19-4904; Rev 0; 9/09 TION KIT EVALUA BLE AVAILA 3V Video Amplifier with Internal Gain and Filter in SC70 The MAX9680 high-speed amplifier and filter is optimized for portable video applications. It is specifically designed to be compatible with the video encoders embedded in application processors with 0.4VP-P video output. The input common-mode range includes GND, which allows a video DAC (digital-to-analog converter) to be DC-coupled to the MAX9680. The output swings within 2mV of GND and 20mV to VDD with a standard back-terminated video load (150I). An internal level shift circuit prevents the output from saturating with 0V input, thus preventing sync-pulse clipping in common video circuits. Therefore, the MAX9680 is ideally suited for DC-coupling to the video load. The MAX9680 has been optimized for space-sensitive applications by integrating internal gain setting resistors (G = 5.2V/V) and a 2-pole video-DAC reconstruction filter. In shutdown mode, the quiescent current is reduced to less than 0.4FA, dramatically reducing power consumption and prolonging battery life. The MAX9680 is available in the tiny 2mm x 2.1mm, 6-pin, SC70 package. Features S 5.2V/V Internal Gain S 2-Pole Reconstruction Filter S Input Range Includes Ground S DC-Coupled Inputs and Outputs S Rail-to-Rail Output S 3.7mA Low Quiescent Current S 0.4µA Shutdown Current Ordering Information TEMP RANGE PART MAX9680AXT+T -40NC to +125NC PINPACKAGE TOP MARK 6 SC70 ADT +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. Typical Application Circuit appears at end of data sheet. Block Diagram Applications Mobile Phones Digital Still Cameras VDD Digital Video Cameras Pin Configuration IN RIN BUFFER RSET GND 2 OUT MAX9680 TOP VIEW IN 1 LPF RSET + G = 5.2V/V 6 VDD MAX9680 RSET 3 5 ENABLE ENABLE SHUTDOWN CONTROL 4 OUT SC70 GND ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. MAX9680 General Description MAX9680 3V Video Amplifier with Internal Gain and Filter in SC70 ABSOLUTE MAXIMUM RATINGS Supply Voltage (VDD to GND)..................................-0.3V to +4V ENABLE to GND.......................................................-0.3V to +4V IN to GND.................................................. -0.3V to (VDD + 0.3V) OUT to GND (ENABLE is high)................. -0.3V to (VDD + 0.3V) OUT to GND (ENABLE is low)..............................-0.3V to +3.2V ENABLE, IN...................................................................... Q50mA OUT............................................................................Continuous Electrostatic Discharge Human Body Model........................................................2000V Charged Device Model....................................................500V Thermal Limits (Note 1) Multiple-Layer PCB Continuous Power Dissipation (TA = +70NC) 6-Pin SC70 (derate 3.1mW/C above +70NC)..............245mW 6-Pin SC70 BJA. .....................................................326.5NC/W 6-Pin SC70 BJC.........................................................115NC/W Operating Temperature Range......................... -40NC to +125NC Junction Temperature......................................................+150NC Storage Temperature Range............................. -65NC to +150NC Lead Temperature (soldering, 10s).................................+300NC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. 