Fast Buffer LLC LH0033 / LH0033C GENERAL DESCRIPTION FEATURES * Slew rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500V/s * Wide range single or dual supply operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100MHz * Bandwidth * High output drive . . . . . . . . . . . . . . . 10V with 50 load * Low phase non-linearity . . . . . . . . . . . . . . . . 2 degrees times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3ns * Rise * High input resistance:. . . . . . . . . . . . . . . . . . . . . . . 1010 * High output current (peak) . . . . . . . . . . . . . . . . . 250mA The LH0033 is a high speed, FET input, voltage follower/buffer designed to provide high current drive (up to 100mA) at frequencies from DC to over 100MHz. The LH0033 slews at 1500V/s and exhibits excellent phase linearity up to 20MHz. LH0033 is intended to fulfill a wide range of buffer applications such as high speed line drivers, video impedance transformation, nuclear instrumentation amplifiers, op amp isolation buffers for driving reactive loads and high impedance input buffers for high speed A to Ds and comparators. In addition, the LH0033 can continuously drive 50 coaxial cables or be used as a yoke driver for high resolution CRT displays. APPLICATIONS Cable Driver * Coaxial * Fast Op Amp Booster * Flash Converter Driver Line Driver * Video * High Speed Sample and Hold * ATE Pin Driver Amplifier * Video * Radar * Sonar OP Amp Output * Boost * Isolate Capacitance Load This device is constructed using specially selected junction FETs and active laser trimming to achieve guaranteed performance specifications. The LH0033 is specified for operation from -55oC to +125oC and the LH0033C is specified from -25oC to 85oC. The LH0033 is available in a 2.2W metal TO-8 package. ORDERING INFORMATION Part Package LH0033G LH0033CG H12A (TO8 12 Lead) H12A (TO8 12 Lead) Temperature Range -55oC to 125oC -25oC to 85oC CONNECTION DIAGRAM LH0033 Metal Can Package NC VC+ NC 3 NC INPUT 2 V+ 1 4 12 5 11 6 OFFSET PRESET 10 7 OFFSET ADJUST OUTPUT 8 V- 9 NC VC Top View Case is electrically Isolated Package H12A CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A LH0033 / LH0033C LLC ABSOLUTE MAXIMUM RATINGS Continuous Output Current LH0033/LH0033C . . . . . . . . . . . . . . . . . . . . . . . . . 100mA Peak Output Current LH0033/LH0033C . . . . . . . . . . . . . . . . . . . . . . . . . 250mA Lead Temp. (Soldering, 10 seconds). . . . . . . . . . . . . . . 300oC Operating Temperature Range LH0033. . . . . . . . . . . . . . . . . . . . . . . . . . . . -55oC to +125oC LH0033C . . . . . . . . . . . . . . . . . . . . . . . . . . . -25oC to +85oC Storage Temperature Range . . . . . . . . . . -65oC to +150oC If Military/Aerospace specified devices are required, please contact Calogic Sales Office for availability and specifications. Supply Voltage (V+ - V-). . . . . . . . . . . . . . . . . . . . . . . . . . . 40V Power Dissipation (See Curves) LH0033/LH0033C . