HA4-2546883

HA2546/883 July 1994 Wideband Two Quadrant Analog Multiplier (Voltage Output) Description The HA-2546/883 is a monolithic, high speed, two quadrant, analog multiplier constructed in the Intersil Dielectrically Isolated High Frequency Process. The HA-2546/883 has a voltage output with a 30MHz signal bandwidth, 300V/µs slew rate and a 17MHz control input bandwidth. High bandwidth and slew rate make this part an ideal component for use in video systems. The suitability for precision video applications is demonstrated further by the 0.1dB gain flatness at 5MHz, 1.6% multiplication error, -52dB feedthrough and differential inputs with 1.2µA bias currents. The HA-2546/883 also has low differential gain (0.1% typ.) and phase (0.1o typ.) errors. The HA-2546/883 is well suited for AGC circuits as well as mixer applications for sonar, radar, and medical imaging equipment. The voltage output of the HA-2546/883 simplifies many designs by eliminating the current-to-voltage conversion stage required for current output multipliers. Features • This Circuit is Processed in Accordance to MIL-STD883 and is Fully Conformant Under the Provisions of Paragraph 1.2.1. • High Speed Voltage Output. . . . . . . . . . . 300V/µs (Min) • Low Multiplication Error . . . . . . . . . . . . . . . .3.0% (Max) 1.6% (Typ) • Input Bias Currents . . . . . . . . . . . . . . . . . . . . 5µA (Max) 1.2µA (Typ) • Signal Input Feedthrough . . . . . . . . . . . . . . -52dB (Typ) • Wide Signal Bandwidth . . . . . . . . . . . . . . . 30MHz (Typ) • Wide Control Bandwidth . . . . . . . . . . . . . . 17MHz (Typ) • Gain Flatness to 5MHz. . . . . . . . . . . . . . . . 0.10dB (Typ) Applications • Military Avionics • Missile Guidance Systems • Medical Imaging Displays • Video Mixers • Sonar AGC Processors Ordering Information PART NUMBER HA1-2546/883 HA4-2546/883 TEMPERATURE RANGE -55oC to +125oC -55oC to +125oC PACKAGE 16 Lead CerDIP 20 Lead Ceramic LCC • Radar Signal Conditioning • Voltage Controlled Amplifier • Vector Generator Pinouts HA-2546/883 (CERDIP) TOP VIEW VREF HA-2546/883 (CLCC) TOP VIEW GA A 20 GA C 19 18 GA B 17 VX + 16 NC 15 VX 14 V+ 9 V10 VOUT 11 NC 12 VZ + 13 VZ GND 2 REF VREF VYIOB VYIOA VY+ VY 2 3 + 4 5 6 + Y X 15 GA C 14 GA B 13 VX + VYIOB VYIOA NC VY + VY 4 5 6 7 8 3 1 Σ 12 VX 11 V+ +Z V- 7 VOUT 8 + 10 VZ 9 VZ + NC GND 1 16 GA A 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 8-3 Spec Number 511050-883 File Number 2444.1 Specifications HA2546/883 Absolute Maximum Ratings Voltage Between V+ and V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60mA Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +175oC Storage Temperature Range . . . . . . . . . . . . . . -65oC ≤ TA ≤ +150oC ESD Rating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20pF, a 50Ω resistor is recommended between VOUT and VZ+, using VZ+ as the output (See Figure 1). This will prevent the multiplier from going unstable. Power Supply Decoupling Power supply decoupling is essential for high frequency circuits. A 0.01µF high quality ceramic capacitor at each supply pin in parallel with a 1µF tantalum capacitor will provide excellent decoupling. Chip capacitors produce the best results due to the close spacing with