LT1252 Low Cost Video Amplifier U DESCRIPTIO FEATURES ■ ■ ■ ■ ■ ■ ■ ■ Low Cost Current Feedback Amplifier Differential Gain: 0.01%, RL = 150Ω, VS = ±5V Differential Phase: 0.09°, RL = 150Ω, VS = ±5V Flat to 30MHz, 0.1dB 100MHz Bandwidth on ±5V Wide Supply Range: ±2V(4V) to ±14V(28V) Low Power: 85mW at ±5V UO APPLICATI ■ ■ The LT1252 is available in the 8-pin DIP and the S8 surface mount package. For higher performance and shutdown operation, see the LT1227. For dual and quad amplifiers with similar performance see the LT1253/LT1254. RGB Cable Drivers Composite Video Cable Drivers Gain Blocks in IF Stages UO ■ S The LT1252 is a low cost current feedback amplifier for video applications. The LT1252 is ideal for driving low impedance loads such as cables and filters. The wide bandwidth and high slew rate of this amplifier make driving RGB signals between PCs and workstations easy. The linearity of the LT1252 is outstanding; it is unsurpassed for driving composite video. TYPICAL APPLICATI Transient Response 5V VIN + 75Ω LT1252 – –5V 75Ω CABLE RF 620Ω VOUT RG 620Ω RF BW = 100MHz RG AT AMPLIFIER OUTPUT. 6dB LESS AT VOUT. 75Ω AV = 1 + LT1252 • TA01 VS = ±5V AV = 2 RL = 150Ω VO = 1V LT1252 • TA02 1 LT1252 W W W AXI U U ABSOLUTE RATI GS Total Supply Voltage (V + to V –) ............................. 28V Input Current ..................................................... ±15mA Output Short-Circuit Duration (Note 1) ........ Continuous Operating Temperature Range .................... 0°C to 70°C Storage Temperature Range ................ – 65°C to 150°C Junction Temperature (Note 2)............................ 150°C Lead Temperature (Soldering, 10 sec)................. 300°C W U U PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER TOP VIEW NC 1 8 NC – IN 2 7 V+ +IN 3 6 V– 4 5 ORDER PART NUMBER TOP VIEW NC 1 8 NC –IN 2 7 V+ OUT +IN 3 6 OUT NC V– 4 5 NC LT1252CS8 S8 PART MARKING S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 150°C/ W N8 PACKAGE 8-LEAD PLASTIC DIP TJMAX = 150°C, θJA = 100°C/ W 1252 ELECTRICAL CHARACTERISTICS LT1252CN8 0°C ≤ TA ≤ 70°C, VS = ±5V to ±12V, unless otherwise noted. SYMBOL PARAMETER TYP MAX VOS Input Offset Voltage CONDITIONS MIN 5 15 mV +IB Noninverting Bias Current 1 15 µA – IB Inverting Bias Current 20 100 AVOL Large-Signal Voltage Gain VS = ±5V, VO = ±2V, RL = 150Ω 560 1500 V/V PSRR Power Supply Rejection Ratio VS = ±3V to ±12V 60 70 dB 65 dB ±10.5 ±3.7 V V CMRR Common-Mode Rejection Ratio VS = ±5V, VCM = ±2V 55 VOUT Maximum Output Voltage Swing VS = ±12V, RL = 500Ω VS = ±5V, RL = 150Ω ±7.0 ±2.5 IOUT Maximum Output Current IS Supply Current RIN Input Resistance CIN Input Capacitance Power Supply Range SR 2 30 55 8.5 1 µA mA 18 10 mA MΩ 3 ±2 4 Dual Single UNITS pF ±12 24 V V Input Slew Rate AV = 1 125 V/µs Output Slew Rate AV = 2 250 V/µs LT1252 ELECTRICAL