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. ELECTRICAL CHARACTERISTICS (VDD = VENABLE = 2.8V, VGND = 0V, RL = 150I to GND. TA = -40NC to +125NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX 120 250 UNITS OFFSET LEVEL-SHIFT VOLTAGE Output Level-Shift Voltage VOLS VIN = VGND Power-Supply Rejection Ratio PSRR VIN = VGND, VDD = 2.7V to 3.6V 0 200 mV FV/V INPUT VOLTAGE RANGE Input Voltage Range Input Resistance (In+) RSET Resistance VCM RIN RSET VDD = 2.7V VGND 0.445 VDD = 2.8V VGND 0.464 V VIN = 0.5V 732 872 1012 I VRSET = 0.5V 3150 3750 4350 I 4.214 4.3 4.386 RSET/RIN Ratio VOLTAGE GAIN DC Voltage Gain (Note 3) AV VDD = 2.7V, VIN = VGND to 0.445V 5.00 5.17 5.34 VDD = 2.8V, VIN = VGND to 0.464V 5.00 5.17 5.34 V/V FREQUENCY RESPONSE VIN = VGND to 0.387V Filter Response f = 4.5MHz -0.2 f = 9MHz -3.5 f = 27MHz -23 f = 54MHz -45 dB Differential Gain Error Five-step modulated staircase of 127.8mV step size and 305.3mV peak-to-peak subcarrier amplitude, f = 4.43MHz 0.2 % Differential Phase Error Five-step modulated staircase of 127.8mV step size and 305.3mV peak-to-peak subcarrier amplitude, f = 4.43MHz 0.3 degrees Group Delay Variation 100kHz P f P 5.5MHz, VIN = VGND to 0.387V 15 ns 100% white signal 65 dB Signal-to-Noise Ratio SNR 2 _______________________________________________________________________________________ 3V Video Amplifier with Internal Gain and Filter in SC70 (VDD = VENABLE = 2.8V, VGND = 0V, RL = 150I to GND. TA = -40NC to +125NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS OUTPUT Positive Voltage Output Swing from Rail VIN = 0.7V 20 250 mV Negative Voltage Output Swing from Rail VIN = -0.05V 1.8 5 mV Positive Voltage Output Swing from Rail VIN = 0.7V, RL = 75I to GND 35 mV Negative Voltage Output Swing from Rail VIN = -0.05V, RL = 75I to GND 1 mV Output Leakage Disabled, VOUT = 2V Output Short-Circuit Current IOUT 2 Short to GND 90 FA mA POWER SUPPLY Supply Voltage VDD Supply Current IDD 2.7 No load 3.7 3.6 V 9 mA V ENABLE/SHUTDOWN FUNCTION Disabled (Logic-Low Threshold) 0 0.45 Enabled (Logic-High Threshold) 1.3 VDD Enable Time 350 Disable Time 200 Shutdown Current Disabled 0.4 V ns ns 4 FA Note 2: All devices are 100% production tested at TA = +25NC. Specifications over temperature limits are guaranteed by design. Note 3: Voltage gain (AV) is a two-point measurement in which the output voltage swing is divided by the input voltage swing. Typical Operating Characteristics (VDD = VENABLE = 2.8V, VGND = 0V, RL = 150I to GND. TA = +25NC, unless otherwise noted.) 875 870 865 3800 3750 3700 -60 -40 -20 0 20 40 60 80 100 120 140 TEMPERATURE (°C) 4.3 4.2 4.1 3650 860 4.4 RSET/RIN (I/I) 880 4.5 MAX9680 toc02 3850 SET RESISTANCE (I) INPUT RESISTANCE (I) 885 RSET/RIN vs. TEMPERATURE SET RESISTANCE vs. TEMPERATURE 3900 MAX9680 toc01 890 MAX9680 toc03 INPUT RESISTANCE vs. TEMPERATURE VIN = 0.4V 4.0 3600 -60 -40 -20 0 20 40 60 80 100 120 140 TEMPERATURE (°C) -60 -40 -20 0 20 40 60 80 100 120 140 TEMPERATURE (°C) _______________________________________________________________________________________ 3 MAX9680 ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (continued) (VDD = VENABLE = 2.8V, VGND = 0V, RL = 150I to GND. TA = +25NC, unless otherwise noted.) OUTPUT VOLTAGE vs. TEMPERATURE VIN = -50mV 5.2 5.1 20 40 60 80 100 120 140 2.80 2.75 2.70 2.65 2.60 -60 -40 -20 0 -60 -40 -20 0 20 40 60 80 100 120 140 20 40 60 80 100 120 140 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) OUTPUT VOLTAGE LEVEL SHIFT vs. TEMPERATURE VIN = VGND QUIESCENT CURRENT vs. TEMPERATURE VENABLE = 2.8V OUTPUT LEAKAGE CURRENT vs. TEMPERATURE ENABLE = GND, VOUT = 2V 0.125 0.100 0.075 0.050 7 6 5 4 0.025 3 0 -60 -40 -20 0 TEMPERATURE (°C) OUTPUT LEAKAGE CURRENT vs. TEMPERATURE, ENABLE = 0 SHUTDOWN QUIESCENT CURRENT HYSTERESIS vs. TEMPERATURE 70 60 SHORT TO VCC 30 20 40 60 80 100 120 140 TEMPERATURE (°C) MAX9680 toc09 -20 MAX9680 toc11 -30 TA = +25°C TA = +125°C -35 -40 0.01 -60 -40 -20 0 -15 -25 SHORT TO GND 0 -5 -10 0.1 20 10 GAIN vs. FREQUENCY TA = -40°C 1 20 40 60 80 100 120 140 0 GAIN (dB) QUIESCENT CURRENT (mA) 80 -60 -40 -20 0 TEMPERATURE (°C) 10 MAX9680 toc10 90 0.1 20 40 60 80 100 120 140 TEMPERATURE (°C) 100 1 0.01 -60 -40 -20 0 20 40 60 80 100 120 140 10 MAX9680 toc12 0.150 100 OUTPUT LEAKAGE CURRENT (nA) 8 QUIESCENT CURRENT (mA) 0.175 MAX9680 toc08 9 MAX9680 toc07 0.200 OUTPUT VOLTAGE LEVEL SHIFT (V) 2 0 -60 -40 -20 0 40 3 1 5.0 50 2.85 OUTPUT VOLTAGE (V) 5.3 2.90 MAX9680 toc05 4 OUTPUT VOLTAGE (mV) 5.4 GAIN (V/V) 5 MAX9680 toc04 5.5 OUTPUT VOLTAGE vs. TEMPERATURE VIN = 700mV MAX9680 toc06 GAIN vs. TEMPERATURE OUTPUT LEAKAGE CURRENT (nA) MAX9680 3V Video Amplifier with Internal Gain and Filter in SC70 0.6 0.7 0.8 ENABLE VOLTAGE (V) 0.9 1.0 100 1000 10,000 FREQUENCY (kHz) 4 _______________________________________________________________________________________ 100,000 3V Video Amplifier with Internal Gain and Filter in SC70 TURN-OFF TIME VCC (2V/div) MAX9680 toc14 MAX9680 toc13 TURN-ON TIME VCC (2V/div) GND GND OUTPUT (1V/div) OUTPUT (1V/div) GND GND TIME (40ns/div) TIME (200ns/div) OUTPUT VOLTAGE vs. OUTPUT SINKING CURRENT TA = +85°C 1.5 TA = 0°C AND +25°C 1.0 TA = -25°C MAX9680 toc16 100 90 80 TA = 0°C 2.0 70 TA = -25°C DELAY (ns) 2.0 2.5 OUTPUT VOLTAGE (V) TA = +125°C TA = +125°C 1.5 TA = +85°C TA = -40°C 1.0 0 0 40 40 10 0 20 50 20 TA = -40°C 60 80 100 120 0 0.5 OUTPUT CURRENT (mA) 1.0 1.5 2.0 1000 100 3.0 2.5 DIFFERENTIAL GAIN AND PHASE f = 4.43MHz DIFFERENTIAL GAIN AND PHASE f = 4.43MHz 0.6 0.4 DIFFERENTIAL PHASE (deg) 0.02 0.01 0 -0.01 -0.02 100,000 MAX9680 toc19 0.03 10,000 FREQUENCY (kHz) OUTPUT CURRENT (mA) MAX9680 toc18 0 60 30 TA = +25°C 0.5 0.5 DIFFERENTIAL GAIN (%) OUTPUT VOLTAGE (V) 2.5 GROUP DELAY vs. FREQUENCY 3.0 MAX9680 toc15 3.0 MAX9680 toc17 OUTPUT VOLTAGE vs. OUTPUT CURRENT 0.2 0 -0.2 -0.4 -0.03 -0.6 0 1 2 3 4 5 0 1 2 3 4 5 _______________________________________________________________________________________ 5 MAX9680 Typical Operating Characteristics (continued) (VDD = VENABLE = 2.8V, VGND = 0V, RL = 150I to GND. TA = +25NC, unless otherwise noted.) MAX9680 3V Video Amplifier with Internal Gain and Filter in SC70 Pin Description PIN NAME DESCRIPTION 1 IN 2 GND Input Ground 3 RSET Resistor Set. The reference voltage of the current digital-to-analog converter (DAC) is applied across the internal RSET resistor to generate the reference current of the DAC. 4 OUT Output 5 ENABLE 6 VDD Enable. Drive high to enable the device. Pull low to disable the device. Positive Power Supply. Bypass to GND with a 0.1FF capacitor. Detailed Description The MAX9680 filters and amplifies the video DAC output in applications such as mobile phones. The MAX9680 consists of two resistors, an input buffer, lowpass filter, and output amplifier capable of driving a standard 150I video load to ground. The output amplifier provides a fixed gain of 5.17V/V. RSET Resistor The video current DAC imposes a reference voltage, VREF, across RSET. The resulting current (VREF/RSET) is the reference current for the video current DAC. Input The video input should be directly connected to the output of the video current DAC. RIN, the equivalent input resistance, is 872I to ground. The output current of the video DAC flows through RIN to create the video signal in the voltage domain. Video Filter The filter bandwidth (-3dB) is typically 9MHz, making the device suitable for standard-definition video signals from all sources (e.g., broadcast and DVD). Broadcast video signals are channel limited: NTSC signals have 4.2MHz bandwidth, and