ADG936_15 Datasheet, PDF (1/17 Pages) Analog Devices – CMOS, 1.65 V to 2.75 V, Dual SPDT

Data Sheet
Wideband 4 GHz, 36 dB Isolation at 1 GHz,
CMOS, 1.65 V to 2.75 V, Dual SPDT
ADG936/ADG936-R
FEATURES
Wideband switch: −3 dB @ 4 GHz
ADG936 absorptive dual SPDT
ADG936-R reflective dual SPDT
High off isolation (36 dB @ 1 GHz)
Low insertion loss (0.9 dB dc to 1 GHz)
Single 1.65 V to 2.75 V power supply
CMOS/LVTTL control logic
20-lead TSSOP and 4 mm × 4 mm LFCSP packages
Low power consumption (1 μA maximum)
APPLICATIONS
Wireless communications
General-purpose RF switching
Dual-band applications
High speed filter selection
Digital transceiver front end switch
IF switching
Tuner modules
Antenna diversity switching
GENERAL DESCRIPTION
The ADG936/ADG936-R are wideband analog switches that
comprise two independently selectable SPDT switches using a
CMOS process to provide high isolation and low insertion loss
to 1 GHz. The ADG936 is an absorptive/matched dual SPDT
with 50 Ω terminated shunt legs; the ADG936-R is a reflective
dual SPDT. These devices are designed such that the isolation is
high over the dc to 1 GHz frequency range. They have on-board
CMOS control logic, eliminating the need for external controlling
circuitry. The control inputs are both CMOS and LVTTL
–10
V_DD = 2.5V
T_A = 25°C
–20
–30
–40
–50
S21
–60
–70
S12
–80
10k
100k
1M
10M
100M
1G
10G
FREQUENCY (Hz)
Figure 3. Off Isolation vs. Frequency
FUNCTIONAL BLOCK DIAGRAMS
RF1A
RFCA
50
RF2A
INA
ADG936 ^50
RF1B
RFCB
INB
50
RF2B
50
RFCA
INA
ADG936-R
RFCB
INB
RF1A
RF2A
RF1B
RF2B
Figure 1.
Figure 2.
compatible. The low power consumption of these CMOS
devices makes them ideally suited for wireless applications and
general-purpose high frequency switching.
PRODUCT HIGHLIGHTS
1. –36 dB off isolation @ 1 GHz.
2. 0.9 dB insertion loss @ 1 GHz.
3. 20-lead TSSOP and 4 mm × 4 mm LFCSP packages.
–0.3
–0.4
–0.5
–0.6
–0.7
–0.8
–0.9
–1.0
–1.1
–1.2
–1.3
–1.4
–1.5
–1.6
–1.7
V_DD = 2.5V
–1.8
–1.9
–2.0
–2.1
–2.2
–2.3
–2.4
–2.5
–2.6
–2.7
–2.8
–2.9
–3.0
T_A = 25°C
10k
100k
1M
10M
100M
1G
10G
FREQUENCY (Hz)
Figure 4. Insertion Loss vs. Frequency
Rev. B
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