Agilent 8765A/B/C/D
Microwave SPDT Switches
DC to 4, 20, 26.5 and 40 GHz
Product Overview
Driving the Agilent 8765A/B/C/D
Features and description
• High isolation
• Exceptional reliability, long life
(5 million cycles)
• Excellent repeatability (± .03 dB)
• Unterminated
The Agilent Technologies 8765 family
of switches is designed for microwave
instrumentation and ATE systems
and features excellent electrical and
mechanical performance.
The 8765A and 8765B are equipped
with SMA connectors and operate
from dc to 4 and 20 GHz respectively.
The higher performance 8765C and
D switches operate from dc to 26.5
GHz with 3.5 mm connectors, and
40 GHz with 2.4 mm connectors.
For applications that call for 2.92 mm
connectors, Option 292 can be ordered
with the 8765D. All the switches are
available with voltage options covering any drive voltage between 4.5 volts
and 32 volts dc. Where performance
data is required, Option UK6 includes
a print out of test results.
This family of switches was designed
from the ground up for maximum
dependability and performance. The
switches are all designed to operate
within their specifications for more
than 10,000,000 cycles. In precision
measurement and monitoring applications where insertion loss repeatability
is critical, all the 8765s will operate
in excess of 5,000,000 cycles with
better than 0.03 dB of insertion loss
repeatability at 25 °C.
The 8765 switch family is available
with two methods for connecting to
the dc control circuitry. The standard
switch comes with a ribbon cable terminated with a single in-line five
position male connector with one pin
removed. The user has the option of
ordering solder terminals (Option 3xx)
where they are required (Figure 3).
The 8765 Switches have both sides of
the switching solenoids available to
the user. Typically, as is the case with
the 8762 switches, the switching solenoids will have a common positive
terminal or a common ground. By
making both sides of each coil available, users can select the dc drive
method that best suits their needs.
The suggested methods are:
1. Common negative drive
2. Common positive drive
3. Polarity reversal drive
Regardless of which method is chosen
for switching, two conditions will
always apply:
• the switch is positive latching, and
• since there are no dc current
interrupts, the supply may be continuous or may be switched off
after the 15 ms switching time.
Common negative drive
With the common negative drive
method, the two outside pins on the
ribbon cable or the two outside terminals on the solder block are connected
together to form a common negative
or ground. Switching is then accomplished by applying the appropriate
positive voltage to either of the inner
pins or terminals (figure la).
Common positive drive
To drive the switch with a common
positive arrangement, the two inner
pins or terminals are tied together
and then to a positive voltage. To
effect switching, one of the two outer
pins or terminals is brought to
ground (figure la).
Polarity reversal drive
To drive the switch using a polarity
reversal scheme, the two inner pins
or terminals are tied together. The
switch will complete a circuit
between the two RF contacts on the
side of the switch to which the negative or ground potential has been connected (figure 1a).
Interfacing the Agilent 8765
The 8765 family of switches is a
vailable with two dc control connection options. The standard switch is
connected to the dc drive circuitry
via a ribbon cable. Option 3xx allows
soldering wires between the control
circuitry and the switch.
Figure 1a. DC control circuit configurations
Ribbon cable
The kapton flex circuit ribbon cable
on the standard switch is terminated
to a single in-line male polarized connector with four 0.64 mm (0.025 in.)
square pin posts on 2.54 mm (0.100 in.)
centers. Position number 2 has been
removed to facilitate polarization of
the plug and receptacle (figure 1a).
To assist you in connecting your drive
circuit to the switch's ribbon cable
connector, a six foot long four wire
cable is included with every standard
switch. The cable is terminated on
one end with a 0.64 mm (0.025 in.)
square pin receptacle. The five position receptacle is polarized to mate
with the switch’s ribbon cable connector. The opposite end of the cable
is left unterminated for connecting to
your control circuits.
Figure 1b. Suggested receptacle dimensions
The six foot cable provides a quick
and convenient way of connecting the
switch to your control circuits for
evaluation and low volume production. For high volume production a
more convenient or more permanent
connection may be suggested.
Soldering the ribbon cable connector
into a circuit board provides a reliable and rugged connection. Mating
the ribbon cable connector to a PC
board connector provides a quick to
install and remove connection. The
suggestions below are intended to
provide minimum connection requirements. These suggestions are not
endorsements or recommendations of
one method over another. It is the
responsibility of the user to determine the suitability for use of any
interconnect method for a particular
The PC board hole pattern should
have the center lines of the through
holes along a single axis separated
by 2.54 mm ± 0.08mm (0.100 in.
± 0.003 in.). The suggested hole
diameter for a 0.64 mm (0.025 in.)
pin is 1.00 mm ± 0.076 mm (0.040 in.