PAL signals have 5MHz bandwidth. Video signals from a DVD player, however, are not channel limited; so the bandwidth of DVD video signals can approach the Nyquist limit of 6.75MHz. Recommendation: ITU-R BT.601-5 specifies 13.5MHz as the sampling rate for standard-definition video. Therefore, the maximum bandwidth of the signal is 6.75MHz. To ease the filtering requirements, most modern video systems oversample by two times, clocking the video current DAC at 27MHz. Output The MAX9680 features 5.17V/V gain. Operating from a 2.7V to 3.6V supply, the output amplifier is able to drive a 2.3V signal into a 150I video load to ground. The output is typically offset 120mV above ground to guarantee linear operation of the amplifier. The MAX9680 output only sources current; all loads should be connected to ground. Short-Circuit Protection The MAX9680 Typical Application Circuit includes a 75I back-termination resistor that limits short-circuit currents for an external short applied at the video output. The MAX9680 features internal output short-circuit protection to prevent device damage in prototyping and applications where the amplifier output can be directly shorted. Short-circuit protection activates if the output is short circuited and the output current exceeds 90mA. During short-circuit protection, the output of the MAX9680 is shut off for 18Fs and then turns on for 0.6Fs. If the short is still present, the MAX9680 output shuts off again. Extended short circuits result in a pulsed output. The device resumes normal operation after the short is removed. 6 _______________________________________________________________________________________ 3V Video Amplifier with Internal Gain and Filter in SC70 Output Considerations The MAX9680 output must be DC-coupled. No AC-coupled capacitors are allowed. The MAX9680 connects directly to the video cable through a 75I series back-termination resistor. The other end of the cable should be properly terminated with a 75I resistor as well. Because of this configuration, the peak-to-peak amplitude as well as the DC level of the signal is divided by two. The MAX9680 output signal is level-shifted up so the sync tip is approximately 120mV. Input Considerations The MAX9680 input is DC-coupled. When the supply voltage is between 2.7V and 3.6V, the input voltage range extends from ground to 0.445V. When the supply voltage is between 2.8V and 3.6V, the input voltage range extends from ground to 0.464V. A typical current-output DAC that operates from a single supply usually creates a composite video signal with a sync tip very close to ground. Hence, the DAC output can be directly connected to the MAX9680 input. Keep the board trace as short as possible to minimize parasitic stray capacitance and prevent unintentional high-frequency attenuation. Power-Supply Bypassing and Ground The MAX9680 operates from a single-supply voltage down to 2.7V, allowing for low-power operation. Bypass VDD to GND with a 0.1FF capacitor. Place all external components as close as possible to the device. Typical Application Circuit VDD = 2.8V VIDEO ENCODER DAC IN RIN BUFFER LPF OUT 75I RSET MAX9680 RSET G = 5.2V/V GENERAL-PURPOSE OUTPUT ENABLE SHUTDOWN CONTROL GND Chip Information PROCESS: BiCMOS _______________________________________________________________________________________ 7 MAX9680 Application Information Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 6 SC70 X6SN+1 21-0077 SC70, 6L.EPS MAX9680 3V Video Amplifier with Internal Gain and Filter in SC70 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. 8 © 2009 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.