U2731B-NFNG1
| Model | U2731B-NFNG1 |
| Description | DAB ONE- CHIP FRONT END |
| PDF file | Total 25 pages (File size: 654K) |
| Chip Manufacturer | ATMEL |
U2731B
Electrical Characteristics (Continued)
Test conditions (unless otherwise specified): V
S
= 8.5 V, T
amb
= 25°C
No. Parameters
15.8 SCL HIGH period
15.9 SCL LOW period
15.10 Hold time START
15.11 Setup time START
15.12 Setup time STOP
15.13 Hold time DATA
15.14 Setup time DATA
Test Conditions
Pin
Symbol
t
high
t
low
t
hdsta
t
susta
t
sustp
t
hddat
t
sudat
Min.
4
4.7
4
4.7
4.7
0
250
Typ.
Max.
Unit
µs
µs
µs
µs
µs
µs
ns
Type*
D
D
D
D
D
D
D
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note:
1. The phase detector’s phase-noise contribution to the VCO’s frequency spectrum is determined by the operating frequency
of the phase detector divided by 4 according to the fractional-N technique (regularly: 16 kHz).
Figure 6.
Application Circuit
8.5V
51k
microcontroller
33k
BC846B
22k
2.2k
33k
Miro crystal
16.384 MHz
CXAT-T1
18p
33p
Address
select voltage
44
68p
10n
41
40
39
100p
3.3n
2.2k
4.7k
27p
8.5V
10n
47nH
100p
38
37
36
3.3n
4.7k
VAGCIF
BB545
2.2p
8.5V
3.3
µ
Antialiasing
filter
AD-converter
4.7k
1.2n
1.8k
100p
10n
4.7p 2.2p 2.2p 4.7p
35
34
33
32
31
30
29
10n 10n
28
27
26
25
24
10n
23
43
42
U2731B
SAW
filter
680nH
S+M
X6922M
Micro-
controller
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
SCL
SDA
76k 76k
76k
1n
100n
100n
1n
WAGC
SLI
8.5V
Switches
100n
9k
9k
9k
1n
1n
3.3
µ
10n 10n
1n
220n
U2730B-N
Pre-
selector
8.5V
RFA
RFB
VAGCRF
19
4671C–DAB–06/04
