AK1545 Datasheet, PDF (18/39 Pages) Asahi Kasei Microsystems – 3.5GHz Low Noise Integer-N Frequency Synthesizer

[AK1545]
4．Reference counter
The reference input can be set with a dividing number in the range of 1 to 16383 using {R [13:0]}, which is an
14-bit address of {D[13:0]} in <Address0>. 0 cannot be set as a dividing number.
5．Prescaler
The dual modulus prescaler (P/P + 1) and the swallow counter are used to provide a large dividing ratio. AK1545
has a Dual modulus prescaler 32/33.
6．Power-down and Power-save mode
It is possible to operate in the power-down or power-save mode if necessary by using the external control pin.
Power On
Follow the power-up sequence.
Normal Operation
[PDN]
“Low”
“High”
“High”
“High”
Table 8 Power-down and Power-save mode
<Address2>
{PD2} {PD1}
Function
X
X Power Down
X
0 Normal Operation
0
1 Asynchronous Power Down
1
1 Synchronous Power Down
X : Don’t care
MS1471-E-00
18
2012/10