HA1-2557883

HA2557/883 July 1994 Wideband Four Quadrant Analog Multiplier (Current Output) Description The HA-2557/883 is a monolithic, high speed, four quadrant, analog multiplier constructed in Intersil’ Dielectrically Isolated High Frequency Process. The single-ended current output of the HA-2557/883 has a 130MHz signal bandwidth (RL = 50Ω). High bandwidth and low distortion make this part an ideal component in video systems. The suitability for precision video applications is demonstrated further by low multiplication error (1.5%), low feedthrough (-52dB), and differential inputs with low bias currents (8µA). The HA-2557/883 is also well suited for mixer circuits as well as AGC applications for sonar, radar, and medical imaging equipment. The current output of the HA-2557/883 allows it to achieve higher bandwidths than voltage output multipliers. Full scale output current is trimmed to 1.6mA. An internal 2500Ω feedback resistor is also provided to accurately convert the current, if desired, to a full scale output voltage of ±4V. The HA-2557/883 is not limited to multiplication applications only; frequency doubling, power detection, as well as many other configurations are also possible. Features • This Circuit is Processed in Accordance to MIL-STD883 and is Fully Conformant Under the Provisions of Paragraph 1.2.1. • Low Multiplication Error . . . . . . . . . . . . . . . . 1.5% (Typ) • Input Bias Currents . . . . . . . . . . . . . . . . . . . . . 8µA (Typ) • Signal Input Feedthrough at 5MHz. . . . . . . -52dB (Typ) • Wide Y Channel Bandwidth . . . . . . . . . . 130MHz (Typ) • Wide X Channel Bandwidth . . . . . . . . . . . 75MHz (Typ) • Rise Time (RL = 50Ω) . . . . . . . . . . . . . . . . . . . . 7ns (Typ) • Supply Current . . . . . . . . . . . . . . . . . . . . . . . 17mA (Max) Applications • Military Avionics • Missile Guidance Systems • Medical Imaging Displays • Video Mixers • Sonar AGC Processors • Radar Signal Conditioning • Voltage Controlled Amplifier • Vector Generator Ordering Information PART NUMBER HA1-2557/883 TEMPERATURE RANGE -55oC to +125oC PACKAGE 16 Lead CerDIP Pinout HA-2557/883 (CERDIP) TOP VIEW GND VREF VYIOB VYIOA VY+ VY VIOUT 1 REF 2 3 4 X 5 Y 6 7 8 X 11 V+ 10 RZ 9 NC 12 VX16 VXIO A 15 VXIOB 14 NC 13 VX+ Schematic V+ VBIAS VBIAS IOUT VX+ VX VY + REF + YY RZ VXIO A VXIOB GND VYIO A VYIOB V- CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999 Spec Number 8-12 511064-883 File Number 3638 Specifications HA2557/883 Absolute Maximum Ratings Voltage Between V+ and V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±3mA ESD Rating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 2000V Lead Temperature (Soldering 10s) . . . . . . . . . . . . . . . . . . . . +300oC Storage Temperature Range . . . . . . . . . . . . . . -65oC ≤ TA ≤ +150oC Max Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . +175oC Thermal Information Thermal Resistance θJA θJC CerDIP Package . . . . . . . . . . . . . . . . . . . . 