T UCT ROD ACEMEN 47 P E 7 T L 7 E P 42 OL RE 00-4 m OBS ENDED 8 1 s.co MM ions ECO pplicat p@harri R January 1999 O A l N ap entraail: cent C l l Ca or em Semiconductor 100MHz Current Feedback Amplifier The HA-5004 current feedback amplifier is a video/wideband amplifier optimized for low gain applications. The design is based on current-mode feedback which allows the amplifier to achieve higher closed loop bandwidth than voltage-mode feedback operational amplifiers. Since feedback is employed, the HA-5004 can offer better gain accuracy and lower distortion than open loop buffers. Unlike conventional op amps, the bandwidth and rise time of the HA-5004 are nearly independent of closed loop gain. The 100MHz bandwidth at unity gain reduces to only 65MHz at a gain of 10. The HA-5004 may be used in place of a conventional op amp with a significant improvement in speed power product. Several features have been designed in for added value. A thermal overload feature protects the part against excessive junction temperature by shutting down the output. If this feature is not needed, it can be inhibited via a TTL input (TOI). A TTL chip enable/disable (OE) is also provided; when the chip is disabled its output is high impedance. Finally, an open collector output flag (TOL) is provided to indicate the status of the chip. The status flag goes low to indicate when the chip is disabled due to either the internal Thermal Overload shutdown or the external disable. In order to maximize bandwidth and output drive capacity, internal current limiting is not provided. However, current limiting may be applied via the VC+ and VC- pins which provide power separately to the output stage. • Slew Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1200V/µs • Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100mA • Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±9V into 100Ω • VSUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5V to ±18V • Thermal Overload Protection and Output Flag • Bandwidth Nearly Independent of Gain • Output Enable/Disable Applications • Unity Gain Video/Wideband Buffer • Video Gain Block • High Speed Peak Detector • Fiber Optic Transmitters • Zero Insertion Loss Transmission Line Drivers • Current to Voltage Converter • Radar Systems Part Number Information PART NUMBER TEMP. RANGE (oC) PACKAGE 0 to 70 14 Ld CERDIP HA1-5004-5 14 VC- VC+ 1 OUT 2 +BAL 3 -BAL 4 13 VEE + VCC 5 TEMP F14.3 OE TOI TJ TOL OUTPUT (OPEN COLLECTOR) 0 0 Normal 1 Normal 0 0 High (Note) 0 Auto Shutdown, HI-Z OUT 0 1 X 1 Normal 1 X X 0 Manual Shutdown, HI-Z OUT 12 -IN 11 +IN PKG. NO. TRUTH TABLE INPUTS HA-5004 (CERDIP) TOP VIEW File Number 2923.4 Features For Military grade product refer to the HA-5004/883 data sheet. Pinout HA-5004 NOTE: OPERATION >180oC Typical 10 TOL TOI 6 9 GND OE 7 8 N/C 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-800-4-HARRIS or 407-727-9207 | Copyright © Harris Corporation 1999 HA-5004 Absolute Maximum Ratings Thermal Information Supply Voltage (Between V+ and V- Terminals) . . . . . . . . . . . . 40V Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V DC Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±VSUPPLY Output Current . . . . . . . . . . . . . . . ±120mA Max (≤25% Duty Cycle) Thermal Resistance (Typical, Note 2) θJA (oC/W) θJC (oC/W) CERDIP Package. . . . . . . . . . . . . . . . . 75 20 Maximum Junction Temperature (Note 1) . . . . . . . . . . . . . . . 