U2309B
VHF/ UHF-Tuner-IC
Description
This tuner IC requires a power supply of 9 V and performs the function of three sep...
U2309B
VHF/ UHF-Tuner-IC
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
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
www.DataSheet4U.com
3
4
6 5 7
8 10 9 11
19
2
Osc. A
Osc. B
Osc. C Voltage stabiliser Band switch L.O. 12
27 28
Mixer output SAW–filter driver
17 18
14
RF Band A 25 24 23 Band B 22 26 21 Band C
95 10717
13
20
16 15
Figure 1. Block diagram
TELEFUNKEN Semiconductors Rev. A2, 29-May-96
1 (8)
U2309B
Pin Description
Osc A, base GND (common) Osc A, coll. Osc B, base Osc B, coll. Osc B, coll. Osc B, base Osc C, base Osc C, coll. 1 2 3 4 5 6 7 8 9 28 L.O. out 27 L.O. out 26 GND (RF) 25 RF in, A 24 RF in, A 23 RF in, B 22 RF in, B 21 RF in, C Pin 1 2 3 4, 7 5, 6 8, 11 9, 10 12 13,...