Datasheet

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Wideband 4 GHz, 43 dB Isolation at 1 GHz,

CMOS 1.65 V to 2.75 V, 2:1 Mux/SPDT

Data Sheet

ADG918/ADG919

Rev. D Document Feedback

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FEATURES

Wideband switch: −3 dB at 4 GHz

Absorptive/reflective switches

High off isolation (43 dB at 1 GHz)

Low insertion loss (0.8 dB at 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

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

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, whereas 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

LVTTL compatible. The low power consumption of these

CMOS devices makes them ideally suited to wireless and

general-purpose high frequency switching applications.

FREQUENCY (Hz)

10k 100k

1M 10M 100M 1G 10G

–100

–90

–70

–60

–50

–40

–30

–80

–20

–10

ISOLATION (dB)

S21

= 2.5V

= 25°C

S12

03335-003

Figure 1. Off Isolation vs. Frequency

FUNCTIONAL BLOCK DIAGRAMS

RF2

RF1

CTRL

ADG918

RFC

50Ω

ADG919

RF2

RF1

CTRL

RFC

03335-001

Figure 2.

PRODUCT HIGHLIGHTS

1. −43 dB off isolation at 1 GHz.

2. 0.8 dB insertion loss at 1 GHz.

3. Tiny 8-lead MSOP/LFCSP.

FREQUENC

Y (Hz)

10k 100k 1M

10M 100M

1G 10G

–3.2

–2.8

–2.6

–2.4

–2.2

–1.8

–1.6

–1.4

–1.2

–1.0

–2.0

–3.0

–0.8

–0.6

–0.4

INSERTION LOSS (dB)

= 2.5V

= 25°C

03335-004

Figure 3. Insertion Loss vs. Frequency

Summary of content (16 pages)

