Series 91 and 92 Miniature Broadband SP2T Switches

Application Notes for RF Switches

• Frequency range (Series 91): 1 to 18 GHz
• Frequency range (Series 92): 0.2 to 4 GHz
• Rise and fall times as fast as 10 ns
• Reflective and Non-reflective models
• Low VSWR and Insertion loss
• Miniature size, light weight

MODELS 9120-500 AND 9220-500

These switches provide high-performance characteristics over a multi-octave frequency range. Model 9120-500 covers the frequency range of 1 to 18 GHz; Model 9220-500 covers the frequency range of 0.2 to 4 GHz. Both models use an integrated circuit assembly of a series-shunt configuration of PIN diodes mounted in a microstrip transmission line as shown below.

PORT CONTROL

By applying positive current to a bias terminal, the associated port is OFF since the corresponding shunt diodes are biased to a low resistance and the series diode to a high resistance. With negative current at the bias terminal, the converse conditions are established and the port is ON. Since bias terminals are individually available for both ports, the user has the option of any combination of ports ON or OFF.

MODELS 9120T-500, 9120W-500 and 9220T-500

These switches are non-reflective versions of the switches described to the left. They are constructed in the configuration shown below.

When positive current is applied, the port is OFF since the associated series diodes are back-biased to a high resistance. At the same time, the corresponding shunt diode is biased to a low resistance, and the impedance at the port is then effectively that of the 50 ohm resistor in series with the shunt diode. When applying negative current, the converse conditions are established and the port is ON.

Note that when all output ports are OFF, a high VSWR will be present at the common port.

MODEL 9120AH-500

This switch has the same circuit topology as the 9120-500 except it is equipped with high-speed diodes to achieve rise and fall times of 10 ns.

MODEL 9120AHT-500

This switch is similar to the 9120AH-500 except it includes a terminating network as shown below.

SERIES F91/F92

The Series F91/F92 units are the same as the Series 91/92 units except they are equipped with integrated drivers that are powered by +5 and -12 to -15V supplies. The proper currents required to switch the ports ON or OFF are provided by the drivers, which are controlled by external control signals. Standard units are wired so that a port is ON with the application of a logic “0” control signal.

SERIES G91 and G92

• Frequency range (Series G91): 1 to 18 GHz
• Frequency range (Series G92): 0.2 to 4 GHz
• Reflective and non-reflective models
• Low VSWR and Insertion loss
• Up to 60 dB isolation
• Positive DC supplies only
• Miniature size, light weight

SERIES G91 and G92

Operating from +5 and +15V power supplies only, the G-series switches provide high performance characteristics at relatively high speeds over multi-octave frequency ranges. The series includes low Insertion loss and high isolation models in both reflective and non-reflective configurations. Series G91 units cover the frequency range of 1 to 18 GHz; Series G92 units cover the frequency range of 0.2 to 4 GHz. The design is based on an integrated circuit assembly of PIN diodes mounted in a microstrip transmission line as shown below. The currents required to switch the ports ON or OFF are provided by the integrated driver, which is controlled by external TTL logic signals.

SERIES G91T/G92T and G91W

These switches are non-reflective versions of the switches described above.

*Special-order product. Consult factory before ordering.

NOTE
(1) Models prefixed with “F” or “G” are equipped with integrated TTL-compatible drivers; models without the “F” or “G” prefix are current-controlled units and are furnished without drivers; models suffixed with “T” or “W” are non-reflective except a high VSWR will be present at the common port if all other ports are OFF; models suffixed with “H” are high-speed units.