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2W Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 175oC Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSupply DC ELECTRICAL CHARACTERISTICS: The following specifications apply for supply voltage = 15V unless otherwise noted (Note 1) SYMBOL LH0033 CHARACTERISTICS MIN VOS Output Offset Voltage VOS T Average Temperature Coefficient of Offset Voltage IB Input Bias Current AV Voltage Gain RIN Input Impedance ROUT Output Impedance V(SWING 1) Output Voltage Swing V(SWING 2) LH0033C TYP MAX 5.0 50 MIN 0.98 10 11 10 10 15 12 20 25 mV mV RS = 100, TJ = 25oC, VIN = 0V (Note 2), RS = 100 100 50 100 V/ oC RS = 100, VIN = 0V (Note 3) 500 5.0 20 pA nA nA VIN = 0V TJ = 25 oC (Note 2) TA = 25oC (Note 4) TJ = TA = T MAX 1.00 V/V VO = 10V, RS = 100, RL = 1.0k RL = 1k 10 VIN = 1.0V, RL = 1.0k 1.00 10 0.96 0.98 10 11 10 6.0 CONDITIONS MAX 250 2.5 10 0.97 UNITS TYP 10 10 6.0 12 12 9.0 9.0 VI = 14V, RL = 1.0k V VI = 10.5V, RL = 100, TA = 25oC IS Supply Current 18 22 18 24 mA VIN = 0V (Note 5) PD Power Consumption 540 660 540 720 mW VIN = 0V AC ELECTRICAL CHARACTERISTICS: TJ = 25oC, VS = 15V, RS = 50, RL = 1.0K (Note 3) SYMBOL LH0033 CHARACTERISTICS MIN TYP 1000 1500 LH0033C MAX MIN TYP 1000 1400 UNITS CONDITIONS MAX Slew Rate BW Bandwidth 100 100 MHz Phase Non- Linearity 2.0 2.0 degrees Rise Time 2.9 3.2 ns VIN = 0.5V Propagation Delay 1.2 1.5 ns VIN = 0.5V Harmonic Distortion <0.1 <0.1 % f>1kHz RT V/s VIN = 10V SR VIN = 1.0Vrms BW = 1.0Hz to 20MHz o Note 1: LH0033 is 100% production tested as specified at 25 C. Specifications at temperature extremes are verified by sample testing, correlation or periodic characterization. Note 2: Specification is at 25oC junction temperature due to requirements of high speed automatic testing. Actual values at operating temperature will exceed the value at TJ = 25oC. When supply voltages are 15V, no-load operating junction temperature may rise 40-60oC above ambient, and more under load conditions. Accordingly, VOS may change one to several mV, and IB will change significantly during warm-up. Note 3: Limits are guaranteed by sample testing, periodic characterization or correlation. Note 4: Measured in still air 7 minutes after application of power. Guaranteed through correlated automatic pulse testing. Note 5: Guaranteed through correlated automatic pulse testing at TJ = 25oC. CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A LH0033 / LH0033C LLC TYPICAL PERFORMANCE CHARACTERISTICS SUPPLY CURRENT vs SUPPLY VOLTAGE POWER DISSIPATION 21 SUPPLY CURRENT (mA) POWER DISSIPATION (W) 2.0 CASE JC = 60C/W 1.5 1.0 AMBIENT JA = 100C/W 0.5 20 TC = +125C TC = +25C TC = -55C 19 18 17 0 0 25 50 75 100 125 150 5 SUPPLY VOLTAGE (V) OUTPUT VOLTAGE vs SUPPLY VOLTAGE NEGATIVE PULSE RESPONSE INPUT/OUTPUT VOLTAGE (-V) VS = 15V 16 OUTPUT VOLTAGE (V) 20 TEMPERATURE (C) 18 RL = 1k RS = 100k TC = +25C 14 12 10 8 6 4 5 15 10 0 RS = 50 RL = 1k TC = +25C -2 -4 INPUT -6 OUTPUT -8 -10 -12 20 0 10 50 40 8 INPUT 4 OUTPUT 2 0 35 RS = 50 RL = 1k VIN = 1.0 Vrms 30 Av 1.0 0.8 20 0.6 15 10 0.4 0.2 10 20 30 TIME (ns) 40 50 60 25 1.0 2.0 5.0 10.0 20.0 50 PHASE LAG (DEGREES) VOLTAGE GAIN (V/V) VS = 15V 10 0 60 FREQUENCY RESPONSE VS = 15V RL = 1k, RS = 50 TC = +25C 6 40 TIME (ns) POSITIVE PULSE RESPONSE 12 30 20 SUPPLY VOLTAGE (V) INPUT/OUTPUT VOLTAGE (V) 15 10 5 100 FREQUENCY (MHz) CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A LH0033 / LH0033C LLC TYPICAL PERFORMANCE CHARACTERISTICS (Continued) RISE AND FALL TIME vs TEMPERATURE 6.0 10 VS = 15V RS = 50 RL = 1k INPUT BIAS CURRENT (nA) RISE AND FALL TIME (ns) 8.0 INPUT BIAS CURRENT vs