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HA4201
Data Sheet September 1998 File Number 3680.4
480MHz, 1 x 1 Video Crosspoint Switch with Tally Output
The HA4201 is a very wide bandwidth 1 x 1 crosspoint switch ideal for professional video switching, HDTV, computer monitor routing, and other high performance applications. The circuit features very low power dissipation (105mW Enabled, 1mW Disabled), excellent differential gain and phase, and very high off isolation. When disabled, the output is switched to a high impedance state, making the HA4201 ideal for routing matrix equipment. The HA4201 requires no external current source, and features fast switching and symmetric slew rates. The tally output is an open collector PNP transistor to VCC , and is activated whenever EN = 1 to provide an indication of crosspoint selection. For applications which don't require a Tally output, please refer to the HA4600 data sheet.
Features
* Low Power Dissipation . . . . . . . . . . . . . . . . . . . . . 105mW * Symmetrical Slew Rates . . . . . . . . . . . . . . . . . . 1700V/s * 0.1dB Gain Flatness. . . . . . . . . . . . . . . . . . . . . . . 250MHz * Off Isolation (100MHz) . . . . . . . . . . . . . . . . . . . . . . . 85dB * Differential Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.01% * Differential Phase . . . . . . . . . . . . . . . . . . . . 0.01 Degrees * High ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . >1800V * TTL Compatible Enable Input * Open Collector Tally Output * Improved Replacement for GX4201
Applications
* Professional Video Switching and Routing * Video Multiplexers
Pinout
HA4201 (SOIC) TOP VIEW
* HDTV * Computer Graphics * RF Switching and Routing
EN VV+ OUT
1 2 3 4
8 GND 7 IN 6 NC 5 TALLY
* PCM Data Routing
Ordering Information
PART NUMBER (BRAND) HA4201CB (H4201CB) TEMP. RANGE (oC) 0 to 70 0 to 70 PACKAGE 8 Ld SOIC 8 Ld SOIC Tape and Reel PKG. NO. M8.15 M8.15
Truth Table
EN 0 1 OUT High Z Active TALLY Off On
HA4201CB96 (H4201CB)
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Copyright (c) Intersil Corporation 1999
HA4201
Absolute Maximum Ratings
Voltage Between V+ and V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSUPPLY Digital Input Current (Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . 25mA Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA ESD Rating Human Body Model (Per MIL-STD-883 Method 3015.7) . . . . 1800V
Thermal Information
Thermal Resistance (Typical, Note 1) JA (oC/W) SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 Maximum Junction Temperature (Die) . . . . . . . . . . . . . . . . . . . 175oC Maximum Junction Temperature (Plastic Package) . . . . . . . 150oC Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC (SOIC - Lead Tips Only)
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to 70oC
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. JA is measured with the component mounted on an evaluation PC board in free air. 2. If an input signal is applied before the supplies are powered up, the input current must be limited to this maximum value.
Electrical Specifications
PARAMETER
VSUPPLY = 5V, RL = 10k, VEN = 2.0V, Unless Otherwise Specified TEST CONDITIONS TEMP. (oC) MIN TYP MAX UNITS
DC SUPPLY CHARACTERISTICS Supply Voltage Supply Current (VOUT = 0V) VEN = 2.0V VEN = 2.0V VEN = 0.8V VEN = 0.8V ANALOG DC CHARACTERISTICS Output Voltage Swing without Clipping VOUT = VIN VIO 20mV 25, 70 0 Output Current Input Bias Current Output Offset Voltage Output Offset Voltage Drift (Note 3) SWITCHING CHARACTERISTICS Turn-On Time Turn-Off Time DIGITAL DC CHARACTERISTICS Input Logic High Voltage Input Logic Low Voltage EN Input Current Tally Output High Voltage Tally Off Leakage Current AC CHARACTERISTICS Insertion Loss -3dB Bandwidth 1VP-P RS = 82, CL = 10pF RS = 43, CL = 15pF RS = 36, CL = 21pF 25 25 Full 0.04 480 380 370 0.05 dB MHz MHz MHz VEN = 0 to 4V IOH = 1mA VTALLY = 0V, -5V Full Full Full Full Full 2 -2 4.7 -20 4.8 0.8 2 20 V V A V A 25 25 160 320 ns ns Full Full 25 Full 2.7 2.4 15 -10 2.8 2.5 20 30 25 50 10 50 V V mA A mV V/oC Full 25, 70 0 25, 70 0 4.5 5.0 10.5 100 100 5.5 13 14.5 115 125 V mA mA A A
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HA4201
Electrical Specifications
