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ADG918BCPZ-REEL7-ADG918BRM-500RL7-ADG919BRM
Wideband, 43 dB Isolation @ 1 GHz, CMOS 1.65 V to 2.75 V, 2:1 Mux/SPDT Switches
Wideband 4 GHz, 43 dB Isolation at 1 GHz,
CMOS 1.65 V to 2.75 V, 2:1 Mux/SPDT Switches
Rev. A
FEATURES
Wideband switch: −3 dB @ 4 GHz
Absorptive/reflective switches
High off isolation (43 dB @ 1 GHz)
Low insertion loss (0.8 dB @1 GHz)
Single 1.65 V to 2.75 V power supply
CMOS/LVTTL control logic
8-lead MSOP and tiny 3 mm × 3 mm LFCSP packages
Low power consumption (<1 µA)
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
CTRL
RFC
CTRL
RFC03335-A-001
Figure 1.
GENERAL DESCRIPTION The ADG918/ADG919 are wideband switches using a CMOS
process to provide high isolation and low insertion loss to
1 GHz. The ADG918 is an absorptive (matched) switch having
50 Ω terminated shunt legs, while the ADG919 is a reflective
switch. 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, thus eliminating the need for external
controlling circuitry. The control inputs are both CMOS and
FREQUENCY (Hz)
10k100k1M10M100M1G10G–100
OLATION (dB)03335-A
Figure 2. Off Isolation vs. Frequency
LVTTL compatible. The low power consumption of these
CMOS devices makes them ideally suited to wireless
applications and general-purpose high frequency switching.
PRODUCT HIGHLIGHTS 1. –43 dB Off Isolation @ 1 GHz.
2. 0.8 dB Insertion Loss @ 1 GHz.
3. Tiny 8-Lead MSOP/LFCSP Packages.
FREQUENCY (Hz)
10k100k1M10M100M1G10G–3.2
SER
TION
LOSS (03335-A
Figure 3. Insertion Loss vs. Frequency
TABLE OF CONTENTSADG918/ADG919–Specifications.................................................3
Absolute Maximum Ratings............................................................4
ESD Caution..................................................................................4
Pin Configuration and Function Descriptions.............................5
Terminology......................................................................................6
Typical Performance Characteristics.............................................7
Test Circuits.....................................................................................10
Applications.....................................................................................12
Absorptive vs. Reflective...........................................................12
Wireless Metering.......................................................................12
Tuner Modules............................................................................12
Filter Selection............................................................................12
ADG9xx Evaluation Board...........................................................13
Outline Dimensions.......................................................................14
Ordering Guide..........................................................................14
REVISION HISTORY
9/04—Changed from Rev. 0 to Rev. A Updated Format..................................................................Universal
Change to Data Sheet Title …………………………………….1
Change to Features…………..…………………………………...1
Change to Product Highlights…………………………………...1
Changes to Specifications.……..………………………………...3
Change to ADG9xx Evaluation Board section...……………….13
Changes to Ordering Guide…………………………………….14
8/03 Revision 0: Initial Version SPECIFICATIONS
Table 1. VDD = 1.65 V to 2.75 V, GND = 0 V, input power = 0 dBm, all specifications TMIN to TMAX, unless otherwise noted.1Temperature range B Version: −40°C to +85°C.
2Typical values are at VDD = 2.5 V and 25°C, unless otherwise stated.
ABSOLUTE MAXIMUM RATINGS1
Table 2. (TA = 25°C, unless otherwise noted.) NOTES
1 Stresses above those listed under Absolute Maximum Ratings may cause
permanent damage to the device. This is a stress rating only; functional
operation of the device at these or any other conditions above those listed
in the operational sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device
reliability. Only one absolute maximum rating may be applied at any one
time.
2 RF1/RF2 Off Port Inputs to Ground .............................. –0.5 V to VDD – 0.5 V
ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
VDD
CTRL
GND
RFC
RF1
GND
GND
RF203335-A
Figure 4. 8-Lead MSOP (RM-8)
8-Lead 3 mm x 3 mm LFCSP (CP-8)
Table 3. Truth Table
Table 4. Pin Function Descriptions TERMINOLOGY
Table 5. Terminology TYPICAL PERFORMANCE CHARACTERISTICS
SER
TION
LOSS (
FREQUENCY (Hz)
10k100k1M10M100M1G10G03335-A
Figure 5. Insertion Loss vs. Frequency over Supplies
(RF1/RF2, S12, and S21)
SER
TION
FREQUENCY (Hz)
10k100k1M10M100M1G10G03335-A
Figure 6. Insertion Loss vs. Frequency over Supplies (RF1/RF2,
S12, and S21) (Zoomed Figure 5 Plot)
SER
TION
LOSS (
FREQUENCY (Hz)
10k100k1M10M100M1G10G03335-A
Figure 7. Insertion Loss vs. Frequency over Supplies
(RF1/RF2, S12, and S21)
SER
TION
LOSS (
FREQUENCY (Hz)
10k100k1M10M100M1G10G03335-A
Figure 8. Insertion Loss vs. Frequency over Temperature
(RF1/RF2, S12, and S21)
OLATI
N (dB)
FREQUENCY (Hz)
10k100k1M10M100M1G10G03335-A
Figure 9. Isolation vs. Frequency over Supplies (RF1/RF2, ADG918)
OLATION (dB)
FREQUENCY (Hz)
10k100k1M10M100M1G10G03335-A
Figure 10. Isolation vs. Frequency over Supplies (RF1/RF2, ADG919)
FREQUENCY (Hz)
10k100k1M10M100M1G10G
OLATION (dB)
–10003335-A
Figure 11. Isolation vs. Frequency over Temperature (RF1/RF2, ADG919)
TURN LOS
(dB)
FREQUENCY (Hz)
10k100k1M10M100M1G10G03335-A
Figure 12. Return Loss vs. Frequency (RF1/RF2, S11)
TALK (dB)
FREQUENCY (Hz)
10k100k1M10M100M1G10G03335-A
Figure 13. Crosstalk vs. Frequency (RF1/RF2, S12, S21)
CH1 = CTRL = 1V/DIVTRISE = 6.1ns
CH2 = RF1 = 100mV/DIVTFALL= 6.1ns
CH3 = RF2 = 100mV/DIV
CH2/3
CH1A-024
Figure 14. Switch Timing
CH1 500mV CH2 1mVΩm 10.0ns03335-A
Figure 15. Video Feedthrough
FREQUENCY (MHz)
(dBm)03335-A
Figure 16. IP3 vs. Frequency
