器件名称: U2309B-FLG3
功能描述: VHF/ UHF-Tuner-IC
文件大小: 189.81KB 共8页
简 介: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 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 Osc. A 3 4 6 5 7 8 10 9 11 19 2
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, 14 15, 16 17, 18 19 20,……