82oC/W 27oC/W Maximum Package Power Dissipation at +75oC CerDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.22W Package Power Dissipation Derating Factor above +75oC CerDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12mW/oC 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. Operating Conditions Operating Supply Voltage (±VS) . . . . . . . . . . . . . . . . . . . . . . . . . . ±15V Operating Temperature Range . . . . . . . . . . . . -55oC ≤ TA ≤ +125oC TABLE 1. DC ELECTRICAL PERFORMANCE CHARACTERISTICS Device Tested at: VSUPPLY = ±15V, RZ (Pin 10) not connected, Unless Otherwise Specified. PARAMETERS Multiplication Error SYMBOL ME CONDITIONS VY, VX = ±4V FS = 1.6mA VY, VX = ±4V Nominal 2500Ω VX, VY = 0V VY = ±4V VX = 0V, VY = 4V VX = 0V, VY = 4V VXCM = ±10V VY = 4V V+ = +12V to +17V VY = 4V V- = -12V to -17V VY = 4V VX = ±4V VY = 0V, VX = 4V VY = 0V, VX = 4V VYCM = +9V, -10V VX = 4V V+ = +12V to +17V VX = 4V V- = -12V to -17V VX = 4V VX, VY = 0V VOUT = ±10V GROUP A SUBGROUPS 1 2, 3 1 1 2, 3 IOUT Offset Input Offset Voltage (VX) Input Bias Current (VX) Input Offset Current (VX) Common Mode (VX) Rejection Ratio Power Supply (VX) Rejection Ratio IOO VXIO IB(VX) IIO(VX) CMRR(VX) + PSRR(VX) - PSRR(VX) Input Offset Voltage (VY) Input Bias Current (VY) Input Offset Current (VY) Common Mode (VY) Rejection Ratio Power Supply (VY) Rejection Ratio VYIO IB(VY) IIO(VY) CMRR(VY) + PSRR(VY) - PSRR(VY) Supply Current ICC ZOUT 1 2, 3 1 2, 3 1 2, 3 1 2, 3 1 2, 3 1 2, 3 1 2, 3 1 2, 3 1 2, 3 1 2, 3 1 2, 3 1 2, 3 1 2, 3 1 2, 3 Output Impedance 1 LIMITS TEMPERATURE +25oC +125o C, -55 C o MIN -3 -6 -0.25 -3 -5 -10 -15 -15 -25 -15 -25 -2 -3 65 65 65 65 45 45 -15 -25 -15 -25 -2 -3 65 65 65 65 45 45 1.0 MAX 3 6 0.25 3 5 10 15 15 25 15 25 2 3 15 25 15 25 2 3 17 17 - UNITS %FS %FS %FS % % µA µA mV mV µA µA µA µA dB dB dB dB dB dB mV mV µA µA µA µA dB dB dB dB dB dB mA mA MΩ Linearity Error RZ Accuracy LE RZE +25oC +25oC +125oC, -55oC +25 C +125oC, -55oC +25 C +125oC, -55oC +25oC +125 oC, o o -55oC +25oC +125oC, -55oC +25oC +125 oC, -55oC +25oC +125oC, -55oC +25oC +125oC, -55oC +25oC +125oC, -55oC +25oC +125oC, -55oC +25oC +125oC, -55oC +25oC +125 oC, -55oC -55oC -55oC +25oC +125 oC, +25oC +125 oC, +25oC +125oC, -55oC +25oC Spec Number 8-13 511064-883 HA2557/883 TABLE 2. AC ELECTRICAL PERFORMANCE CHARACTERISTICS Table 2 Intentionally Left Blank. See AC Specifications in Table 3 TABLE 3. ELECTRICAL PERFORMANCE CHARACTERISTICS Device Tested at: VSUPPLY = ±15V, RZ (Pin 10) not connected, Unless Otherwise Specified. LIMITS PARAMETERS VY, CHARACTERISTICS Bandwidth AC Feedthrough BW(VY) VISO -3dB, VX = 4V, VY ≤ 200mVP-P fO = 5MHz, VY = 200mVP-P VX = Nulled VY = -4V to +4V Step VX = 4V, 10% to 90% pts VY = -4V to +4V Step VX = 4V VY = ±4V, VX = 0V 1 1, 2 +25oC +25oC 90 -48 MHz dB SYMBOL CONDITIONS NOTES TEMPERATURE MIN MAX UNITS Rise and Fall Time TR, TF 1 +25oC - 10 ns Overshoot Differential Input Resistance VX CHARACTERISTICS Bandwidth AC Feedthrough +OS, -OS RIN(VY) 1 1 +25oC +25oC 650 10 - % kΩ BW(VX) VISO -3dB, VY = 4V, VX ≤ 200mVP-P fO = 5MHz, VX = 200mVP-P VY = Nulled VX = -4V to +4V Step VY = 4V, 10% to 90% pts VX = -4V to +4V Step VY = 4V VX = ±4V, VY = 0V 1 1, 2 +25oC +25oC 60 - -50 MHz dB Rise and Fall Time Overshoot Differential Input Resistance NOTE: TR, TF +OS, -OS RIN(VX) 1 1 1 +25oC +25oC +25oC 650 10 15 - ns % kΩ 1. Parameters listed in Table 3 are controlled via design or process parameters and are not directly tested at final production. These parameters are lab characterized upon initial design release, or upon design changes. These parameters are guaranteed by characterization based upon data from multiple production runs which reflect lot to lot and within lot variation. 