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U2305B-AFSG3 Datasheet

  • U2305B-AFSG3

  • VHF/ UHF-Tuner-IC

  • 8頁(yè)

  • TEMIC

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U2305B
VHF/ UHF-Tuner-IC
Description
This tuner IC requires a power supply of 5 V and performs
the function of three separate oscillators an mixers,
SAWF-driver, L.O.-output and tri-state band switch.
This tuner IC is decigned for high performance tuners for
TV, VCR and PCs.
Features
D
5 V supply voltage
D
Frequency range from 48 to 860 MHz
D
Band A: balanced high impedance mixer input and
amplitude controlled 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
D
Band B + C: balanced low impedance mixer input and
symmetrical oscillator
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
1
3
4
6 5 7
8 10 9 11
19
2
Osc. A
Osc. B
Osc. C
Voltage-
Stabilizer
Band-Switch
12
L.O.
27
28
Mixer-Output
SAW-Driver
17
18
14
13
RF
Band A
25
24
23
Band B
22
26
21
Band C
12504
20
16 15
Figure 1. Block diagram
TELEFUNKEN Semiconductors
Rev. A1, 10-Sep-96
1 (8)
Preliminary Information

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