LT1252

LT1252 Low Cost Video Amplifier FEATURES s s s s s s s s DESCRIPTIO 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 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. 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. APPLICATI s s s S RGB Cable Drivers Composite Video Cable Drivers Gain Blocks in IF Stages TYPICAL APPLICATI 5V VIN + LT1252 – –5V RF 620Ω RG 620Ω Transient Response 75Ω 75Ω CABLE VOUT 75Ω AV = 1 + RF BW = 100MHz RG AT AMPLIFIER OUTPUT. 6dB LESS AT VOUT. LT1252 • TA01 VS = ± 5V AV = 2 RL = 150Ω VO = 1V U LT1252 • TA02 UO UO 1 LT1252 ABSOLUTE AXI U RATI GS Storage Temperature Range ................ – 65°C to 150°C Junction Temperature (Note 2)............................ 150°C Lead Temperature (Soldering, 10 sec)................. 300°C 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 PACKAGE/ORDER I FOR ATIO TOP VIEW NC 1 – IN 2 +IN 3 V– 4 8 7 6 5 NC V+ OUT NC ORDER PART NUMBER NC 1 2 3 4 LT1252CS8 S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 150°C/ W S8 PART MARKING 1252 ELECTRICAL CHARACTERISTICS SYMBOL VOS +IB – IB AVOL PSRR CMRR VOUT IOUT IS RIN CIN PARAMETER Input Offset Voltage Noninverting Bias Current Inverting Bias Current Large-Signal Voltage Gain Power Supply Rejection Ratio Common-Mode Rejection Ratio Maximum Output Voltage Swing Maximum Output Current Supply Current Input Resistance Input Capacitance Power Supply Range SR Input Slew Rate Output Slew Rate Dual Single 0°C ≤ TA ≤ 70°C, VS = ± 5V to ± 12V, unless otherwise noted. MIN TYP 5 1 20 MAX 15 15 100 UNITS mV µA µA V/V dB dB V V mA 18 mA MΩ pF ± 12 24 125 250 V V V/µs V/µs CONDITIONS VS = ± 5V, VO = ± 2V, RL = 150Ω VS = ± 3V to ± 12V VS = ± 5V, VCM = ± 2V VS = ±12V, RL = 500Ω VS = ± 5V, RL = 150Ω AV = 1 AV = 2 2 U U W WW U W TOP VIEW 8 7 6 5 NC V+ OUT NC ORDER PART NUMBER LT1252CN8 –IN +IN V– N8 PACKAGE 8-LEAD PLASTIC DIP TJMAX = 150°C, θJA = 100°C/ W 560 60 55 ± 7.0 ± 2.5 30 1 ±2 4 1500 70 65 ± 10.5 ± 3.7 55 8.5 10 3 LT1252 ELECTRICAL CHARACTERISTICS 0°C ≤ TA ≤ 70°C, VS = ± 5V to ± 12V, unless otherwise noted. SYMBOL tr tp PARAMETER Small-Signal Rise Time Rise and Fall Time Propagation Delay CONDITIONS VS = ± 12V, AV = 2 VS = ± 5V, AV = 2, VOUT = 1VP-P VS = ± 5V, AV = 2 LT1252CN8: TJ = TA + (PD × 100°C/W) LT1252CS8: TJ = TA + (PD × 150°C/W) MIN TYP 3.5 5.2 3.5 MAX UNITS ns ns ns 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: TYPICAL AC PERFOR A CE BANDWIDTH VS ± 12 ± 12 ± 12 ± 12 ± 12 ± 12 ± 12 ± 12 ± 12 ±5 ±5 ±5 ±5 ±5 ±5 ±5 ±5 ±5 ±5 AV 1 –1 –1 2 2 5 5 10 10 1 1 –1 –1 2 2 5 5 10 10 RL 150 1000 150 1000 150 1000 150 1000 150 1000 150 1000 150 1000 150 1000 150 1000 150 RF 2370 1100 909 1210 909 1000 866 909 768 2210 1300 1000 732 909 787 825 698 750 619 RG None 1100 909 1210 909 249 215 100 84.5 None None 1000 732 909 787 205 174 82.5 68.1 SMALL SIGNAL – 3dB BW (MHz) 282 58 73 253 142 73 75 67 69 260 232 50 69 133 100 62 66 58 60 SMALL SIGNAL – 0.1dB BW (MHz) 45 17 34 20 38 25 31 26 32 10 50 11 34 24 30 21 30 22 30 SMALL SIGNAL PEAKING (dB) 1.9 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2.4 0.8 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 NTSC VIDEO (Note 1) VS ± 12 ±12 ±5 ±5 AV 2 2 2 2 RL 1000 150 1000 150 RF 1000 1000 1000 1000 RG 1000 1000 1000 1000 DIFFERENTIAL GAIN 0.02% 0.03% 0.02% 0.01% DIFFERENTIAL PHASE 0.02° 0.04° 0.08° 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 UW amplifier stages were cascaded giving an effective resolution of 0.01% and 0.01°. 