175oC Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC Operating Conditions Temperature Range HA-5004-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to 75oC CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. NOTES: 1. Maximum power dissipation, including load condition, must be designed to maintain the junction temperature below 175oC. See Thermal Resistances in the “Thermal Information” section. 2. θJA is measured with the component mounted on an evaluation PC board in free air. Electrical Specifications VCC = VC+ = +15V, VEE = VC- = -15V, RS = 50Ω, RL = 100Ω, AV = +1, RF = 250Ω, OE = 0.8V, TOI = 0.8V or 2.0V, Unless Otherwise Specified TEMP. (oC) MIN TYP MAX UNITS 25 - 1 5 mV Full - - 20 mV Average Offset Voltage Drift Full - 10 - µV/oC Bias Current (+Input Only) (Note 3) 25 - 2 5 µA Full - - 20 µA Input Resistance (-Input) 25 - 6.5 - Ω Input Resistance (+Input) 25 - 3 - MΩ Input Capacitance 25 - 3 - pF Common Mode Range Full ±10 - - V AVCL = +1 25 - -72 - dBc AVCL = +2 25 - -70 - dBc AVCL = +5 25 - -68 - dBc Input Noise Voltage 10Hz to 1MHz 25 - 15 - µVP-P Input Noise Voltage Density (Note 4) f = 10kHz 25 - 2.2 - nV/√Hz f = 100kHz 25 - 2.2 - nV/√Hz f = 10kHz 25 - 6 - pA/√Hz f = 100kHz 25 - 4 - pA/√Hz VIH Full 2.0 - - V VIL Full - - 0.8 V IIH at VI = 2.4V Full - - 1 µA IIH at VI = 0.4V Full - - 10 µA VOL at 800µA Full - 0.05 0.4 V PARAMETER TEST CONDITIONS INPUT CHARACTERISTICS Offset Voltage DISTORTION AND NOISE Total Harmonic Distortion (2VP-P, 200kHz) Input Noise Current Density (Note 4) DIGITAL I/O CHARACTERISTICS Logic Inputs (OE and TO) Logic Output (TOL) (Open Collector) 2 HA-5004 Electrical Specifications VCC = VC+ = +15V, VEE = VC- = -15V, RS = 50Ω, RL = 100Ω, AV = +1, RF = 250Ω, OE = 0.8V, TOI = 0.8V or 2.0V, Unless Otherwise Specified (Continued) PARAMETER TEST CONDITIONS TEMP. (oC) MIN TYP MAX UNITS 25 - 0.25 0.43 % TRANSFER CHARACTERISTICS DC Gain Error (Note 5) Small Signal (±100mV) DC Voltage Gain Large Signal (±10V) (RL = 1kΩ) Small and Large Signal DC Transimpedance (Note 6) -3dB Bandwidth (Note 7) AV = +1 Gain Flatness Full - 0.25 0.75 % 25 - 0.25 0.43 % Full - 0.25 0.75 % 25 233 400 - V/V Full 133 400 - V/V 25 - 100 - V/mA Full 33 100 - V/mA 25 - 100 - MHz DC to 5MHz 25 - 0.03 - dB DC to 10MHz 25 - 0.05 - dB Differential Gain (Notes 7, 8, 9, 3.58MHz) AVCL = +1 25 - 0.035 - % AVCL = +2 25 - 0.058 - % Differential Gain (Notes 7, 8, 9, 4.43MHz) AVCL = +1 25 - 0.035 - % AVCL = +2 25 - 0.058 - % Differential Phase (Notes 7, 8, 3.58MHz) Differential Phase (Notes 7, 8, 4.43MHz) Common Mode Rejection Ratio AVCL = +1 25 - 0.15 - Degrees AVCL = +2 25 - 0.23 - Degrees AVCL = +1 25 - 0.17 - Degrees AVCL = +2 25 - 0.24 - Degrees VCM = ±10V Full - 58 - dB Full 1 - - V/V Minimum Stable Gain OUTPUT CHARACTERISTICS Output Voltage Swing Full Power Bandwidth RL = 100Ω 25 ±9.0 ±9.5 - V RL = 1kΩ 25 ±11.5 ±11.8 - V RL = 100Ω Full ±8.0 ±9.5 - V RL = 1kΩ Full ±10.5 ±11.8 - V 25 - 50 - MHz Output Resistance, Open Loop AV = +1, VOUT = 4VP-P 25 - 5 - Ω Output Current 25 ±90 ±100 - mA Full ±80 ±100 - mA Output Enable Time HI-Z to ±2V Full - 100 - ns Output Disable Time ±2V to HI-Z Full - 3 - µs Output Leakage Disabled Full - - 1 µA Rise Time/Fall Time 200mV Step 25 - 6.3 - ns Propagation Delay 10V Step 25 - 7 - ns Slew Rate 10V Step 25 - 1200 - V/µs Settling Time 0.1%, 10V Step 25 - 50 - ns 25 - 10 - % 25 - 12 16 mA Full - - 22 mA 25 - 7 - mA TRANSIENT RESPONSE Overshoot POWER SUPPLY CHARACTERISTICS Supply Current Enabled Disabled 3 HA-5004 Electrical Specifications VCC = VC+ = +15V, VEE = VC- = -15V, RS = 50Ω, RL = 100Ω, AV = +1, RF = 250Ω, OE = 0.8V, TOI = 0.8V or 2.0V, Unless Otherwise Specified (Continued) PARAMETER TEST CONDITIONS Power Supply Rejection Ratio TEMP. (oC) MIN TYP MAX UNITS Full 50 60 - dB NOTES: 3. The inverting input is a low impedance point; Bias Current and Offset Current, are not specified for this terminal. 