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PDF U2309B Data sheet ( Hoja de datos )
| Número de pieza | U2309B | |
| Descripción | VHF/ UHF-Tuner-IC | |
| Fabricantes | TEMIC Semiconductors | |
| Logotipo |  |
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VHF/ UHF-Tuner-IC
U2309B
Description
This tuner IC requires a power supply of 9 V and performs
the function of three separate oscillators an mixers,
SAWF-driver, L.O.-output and tri-state band switch.
Additional to TV-tuner application this IC is usable for
DAB (Digital Audio Broadcast) tuners.
Features
D 9 V supply voltage
D Frequency range from 48 to 860 MHz
D Band A: balanced high impedance mixer input and
amplitude controlled oscillator
D Band B + C: balanced low impedance mixer input and
symmetrical oscillator
D Balanced L. O.-outputs for prescalers or PLL
D SAW filter driver with low impedance output
D Voltage regulator for stable operating characteristics
D ESD protection on all pins except oscillator pins and
RF-inputs
www.DataSheet4U.com
Benefits
D The integration of 3 bands and the small SSO28
package allows to design very small and economical
3-band tuners with high performance.
Block Diagram
13
4 65 7
Osc. A
Osc. B
8 10 9 11
Osc. C
19 2
Voltage stabiliser
Band switch
L.O.
12
27
28
Mixer output
SAW–filter driver
17
18
14
Band A
25 24
RF
Band B
Band C
23 22 26 21
Figure 1. Block diagram
20
16 15
13
95 10717
TELEFUNKEN Semiconductors
Rev. A2, 29-May-96
1 (8)
1 page  
Test and Principle Application Circuit
U2309B
Band C
UHF
Band B
VHFH
Band A
VHFL
I/P
I/P
I/P
L.O. 100p
180 o
180 o
1n 1n 1n 1n 1n 1n
Hybrids 0 / 180 degree
with 50 ohms Z(in)
and 100 ohms (2x50) Z(out)
L6
15p
10n
VS
1n 1n
IF : PC 38.9 MHz
SC 33.4 MHz
100p
L.O.
25 21 17
U2309B
Air Coils 0.6 mm
1
5
enamelled copper wire
L1 8 turns 3.0 mm dia.
L2 3 turns 2.5 mm dia. 1p
L3 3 turns 2.5 mm dia.
L4 3 turns 2.5 mm dia.
TOKO–Coils
L5 12+2 turns
L6 6+6 turns
L1
2p2 2p7
18 2p7 2p2
2p
BB620
L2
68p
1k
82p
BB619
9 13
1p 1p
1p 1p
L3
2k2
100p
L4
18k
The output–voltage of the
IF is calculated back to the
primary coil of L5
1n 15p L5
1n
IF–Out
O/P
VSW
1n
18k
10n
18k 8p2 BB515
18k
VT
95 10718
Figure 2. Test and principle application circuit
PCB for the RthJA-Measurement
Material: 35 m m one-sided Cu-coated epoxy PCB,
40 mm 40 mm 1.5 mm
R(th) SO28 U2300B
95 10719
Figure 3. PCB for the RthJA-measurement
TELEFUNKEN Semiconductors
Rev. A2, 29-May-96
5 (8)
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet U2309B.PDF ] | |
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