PARAMETER 0.1dB Flat Bandwidth VSUPPLY = 5V, RL = 10k, VEN = 2.0V, Unless Otherwise Specified (Continued) TEST CONDITIONS RS = 82, CL = 10pF RS = 43, CL = 15pF RS = 36, CL = 21pF Input Resistance Input Capacitance Enabled Output Resistance Disabled Output Capacitance Differential Gain Differential Phase Off Isolation Slew Rate (1.5VP-P, +SR/-SR) VEN = 0.8V 4.43MHz, Note 3 4.43MHz, Note 3 1VP-P, 100MHz, VEN = 0.8V, RL = 10 RS = 82, CL = 10pF RS = 43, CL = 15pF RS = 36, CL = 21pF Total Harmonic Distortion (Note 3) Disabled Output Resistance NOTE: 3. This parameter is not tested. The limits are guaranteed based on lab characterization, and reflect lot-to-lot variation. TEMP. (oC) 25 25 25 Full Full Full Full 25 25 Full 25 25 25 Full Full MIN 200 TYP 250 175 170 400 1.0 15 2.0 0.01 0.01 85 1750/1770 1460/1360 1410/1360 0.01 12 MAX 0.02 0.02 0.1 UNITS MHz MHz MHz k pF pF % Degrees dB V/s V/s V/s % M
AC Test Circuit
400 510 75 VOUT HFA1100 CX 10k
Application Information
General
500
HA4201 RS VIN 75 +
-
NOTE: CL = CX + Test Fixture Capacitance.
PC Board Layout
The frequency response of this circuit depends greatly on the care taken in designing the PC board. The use of low inductance components such as chip resistors and chip capacitors is strongly recommended, while a solid ground plane is a must! Attention should be given to decoupling the power supplies. A large value (10F) tantalum in parallel with a small value (0.1F) chip capacitor works well in most cases. Keep input and output traces as short as possible, because trace inductance and capacitance can easily become the performance limiting items.
The HA4201 is a 1 x 1 crosspoint switch that is ideal for the matrix element in small, high input-to-output isolation switchers and routers. It also excels as an input buffer for routers with a large number of outputs (i.e. each input must connect to a large number of outputs) and delivers performance superior to most video amplifiers at a fraction of the cost. As an input buffer, the HA4201's low input capacitance and high input resistance provide excellent video terminations when used with an external 75 resistor. This crosspoint contains no feedback or gain setting resistors, so the output is a true high impedance load when the IC is disabled (EN = 0).
Frequency Response
Most applications utilizing the HA4201 require a series output resistor, RS, to tune the response for the specific load capacitance, CL, driven. Bandwidth and slew rate degrade as CL increases (as shown in the Electrical Specification table), so give careful consideration to component placement to minimize trace length. As an example, -3dB bandwidth decreases to 160MHz for CL = 100pF, RS = 0. In big matrix configurations where CL is large, better frequency response is obtained by cascading two levels of crosspoints in the case of multiplexed outputs (see Figure 2), or distributing the load between two drivers if CL is due to bussing and subsequent stage input capacitance.
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HA4201
Control Signals
EN - The ENABLE input is a TTL/CMOS compatible, active high input. When driven low this input forces the output to a true high impedance state and reduces the power dissipation by two orders of magnitude. The EN input has no on-chip pull-up resistor, so it must be connected to a logic high (recommend V+) if the enable function isn't utilized. Tally - The Tally output is an open collector PNP transistor connected to V+. When EN = 1, the PNP transistor is enabled and current is delivered to the load. When the crosspoint is disabled, the Tally output presents a very high impedance to the external circuitry. Several Tally outputs may be wire OR'd together to generate complex control signals, as shown with the HA4404 in the application circuits below. The Tally load may be terminated to GND or to V- as long as the continuous output current doesn't exceed 3mA (6mA at 50% duty cycle, etc.). as the gain of two output driver. Figure 2 details a 16 x 1 switcher (basically a 16:1 mux) which uses the HA4201 in a cascaded stage configuration to minimize capacitive loading at each output node, thus increasing system bandwidth.
Power Up Considerations
No signals should be applied to the analog or digital inputs before the power supplies are activated. Latch-up may occur if the inputs are driven at the time of power up. To prevent latch-up, the input currents during power up must not exceed the values listed in the Absolute Maximum Ratings.