4. See typical performance curves. 1 5. Gain Error = --------------------------------------------- × 100% . DC Voltage Gain RF 6. DC Transimpedance = --------------------------- , R F = 250Ω . Gain Error 7. VIN = 300mVP-P. 8. VOFFSET = 1.0V. 9. Differential Gain (dB) = 0.0869 Differential Gain (%). Test Circuits and Waveforms INPUT VIN + - VOUT 249Ω OUTPUT AV = +1, VSUPPLY = ±15V Vertical Scale: 5V/Div.; Horizontal Scale: 20ns/Div. FIGURE 1. TEST CIRCUIT LARGE SIGNAL RESPONSE, AV = +1 INPUT INPUT OUTPUT OUTPUT AV = +1, VSUPPLY = ±15V Vertical Scale: 2V/Div.; Horizontal Scale: 20ns/Div. PROPAGATION DELAY 4 AV = +1, VSUPPLY = ±15V Vertical Scale: 100mV/Div.; Horizontal Scale: 20ns/Div. SMALL SIGNAL RESPONSE 5 QNT5 QPT6 QPT7 RT17 TOI QPT1 QNT6 QPT5 RT20 RT7 RT5 RT1 RT1 QNT2 QNT3 QPT4 TOL RT6 QPT11 RT16 DZT2 DZT1 QNT4 QPT2 QPT3 RT4 Schematic Diagram QNT8 QPT17 RT9 RT18 RT8 QPT15 QNT12 QNT7 QPT9 QPT6 RT19 QPT10 OE RT14 QPT18 RT15 QPT14 RT12 GND RT10 QNT9 QPT12 QNT11 QNT10 QPT13 RT13 R20 RXU9 R21 QP28 QN21 QP25 QN22 DZ1 QP22 R23 QN20 QN25 R25 23 QN QN32 IN QP23 QN26 QP32 R30 31 QP QN31 R28 QN1 QP24 R29 QN30 R24B QP30 R22A R22B QN24 DD8 QP1 R24A QN3 DD6 QP3 R6 QP2 QN2 R31 R3 BAL1 R27 DD4 DD3 FB DD2 DD1 R26 R7 QN4 CC1 QP4 R4 R34A R32 R34B RXU2 DD7 VCC R8 QN5 R36A R36B QP7 R37 OUT R35 QN7 VC+ VEE VC- QN6A QN6B DD8 QP6 QP5 R5 BAL 2 HA-5004 HA-5004 Application Information capacitors from each supply to ground are recommended, typically a 0.01µF ceramic in parallel with a 4.7µF electrolytic. Theory Of Operation The HA-5004 is a high performance amplifier that uses current feedback to achieve its outstanding performance. Although it is externally configured like an ordinary op amp in most applications, its internal operation is significantly different. Inside the HA-5004, there is a unity gain buffer from the noninverting (+) input to the inverting-input (as suggested by the circuit symbol), and the inverting terminal is a low impedance point. Error currents are sensed at the inverting input and amplified; a small change in input current produces a large change in output voltage. The ratio of output voltage delta due to input current delta is the transimpedance of the device. Steady state current at the inverting input is very small because the transimpedance is large. The voltage across the input terminals is nearly zero due to the buffer amplifier. These two properties are similar to standard op amps and likewise simplify circuit analysis. Resistor Selection The HA-5004 is optimized for a feedback resistor of 250Ω, regardless of gain configuration. It is important to note that this resistor is required even for unity gain applications; higher gain settings use a second resistor like regular op amp circuits as shown in Figure 2 below. +5V Current Limit No internal current limiting is provided for the HA-5004 in order to maximize bandwidth and slew rate. However, power is supplied separately to the output stage via pins 1 (VC+) and 14 (VC-) so that external current limiting resistors may be used. If required, 100Ω resistors to each supply rail are recommended. Enable/Disable