which they may be placed to the supply pins minimizing lead inductance. Adjusting Scale Factor A = Output Amplifier Open Loop Gain SF = Scale Factor VX, VY, VZ = Differential Inputs The scale factor is used to maintain the output of the multiplier within the normal operating range of ±5V. The scale factor can be defined by the user by way of an optional external resistor, REXT, and the Gain Adjust pins, Gain Adjust A (GA A), Gain Adjust B (GA B), and Gain Adjust C (GA C). The scale factor is determined as follows: SF = 2, when GA B is shorted to GA C SF ≅ 1.2 REXT, when REXT is connected between GA A and GA C (REXT is in kΩ) SF ≅ 1.2 (REXT + 1.667kΩ), when REXT is connected to GA B and GA C (REXT is in kΩ) The scale factor can be adjusted from 2 to 5. It should be noted that any adjustments to the scale factor will affect the AC performance of the control channel, VX. The normal input operating range of VX is equal to the scale factor voltage. The typical multiplier configuration is shown in Figure 1. The ideal transfer function for this configuration is: VOUT = (VX+ - VX-) (VY+ - VY-) 2 0 + VZ- , when VX ≥ 0V , when VX < 0V The HA-2546 two quadrant multiplier may be configured for many uses. Following are examples of a few typical applications. Spec Number 8-18 511050-883 HA2546 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. Adjusting the scale factor will tailor the control signal, VX, input voltage range to match your needs. Referring to the simplified schematic and looking for the VX input stage, you will notice the unusual design. The internal reference sets up a 1.2mA current sink for the VX differential pair. The control signal applied to this input will be forced across the scale factor setting resistor and set the current flowing in the VX+ side of the differential pair. When the current through this resistor reaches 1.2mA, all the current available is flowing in the one side and full scale has been reached. Normally the 1.67kΩ internal resistor sets the scale factor to 2V when the Gain Adjust pins B and C are connected together, but you may set this resistor to any convenient value using pins 16 (GA A) and 15 (GA C). 1N914 1 REF NC NC NC VY + 2 3 + 4 5 6 V7 8 + Y X 16 NC 15 14 13 Σ 12 11 V+ 10 9 VOUT +Z + 50Ω 10kΩ 0.1µF 1 REF NC NC NC VY + 2 3 + 4 5 6 V7 8 + Y X 16 NC 15 14 13 VX + 10kΩ 5kΩ +15V 20kΩ 0.01µF + HA-5127 3.3V 0.1µF - Σ 12 11 V+ 10 9 VOUT 1K +Z + 50Ω FIGURE 3. AUTOMATIC GAIN CONTROL FIGURE 2A. MULTIPLIER, VOUT = VXVY / 2, SCALE FACTOR = 2V In Figure 3, the HA-2546 is configured in a true Automatic Gain Control or AGC application. The HA-5127, low noise op amp, provides the gain control level to the X input. This level will set the peak output voltage of the multiplier to match the reference level. The feedback network around the HA-5127 provides stability and a response time adjustment for the gain control circuit. 1 REF NC NC NC VY + 2 3 + 4 5 6 V7 8 + Y X 16 4.167K 15 14 NC 13 VX + Σ 12 11 V+ 10 9 VOUT 1K +Z + 50Ω FIGURE 2B. MULTIPLIER, VOUT = VXVY / 5, SCALE FACTOR = 5V Spec Number 8-19 511050-883 HA2546 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. . 