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Semiconductor
CT T ODU MEN E PR PLACE -7747 ET OL RE -442 OBS ENDED -800 M ns 1 rris.com M io licat ECO ha January 1999 NO R ntral App entapp@ c e ll C email: Ca or
HA-5004
File Number 2923.4
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. For Military grade product refer to the HA-5004/883 data sheet.
Features
* Slew Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1200V/s * Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mA * Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V into 100 * 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 HA1-5004-5 TEMP. RANGE (oC) 0 to 70 PACKAGE 14 Ld CERDIP PKG. NO. F14.3
TRUTH TABLE INPUTS TEMP TJ Normal High (Note) X X TOL OUTPUT (OPEN COLLECTOR) 1 0 1 0
Pinout
HA-5004 (CERDIP) TOP VIEW
OE 0 0
TOI 0 0 1 X
OPERATION Normal Auto Shutdown, HI-Z OUT Normal Manual Shutdown, HI-Z OUT
VC+ 1 OUT +BAL -BAL 2 3 4
14 VC13 VEE
0 1 NOTE:
+
12 -IN 11 +IN 10 TOL 9 GND 8 N/C
>180oC Typical
VCC 5 TOI OE 6 7
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-800-4-HARRIS or 407-727-9207 | Copyright (c) Harris Corporation 1999
HA-5004
Absolute Maximum Ratings
Supply Voltage (Between V+ and V- Terminals) . . . . . . . . . . . . 40V Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V DC Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSUPPLY Output Current . . . . . . . . . . . . . . . 120mA Max (25% Duty Cycle)
Thermal Information
Thermal Resistance (Typical, Note 2) JA (oC/W) JC (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. JA is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
PARAMETER INPUT CHARACTERISTICS Offset Voltage
VCC = VC+ = +15V, VEE = VC- = -15V, RS = 50, RL = 100, AV = +1, RF = 250, OE = 0.8V, TOI = 0.8V or 2.0V, Unless Otherwise Specified TEST CONDITIONS TEMP. (oC) MIN TYP MAX UNITS
25 Full
10
1 10 2 6.5 3 3 -
5 20 5 20 -
mV mV V/oC A A M pF V
Average Offset Voltage Drift Bias Current (+Input Only) (Note 3)
Full 25 Full
Input Resistance (-Input) Input Resistance (+Input) Input Capacitance Common Mode Range DISTORTION AND NOISE Total Harmonic Distortion (2VP-P, 200kHz) AVCL = +1 AVCL = +2 AVCL = +5 Input Noise Voltage Input Noise Voltage Density (Note 4) 10Hz to 1MHz f = 10kHz f = 100kHz Input Noise Current Density (Note 4) f = 10kHz f = 100kHz DIGITAL I/O CHARACTERISTICS Logic Inputs (OE and TO) VIH VIL IIH at VI = 2.4V IIH at VI = 0.4V Logic Output (TOL) (Open Collector) VOL at 800A
25 25 25 Full
25 25 25 25 25 25 25 25
-
-72 -70 -68 15 2.2 2.2 6 4
-
dBc dBc dBc VP-P nV/Hz nV/Hz pA/Hz pA/Hz
Full Full Full Full Full
2.0 -
0.05
0.8 1 10 0.4
V V A A V
2
HA-5004
Electrical Specifications