CHARACTERISTICS 0°C ≤ TA ≤ 70°C, VS = ±5V to ±12V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS tr Small-Signal Rise Time VS = ±12V, AV = 2 3.5 ns Rise and Fall Time VS = ±5V, AV = 2, VOUT = 1VP-P 5.2 ns Propagation Delay VS = ±5V, AV = 2 3.5 ns tp Note 1: A heat sink may be required to keep the junction temperature below absolute maximum when the output is shorted indefinitely. Note 2: TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formulas: MIN TYP MAX UNITS LT1252CN8: TJ = TA + (PD × 100°C/W) LT1252CS8: TJ = TA + (PD × 150°C/W) W U TYPICAL AC PERFOR A CE BANDWIDTH VS AV RL RF RG SMALL SIGNAL – 3dB BW (MHz) SMALL SIGNAL – 0.1dB BW (MHz) SMALL SIGNAL PEAKING (dB) ±12 1 150 2370 None 282 45 1.9 ±12 –1 1000 1100 1100 58 17 0.1 ±12 –1 150 909 909 73 34 0.1 ±12 2 1000 1210 1210 253 20 0.1 ±12 2 150 909 909 142 38 0.1 ±12 5 1000 1000 249 73 25 0.1 ±12 5 150 866 215 75 31 0.1 ±12 10 1000 909 100 67 26 0.1 ±12 10 150 768 84.5 69 32 0.1 ±5 1 1000 2210 None 260 10 2.4 ±5 1 150 1300 None 232 50 0.8 ±5 –1 1000 1000 1000 50 11 0.1 ±5 –1 150 732 732 69 34 0.1 ±5 2 1000 909 909 133 24 0.1 ±5 2 150 787 787 100 30 0.1 ±5 5 1000 825 205 62 21 0.1 ±5 5 150 698 174 66 30 0.1 ±5 10 1000 750 82.5 58 22 0.1 ±5 10 150 619 68.1 60 30 0.1 NTSC VIDEO (Note 1) VS AV RL RF RG DIFFERENTIAL GAIN DIFFERENTIAL PHASE ±12 2 1000 1000 1000 0.02% 0.02° ±12 2 150 1000 1000 0.03% 0.04° ±5 2 1000 1000 1000 0.02% 0.08° ±5 2 150 1000 1000 0.01% 0.09° Note 1: Differential Gain and Phase are measured using a Tektronix TSG 120 YC/NTSC signal generator and a Tektronix 1780R Video Measurement Set. The resolution of this equipment is 0.1% and 0.1°. Ten identical amplifier stages were cascaded giving an effective resolution of 0.01% and 0.01°. 3 LT1252 U W TYPICAL PERFOR A CE CHARACTERISTICS Input Common-Mode Limit vs Temperature 14 V+ 13 –0.5 COMMON-MODE RANGE (V) –55°C 10 25°C 9 8 125°C 7 175°C 6 V+ V + = 2V TO 12V –1.0 –1.5 –2.0 2.0 1.5 V – = –2V TO –12V 1.0 0.5 5 V– –50 –25 4 0 2 4 6 8 10 12 14 SUPPLY VOLTAGE (±V) 16 18 50 25 0 75 TEMPERATURE (°C) DISTORTION (dBc) INVERTING 0 –2 –4 100 –40 2ND 3RD –50 –60 –6 125 80 –30 NONINVERTING 50 25 75 0 TEMPERATURE (°C) Power Supply Rejection vs Frequency VS = ±12V VO = 2VP-P RL = 100Ω RF = 820Ω AV = 10dB VS = ±12V RF = RG = 1k 6 OUTPUT STEP (V) 0.5 LT1252 • TPC03 –20 10 2 1.0 2nd and 3rd Harmonic Distortion vs Frequency Settling Time to 10mV vs Output Step 4 –1.0 LT1252 • TPC02 LT1252 • TPC01 8 RL = ∞ ±2V ≤ VS ≤ ±12V –0.5 V– –50 –25 125 100 POWER SUPPLY REJECTION (dB) SUPPLY CURRENT (mA) 12 11 Output Saturation Voltage vs Temperature OUTPUT SATURATION VOLTAGE (V) Supply Current vs Supply Voltage VS = ±12V RL = 100Ω RF = RG = 1k 60 POSITIVE NEGATIVE 40 20 –8 –10 20 60 40 SETTLING TIME (ns) 80 10 FREQUENCY (MHz) 1 100 100 Spot Noise Voltage and Current vs Frequency 100 70 100 