3 LT1252 TYPICAL PERFOR A CE CHARACTERISTICS Supply Current vs Supply Voltage 14 13 SUPPLY CURRENT (mA) OUTPUT SATURATION VOLTAGE (V) 11 10 9 8 7 6 5 4 0 2 4 –55°C COMMON-MODE RANGE (V) 12 25°C 125°C 175°C 6 8 10 12 14 SUPPLY VOLTAGE (±V) Settling Time to 10mV vs Output Step 10 8 6 NONINVERTING INVERTING VS = ±12V RF = RG = 1k –30 POWER SUPPLY REJECTION (dB) DISTORTION (dBc) OUTPUT STEP (V) 4 2 0 –2 –4 –6 –8 –10 0 20 60 40 SETTLING TIME (ns) Spot Noise Voltage and Current vs Frequency 100 100 –in OUTPUT IMPEDANCE (Ω) 10 RF = RG = 2k RF = RG = 1k 0.1 OUTPUT SHORT-CIRCUIT CURRENT (mA) SPOT NOISE (nV/√Hz OR pA/√Hz) 10 en +in 1 10 100 1k 10k FREQUENCY (Hz) 4 UW 16 18 LT1252 • TPC01 Input Common-Mode Limit vs Temperature V+ –0.5 –1.0 –1.5 –2.0 V + = 2V TO 12V V+ –0.5 –1.0 Output Saturation Voltage vs Temperature RL = ∞ ±2V ≤ VS ≤ ±12V 2.0 1.5 1.0 0.5 V– –50 –25 50 25 0 75 TEMPERATURE (°C) 100 125 V – = – 2V TO –12V 1.0 0.5 V– –50 –25 50 25 75 0 TEMPERATURE (°C) 100 125 LT1252 • TPC02 LT1252 • TPC03 2nd and 3rd Harmonic Distortion vs Frequency –20 VS = ±12V VO = 2VP-P RL = 100Ω RF = 820Ω AV = 10dB 2ND 3RD 80 Power Supply Rejection vs Frequency VS = ±12V RL = 100Ω RF = RG = 1k 60 POSITIVE NEGATIVE 40 –40 –50 –60 20 –70 80 100 1 10 FREQUENCY (MHz) 100 LT1252 • TPC05 0 10k 100k 1M 10M FREQUENCY (Hz) 100M LT1252 • TPC06 LT1252 • TPC04 Output Impedance vs Frequency 70 VS = ±12V Output Short-Circuit Current vs Junction Temperature 60 1 50 40 0.01 100k LT1252 • TPC07 0.001 10k 100k 1M 10M FREQUENCY (Hz) 100M 30 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) LT1252 • TPC09 LT1252 • TPC08 LT1252 TYPICAL PERFOR A CE CHARACTERISTICS ± 12V Frequency Response 5 4 3 2 PHASE 0 –20 –40 –60 GAIN (dB) GAIN (dB) 1 0 –1 –2 –3 –4 –5 1M VS = ± 12V AV = 1 RL = 150Ω RF = 2.37k 10M 100M FREQUENCY (Hz) 1G LT1252 • TPC10 ± 12V Frequency Response 12 11 10 9 PHASE 0 –20 –40 –60 GAIN (dB) 7 6 5 4 3 2 1M VS = ±12V AV = 2 RL = 150Ω RF = 909Ω RG = 909Ω –100 –120 –140 –160 GAIN –180 –200 10M 100M FREQUENCY (Hz) 1G LT1252 • TPC12 GAIN (dB) 8 ± 12V Frequency Response 26 25 24 23 GAIN (dB) GAIN (dB) 22 21 20 19 18 17 16 1M VS = ±12V AV = 10 RL = 150Ω RF = 768Ω RG = 84.5Ω GAIN 10M 100M FREQUENCY (Hz) UW ± 5V Frequency Response 5 4 3 2 PHASE (DEG) 0 –20 –40 PHASE –60 PHASE (DEG) –80 GAIN –100 –120 –140 –160 –180 –200 1 0 –1 –2 –3 –4 –5 1M VS = ±5V AV = 1 RL = 150Ω RF = 1.3k 10M 100M FREQUENCY (Hz) 1G LT1252 • TPC11 –80 GAIN –100 –120 –140 –160 –180 –200 ± 5V Frequency Response 12 11 10 9 PHASE (DEG) 0 –20 –40 PHASE –60 PHASE (DEG) –80 8 7 6 5 4 3 2 1M VS = ±5V AV = 2 RL = 150Ω RF = 787Ω RG = 787Ω GAIN –80 –100 –120 –140 –160 –180 –200 10M 100M FREQUENCY (Hz) 1G LT1252 • TPC13 ± 5V Frequency Response 0 –20 –40 26 25 24 23 PHASE (DEG) 22 21 20 19 18 17 16 1M VS = ± 5V AV = 10 RL = 150Ω RF = 619Ω RG = 68.1Ω GAIN PHASE 0 –20 –40 –60 PHASE (DEG) –80 –100 –120 –140 –160 –180 –200 10M 100M FREQUENCY (Hz) 1G LT1252 • TPC15 PHASE –60 –80 –100 –120 –140 –160 –180 –200 1G LT1252 • TPC14 5 LT1252 TYPICAL PERFOR A CE CHARACTERISTICS Transient Response Transient Response VS = ± 5V AV = 1 RL = 150Ω RF = 619Ω VO = 1V TYPICAL APPLICATIO S Single Supply AC-Coupled Amplifier Noninverting 5V + 22µF 10k 4.7µF AV = 510Ω ≈ 10 RS + 51Ω 10k VIN + 10k LT1252 VOUT 2.2µF – 220µF 51Ω 510Ω AV = 11 BW = 14Hz to 60MHz RS VIN LT1252 • TA03 + 6 + VI – U UW LT1252 • TPC16 VS = ± 5V AV = 10 RL = 150Ω RF = 619Ω RG = 68.1Ω VO = 1.5V LT1252 • TPC17 Single Supply AC-Coupled Amplifier Inverting 5V + 4.7µF BW = 14Hz to 60MHz + + 10k + LT1252 VOUT – 220µF 51Ω 510Ω LT1252 • TA04 + Half Wave Rectifier 750Ω 1N5712 750Ω 750Ω 1N5712 LT1252 VOUT LT1252 • TA05 LT1252 SI PLIFIED SCHE ATIC V+ +IN PACKAGE DESCRIPTIO 0.300 – 0.320 (7.620 – 8.128) 0.009 – 0.015 (0.229 – 0.381) 0.065 (1.651) TYP 0.125 (3.175) MIN 0.020 (0.508) MIN ( +0.025 0.325 –0.015 8.255 +0.635 –0.381 ) 0.045 ± 0.015 (1.143 ± 0.381) 0.100 ± 0.010 (2.540 ± 0.254) 0.010 – 0.020 × 45° (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 0.016 – 0.050 0.406 – 1.270 0.053 – 0.069 (1.346 – 1.752) 0°– 8° TYP 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. U W W –IN VOUT V– LT1252 • SS Dimensions in inches (millimeters) unless otherwise noted. N8 Package 8-Lead Plastic DIP 0.045 – 0.065 (1.143 – 1.651) 0.130 ± 0.005 (3.302 ± 0.127) 0.400 (10.160) MAX 8 7 6 5 0.250 ± 0.010 (6.350 ± 0.254) 1 2 3 4 0.018 ± 0.003 (0.457 ± 0.076) N8 0392 S8 Package 8-Lead Plastic SOIC 0.189 – 0.197 (4.801 – 5.004) 0.004 – 0.010 (0.101 – 0.254) 8 7 6 5 0.228 – 0.244 (5.791 – 6.197) 0.014 – 0.019 (0.355 – 0.483) 0.050 (1.270) BSC 0.150 – 0.157 (3.810 – 3.988) SO8 0392 1 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 Linear Technology Corporation 266 Lowell St., Suite B-8 Wilmington, MA 01887 Phone: (508) 658-3881 FAX: (508) 658-2701 SOUTHEAST REGION Linear Technology Corporation 17060 Dallas Parkway Suite 208 Dallas, TX 75248 Phone: (214) 733-3071 FAX: (214) 380-5138 CENTRAL REGION Linear Technology Corporation Chesapeake Square 229 Mitchell Court, Suite A-25 Addison, IL 60101 Phone: (708) 620-6910 FAX: (708) 620-6977 SOUTHWEST REGION Linear Technology Corporation 22141 Ventura Blvd. Suite 206 Woodland Hills, CA 91364 Phone: (818) 703-0835 FAX: (818) 703-0517 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 GERMANY Linear Techonolgy GmbH Untere Hauptstr. 9 D-85386 Eching Germany Phone: 49-89-3197410 FAX: 49-89-3194821 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 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 SINGAPORE Linear Technology Pte. Ltd. 101 Boon Keng Road #02-15 Kallang Ind. Estates Singapore 1233 Phone: 65-293-5322 FAX: 65-292-0398 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 UNITED KINGDOM Linear Technology (UK) Ltd. The Coliseum, Riverside Way Camberley, Surrey GU15 3YL United Kingdom Phone: 44-276-677676 FAX: 44-276-64851 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 1630 McCarthy Blvd., Milpitas, CA 95035-7487 (408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977 LT/GP 0694 2K REV A © LINEAR TECHNOLOGY CORPORATION 1994