Wideband 4 GHz, 36 dB Isolation at 1 GHz,

CMOS, 1.65 V to 2.75 V, Dual SPDT

Data Sheet

ADG936/ADG936-R

Rev. B

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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

FUNCTIONAL BLOCK DIAGRAMS

INB

RF1B

RF2B

RFCB

ADG936

INA

RF1A

RF2A

RFCA

50



50



50



50



INA

INB

RF1A

RF2A

RF1B

RF2B

RFCB

RFCA

ADG936-R

Figure 1.

Figure 2.

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

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.

FREQUENCY (Hz)

10G

10k

100k

1M

10M

100M

1G

–10

–20

–30

–40

–50

–60

–70

–80

S12

S21

VDD = 2.5V

TA = 25°C

Figure 3. Off Isolation vs. Frequency

FREQUENCY (Hz)

10G

10k

100k

1M

10M

100M

1G

–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

–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

VDD = 2.5V

TA = 25°C

Figure 4. Insertion Loss vs. Frequency