U2731B
| Model | U2731B |
| Description | DAB ONE- CHIP FRONT END |
| PDF file | Total 25 pages (File size: 654K) |
| Chip Manufacturer | ATMEL |
Pin Description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Symbol
SCL
SDA
SWA
SWB
FREF
SWC
CAO
CCO
CBO
GND
GND
RFA1
RFA2
RFB1
RFB2
CPRF
GND
SAW1
SAW2
VS
SLI
WAGC
IFIN2
IFIN1
VS
IFAGCIN2
IFAGCIN1
CPIF
IFOUT
GND
GND
C1VC
B2VCO
B1VCO
C2VC
GND
GND
VS
PD
VD
Function
Clock (simple two-wire bus)
Data (simple two-wire bus)
Switching output (open collector)
Switching output (open collector)
Reference frequency output (for U2731B)
Switching output (open collector)
Output of D/A converter A
Output of D/A converter B
Output of D/A converter C
Ground
Ground
Input 1 of RF amplifier A (differential)
Input 2 of RF amplifier A (differential)
Input 1 of RF amplifier B (differential)
Input 2 of RF amplifier B (differential)
Charge-pump output (RF AGC block)
Ground
SAW driver output 1 (differential)
SAW driver output 2 (differential)
Supply voltage RF part
AGC mode selection (charge-pump current high)
AGC mode selection (charge-pump current off)
Input 2 of IF amplifier (differential)
Input 1 of IF amplifier (differential)
Supply voltage IF part
Input 2 of IF AGC block (differential)
Input 1 of IF AGC block (differential)
Charge-pump output (IF AGC block)
IF output (single ended)
Ground
Ground
Collector 1 of VCO
Base 2 of VCO
Base 1 of VCO
Collector 2 of VCO
Ground
Ground
Supply voltage PLL
Tri-state charge pump output
Active filter output
4
U2731B
4671C–DAB–06/04
Related PDFs
| Model | Description | Manufacturer | Operation |
|---|---|---|---|
 U2731B-NFN
|
DAB ONE- CHIP FRONT END | ATMEL | Preview |
|
U2731B-NFNG1
|
DAB ONE- CHIP FRONT END | ATMEL | Preview |