2. Offset voltage applied to minimize feedthrough signal. TABLE 4. ELECTRICAL TEST REQUIREMENTS MIL-STD-883 TEST REQUIREMENTS Interim Electrical Parameters (Pre Burn-In) Final Electrical Test Parameters Group A Test Requirements Groups C and D Endpoints NOTE: 1. PDA applies to Subgroup 1 only. SUBGROUPS (SEE TABLE 1) 1 (Note 1), 2, 3 1, 2, 3 1 Spec Number 8-14 511064-883 HA2557/883 Die Characteristics DIE DIMENSIONS: 71mils x 100mils x 19mils ± 1mils METALLIZATION: Type: Al, 1% Cu Thickness: 16kÅ ± 2kÅ GLASSIVATION: Type: Nitride (Si3N4) over Silox (SiO2, 5% Phos) Silox Thickness: 12kÅ ± 2kÅ Nitride Thickness: 3.5kÅ ± 1.5kÅ TRANSISTOR COUNT: 72 SUBSTRATE POTENTIAL: VWORST CASE CURRENT DENSITY: 0.47 x 105A/cm2 Metallization Mask Layout HA-2557/883 (16) VXIOA VYIOB (3) VYIOA (4) (15) VXIOB (13) VX+ (12) VX (11) V+ RZ (10) (2) VREF VY+ (5) VY - (6) (1) GND IOUT (8) V- (7) Spec Number 8-15 511064-883 HA2557/883 Test Circuits VY TRANSIENT RESPONSE Vertical Scale: Top 5V/Div. Bottom: 100mV/Div. Horizontal Scale: 20ns/Div. 1 REF NC NC NC VY + 2 3 4 X 5 Y 6 -15V 7 8 VOUT 50Ω X 11 10 9 +15V NC NC 12 16 15 14 13 NC NC NC VX+ FIGURE 1. AC AND TRANSIENT RESPONSE TEST CIRCUIT Burn-In Circuit HA-2557/883 CERAMIC DIP 1 REF NC NC NC VY+ 2 3 4 X 5 Y 6 - 15.5V ±0.5V D1 0.01µF IOUT 7 8 X 16 15 14 13 12 11 10 9 NC NC NC VX+ RZ NC +15.5 V ±0.5V D2 0.01µF D1 = D2 = 1N4002 OR EQUIVALENT (PER BOARD) Spec Number 8-16 511064-883 HA2557/883 Packaging c1 -A-DBASE METAL E b1 M -Bbbb S BASE PLANE SEATING PLANE S1 b2 b ccc M C A-B S AA C A-B S D Q -CA L DS M (b) SECTION A-A (c) LEAD FINISH F16.3 MIL-STD-1835 GDIP1-T16 (D-2, CONFIGURATION A) 16 LEAD DUAL-IN-LINE FRIT-SEAL CERAMIC PACKAGE INCHES SYMBOL A b b1 b2 b3 c c1 MIN 0.014 0.014 0.045 0.023 0.008 0.008 0.220 MAX 0.200 0.026 0.023 0.065 0.045 0.018 0.015 0.840 0.310 MILLIMETERS MIN 0.36 0.36 1.14 0.58 0.20 0.20 5.59 MAX 5.08 0.66 0.58 1.65 1.14 0.46 0.38 21.34 7.87 2.54 BSC 7.62 BSC 3.81 BSC 3.18 0.38 0.13 0.13 90o 16 5.08 1.52 105o 0.38 0.76 0.25 0.038 NOTES 2 3 4 2 3 5 5 6 7 2 8 α eA D E e eA eA/2 L Q 0.100 BSC 0.300 BSC 0.150 BSC 0.125 0.015 0.005 0.005 90o 16 0.200 0.060 105o 0.015 0.030 0.010 0.0015 e DS eA/2 c aaa M C A - B S D S NOTES: 1. Index area: A notch or a pin one identification mark shall be located adjacent to pin one and shall be located within the shaded area shown. The manufacturer’s identification shall not be used as a pin one identification mark. 2. The maximum limits of lead dimensions b and c or M shall be measured at the centroid of the finished lead surfaces, when solder dip or tin plate lead finish is applied. 3. Dimensions b1 and c1 apply to lead base metal only. Dimension M applies to lead plating and finish thickness. 4. Corner leads (1, N, N/2, and N/2+1) may be configured with a partial lead paddle. For this configuration dimension b3 replaces dimension b1. 