PARAMETER TRANSFER CHARACTERISTICS DC Gain Error (Note 5) Small Signal (100mV) Large Signal (10V) (RL = 1k) DC Voltage Gain Small and Large Signal 25 Full 25 Full 25 Full DC Transimpedance (Note 6) 25 Full -3dB Bandwidth (Note 7) Gain Flatness AV = +1 DC to 5MHz DC to 10MHz Differential Gain (Notes 7, 8, 9, 3.58MHz) AVCL = +1 AVCL = +2 Differential Gain (Notes 7, 8, 9, 4.43MHz) AVCL = +1 AVCL = +2 Differential Phase (Notes 7, 8, 3.58MHz) AVCL = +1 AVCL = +2 Differential Phase (Notes 7, 8, 4.43MHz) AVCL = +1 AVCL = +2 Common Mode Rejection Ratio Minimum Stable Gain OUTPUT CHARACTERISTICS Output Voltage Swing RL = 100 RL = 1k RL = 100 RL = 1k Full Power Bandwidth Output Resistance, Open Loop Output Current HI-Z to 2V 2V to HI-Z Disabled AV = +1, VOUT = 4VP-P 25 25 Full Full 25 25 25 Full Output Enable Time Output Disable Time Output Leakage TRANSIENT RESPONSE Rise Time/Fall Time Propagation Delay Slew Rate Settling Time Overshoot POWER SUPPLY CHARACTERISTICS Supply Current Enabled Disabled 25 Full 25 12 7 16 22 mA mA mA 200mV Step 10V Step 10V Step 0.1%, 10V Step 25 25 25 25 25 6.3 7 1200 50 10 ns ns V/s ns % Full Full Full 9.0 11.5 8.0 10.5 90 80 9.5 11.8 9.5 11.8 50 5 100 100 100 3 1 V V V V MHz mA mA ns s A VCM = 10V 25 25 25 25 25 25 25 25 25 25 25 Full Full 233 133 33 1 0.25 0.25 0.25 0.25 400 400 100 100 100 0.03 0.05 0.035 0.058 0.035 0.058 0.15 0.23 0.17 0.24 58 0.43 0.75 0.43 0.75 % % % % V/V V/V V/mA V/mA MHz dB dB % % % % Degrees Degrees Degrees Degrees dB V/V VCC = VC+ = +15V, VEE = VC- = -15V, RS = 50, RL = 100, AV = +1, RF = 250, OE = 0.8V, TOI = 0.8V or 2.0V, Unless Otherwise Specified (Continued) TEST CONDITIONS TEMP. (oC) MIN TYP MAX UNITS
3
HA-5004
Electrical Specifications
PARAMETER Power Supply Rejection Ratio VCC = VC+ = +15V, VEE = VC- = -15V, RS = 50, RL = 100, AV = +1, RF = 250, OE = 0.8V, TOI = 0.8V or 2.0V, Unless Otherwise Specified (Continued) TEST CONDITIONS TEMP. (oC) Full MIN 50 TYP 60 MAX UNITS 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 = -------------------------------------------- x 100% . DC Voltage Gain RF 6. DC Transimpedance = -------------------------- , R F = 250 . Gain Error 7. VIN = 300mVP-P. 8. VOFFSET = 1.0V. 9. Differential Gain (dB) = 0.0869 Differential Gain (%).
Test Circuits and Waveforms
INPUT
VIN
+
249
VOUT
OUTPUT
AV = +1, VSUPPLY = 15V Vertical Scale: 5V/Div.; Horizontal Scale: 20ns/Div. LARGE SIGNAL RESPONSE, AV = +1 FIGURE 1. TEST CIRCUIT
INPUT
INPUT
OUTPUT
OUTPUT
AV = +1, VSUPPLY = 15V Vertical Scale: 2V/Div.; Horizontal Scale: 20ns/Div. PROPAGATION DELAY
AV = +1, VSUPPLY = 15V Vertical Scale: 100mV/Div.; Horizontal Scale: 20ns/Div. SMALL SIGNAL RESPONSE
4
Schematic Diagram
5
BAL1 R24A RT16 QPT10 QPT12 QPT18 QP24 QN2 QP1 QPT17 QPT11 QN20 QP23 RT19 RT6 QPT9 QPT6 RT14 QN21
23 31
TOI
TOL
OE BAL 2 VCC VC+
RT17 RT9 QPT13 QP22 QNT9 QNT11 QNT10 RT18 QPT14 IN QN QN1 DD8 DD6 QP2 QPT15 RT10 DZ1 QN22 QP28 QP25 QNT8 QNT7 R21 QN31 R28 R22A R22B R6 QN32 QN24 QP30 QN3 R20 RXU9 QN30 QN25 QN26 QP32 QP QP3 RT8 RT13 RT15 RT12 R25 R23 R30 R29 R24B R31 R3
RT7
RT4
RT5
R26
R4 QP4 DD1 DD2
R32
R5
RXU2
QPT1
QPT2 QPT3
QPT7
QP5 QN7 R34A QP6 FB QN6A QN6B DD8 CC1 DD3 DD4 QN4 R34B DD7 OUT R35
RT20
QNT12
QPT4
HA-5004
QPT6
QPT5
QNT4
QNT3
R36A R36B
R37 QP7 QN5
QNT6
QNT2
DZT2 DZT1
QNT5
RT1
R27
R7
R8
RT1 GND VEE VC-
HA-5004 Application Information
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. capacitors from each supply to ground are recommended, typically a 0.01F ceramic in parallel with a 4.7F electrolytic.
