...DI TEST
MO
1
A
RF NRF vco PLL
D
SIGHI
A D
SIGLO
XTO NXTO
CLK23 XTO X NX GPS Accelerator
APB
RF_ON
Advance...tcxo input (23.104 MHz) Inverted tcxo input (23.104 MHz) XTO interface (capacitor) Inverted XTO inte...
...RSSI LOCK DET
UHF LO O/P UHF vco
900 MHz Tx IQ Mod 1900 MHz Tx
Tx I Tx Q
Tx IF Filter (Opt)
Figure 1 - Block Diagram 1
Zarli...tcxo VCC UHF PLL UHF CP VCC UHF LO OUT 900 LO OUT 1900 LO OUT RESETB ENABLE1 900 LO IN VCC UHF LO 19...
...istor - 40k to ground Ground TX vco output Idle mode control signal - active low - pulled low if left unconnected TX synthesiser charge pump...tcxo divided by 4 output Transmit data bit 0 (lsb) Transmit data bit 1 Transmit data bit 2 Transmit ...
... for 1st LO oscillator circuit (vco).
9
VCC (Charge Pump) PD-out
Supply voltage pin of the phase detector charge pump. This is a cu...tcxo).
20
VCC (Ref Block) GND (Ref Block) 2nd IFout
Supply voltage pin of output charge pum...
Description
3 V DUAL DOWNCONVERTER AND PLL FREQUENCY SYNTHESIZER