5. This dimension allows for off-center lid, meniscus, and glass overrun. 6. Dimension Q shall be measured from the seating plane to the base plane. 7. Measure dimension S1 at all four corners. 8. N is the maximum number of terminal positions. 9. Dimensioning and tolerancing per ANSI Y14.5M - 1982. 10. Controlling Dimension: Inch. 11. Lead Finish: Type A. 12. Materials: Compliant to MIL-M38510. S1 S2 α aaa bbb ccc M N Spec Number 8-17 511064-883 Semiconductor HA2557 Wideband Four Quadrant Current Output Analog Multiplier VX BANDWIDTH -32 DESIGN INFORMATION August 1999 The information contained in this section has been developed through characterization by Intersil Semiconductor and is for use as application and design information only. No guarantee is implied. Typical Performance Curves VY BANDWIDTH -32 GAIN (dB) -37 GAIN (DB) -3dB AT 77MHz -37 IOUT INTO 50Ω VY BANDWIDTH VY = 200MVP-P , VX = 4VDC -42 1M 10M FREQUENCY (Hz) -3dB at 131MHz IOUT INTO 50Ω VX BANDWIDTH VX = 200mVP-P VY = 4VDC -42 1M 10M FREQUENCY (Hz) 100M 100M HA2557 INTO HA2842 AS I TO V CONVERTER VY FULLPOWER BANDWIDTH 4 2 GAIN (dB) 0 -2 -4 -6 1K -3dB at 24.4MHz INTERNAL RX AS FEEDBACK RESISTOR, PLUS 3pF COMPENSATION CAPACITOR VY = 3.5VP-P , VX = 4VDC VY TRANSIENT RESPONSE OF HA-2842 AS I TO V CONVERTER Top: VY Input 0 to 4V Step Bottom: HA-2842 0 to 4V Response 10K 100K 1M 10M 100M FREQUENCY (Hz) Spec Number 8-18 511064-883 HA2557 DESIGN INFORMATION (Continued) The information contained in this section has been developed through characterization by Intersil Semiconductor and is for use as application and design information only. No guarantee is implied. Typical Performance Curves DRIVING HA5023 AS I TO V CONVERTER VY BANDWIDTH 4 FIRST STAGE USING A 909Ω FEEDBACK RESISTOR, OUTPUT OF SECOND STAGE (AMP 2) WITH 619Ω FEEDBACK RESISTOR AND 220Ω GAIN RESISTOR IN PARALLEL WITH A 10pF 2 PLUS 220Ω , VY = 200mVP-P, VX = 4VDC GAIN (dB) 0 -2 -4 1M 10M FREQUENCY (Hz) 100M -3dB at 94MHz VY TRANSIENT RESPONSE OF HA5023 AS I TO V CONVERTER Top: VY Input 0 to 4V Step Bottom: HA5023 0 to 4V Response DRIVING HA5023 AS I TO V CONVERTER VX BANDWIDTH FIRST STAGE USING A 909Ω FEEDBACK RESISTOR, OUTPUT OF SECOND STAGE (AMP 2) WITH 619Ω FEEDBACK RESISTOR AND 220Ω GAIN RESISTOR IN PARALLEL WITH A 2 10pF PLUS 220Ω , VX = 200mVP-P , VY = 4VDC 4 GAIN (dB) 0 -2 -4 1M 10M FREQUENCY (Hz) 100M -3dB at 98MHz VY TRANSIENT RESPONSE OF HA5023 AS I TO V CONVERTER Top: VX Input 0 to 4V Step Bottom: HA5023 0 to 4V Response DRIVING HA5023 AS I TO V CONVERTER VY FULLPOWER BANDWIDTH FIRST STAGE USING A 909Ω FEEDBACK RESISTOR OUTPUT OF SECOND STAGE (AMP 2) WITH 619Ω FEEDBACK RESISTOR AND 220Ω GAIN RESISTOR IN PARALLEL WITH A 10pF 2 PLUS 220Ω , VY = 3.5VP-P , VX = 4VDC 4 GAIN (dB) GAIN (dB) 0 -2 -4 1M 10M FREQUENCY (Hz) 100M -3dB at 80MHz DRIVING HA5023 AS I TO V CONVERTER VX FULLPOWER BANDWIDTH FIRST STAGE USING A 909Ω FEEDBACK RESISTOR OUTPUT OF SECOND STAGE (AMP 2) WITH 619Ω FEEDBACK RESISTOR AND 220Ω GAIN RESISTOR IN PARALLEL WITH A 10pF 2 PLUS 220Ω , VX = 3.5VP-P , VY = 4VDC 4 0 -2 -4 1M 10M FREQUENCY (Hz) 100M -3dB at 80MHz Spec Number 8-19 511064-883 HA2557 DESIGN INFORMATION (Continued) The