low cost smt 8db bi-directional coupler 824 - 960 mhz CH20-0035-8G m/a-com, inc. north america: tel. (800) 366-2266 n asia/paci?: tel. +81 3 3263 8761 n europe: tel. +44 (1344) 869 595 fax (800) 618-8883 fax +81 3 3263 8769 fax +44 (1344) 300 020 1 v1.00 parameter unit min. typ. max. insertion loss db - 0.3 0.7 vswr - - 1.3:1 1.6:1 coupling db - 8 ? - coupling flatness db - 1.2 1.5 directivity db 10 15 - typical electrical speci cations 1 @ t a = +25? features bi-directional small size and low pro?e industry standard soic-8 smt plastic package superior repeatability typical insertion loss 0.3 db typical directivity 15 db 2 watt power handling description m/a-com? CH20-0035-8G is an ic based monolithic bi- directional coupler in a low cost soic-8 plastic package. this 8 db coupler is ideally suited for applications where power monitoring, small size, low insertion loss, superior repeatability and low cost are required. typical applica- tions include base station switching networks, power monitoring in handhelds and other communication applications where size and pcb real estate is a premi- um. available in tape and reel. the CH20-0035-8G is fabricated using a passive-integrated circuit process. the process features full chip passivation for increased performance and reliability. 1. all speci?ations apply with a 50-ohm source and load impedance. so-8 0?8 .0075-0.0098
(0.19-0.25) .1890-.1968
(4.80-5.00) .0099-0.0196
x 45?chamfer
(0.25-0.50)
.2284-.2440
(5.80-6.20)
pin 8 orientation
mark pin 1 8- lead sop outline dimensions
narrow body .150
(all dimensions per jedec no. ms-012-aa, issue c) dimensions in ( ) are in mm. .1497-.1574
(3.80-4.00) - b - - a - .050(1.27) bsc. .013-.020 typ.
(0.33-0.51) .0040-.0098
(0.10-0.25) - c - .0532-.0688
(1.35-1.75) .016-.050
(0.40-1.27) .010(0.25) m b m .010(0.25) m c a m b s unless otherwise noted: .xxx = ?0.010 (.xx = ?0.25) .xx = ?0.02 (.x = ?.5) .004 (0.10) l l l l l l l part number description CH20-0035-8G soic-8 lead plastic package CH20-0035-8G-tr forward tape & reel* CH20-0035-8G-rtr reverse tape & reel* ordering information * if speci? reel size is required, consult factory for part number assignment. preliminary speci?ations the preliminary speci?ations data sheet contains typical electrical speci?ations which may change prior to final introduction.
low cost smt 8db bi-directional coupler CH20-0035-8G m/a-com, inc. north america: tel. (800) 366-2266 n asia/paci?: tel. +81 3 3263 8761 n europe: tel. +44 (1344) 869 595 fax (800) 618-8883 fax +81 3 3263 8769 fax +44 (1344) 300 020 2 v1.00 typical performance @ +25? functional diagram gnd rf out -8db gnd 1 4 5 8 gnd gnd rf in coupled isolated 0 -5 -10 -15 -20 -25 -30 frequency (mhz) 700 750 800 850 900 950 1000 1050 1100 frequency (mhz) frequency (mhz) 700 750 800 850 900 950 1000 1050 1100 700 750 800 850 900 950 1000 1050 1100 700 750 800 850 900 950 1000 1050 1100 frequency (mhz) directivity (db) 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1 vswr (db) 0 -0.5 -1 -1.5 -2 insertion loss (db) directivity vs. frequency pin (4 to 8) ?pin (1 to 4) or pin (1 to 5) ?pin (5 to 8) vswr vs. frequency insertion loss vs. frequency pin 1 to 8 or pin 4 to 5 (includes loss due to coupling) -5 -5.5 -6 -6.5 -7 -7.5 -8 -8.5 -9 -9.5 -10 coupling (db) coupling vs. frequency pin 5 to 8 or pin 1 to 4 recommended pcb con?uration note: pins 2, 3, 6, and 7 must be rf and dc grounded. coupled rf in rf out isolated .018 dia. plated thru (12x) .050 dia. plated thru (2x) .081 typ. .030 typ. .035 typ. .244 .072 typ. .244 ()() (dimensions in inches) circuit material: fr-4, 0.16 thick parameter absolute maximum input power 2w cw operating temperature -40? to +85? storage temperature -65? to +150? absolute maximum ratings 1 1. exceeding these limits may cause permanent damage. the preliminary speci?ations data sheet contains typical electrical speci?ations which may change prior to final introduction.
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