U2731B Datasheet, PDF (21/25 Pages) ATMEL Corporation – DAB ONE- CHIP FRONT END

U2731B
Figure 9. Measurement Circuit for Electrical Characteristics
51k
Microcontroller
REF IN
Address
select voltage _{44 43}
8.5V _100p
3.3n 3.3n
33k
22k
4.7k
BC846B
2.2k 2.2k
4.7k
BB545
1.2n
33k
27p
8.5V
2.2p
10n
47nH
10n
10n
100p
4.7p 2.2p 2.2p 4.7p
42 41 40 39 38 37 36 35 34 33 32 31
47n
30 29
1k
VAGCIF
3.3 µ
8.5V
10n
10n ^100p
28 27 26 25 24
4.7k
1.8k
10n
10n
23
IFAD
IFIN
50
U2731B
SCL
SDA
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
76k 76k
76k
100n
1n
1n
Switches
9k 9k
9k
100n
100n
1n
50
1n
50
3.3 µ
10n 10n ^{1n 220n}
100
51
U2730B-N
Pre-
selector
8.5V
RFA
RFB VAGCRF
O1SA
WAGC
SLI
8.5V
21
4671C–DAB–06/04