information contained in this section has been developed through characterization by Intersil Semiconductor and is for use as application and design information only. No guarantee is implied. Typical Performance Curves INPUT BIAS CURRENT 14 13 12 BIAS CURRENT (µA) 11 10 9 8 7 6 5 4 -100 -50 0 50 TEMPERATURE (oC) 100 150 OFFSET VOLTAGE (mV) 7 6 5 4 3 2 1 0 -100 |VIOY| -50 0 50 TEMPERATURE (oC) 100 150 |VIOX| ABSOLUTE VALUE OFFSET VOLTAGE SCALE FACTOR ERROR 2 INPUT VOLTAGE RANGE (V) 1.5 1 0.5 0 -0.5 -1 -100 6 INPUT VOLTAGE RANGE SCALE FACTOR ERROR (%) 5 X INPUT 4 Y INPUT 3 2 1 -50 0 50 TEMPERATURE (oC) 100 150 4 6 8 10 12 14 16 ±SUPPLY VOLTAGE (V) INPUT COMMON MODE RANGE 15 10 X INPUT 5 CMR (V) 0 -5 X AND Y INPUT -10 -15 Y INPUT 4 6 8 10 12 ±SUPPLY VOLTAGE (V) 14 16 Spec Number 8-20 511064-883 HA2557 DESIGN INFORMATION (Continued) The information contained in this section has been developed through characterization by Intersil Semiconductor and is for use as application and design information only. No guarantee is implied. Applications Information Operation at Reduced Supply Voltages The HA-2557 will operate over a range of supply voltages, ±5V to ±15V. Use of supply voltages below ±12V will reduce input and output voltage ranges. See “Typical Performance Curves” for more information. Offset Adjustment The channel offset voltage may be nulled by using a 20K potentiometer between the VYIO or VXIO adjust pin A and B and connecting the wiper to V-. Reducing the channel offset voltage will reduce AC feedthrough and improve the multiplication error. products where one input was dedicated to a slow moving control function as is required for Automatic Gain Control. The HA-2557 is versatile enough for both. ACOS(ωΑτ) AUDIO VX+ + - VX1/10kVΩ CCOS(ωCτ) VY+ CARRIER VYI OUT + X X Y RZ IOUT Theory of Operation The HA-2557 creates an output current that is the product of the X and Y input voltages divided by a constant scale factor of 10kVΩ. The resulting output has the correct polarity in each of the four quadrants defined by the combinations of positive and negative X and Y inputs. This results in the following equation, where X and Y are high impedance differential inputs: I OUT XxY = -----------10kV Ω - = -------------- ( Cos ( ω C – ω A ) τ + Cos ( ω C + ω A ) τ ) 20kV Ω AC FIGURE 2. AM SIGNAL GENERATION VX + AM SIGNAL VX + - To accomplish this the differential input voltages are first converted into differential currents by the X and Y input transconductance stages. The currents are then scaled by a constant reference and combined in the multiplier core. The multiplier core is a basic Gilbert Cell that produces a differential output current proportional to the product of X and Y input signal currents. This current is converted into the output for the HA-2557. The purpose of the reference circuit is to provide a stable current, used in setting the scale factor. This is achieved with a bandgap reference circuit to produce a temperature stable voltage of 1.2V which is forced across a NiCr resistor. Slight adjustments to scale factor may be possible by overriding the internal reference with the VREF pin. The scale factor is used to maintain