TEMPERATURE tf 4.0 tr 2.0 0 -50 1 VS = 15V 0.100 VS = 5V 0.010 0.001 0 50 100 150 0 25 50 75 100 TEMPERATURE (C) TEMPERATURE (C) NORMALIZED INPUT BIAS CURRENT DURING WARM-UP INPUT BIAS CURRENT vs INPUT VOLTAGE 125 10 100 VS = 15V VS = 15V TA = 25C INPUT BIAS CURRENT (nA) CURRENT - NORMALIZED TO CURRENT AT TIME = 0 VS = 10V 10 PULSE TESTED (TJ = 25C) 1.0 0.1 1 0 2 4 6 8 10 TIME FROM POWER TURN-ON (MINUTES) 10 8 6 4 2 0 -2 -6 -10 INPUT VOLTAGE (V) CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A LH0033 / LH0033C LLC APPLICATION INFORMATION: Recommended Layout Precautions where: RF/video printed circuit board layout rules should be followed when using the LH0033 since it will provide power gain to frequencies over 100MHz. Ground planes are recommended and power supplies should be decoupled at each device with low inductance capacitors. In addition, ground plane shielding may be extended to the metal case of the device since it is electrically isolated from internal circuitry. Alternatively the case should be connected to the output to minimize input capacitance. Offset Voltage Adjustment V+ = Positive supply voltage V - = Negative supply voltage For the above example, VO would be -35mV. This may be adjusted to zero as described in Figure 1. For AC coupled applications, no additional offset occurs if the DC input is properly biased as illustrated in the Typical Applications section. Short Circuit Protection The LH0033's offset voltages have been actively trimmed by laser to meet guaranteed specifications when the offset preset pin is shorted to the offset adjust pin. If offset null is desirable, it is simply obtained by leaving the offset preset pin open and connecting a trim pot of 200 for the LH0033 between the offset adjust pin and V-, as illustrated in Figure 1. Operation From Single Or Asymmetrical Power Supplies LH0033 may be used in applications where symmetrical supplies are unavailable or not desirable. A typical application might be an interface to a MOS shift register where V+ = +5V and V - = -12V. In this case, an apparent output offset occurs due to the device's voltage gain of less than unity. This additional output error may be predicted by: VO (1-AV) AV = No load voltage gain, typically 0.99 (V+-V-) = 0.005 (V+ -V-) 2 FIGURE 1. Offset Zero Adjust In order to optimize transient response and output swing, output current limit has been omitted from the LH0033. Short circuit protection may be added by inserting appropriate value resistors between V+ and VC+ pins and V - and VC- pins as illustrated in Figure 2. Resistor values may be predicted by: RLIM V+ ISC = V- ISC where: ISC 100mA for LH0033 The inclusion of limiting resistors in the collectors of the output transistors reduces output voltage swing. Decoupling VC+ and VC- pins with capacitors to ground will retain full output swing for transient pulses. Alternate active current limit techniques that retain full DC output swing are shown in FIGURE 2. Resistor Current Limiting Using Resistor V+ R LIM +15V INPUT OFFSET PRESET (OPEN) OFFSET ADJUST 6 100 1 5 12 LH0033 C 0.1F 12 11 OUTPUT 10 INPUT 7 5 1 11 LH0033 OUTPUT 9 9 10 200 7 -15V R LIM 6 100 C 0.1F V- CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A LH0033 / LH0033C LLC where: Figure 3. In Figure 3, the current sources are