U2731B-NFN
| Model | U2731B-NFN |
| Description | DAB ONE- CHIP FRONT END |
| PDF file | Total 25 pages (File size: 654K) |
| Chip Manufacturer | ATMEL |
Electrical Characteristics (Continued)
Test conditions (unless otherwise specified): V
S
= 8.5 V, T
amb
= 25°C
No. Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
AGC threshold (th2)
Controlled by two-wire bus bits TBi;
(internal AGC)
2.10
upper limit (TBi = 1111) P
IN,MAX
= -25 dBm
lower limit (TBi = 0000)
2.11 Output impedance
3
3.1
3.2
4
VCO
Phase noise
Phase noise
IF Part
IFIN2 blocked
(see Figure 9 on page 21)
f
LO,IFMIX
= f
ref
or
F
LO,IFMIX
= 2
×
f
ref
IFIN2 blocked
(see Figure 9 on page 21)
IF mixer switched off
24
→
29
∆f
= 10 kHz
L(f)
f
LO
100
-88
400
dBc/Hz
MHz
D
D
Single ended; f(SAW1) = 39 MHz
16
V
int AGC,RF
1.0
Z
out,SAW
5.1
1.5
30
1.8
V
V
Ω
B
A
18 (19)
4.1
Voltage gain
G
V,tot
42
44
48
dB
A
4.2
4.3
4.4
Voltage gain
AGC range IF
Noise figure
(double side band)
Maximum input power
level
Input frequency range
Input impedance
24
→
29
G
V,tot
45
42
47
44
11
51
48
dB
dB
dB
A
A
D
IFIN2 blocked
IFIN2 blocked, 3rd order
intermodulation distance
≥
40 dBc;
RL(IFOUT) = 1 k; TCi = 0000;
R
10
= 4.7 k, R
11
= 1.8 k
24
→
29
NF
DSB
4.5
24
P
in,max
f
in,IFIN
Z
in,IFIN
f
out,IFO
Z
out,IFOUT
-20
dBm
C
4.6
4.7
4.8
23, 24
IFIN2 blocked, f
IF,IFIN
= 38.912 MHz
23, 24
29
10
600 -
j1000
1
20 + j50
65 + j35
58 - j25
60
MHz
Ω
D
D
D
Output frequency range Single ended
Single ended
f
out,IFO
(3 MHz)
f
out,IFO
(20 MHz)
f
out,IFO
(38.9 MHz)
V
WAGC
= LOW
V
SLI
= HIGH
45
MHz
Ω
Ω
Ω
4.9
Output impedance
29
D
5
5.1
5.2
5.3
5.4
5.5
RF AGC Unit
Positive charge pump
current, fast mode
16
16
16
16
ICPRF
POS,FM
ICPRF
NEG,FM
ICPRF
POS,SM
ICPRF
NEG,FM
VAGC
min
145
-220
30
-52
180
-180
40
-40
0.75
220
-145
52
-30
µA
µA
µA
µA
V
A
A
A
A
C
Negative charge pump V
WAGC
= LOW
current, fast mode
V
SLI
= HIGH
Positive charge pump
current, slow mode
V
WAGC
= LOW
V
SLI
= LOW
Negative charge pump V
WAGC
= LOW
current, fast mode
V
SLI
= LOW
Minimum gain control
voltage
*) 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).
16
U2731B
4671C–DAB–06/04
Related PDFs
| Model | Description | Manufacturer | Operation |
|---|---|---|---|
 U2731B-NFNG1
|
DAB ONE- CHIP FRONT END | ATMEL | Preview |