PAGE 1
Wideband 4 GHz, 43 dB Isolation at 1 GHz, CMOS 1.65 V to 2.75 V, 2:1 Mux/SPDT ADG918/ADG919 Data Sheet FEATURES FUNCTIONAL BLOCK DIAGRAMS Wideband switch: −3 dB at 4 GHz Absorptive/reflective switches High off isolation (43 dB at 1 GHz) Low insertion loss (0.8 dB at 1 GHz) Single 1.65 V to 2.
PAGE 2
ADG918/ADG919 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Terminology .................................................................................... 10 Applications ....................................................................................... 1 Test Circuits ..................................................................................... 11 Functional Block Diagrams .........................
PAGE 3
Data Sheet ADG918/ADG919 SPECIFICATIONS VDD = 1.65 V to 2.75 V, GND = 0 V, input power = 0 dBm, all specifications TMIN to TMAX, unless otherwise noted. Temperature range for B Version: −40°C to +85°C. Table 1. Parameter AC ELECTRICAL CHARACTERISTICS Operating Frequency 2 3 dB Frequency 3 Input Power3 Symbol tON tOFF tRISE tFALL P–1 dB IP3 0 V dc bias 0.5 V dc bias DC to 100 MHz; VDD = 2.5 V ± 10% 500 MHz; VDD = 2.5 V ± 10% 1000 MHz; VDD = 2.
PAGE 4
ADG918/ADG919 Parameter CAPACITANCE3 RF On Capacitance CTRL Input Capacitance POWER REQUIREMENTS VDD Quiescent Power Supply Current Data Sheet Symbol Test Conditions/Comments CRF ON CCTRL f = 1 MHz f = 1 MHz IDD Digital inputs = 0 V or VDD Min B Version Typ 1 Max 1.6 2 1.65 0.1 Unit pF pF 2.75 1 V µA Typical values are at VDD = 2.5 V and 25°C, unless otherwise stated. Point at which insertion loss degrades by 1 dB. 3 Guaranteed by design, not subject to production test.
PAGE 5
Data Sheet ADG918/ADG919 ABSOLUTE MAXIMUM RATINGS TA = 25°C, unless otherwise noted. Table 2. Parameter VDD to GND Inputs to GND Continuous Current Input Power Operating Temperature Range Industrial (B Version) Storage Temperature Range Junction Temperature θJA Thermal Impedance MSOP LFCSP 2-Layer Board 4-Layer Board Lead Temperature, Soldering (10 sec) IR Reflow, Peak Temperature (<20 sec) ESD Rating −0.5 V to +4 V −0.5 V to VDD + 0.
PAGE 6
ADG918/ADG919 Data Sheet PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS RFC 4 TOP VIEW (Not to Scale) 8 RF1 7 GND 6 GND 5 RF2 VDD 1 8 RF1 CTRL 2 ADG918/ ADG919 7 GND GND 3 TOP VIEW (Not to Scale) 6 GND RFC 4 5 RF2 NOTES 1. EXPOSED PAD. TIE THE EXPOSED PAD TO SUBSTRATE, GND. 03335-030 GND 3 ADG918/ ADG919 03335-002 VDD 1 CTRL 2 Figure 5. ADG918/ADG919 Pin Configuration (LFCSP) Figure 4. ADG918/ADG919 Pin Configuration (MSOP) Table 3. Pin Function Descriptions Pin No.
PAGE 7
Data Sheet ADG918/ADG919 TYPICAL PERFORMANCE CHARACTERISTICS –0.2 –0.2 –0.4 –0.4 –0.6 –0.6 VDD = 2.5V –0.8 +25°C VDD = 2.75V INSERTION LOSS (dB) –1.4 –1.6 –1.8 –2.0 –2.2 –2.4 –2.6 –2.8 –1.2 –1.4 –1.6 –1.8 –2.0 –2.2 –2.4 –2.6 –2.8 TA = 25°C 100k 1M 10M 100M FREQUENCY (Hz) 1G 10G –3.2 10k Figure 6. Insertion Loss vs. Frequency over Supplies (RF1/RF2, S12, and S21) –10 –0.40 10M 100M FREQUENCY (Hz) 1G 10G VDD = 1.65V TO 2.75V TA = 25°C –20 –0.
PAGE 8
ADG918/ADG919 Data Sheet –10 VDD = 2.5V –20 CH1 –30 S12 (+85°C) –50 CH2/3 –60 S12 (+25°C) –70 S12 (–40°C) –80 –90 10k 100k 1M 10M 100M 1G 10G FREQUENCY (Hz) CH1 = CTRL = 1V/DIV TRISE = 6.1ns CH2 = RF1 = 100mV/DIV TFALL = 6.1ns 03335-024 S21 (–40°C, +25°C, +85°C) –100 03335-023 ISOLATION (dB) –40 CH3 = RF2 = 100mV/DIV Figure 15. Switch Timing Figure 12. Isolation vs. Frequency over Temperature (RF1/RF2, ADG919) 0 TA = 25°C VDD = 2.
PAGE 9
Data Sheet ADG918/ADG919 20 18 16 12 10 8 6 4 VDD = 2.5V TA = 25°C 2 0 0 250 500 750 1000 FREQUENCY (MHz) 1250 1500 03335-025 P–1dB (dBm) 14 Figure 18. P−1 dB vs. Frequency Rev.
PAGE 10
ADG918/ADG919 Data Sheet TERMINOLOGY tFALL Fall time; time for the RF signal to fall from 90% to 10% of the on level. VDD Most positive power supply potential. IDD Positive supply current. Off Isolation The attenuation between the input and output ports of the switch when the switch control voltage is in the off condition. GND Ground (0 V) reference. Insertion Loss The attenuation between the input and output ports of the switch when the switch control voltage is in the on condition.
PAGE 11
Data Sheet ADG918/ADG919 TEST CIRCUITS Setups for the ADG918 are similar. VDD 0.1µF VDD VDD ADG919 RF1 VDD NETWORK ANALYZER 50Ω RFC VS VOUT RFx RFC VOUT RL 50Ω CTRL 50% VCTRL RL 50Ω 50% 90% VOUT 50Ω RF2 CTRL VS 10% VCTRL tON GND 03335-009 GND tOFF 03335-012 0.1µF VOUT INSERTION LOSS = 20log VS Figure 22. Insertion Loss Figure 19. Switch Timing: tON, tOFF VDD 0.
PAGE 12
ADG918/ADG919 Data Sheet VDD VDD 0.1µF 0.1µF VDD ADG919 RF1 RF2 CTRL VCTRL RF1 RF SOURCE SPECTRUM ANALYZER GND RF2 CTRL RF SOURCE VCTRL Rev. D | Page 12 of 16 RF SOURCE VS GND Figure 26. P−1 dB Figure 25.
PAGE 13
Data Sheet ADG918/ADG919 APPLICATIONS INFORMATION a utility metering transceiver application, providing the required isolation between the transmit and receive signals. The SPDT configuration isolates the high frequency receive signal from the high frequency transmit. LNA ANTENNA ADG918 Other applications include switching between high frequency filters, an ASK generator, an FSK generator, and an antenna diversity switch in many tuner modules.
PAGE 14
ADG918/ADG919 Data Sheet ADG918/ADG919 EVALUATION BOARD The ADG918/ADG919 evaluation board allows designers to evaluate the high performance wideband switches with a minimum of effort. The RFC port (see Figure 30) is connected through a 50 Ω transmission line to the top left SMA connector J1. RF1 and RF2 are connected through 50 Ω transmission lines to the top two SMA connectors, J2 and J3 respectively.
PAGE 15
Data Sheet ADG918/ADG919 OUTLINE DIMENSIONS 3.20 3.00 2.80 8 3.20 3.00 2.80 1 5.15 4.90 4.65 5 4 PIN 1 IDENTIFIER 0.65 BSC 0.95 0.85 0.75 15° MAX 1.10 MAX 0.40 0.25 0.80 0.55 0.40 0.23 0.09 6° 0° 10-07-2009-B 0.15 0.05 COPLANARITY 0.10 COMPLIANT TO JEDEC STANDARDS MO-187-AA Figure 31. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters 1.84 1.74 1.64 3.10 3.00 SQ 2.90 1.55 1.45 1.35 EXPOSED PAD 0.50 0.40 0.30 0.80 0.75 0.70 0.30 0.25 0.
PAGE 16
ADG918/ADG919 Data Sheet ORDERING GUIDE Model 1 ADG918BRM ADG918BRM-REEL7 ADG918BRMZ ADG918BRMZ-500RL7 ADG918BRMZ-REEL ADG918BRMZ-REEL7 ADG918BCPZ-500RL7 ADG918BCPZ-REEL7 ADG919BRMZ ADG919BRMZ-REEL7 ADG919BCPZ-REEL7 EVAL-ADG918EBZ EVAL-ADG919EBZ 1 Temperature Range –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C Package Description 8-Lead Mini Small Outline Package [MSOP] 8-Lead Mini Smal