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, 100 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.
Resistor Selection
The HA-5004 is optimized for a feedback resistor of 250, 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 10k THERMAL OVERLOAD 8 NC 9 GND 10 TOL VIN 11 12 100 -15V 13 VEE 14 VCRF 249 249 + OE 7 TOI 6 VCC 5 4 3 2 100 VC+ 1 +15V
Offset Adjustment
Offset voltage may be nulled with a 5k 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.
+
5k BAL VOUT
-
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
HA-5004 Typical Performance Curves
15 12 GAIN (dB) 9 AV = +2 6 3 AV = +1 PHASE (DEGREES) GAIN (dB) 0 0 45 AV = +1 PHASE AV = +2 AV = +5 1 10 FREQUENCY (MHz) 100 135 180 90 0 -1 -2 -3 -4 -5 -6 1 10 FREQUENCY (MHz) 100 AV = +5
VSUPPLY = 15V, TA = 25oC, Unless Otherwise Specified
AV = 1 INPUT = 300mVP-P
3.5V 15V 10V 5V
FIGURE 3. GAIN AND PHASE vs FREQUENCY
FIGURE 4. FREQUENCY RESPONSE vs SUPPLY VOLTAGE
12 GAIN (dB) 9 6
VCC = 15V, AV = +2 RL = 1k, Input = 10mV
40 35 30 0.0pF 10pF VOUT (VP-P) 25 20 15 10 5 0 1K
VCC = 15V, AV = +1 SINEWAVE INPUT
3 0
50pF 100pF 1 10 FREQUENCY (MHz) 100
10K
100K FREQUENCY (Hz)
1M
10M
FIGURE 5. FREQUENCY RESPONSE vs CL
FIGURE 6. MAXIMUM UNDISTORTED SINEWAVE OUTPUT vs FREQUENCY
10.0
20
1.0
SUPPLY CURRENT (mA)
16
IMPEDANCE ()
12
8
0.1
4
0.01 1K
0 100K FREQUENCY (Hz) 1M 10M 0 2 4 6 8 10 12 SUPPLY VOLTAGE (V) 14 16 18
FIGURE 7. CLOSED LOOP OUTPUT IMPEDANCE vs FREQUENCY
FIGURE 8. SUPPLY CURRENT vs SUPPLY VOLTAGE
7
HA-5004 Typical Performance Curves
8 7 6 eN (nV/Hz) iN (pA/Hz) 5 4 3 2 1 0 10 100 1K FREQUENCY (Hz) 10K 100K
VSUPPLY = 15V, TA = 25oC, Unless Otherwise Specified (Continued)
55 50 45 40 35 30 25 20 15 10 5 0 10 100 1K FREQUENCY (Hz) 10K 100K
VCC = 15V
VCC = 15V
FIGURE 9. NOISE VOLTAGE vs FREQUENCY
FIGURE 10. NOISE CURRENT vs FREQUENCY
Die Characteristics
DIE DIMENSIONS: 63 mils x 93 mils x 19 mils 1600m x 2370m x 483m METALLIZATION: Type: Al, 1% Cu Thickness: 16kA 2kA PASSIVATION: Type: Nitride (Si3N4) over (Silox, 5% Phos.) Silox Thickness: 12kA 2kA Nitride Thickness: 3.5kA 1.5kA SUBSTRATE POTENTIAL (Powered Up): VEE TRANSISTOR COUNT: 64 PROCESS: Bipolar Dielectric Isolation
Metallization Mask Layout
HA-5004
OE
TOI GND TOL
V+ IN FB -BAL +BAL
V-
VC-
VC+
OUT
8

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