the output of the multiplier within the normal operating range of ±1.6mA when full scale inputs are applied. X X Y RZ IOUT 1/10KVΩ CARRIER VY + + - VY LIKE THE FREQUENCY DOUBLER YOU GET AUDIO CENTERED AT DC AND 2FC . FIGURE 3. SYNCHRONOUS AM DETECTION ACOS(ωτ) VX+ + VX - - X IOUT X Y RZ Communications The multiplier function of the HA-2557 has applications in AM Signal Generation, Synchronous AM Detection and Phase Detection. These circuit configurations are shown in Figure 2, Figure 3 and Figure 4. By feeding a signal into both X and Y inputs a Square function results that is useful as a Frequency Doubler as shown in Figure 5. The HA-2557 is particularly useful in applications that require the interaction of high speed signals. Both inputs X and Y have similar wide bandwidth and input characteristics. This is unlike earlier 1/10kVΩ ACOS(ωτ+φ) VY+ VY 2 + - I OUT A = -------------- ( Cos ( φ ) + Cos ( 2 ωτ + φ ) ) 20kV Ω DC COMPONENT IS PROPORTIONAL TO COS(Φ) FIGURE 4. PHASE DETECTION Spec Number 8-21 511064-883 HA2557 DESIGN INFORMATION (Continued) The information contained in this section has been developed through characterization by Intersil Semiconductor and is for use as application and design information only. No guarantee is implied. ACOS(ωτ) VX + + VX 1 X IOUT X Y RZ VY REF NC NC NC 0.01µ 2 3 4 X 5 Y 6 7 IOUT 2 8 3pF RZ X 2.5K 11 10 9 NC 1.0µ +15V 16 NC 15 NC 14 NC VX 13 0.01µ 12 - 1/10KVΩ VY + VY + - ( ACos ( ωτ ) × ACos ( ωτ ) ) = WHICH EVALUATES TO: I OUT A = -------- ( 1 + Cos ( 2 ωτ ) ) 20K 10kV Ω ( I OUT ) -15V 1.0µ FIGURE 5. FREQUENCY DOUBLER + - VOUT HA-2842 Although the X and Y inputs have similar AC characteristics, they are not the same. The designer should consider input parameters such as small signal bandwidth and ac feedthrough to get the most performance from the HA-2557. The Y channel is the faster of the two inputs with a small signal bandwidth of typically 130MHz verses 75MHz for the X channel. Therefore in AM Signal Generation, the best performance will be obtained with the Carrier applied to the Y channel and the modulation signal (lower frequency) applied to the X channel. 10kΩ 1N914 10kΩ 5kΩ +15V 0.01µF + 0.1µF - HA-5127 20kΩ 0.1µF 5.6V Operation Over a Wide Supply Range The HA-2557 is able to operate over a wide supply voltage range ±5V to ±17.5V. The ±5V range is particularly useful in video applications. At ±5V the input voltage range is reduced to ±1.4V limiting the fullscale output current. Another current output option is the HA-2556 voltage output multiplier configured for current output with an output sensing resistor (Refer to the HA-2556 datasheet). FIGURE 6. AUTOMATIC GAIN CONTROL This multiplier has the advantage over other AGC circuits, in that the signal bandwidth is not affected by the control signal gain adjustment. Automatic Gain Control Figure 6 shows the HA-2557 configured in an Automatic Gain Control or AGC application. The HA-2842 serves as an output I to V converter using RZ which is trimmed to provide an accurate 4V Fullscale conversion. Refer to Voltage Output Conversion for more details about this function. The HA-5127 low noise amplifier provides the gain control signal to the