saturated during normal operation, thus apply full supply voltage to the VC pins. Under fault conditions, the voltage decreases as required by the overload. Vp-p = Peak-to-peak output voltage swing f = Frequency For Figure 5: CL = Load Capacitance Operation Within An Op Amp Loop VBE 0.6V RLIM = = = 10 ISC 60mA LH0033 may be used as a current booster or isolator buffer within a closed loop with op amps such as LH0032, or CLM4124. An isolation resistor of 47 should be used between the op amp output and the input of LH0033. The wide bandwidth and high slew rate of the LH0033 assure that the loop has the characteristics of the op amp and that additional rolloff is not required. Capacitive Loading The LH0033 is designed to drive capacitive loads such as coaxial cables in excess of several thousand picofarads without susceptibility to oscillation. However, peak current resulting from (C x dV/d t ) should be limited below absolute maximum peak current ratings for the devices. Hardware Thus for the LH0033: ( In order to utilize the full drive capabilities of LH0033, it should be mounted with a heat sink particulary for extended temperature operation. The case is isolated from the circuit and may be connected to the system chassis. VIN ) x CL IOUT 250mA t In addition, power dissipation resulting from driving capacitive loads plus standby power should be kept below total package power rating: Design Precaution Power supply bypassing is necessary to prevent oscillation. Low inductance ceramic disc capacitors with the shortest practical lead lengths must be connected from each supply lead (within <14" to 12" of the device package) to a ground plane. Capacitors should be one or two 0.1F in parallel; adding a 4.7F solid tantalum capacitor will help troublsome instances. PDpkg. PDC + PAC PDpkg. (V+-V - ) x IS + PAC PAC (Vp-p)2 x f x CL FIGURE 3. Current Limiting Using Current Sources +15V R LIM 10 Q2 12 Q1 INPUT 5 1 11 LH0033 OUTPUT 9 10 7 0.01F 30k 6 Q3 Q1 = Q2 = 2N2905 Q3 = Q4 = 2N2219 Q4 R LIM 10 -15V CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A LH0033 / LH0033C LLC TYPICAL APPLICATIONS High Input Impedance AC Coupled Amplifier V+ 4.7pF 12 CASE 0.001F 5 INPUT 11 LH0033 OUTPUT 9 10 7 0.1F 6 0.1F Vf H 100MHz 1M Coaxial Cable Driver V+ C1* 12 51 INPUT 5 100 1 11 LH0033 43 9 10 6 100 50 7 V*Select C1 for Optimum Pulse Response CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A LH0033 / LH0033C LLC TYPICAL APPLICATIONS (Continued) High Input Impedance Comparator with Offset Adjust V+ VU.L. 3 V+ Instrumentation Shield/Line Driver 10 - V+ 4 12 INPUT 5 + 12 1 11 LH0033 100 LM711 9 CASE 1 10 7 51 - INPUT 7 5 11 LH0033 9 10 6 OFFSET ADJUST + 7 5 V- NO GO = LOGIC "1" GO = LOGIC "0" V- VL.L. 100 6 V- Single Supply AC Amplifier 4.5MHz Notch Filter VCC = 12.0V C1 150pF 12 12 CASE 1 R2 110 0.001F 5 INPUT 11 LH0033 V+ C1 150pF VIN 5 1 9 OUTPUT 10 9 C2 300pF 10 1M 11 LH0033 7 7 6 R1 220 1 2 R1C1 R1 = 2R2 6 R1 220 f0 = C1 = C2 2 V- CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A LH0033 / LH0033C LLC TYPICAL APPLICATIONS (Continued) High Speed Sample and Hold V+ V+ 7 ANALOG INPUT 5 12 100 1 11 LH0033 100 5 1 LH0033 9 10 6 OUTPUT 10 100 7 11 9 C1* 1000pF 6 7 VV- *Polycarbonate or TeflonTM LOGIC INPUT 1 2 CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A