1 REF NC NC NC 2 3 + 4 5 6 V7 8 + Y X 16 NC 15 14 13 REF LEVEL 0.000dB 180.000DEG 100 80 60 VOLTAGE GAIN (dB) 40 20 0 -20 -40 -60 -80 -100 1K 10K /DIV 20.000dB 45.000DEG MARKET 1000 000.00Hz MAG (UDF) 56.431dB MARKER 1000 000.000Hz PHASE (UDF) 177.646deg Σ 12 11 V+ 10 9 VGAIN = 0.030V 0.126V 0.4V +Z + 0.902V 135 90 45 0 1M 100K FREQUENCY (Hz) 10M 100M PHASE (DEGREES) 180 HFA0002 VOUT + 5kΩ - FIGURE 4A. VOLTAGE CONTROLLED AMPLIFIER FIGURE 4B. VOLTAGE CONTROLLED AMPLIFIER This multiplier has the advantage over other AGC circuits, in that the signal bandwidth is not affected by the control signal gain adjustment. A wide range of gain adjustment is available with the Voltage Controlled Amplifier configuration shown in Figure 4A. and Figure 4B. Here the gain of the HFA0002 is swept from 20V/ V at a control voltage of 0.902V to a gain of almost 1000V/V with a control voltage of 0.03V. The Video Fader circuit provides a unique function as shown in Figure 5. Here Ch B is applied to the minus Z input in addition to the minus Y input. VMIX will control the percentage of Ch A and Ch B that are mixed together to produce a resulting video image or other signal. Many other applications are possible including division, squaring, square-root, percentage calculations, etc. Please refer to the HA-2556 four quadrant multiplier for additional applications. 1 REF NC NC NC CH A CH B V2 3 + 4 5 6 7 8 + Y X 16 NC 15 14 13 VMIX (0V TO 2V) Σ 12 11 V+ 10 9 VOUT +Z + 50Ω VOUT = Ch B + (Ch A - Ch B) VMIX / Scale Factor Scale Factor = 2 VOUT = All Ch B; if VMIX = 0V VOUT = All Ch A; if VMIX = 2V (Full Scale) VOUT = Mix of Ch A and Ch B; if 0V < VMIX < 2V FIGURE 5. VIDEO FADER Spec Number 8-20 511050-883 HA2546 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: Supply Voltage = ±15V, RLOAD = 1kΩ , CLOAD = 50pF, Unless Otherwise Specified. PARAMETER Multiplication Error Drift Differential Gain Differential Phase Gain Tolerance DC to 5MHz 5MHz to 8MHz 1% Amplitude Error 1% Vector Error THD+N Voltage Noise fO = 10Hz fO = 100Hz fO = 1kHz Common Mode Range SIGNAL INPUT, VY Average Offset Voltage Drift Differential Input Resistance Small Signal Bandwidth (-3dB) Feedthrough VY TRANSIENT RESPONSE Propagation Delay Settling Time CONTROL INPUT, VX Average Offset Voltage Drift Differential Input Resistance Small Signal Bandwidth (-3dB) Feedthrough Common Mode Rejection Ratio VX TRANSIENT RESPONSE Propagation Delay Settling Time VZ CHARACTERISTICS Open Loop Gain Differential Input Resistance OUTPUT CHARACTERISTICS Output Resistance +25oC 1 Ω +25oC +25oC 70 900 dB kΩ VX = 0 to 2V, VY = 5V +25oC +25oC 50 200 ns ns VY = 5V, VX = -1V fO = 100kHz, VY = 0V, VX = 200mVrms VX = 0V to 2V, VY = 5V Full +25oC +25oC +25oC +25oC 10 360 17 -40 80 µV/ oC kΩ MHz dB dB VY = ±5V, VX = 2V +25oC +25oC 25 200 ns ns VX = 2V fO = 5MHz, VX = 0V, VY = 200mVrms Full +25oC +25oC +25oC 45 720 40 -52 µV/ oC KΩ MHz dB fO = 10kHz, VY = 1Vrms, VX = 2V VX = 0V, VY = 0V VX = 2V, VY = 300mVP-P , fO = 3.58MHz VX = 2V, VY = 300mVP-P , fO = 3.58MHz VX = 2V CONDITIONS TEMP Full +25oC +25oC +25oC +25oC +25oC +25oC +25oC +25oC +25oC +25oC +25oC TYP 0.002 0.1 0.1 0.1 0.18 6 260 0.03 400 150 75 ±9 UNITS %/ oC % Degrees dB dB MHz kHz % nV/Hz nV/Hz nV/Hz V 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 8-21 511050-883