and Thermal Overload Operation The HA-5004 operates normally with a TTL low state on pin 7 (OE) but it may be disabled manually by a TTL high state at this input. When disabled, the output and inverting-input go to a high impedance state and the circuit is electrically debiased, reducing supply current by about 5mA. It is important to keep the differential input voltage below the absolute maximum rating of 5V when the device is disabled. If the power dissipation becomes excessive and chip temperature exceeds approximately 180oC, the HA-5004 will automatically disable itself. The thermal overload condition will be indicated by a low state at the TOL output on pin 10. (TOL is also low for manual shutdown via pin 7). Automatic thermal shutdown can be bypassed by a TTL high state on Thermal Overload Inhibit (TOI) pin 6. See the truth table for a summary of operation. Offset Adjustment 10kΩ THERMAL OVERLOAD OE 7 8 NC VIN 100 -15V 9 GND TOI 6 10 TOL VCC 5 11 + 4 12 - 3 13 VEE 2 14 VC- VC+ 1 - 5kΩ BAL + VOUT 100Ω +15V RF 249Ω 249Ω FIGURE 2. TYPICAL APPLICATION CIRCUIT, AV = +2 Power Supplies The HA-5004 will operate over a wide range of supply voltages with excellent performance. Supplies may be either single-ended or split, ranging from 6V (±3V) to 36V (±18V). Appropriate reduction in input and output signal excursion is necessary for operation at lower supply voltages. Bypass 6 Offset voltage may be nulled with a 5kΩ potentiometer between pins 3 and 4, center tapped to the positive supply. Setting the slider towards pin 3 (+BAL) increases output voltage; towards pin 4 (-BAL) decreases output voltage. Offset can be adjusted by about ±10mV with a 5K pot; this range is extended with a lower resistance potentiometer. HA-5004 Typical Performance Curves VSUPPLY = ±15V, TA = 25oC, Unless Otherwise Specified 15 GAIN (dB) AV = 1 AV = +5 12 INPUT = 300mVP-P 9 AV = +2 0 6 0 45 AV = +1 PHASE 90 AV = +2 135 AV = +5 180 1 10 FREQUENCY (MHz) -3 ±10V -4 ±5V -6 1 10 FREQUENCY (MHz) 100 FIGURE 4. FREQUENCY RESPONSE vs SUPPLY VOLTAGE 40 RL = 1kΩ, Input = 10mV VCC = ±15V, AV = +1 SINEWAVE INPUT 35 6 30 3 0.0pF 0 10pF VOUT (VP-P) GAIN (dB) ±15V -5 VCC = ±15V, AV = +2 9 -2 100 FIGURE 3. GAIN AND PHASE vs FREQUENCY 12 GAIN (dB) 0 PHASE (DEGREES) AV = +1 10 FREQUENCY (MHz) 20 15 5 100pF 1 25 10 50pF 0 1K 100 10K 100K FREQUENCY (Hz) 1M 10M FIGURE 6. MAXIMUM UNDISTORTED SINEWAVE OUTPUT vs FREQUENCY FIGURE 5. FREQUENCY RESPONSE vs CL 20 SUPPLY CURRENT (mA) 10.0 IMPEDANCE (Ω) ±3.5V -1 3 1.0 0.1 16 12 8 4 0.01 1K 0 100K FREQUENCY (Hz) 1M FIGURE 7. CLOSED LOOP OUTPUT IMPEDANCE vs FREQUENCY 7 10M 0 2 4 6 8 10 12 SUPPLY VOLTAGE (±V) 14 16 FIGURE 8. SUPPLY CURRENT vs SUPPLY VOLTAGE 18 HA-5004 Typical Performance Curves VSUPPLY = ±15V, TA = 25oC, Unless Otherwise Specified (Continued) 8 55 VCC = ±15V VCC = ±15V 50 7 45 40 5 iN (pA/√Hz) eN (nV/√Hz) 6 4 3 35 30 25 20 15 2 10 1 5 0 0 10 100 1K FREQUENCY (Hz) 10K 100K 10 FIGURE 9. NOISE VOLTAGE vs FREQUENCY 100 1K FREQUENCY (Hz) FIGURE 10. NOISE CURRENT vs FREQUENCY Die Characteristics DIE DIMENSIONS: SUBSTRATE POTENTIAL (Powered Up): 63 mils x 93 mils x 19 mils 1600µm x 2370µm x 483µm VEE TRANSISTOR COUNT: METALLIZATION: Type: Al, 1% Cu Thickness: 16kÅ ±2kÅ 64 PROCESS: PASSIVATION: Bipolar Dielectric Isolation Type: Nitride (Si3N4) over (Silox, 5% Phos.) Silox Thickness: 12kÅ ±2kÅ Nitride Thickness: 3.5kÅ ±1.5kÅ Metallization Mask Layout HA-5004 OE TOI GND TOL V+ IN -BAL FB +BAL V- VC- 8 10K VC+ OUT 100K