Intersil's Crosspoint Family
Intersil offers a variety of 1 x 1 and 4 x 1 crosspoint switches. In addition to the HA4201, the 1 x 1 family includes the HA4600 which is an essentially similar device but without the Tally output. The 4 x 1 family is comprised of the HA4314, HA4404, and HA4344. The HA4314 is a 14 lead basic 4 x 1 crosspoint. The HA4404 is a 16 lead device with Tally outputs to indicate the selected channel. The HA4344 is a 16 lead crosspoint with synchronized control lines (A0, A1, CS). With synchronization, the control information for the next channel switch can be loaded into the crosspoint without affecting the current state. On a subsequent clock edge the stored control state effects the desired channel switch.
Switcher/Router Applications
Figure 1 illustrates one possible implementation of a wideband, low power, 4 x 4 switcher/router. A 4 x 4 switcher/router allows any of the four outputs to be driven by any one of the four inputs (e.g. each of the four inputs may connect to a different output, or an input may connect to multiple outputs). This application utilizes the HA4201 for the input buffer, the HA4404 (4 x 1 crosspoint switch) as the switch matrix, and the HFA1112 (programmable gain buffer)
INPUT BUFFERS EN SOURCE0 75 OUT HA4201 RS
SWITCH MATRIX 10k
IN0
T0 CS
IN0
T0 CS
IN0
T0 CS
IN0
T0 CS
SOURCE1 75 SOURCE2 75 EN SOURCE3 75 OUT HA4201 IN3
HA4404 OUT RS T3
HA4404 OUT RS IN3 T3
HA4404 OUT RS IN3 T3
HA4404 OUT RS IN3 T3
10k RS OUTPUT BUFFERS X2 (HFA1112 OR HFA1115) 75 +
X2 75
+
X2 75
+
X2 75
+
-
OUT0
OUT1
OUT2
OUT3
FIGURE 1. 4 x 4 SWITCHER/ROUTER APPLICATION
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HA4201
SWITCHING MATRIX SOURCE0 IN0 75 IN1 IN2 SOURCE3 75 IN3 T0 10k T3 RS OUT SOURCE4 IN0 75 IN1 IN2 T3 SOURCE7 75 HA4404 SOURCE8 IN0 75 IN1 IN2 SOURCE11 75 IN3 T0 T3 RS OUT SOURCE12 IN0 75 IN1 IN2 SOURCE15 75 HA4404 IN3 OUT T0 T3 RS HA4201 EN 10k RS + X2 IN3 HFA1112 OR HFA1115 75 OUT OUT RS T0 HA4201 EN RS ISOLATION MUX OUTPUT BUFFER
-
FIGURE 2. 16 x 1 SWITCHER APPLICATION
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HA4201 Typical Performance Curves
1.0 0.75 0.5 0.25 0 -0.25 -0.5 -0.75 -1.0 TIME (5ns/DIV.) INPUT CAPACITANCE (pF) OUTPUT VOLTAGE (V)
VSUPPLY = 5V, TA = 25oC, RL = 10k, Unless Otherwise Specified
1.25 1.20 1.15 1.10 1.05 1.0 0.95 0.90 0.85 0.80 0.75 1 10 FREQUENCY (MHz) 100 500
FIGURE 3. LARGE SIGNAL PULSE RESPONSE
FIGURE 4. INPUT CAPACITANCE vs FREQUENCY
12 9 6 GAIN (dB) 3 0 -3 -6 -9 -12 1 10 100 FREQUENCY (MHz) 750 RS = 36 CL = 21pF RS = 82 R = 43 CL = 10pF S CL = 15pF
0.4 0.3 0.2 GAIN (dB) 0.1 0 -0.1 -0.2 -0.3 -0.4 1 10 FREQUENCY (MHz) 100 500 RS = 82 CL = 10pF RS = 36 CL = 21pF RS = 43 CL = 15pF
FIGURE 5. FREQUENCY RESPONSE
FIGURE 6. GAIN FLATNESS
-50 -60 OFF ISOLATION (dB) -70 -80 -90 -100 -110 -120 -130 1
VIN = 1VP-P RL = 10
10 100 FREQUENCY (MHz)
500
FIGURE 7. OFF ISOLATION
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HA4201 Die Characteristics
DIE DIMENSIONS: 51 mils x 36 mils x 19 mils 1290m x 910m x 483m METALLIZATION: Type: Metal 1: AlCu (1%)/TiW Thickness: Metal 1: 6kA 0.8kA Type: Metal 2: AlCu (1%) Thickness: Metal 2: 16kA 1.1kA PASSIVATION: Type: Nitride Thickness: 4kA 0.5kA TRANSISTOR COUNT: 53 SUBSTRATE POTENTIAL (Powered Up): V-
Metallization Mask Layout
HA4201
EN
GND
V-
IN V+
OUT
TALLY
All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification.
Intersil semiconductor 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
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