1k 10k FREQUENCY (Hz) 1 RF = RG = 2k RF = RG = 1k 0.1 0.01 +in 1 10 OUTPUT SHORT-CIRCUIT CURRENT (mA) 10 OUTPUT IMPEDANCE (Ω) SPOT NOISE (nV/√Hz OR pA/√Hz) VS = ±12V en 100k LT1252 • TPC07 100M Output Short-Circuit Current vs Junction Temperature 100 –in 1M 10M FREQUENCY (Hz) LT1252 • TPC06 Output Impedance vs Frequency 10 100k LT1252 • TPC05 LT1252 • TPC04 4 0 10k –70 0 0.001 10k 100k 1M 10M FREQUENCY (Hz) 100M LT1252 • TPC08 60 50 40 30 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) LT1252 • TPC09 LT1252 U W TYPICAL PERFOR A CE CHARACTERISTICS ±12V Frequency Response ±5V Frequency Response 4 3 PHASE 0 –20 4 –20 –40 3 –60 2 –80 GAIN 0 –100 –40 PHASE –80 GAIN 0 –120 –120 –2 –140 –2 –160 –3 –180 –4 –200 –5 1M –4 –5 1M VS = ±12V AV = 1 RL = 150Ω RF = 2.37k 10M 100M FREQUENCY (Hz) 1G –140 VS = ±5V AV = 1 RL = 150Ω RF = 1.3k –160 –180 –200 10M 100M FREQUENCY (Hz) ±12V Frequency Response ±5V Frequency Response 12 0 12 0 11 –20 11 –20 –40 10 10 PHASE –60 7 –100 6 –120 5 4 3 2 1M VS = ±12V AV = 2 RL = 150Ω RF = 909Ω RG = 909Ω GAIN 10M 100M FREQUENCY (Hz) –40 PHASE 9 –80 7 –100 6 –120 –140 5 –160 4 –180 3 –200 2 1M 1G –60 8 VS = ±5V AV = 2 RL = 150Ω RF = 787Ω RG = 787Ω –140 GAIN –160 –180 –200 10M 100M FREQUENCY (Hz) LT1252 • TPC12 1G LT1252 • TPC13 ±12V Frequency Response ±5V Frequency Response 26 0 26 0 25 –20 25 –20 PHASE –40 24 –60 23 21 –100 20 19 18 17 16 1M –120 VS = ±12V AV = 10 RL = 150Ω RF = 768Ω RG = 84.5Ω GAIN 10M 100M FREQUENCY (Hz) 1G LT1252 • TPC14 –40 PHASE –60 22 –80 21 –100 20 –140 19 –160 18 –180 17 –200 16 1M –120 VS = ±5V AV = 10 RL = 150Ω RF = 619Ω RG = 68.1Ω PHASE (DEG) –80 PHASE (DEG) 22 GAIN (dB) 24 23 PHASE (DEG) –80 PHASE (DEG) 8 GAIN (dB) 9 GAIN (dB) 1G LT1252 • TPC11 LT1252 • TPC10 GAIN (dB) –100 –1 –1 –3 –60 1 PHASE (DEG) 1 5 PHASE (DEG) GAIN (dB) 2 0 GAIN (dB) 5 –140 GAIN –160 –180 –200 10M 100M FREQUENCY (Hz) 1G LT1252 • TPC15 5 LT1252 U W TYPICAL PERFOR A CE CHARACTERISTICS Transient Response Transient Response VS = ±5V AV = 1 RL = 150Ω RF = 619Ω VO = 1V VS = ±5V AV = 10 RL = 150Ω LT1252 • TPC16 LT1252 • TPC17 RF = 619Ω RG = 68.1Ω VO = 1.5V U TYPICAL APPLICATIO S Single Supply AC-Coupled Amplifier Inverting Single Supply AC-Coupled Amplifier Noninverting 5V 5V 4.7µF 4.7µF + AV = 22µF + VIN 10k + 510Ω ≈ 10 RS + 51Ω 10k BW = 14Hz to 60MHz + 10k + + VOUT LT1252 2.2µF + 51Ω RS 510Ω VIN AV = 11 BW = 14Hz to 60MHz 220µF + 51Ω LT1252 • TA03 750Ω 750Ω 750Ω VI 1N5712 – + 1N5712 LT1252 510Ω LT1252 • TA04 Half Wave Rectifier VOUT LT1252 • TA05 6 VOUT – – 220µF LT1252 10k LT1252 W W SI PLIFIED SCHE ATIC V+ –IN +IN VOUT V– LT1252 • SS U PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. N8 Package 8-Lead Plastic DIP 0.300 – 0.320 (7.620 – 8.128) 0.045 – 0.065 (1.143 – 1.651) +0.025 0.325 –0.015 8.255 +0.635 –0.381 0.130 ± 0.005 (3.302 ± 0.127) 8 7 6 5 0.065 (1.651) TYP 0.009 – 0.015 (0.229 – 0.381) ( 0.400 (10.160) MAX 0.250 ± 0.010 (6.350 ± 0.254) 0.125 (3.175) MIN 0.045 ± 0.015 (1.143 ± 0.381) ) 0.100 ± 0.010 (2.540 ± 0.254) 0.020 (0.508) MIN 1 2 4 3 0.018 ± 0.003 (0.457 ± 0.076) N8 0392 S8 Package 8-Lead Plastic SOIC 0.189 – 0.197 (4.801 – 5.004) 0.010 – 0.020 × 45° (0.254 – 0.508) 0.053 – 0.069 (1.346 – 1.752) 8 0.004 – 0.010 (0.101 – 0.254) 7 6 5 0.008 – 0.010 (0.203 – 0.254) 0°– 8° TYP 0.016 – 0.050 0.406 – 1.270 0.228 – 0.244 (5.791 – 6.197) 0.014 – 0.019 (0.355 – 0.483) 0.150 – 0.157 (3.810 – 3.988) 0.050 (1.270) BSC SO8 0392 1 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 2 3 4 7 LT1252 U.S. Area Sales Offices NORTHEAST REGION Linear Technology Corporation One Oxford Valley 2300 E. Lincoln Hwy.,Suite 306 Langhorne, PA 19047 Phone: (215) 757-8578 FAX: (215) 757-5631 SOUTHEAST REGION Linear Technology Corporation 17060 Dallas Parkway Suite 208 Dallas, TX 75248 Phone: (214) 733-3071 FAX: (214) 380-5138 SOUTHWEST REGION Linear Technology Corporation 22141 Ventura Blvd. Suite 206 Woodland Hills, CA 91364 Phone: (818) 703-0835 FAX: (818) 703-0517 Linear Technology Corporation 266 Lowell St., Suite B-8 Wilmington, MA 01887 Phone: (508) 658-3881 FAX: (508) 658-2701 CENTRAL REGION Linear Technology Corporation Chesapeake Square 229 Mitchell Court, Suite A-25 Addison, IL 60101 Phone: (708) 620-6910 FAX: (708) 620-6977 NORTHWEST REGION Linear Technology Corporation 782 Sycamore Dr. Milpitas, CA 95035 Phone: (408) 428-2050 FAX: (408) 432-6331 International Sales Offices FRANCE Linear Technology S.A.R.L. Immeuble "Le Quartz" 58 Chemin de la Justice 92290 Chatenay Malabry France Phone: 33-1-41079555 FAX: 33-1-46314613 KOREA Linear Technology Korea Branch Namsong Building, #505 Itaewon-Dong 260-199 Yongsan-Ku, Seoul Korea Phone: 82-2-792-1617 FAX: 82-2-792-1619 TAIWAN Linear Technology Corporation Rm. 801, No. 46, Sec. 2 Chung Shan N. Rd. Taipei, Taiwan, R.O.C. Phone: 886-2-521-7575 FAX: 886-2-562-2285 GERMANY Linear Techonolgy GmbH Untere Hauptstr. 9 D-85386 Eching Germany Phone: 49-89-3197410 FAX: 49-89-3194821 SINGAPORE Linear Technology Pte. Ltd. 101 Boon Keng Road #02-15 Kallang Ind. Estates Singapore 1233 Phone: 65-293-5322 FAX: 65-292-0398 UNITED KINGDOM Linear Technology (UK) Ltd. The Coliseum, Riverside Way Camberley, Surrey GU15 3YL United Kingdom Phone: 44-276-677676 FAX: 44-276-64851 JAPAN Linear Technology KK 5F YZ Bldg. 4-4-12 Iidabashi, Chiyoda-Ku Tokyo, 102 Japan Phone: 81-3-3237-7891 FAX: 81-3-3237-8010 World Headquarters Linear Technology Corporation 1630 McCarthy Blvd. Milpitas, CA 95035-7487 Phone: (408) 432-1900 FAX: (408) 434-0507 0294 8 Linear Technology Corporation LT/GP 0694 2K REV A 1630 McCarthy Blvd., Milpitas, CA 95035-7487 (408) 432-1900 ● FAX: (408) 434-0507 ● TELEX: 499-3977 LINEAR TECHNOLOGY CORPORATION 1994