器件名称: U2784B-BFSG3
功能描述: 2200 MHz / 200 MHz Twin PLL
文件大小: 151KB 共11页
简 介:U2784B
2200 MHz / 200 MHz Twin PLL
Description
U2784B is a low power twin PLL manufactured with TEMIC’s advanced UHF process. The maximum operating frequency is 2200 MHz and 200 MHz respec tively. It features a wide supply voltage range from 2.7 to 5.5 V. Prescaler and power down function for both PLL’s is integrated. Applications are DECT, DCS 1800 and WLAN.
Features
D Very low current consumption (typical 3 V/12 mA) D Supply voltage range 2.7 to 5.5 V D Maximum input frequency PLL1: 2200 MHz,
PLL2: 200 MHz
Benefits
D Low current consumption leads to extended talk time D Twin PLL saves costs and space D One foot print for all TEMIC twin PLL’s saves designin time
D 2 pins for separate power down functions D Output for PLL lock status D Prescaler 64/65 for PLL1 and 8/9 for PLL2 D SSO-20 package D ESD protected according to MIL-STD 833
method 3015 cl. 2
Block Diagram
1 VS analog VS digital DGND AGND OSCi OSCo 4 2 6 15 7 8 Oscillator Control functions 16 bit latch Lock select 10 Lock Port2 Ports Power down Test 9 14 20 5I/Port 0 HPD1/Port1 HPD2/Port4 Port3
on / off divide by 2
12 bit latch 1 12 bit reference divider 1 17 bit latch 1 Phase detector 1 Charge pump 1 3 17 CP1 VScp
RFi1
5
64 / 65 Prescaler 1
17 bit main divider 1
Clock Data Enable
11 3 bit 12 13 Load control
17 bit Shift register
Pump bias
19
Iset
12 bit latch 2 12 bit reference divider 2 14 bit latch 2 Phase detector 2 Charge pump 2 18 CP2
RFi2
16
8 / 9 Prescaler 2
14 bit main divider 2
95 10611……