ChongMing Group (HK) Int'l Co., Ltd
CHONGMING GROUP (HK) INT'L CO., LTD.
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Integratedcircuits Electronics ADG918BRMZ Wideband 4 GHz 43 dB Isolation
ADG918BRMZ Wideband 4 GHz, 43 dB Isolation at 1 GHz, CMOS 1.65 V to 2.75 V, 2:1 Mux/SPDT
FUNCTIONAL BLOCK DIAGRAMS
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
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.
PRODUCT HIGHLIGHTS
1. –43 dB off isolation @ 1 GHz.
2. 0.8 dB insertion loss @ 1 GHz.
3. Tiny 8-lead MSOP/LFCSP packages.
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.
| Parameter | Symbol | Conditions | Min |
B Version Typ1 |
Max | Unit |
|
CAPACITANCE3 RF On Capacitance CTRL Input Capacitance |
CRF ON CCTRL |
f = 1 MHz f = 1 MHz |
1.6 2 |
pF pF |
||
|
POWER REQUIREMENTS
VDD
Quiescent Power Supply Current |
IDD | Digital inputs = 0 V or VDD | 1.65 |
0.1 |
2.75 1 |
v μA |
1 Typical values are at VDD = 2.5 V and 25°C, unless otherwise stated.
2 Point at which insertion loss degrades by 1 dB.
3 Guaranteed by design, not subject to production test.
4 The dc transience at the output of any port of the switch when the control voltage is switched from high to low or low to high in a 50 Ω test setup, measured with 1 ns rise time pulses and 500 MHz bandwidth.