short and as straight as possible. Do not make 90 turns; round all corners. Chip Information TRANSISTOR COUNT: 755 PROCESS: BiCMOS Input Coupling the MAX4090 The MAX4090 input must be AC-coupled because the input capacitor stores the clamp voltage. The MAX4090 requires a typical value of 0.1F for the input clamp to meet the Line Droop specification. A minimum of a ceramic capacitor with an X7R temperature coefficient is recommended to avoid temperature-related problems with Line Droop. For extended temperature operation, such as outdoor applications, or where the impressed voltage is close to the rated voltage of the capacitor, a film dielectric is recommended. Increasing the capacitor value slows the clamp capture time. Values above 0.5F should be avoided since they do not improve the clamp's performance. _______________________________________________________________________________________ 7 MAX4090 Detailed Description MAX4090 3V/5V, 6dB Video Buffer with Sync-Tip Clamp and 150nA Shutdown Current VCC = 2.7V TO 5.5V VCC CBYP 0.1F RSOURCE 75 ESIGNAL SHDN MAX4090 CIN 0.1F IN OUT RIN 75 ROUT 75 EOUT RL 75 CLAMP FB GND Figure 1. Typical Operating Circuit 8 _______________________________________________________________________________________ 3V/5V, 6dB Video Buffer with Sync-Tip Clamp and 150nA Shutdown Current SC70, 6L.EPS _______________________________________________________________________________________ 9 MAX4090 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 6LSOT.EPS MAX4090 3V/5V, 6dB Video Buffer with Sync-Tip Clamp and 150nA Shutdown Current PACKAGE OUTLINE, SOT-23, 6L 21-0058 F 1 1 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.