SWITCHING CHARACTERISTICS(2)    SERIES 91/F91/G91           Units without “H” suffix            ON time …………………………………………………… 250 ns max.            OFF time …………………………………………………. 250 ns max.        Units with “H” suffix             Rise time ………………………………………………… 10 ns max.             Fall time …………………………………………………. 10 ns max.             ON time ………………………………………………….. 25 ns max.             OFF time ………………………………………………… 20 ns max.             Repetition rate ………………………………………… 20 MHz max.   SERIES 92/F92/G92             ON time …………………………………………………. 500 ns max.             OFF time ………………………………………………… 500 ns max. NOTE (2) For driverless units, shaped current pulses must be provided by user. POWER SUPPLY REQUIREMENTS    SERIES 91/92/F91/F92         Driverless Units         Bias current required at each port for rated isolation and Insertion loss.         PORT OFF             Units without “H” suffix ……………………………….. +50 mA             Units with “H” suffix ……………………………………. +30 mA         PORT ON             Units without “H” suffix ………………………………. -50 mA             Units with “H” suffix ……………………………………. -35 mA           Units With Integrated Drivers (For one port ON) +5V ±5% -12 to -15V Units Without “H” Suffix 65 mA 65 mA Units With “H” Suffix 60 mA 50 mA Units With “HT” Suffix 80 mA 50 mA    SERIES G91/G92 (For one port ON)……………………                             +5V ±5%, 100 mA +15V ±5%, 30 mA CONTROL CHARACTERISTICS    SERIES 91/92/F91/F92        Units With Integrated Drivers            Control Input Impedance                Units without “H” suffix……………………….. TTL, low power Schottky, one unit load. (A unit load is 0.8 mA sink current and 40 µA source current.)                Units with “H” suffix……………………………. TTL, advanced Schottky, one unit load. (A unit load is 0.6 mA sink current and 20 µA source current.)            Control Logic ……………………………………….. Logic “0” (-0.3 to +0.8V) for port ON and logic “1” (+2.0 to +5.0V) for port OFF.    SERIES G91/G92          Control Input Impedance ………………………… Schottky TTL, one unit load. (A unit load is 2.0 mA sink current and 50 µA source current.)          Control Logic………………………………………….. Logic “0” (-0.3 to +0.8V) for port ON and logic “1” (+2.0 to +5.0V) for port OFF. OPTION (G09) ENVIRONMENTAL RATINGS Temperature Range     Operating ……………………………. -54°C to +110°C     Non-Operating ……………………… -65°C to +125°C Humidity ………………………………… MIL-STD-202F, Method 103B, Cond. B (96 hrs. at 95%) Shock …………………………………….. MIL-STD-202F, Method 213B, Cond. B (75G, 6 msec) Vibration …………………………………. MIL-STD-202F, Method 204D, Cond. B (.06″ double amplitude or 15G, whichever is less) Altitude …………………………………… MIL-STD-202F, Method 105C, Cond. B (50,000 ft.) Temp. Cycling ………………………….. MIL-STD-202F, Method 107D, Cond. A, 5 cycles AVAILABLE OPTIONS Option No.       Description 3 SMA female bias/control connectors 7 J1, J2 and J3 SMA male 7A J1 SMA male; J2 and J3 SMA female 7B J1 SMA female; J2 and J3 SMA male 9 Inverse control logic; logic “0” for port OFF and logic “1” for port ON (Not applicable to Series 91/92) 27 Single-port toggle control; logic “0” connects J1 to J2 (Not applicable to the Driverless Units, Series 91/92) 33 EMI filter solder-type bias/control terminals  41(3) Internal video filter, common port only  42(3) Internal video filter, output ports only  43(3) Internal video filter, all ports  55(4) Frequency range 0.5 to 18 GHz. 64A SMB male bias/control connectors G09 Meeting the specified Environmental Ratings G12 RoHS Compliant G18  REACH Compliant     NOTES (3)  Not applicable to Series 92/F92/G92.*See Video Filter Options at Switches Applications Notes (4)  Applicable only to 1 to 18 GHz switches. See impact of Option 55 on specifications   DIMENSIONS AND WEIGHT Dimensions in  mm (Inches) Tolerances, unless otherwise indicated: .XX ±.02; .XXX ±.005