± 0.003 in.).
Figure lb shows a suggested receptacle dimension.
Soldered connections
The ends of the switch ribbon cable
can also be soldered directly to a PC
board. This method provides a semipermanent connection that can withstand higher vibration environments
than can the PC board connectors.
Omission of position 2 in the PC hole
pattern is suggested to help prevent
soldering the connector in the wrong
PC board connectors
PC board connectors are available in
surface mount and solder pin styles
and in horizontal and vertical orientations. This type of connector makes
connection to and disconnection from
the dc circuit quick and convenient.
The connectors should be a minimum
of five positions wide, and depending
upon the number of switches to be
connected can be any multiple of five
positions (ie. 10, 15, 25, etc.). Single
row or double row configurations can
also be used to increase connector
density. The contacts should accept
0.64 mm (0.025 in.) square pins set
on 2.54 mm (0.100 in.) centers and up
to 5.84 mm (0.230 in.) long. Use of a
polarizing plug in the second position
of each switch connection is recommended to help ensure proper orientation.
Optional ribbon connector
extension cables
Optional extension cables for the
switch ribbon cable connector are
available as Option 108 for an 8 inch
extension and Option 116 for a 16 inch
extension. The cables have male and
female ends configured as indicated
in figure la “Ribbon Cable Connector”
and figure 1b “Minimum Receptacle
Requirements.” These ribbon cables
can be connected to the dc control
circuitry with the same methods suggested above.
Optional solder terminals
Solder terminals in place of the ribbon cable for connecting to the dc
control circuitry are available as
Option 3xx. The four solder terminals
provide access to both sides of each
of the solenoids.
Easy GPIB programmability
The Agilent 8765 switch family
can be easily used in ATE systems
with GPIB control using the 11713A
Attenuator/Switch Driver. The 11713A
provides manual and programmable
control of up to 10 24 V switches or
solenoids. Connecting between the
11713A and four 8765A/B/C/D
Option 024 switches is made easy
via the 11761A cable/adapter. The
11713A provides 24 Vdc and 0.65A
continuously or 1.3A peak (up to
1 second). The non-interrupting 8765
Option 024 draws 120 mA continuously, allowing the 11713A to drive
up to five of these switches at a time.
Five more dc circuit interrupting
8762/3/4s or up to five sections of
step attenuators or multiport switches can be driven simultaneously.
Frequency range:
dc to 4 GHz
dc to 20 GHz
dc to 26.5 GHz
dc to 40 GHz
Insertion loss (dB):
(f is frequency in GHz)
0.2 + 0.025f
0.2 + 0.025f
0.25 + 0.027f
0.2 + 0.023f (dc to 26.5 GHz)
0.75 + 0.023f (26.5 to 40 GHz)
*Typical insertion loss:
0.2 @ 4 GHz
0.2 @ 4 GHz
0.5 @ 20 GHz
0.2 @ 4 GHz
0.5 @ 20 GHz
0.7 @ 26.5 GHz
0.2 @ 4 GHz
0.5 @ 20 GHz
0.7 @ 26.5 GHz
1.0 @ 40 GHz
Isolation (dB):
(f is frequency in GHz)
110-2.25f (dc to 26.5 GHz)
50 dB (26.5 to 40 GHz)
*Typical isolation:
120 @ 4 GHz
120 @ 4 GHz
90 @ 20 GHz
120 @ 4 GHz
90 @ 20 GHz
60 @ 26.5 GHz
120 @ 4 GHz
90 @ 20 GHz
60 @ 26.5 GHz
50 @ 40 GHz
<1.2 dc to 4 GHz
<1.2 dc to 4 GHz
<1.35 4 to 12.4 GHz
<1.45 12.4 to 18 GHz
<1.7 18 to 20 GHz
<1.25 dc to 4 GHz
<1.45 4 to 18 GHz
<1.7 18 to 26.5 GHz
<1.10 dc to 4 GHz
<1.30 4 to 26.5 GHz
<1.50 26.5 to 40 GHz
*Typical SWR:
<1.15 dc to 4 GHz
<1.15 dc to 4 GHz
<1.3 4 to 12.4 GHz
<1.4 12.4 to 20 GHz
<1.15 dc to 4 GHz
<1.3 4 to 12.4 GHz
<1.4 12.4 to 26.5 GHz
<1.05 dc to 4 GHz
<1.24 to 26.5 GHz
<1.3 26.5 to 40 GHz
Connectors: standard
SMA (f)
SMA (f)
3.5 mm (f)
2.4 mm (f) (Option 241)
2.92 mm (f) (Option 292)
<0.03 dB
<0.03 dB
<0.03 dB
<0.03 dB
(Up to 5,000,000 Cycles
measured at 25 °C)
* Specifications describe the instrument's warranted performance. Supplemental and typical characteristics are intended to provide information
General operating data
Maximum power rating:
2 Watt average for switching with power
100 Watt peak, non-switching
Life: 10,000,000 cycles
Switching speed: 15 ms maximum
Solenoid electrical specifications and switching voltage options
005, 305
010, 310
015, 315
024, 324
5 (4.5 to 7) Vdc
10 (7 to 12 ) Vdc
15 (12 to 20) Vdc
24 (20 to 30) Vdc
385 mA @ 5 Vdc
300 mA @ 10 Vdc
200 mA @ 15 Vdc
120 mA @ 24 Vdc
13 Ω, 8 mH
33 Ω, 25 mH
75 Ω, 55 mH
200 Ω, 135 mH
Operating temperature: –25 °C to 75 °C
Storage temperature: –55 °C to 85 °C
Temperature cycling: –55 °C to 85 °C, 10 cycles
per MIL-STD 202F, Method 107D,
Condition A (Modified)
Operating: 7g’s: 5 to 2000 Hz @ 0.25” p-p
Survival: 20 g’s; 20 to 2000 Hz @ 0.06” p-p,
4 min/cycle, 4 cycles/axis
Random: survival: 2.41 g(rms) 10 min/axis
Half sine: 500 g’s @ 0.5ms, 3 drops/
direction, 18 total
Operating: 50 g’s @ 6 ms, 6 directions
Moisture resistance: 65 °C, 95% RH, 10 days per
MIL-STD-202F, Method 106E
Altitude storage: 50,000 ft (15,240 meters) per
MIL-STD-202F, Method 105C, Condition B
RFI: Per MIL-STD-461C, RE02, Part 4
Electrostatic discharge: 25 kV maximum
Abuse: 2W, CW, 1 kw peak pulse (10 uS),
2 minute duration.
Operating life: To meet 0.03 dB IL repeatability:
5 million cycles. To meet specifications:
10 million cycles.
Figure 3. Option 3xx with solder terminals
part dimensions in millimeters and (inches)
Figure 2. Standard unit part dimensions in
millimeters and (inches)
This drawing is not to scale.
Ordering information
All switches must be ordered with a
voltage option to be valid. Standard
switches are equipped with ribbon
cables terminated to a single in-line
connector (see information inside
data sheet for application information). All standard switches come
with a six foot cable with mating connector on one end to facilitate connection to the user’s control circuitry.
The Agilent 8765D may be ordered
with optional 2.92 mm connectors
in place of the 2.4 mm connectors.
2.92 mm connectors can mate with
3.5 mm connectors.
Agilent 8765A/B/C/D options and
Microwave SPDT switches
To add options to a product, use the following scheme:
8765x (x = A, B, C, D)
Model options: 8765x-opt #1
8765x-opt #2
Supply voltage (must choose one)
Calibration data
Option UK6 includes a print out of
the SWR (reflection) and insertion
loss data for the switch as measured
on the automatic network analyzer.
The network analyzer’s measurement
uncertainties have been minimized
and all measurements are directly
traceable to NIST standards (not
available for Option 292).
The Agilent 11761A Cable/Adapter is
available for directly connecting the
ribbon cables of up to four 8765
switches to the 11713A Attenuator/
Switch Driver. This cable is 5 feet long.
The Agilent 11713A Attenuator/Switch
driver is designed to provide manual
and GPIB control of switches and
atten-uators. The 11713A can drive
up to five 8765 series switches and
five self-interrupting switches, such
as the 8762, 3 or 4, or step attenuator
sections. Option 024 switches (24V)
must be ordered for use with the
DC to 4 GHz
DC to 20 GHz
DC to 26.5 GHz
DC to 40 GHz
5V dc supply voltage with 3 inch
ribbon cable terminated with a
single in-line
10V dc supply voltage with 3 inch
ribbon cable terminated with a
single in-line
15V dc supply voltage with 3 inch
ribbon cable terminated with a
single in-line
24V dc supply voltage with 3 inch
ribbon cable terminated with a
single in-line
5V dc supply voltage with solder
10V dc supply voltage with solder
15V dc supply voltage with solder
24V dc supply voltage with solder
Calibration documentation
Commercial calibration certificate
with test data
8 inch (20.3 cm) dc cable extension
16 inch (40.6 cm) dc cable extension
RF connectors
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2.4 mm female
2.92 mm female
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Product specifications and descriptions in this document
subject to change without notice.
© Agilent Technologies, Inc. 1995, 2000, 2006
Printed in U.S.A. August 1, 2006