X input. This control signal sets the peak output voltage of the multiplier to match the preset reference level. The feedback network around the HA-5127 provides a response time adjustment. High frequency changes in the peak are rejected as noise or the desired signal to be transmitted. These signals do not indicate a change in the average peak value and therefore no gain adjustment is needed. Lower frequency changes in the peak value are given a gain of -1 for feedback to the control input. At DC the circuit is an integrator automatically compensating for offset and other constant error terms. Voltage Output Conversion The HA-2842 is an excellent choice to perform the output current to voltage conversion as shown in Figure 7. The combination of 400V/µs slew rate and 80MHz Gain Bandwidth product will maintain signal dynamics while providing a full scale ±4V output. The HA-2842 also provides a hefty output drive capability of 100mA. This voltage feedback amplifier takes advantage of the internal RZ resistor, trimmed to provide an accurate 4V fullscale conversion. The parasitic capacitance at the negative input of the HA-2842 must be compensated with a 3pF capacitor from pin 2 to pin 6. This compensation will also insure that the amp will see a noise gain of 2 at its crossover frequency, the minimum required for stability with this device. The full power bandwidth curve and large signal pulse response for this circuit are shown in Typical Performance Curves. The fast slew rate of the HA-2842 results in a minimal reduction of bandwidth for large signals. Spec Number 8-22 511064-883 HA2557 DESIGN INFORMATION (Continued) The information contained in this section has been developed through characterization by Intersil Semiconductor and is for use as application and design information only. No guarantee is implied. Another choice for an I to V converter that takes better advantage of the wide bandwidth of the HA-2557, is to use the HA5023 Dual 100MHz current feedback amp. The optimum bandwidth of a current feedback amp is obtained with a fixed feedback resistor. Therefore scaling the I to V conversion to a convenient value requires two stages. Fortunately the HA5023 provides two wideband amplifiers in a single 8 pin Mini-DIP or SOIC package, while their current feedback architecture provides signal gain with minimal reduction in bandwidth. This circuit configuration is shown in Figure 8. The optimum bandwidth is achieved in stage 1 with a 909Ω feedback resistor. This voltage is then gained up by the second stage to provide a ±4V Fullscale Voltage output with a bandwidth in excess of 90MHz. The 10pF capacitor and the additional 220Ω resistor improve gain flatness and reduce gain peaking. The HA5023 also provides excellent Full Power Bandwidth (-3dB at 80MHz for a 3.5VP-P signal). Refer to Typical Performance Curves for more information. 1 REF NC NC NC VY 0.01µ 2 3 4 X 5 Y 6 7 8 3pF 2 HA-2842 3 RZ X 2.5K 16 NC 15 NC 14 NC 13 12 11 10 9 NC IOUT 0.01µ VX VY 1.0µ +15V -15V NC NC NC 0.01µ 1 REF 2 3 4 X 5 Y 6 2.5K 1.0µ 7 RZ 8 10pF 220Ω 6 5 X 16 NC 15 NC 14 NC 13 12 11 10 NC 9 NC 619Ω 2 of 2 0.01µ VX 1.0µ +15V -15V 1.0µ IOUT 909Ω 6 0.01µ 1.0µ 0.01µ 1.0µ 2 HA5023 3 (1/2) 8 + - VOUT + 4 - 1 of 2 1 220Ω 0.01µ 1.0µ 0.01µ 1.0µ + HA5023 (1/2) - 8 VOUT +15V -15V +15V -15V FIGURE 7. VOLTAGE OUTPUT CONVERSION FIGURE 8. VOLTAGE OUTPUT CONVERSION Spec Number 8-23 511064-883 HA2557 DESIGN INFORMATION (Continued) The information contained in this section has been developed through characterization by Intersil Semiconductor and is for use as application and design information only. No guarantee is implied. TYPICAL PERFORMANCE CHARACTERISTICS Device Tested at VSUPPLY = 15V, RZ (Pin 10) Not Connected, Unless Otherwise Specified. PARAMETERS Multiplication Error SYMBOL ME CONDITIONS VY, VX = ±4V TEMPERATURE +25oC +125oC, -55oC Multiplication Error Drift Linearity Error METC LE3V LE4V Scale Factor Voltage Noise SF EN(1kHz) EN(100kHz) Positive Power Supply Rejection Ratio +PSRR f = 1kHz, VX = 0V, VY = 0V f = 100kHz, VX = 0V, VY = 0V VS+ = +12V to +15V, VS - = -15V VY, VX = ±4V VY, VX = ±3V VY, VX = ±4V +125oC, -55oC +25oC +25oC +25oC +25oC +25oC +25oC +125oC, -55oC +25oC +125oC, -55oC +25oC +125oC, -55oC INPUT CHARACTERISTICS Input Offset Voltage VIO VY = ±4V +25oC +125oC, -55oC Input Offset Voltage Drift Input Bias Current VIOTC IB VY = ±4V VX = 0V, VY = 4V +125oC, -55oC +25oC +125oC, -55oC Input Offset Current IIO VX = 0V, VY = 4V +25oC +125oC, -55oC Differential Input Range +25oC ±4 ±8 ±35 ±8 ±12 ±0.5 ±1.0 ±4 mV mV µV/oC µA µA µA µA V TYPICAL ±1.5 ±3.0 ±0.003 ±0.02 ±0.05 10 150 40 80 80 55 55 13 13 UNITS %FS %FS %FS/oC %FS %FS kVΩ nV/√Hz nV/√Hz dB dB dB dB mA mA Negative Power Supply Rejection Ratio -PSRR VS - = -12V to -15V, VS+ = +15V Supply Current ICC VX, VY = 0V Spec Number 8-24 511064-883 HA2557 DESIGN INFORMATION (Continued) The information contained in this section has been developed through characterization by Intersil Semiconductor and is for use as application and design information only. No guarantee is implied. TYPICAL PERFORMANCE CHARACTERISTICS Device Tested at VSUPPLY = 15V, RZ (Pin 10) Not Connected, Unless Otherwise Specified. PARAMETERS VY CHARACTERISTICS Bandwidth AC Feedthrough BW(VY) VISO(5MHz) -3dB, VX = 4V, VY ≤ 200mVP-P fO = 5MHz, VY = 200mVP-P VX = Nulled (Note 1) VY = -4V to +4V Step, VX = 4V, 10% to 90% pts VY = ±4V, VX = 0V +25oC +25oC 130 -52 MHz dB SYMBOL CONDITIONS TEMPERATURE TYPICAL UNITS Rise and Fall Time TR, TF +25oC 7 ns Differential Input Resistance VX CHARACTERISTICS Bandwidth RIN(VY) +25oC 1 MΩ BW(VX) -3dB, VY = 4V, VX ≤ 200mVP-P fO = 5MHz, VX = 200mVP-P VY = nulled (Note 1) VX = -4V to +4V step, VY = 4V, 10% to 90% pts VX = ±4V, VY = 0V +25oC 75 MHz AC Feedthrough VISO(5MHz) +25oC -54 dB Rise and Fall Time TR, TF +25oC 7 ns Differential Input Resistance OUTPUT CHARACTERISTICS Output Offset Current RIN(VX) +25oC 1 MΩ IOO VX, VY = 0V +25oC +125oC, -55oC 2.4 5.6 ±1.6 1.5 6.5 µA µA mA MΩ pF Full Scale Output Current Output Resistance Output Capacitance NOTE: IOUTFS ZOUT COUT VX, VY = ±4V VOUT = ±10V +25oC +25oC +25oC 1. Offset voltage applied to minimize feedthrough signal. All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification. Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see web site http://www.intersil.com Spec Number 8-25 511064-883