AK1573 Datasheet, PDF (8/42 Pages) Asahi Kasei Microsystems – Low Noise Integrated VCO

[AK1573/AK1573B/AK1573C]
10.3. Analog Circuit Characteristics
VDD=2.7 to 3.3V, -40C<Ta<85C, BIAS resistance =27kΩ unless otherwise specified.
The exposed pad at the center of the backside should be connected to the ground
Parameter
Min.
Typ.
Max. Unit
Description
REFIN
Input sensitivity
0.4
0.4
Input Frequency Range
10
VDD
2
300
Vpp
Vpp
MHz
REFIN frequency < 200MHz
REFIN frequency ≥ 200MHz
Maximum available prescaler
output Frequency
300 MHz Design guarantee value
Phase Frequency Detector(PFD)
PFD Frequency
104 MHz Design guarantee value
Charge Pump
Maximum Charge Pump current
2800
μA
Minimum Charge pump current
350
μA
Icp TRI-STATE leak current
1
nA
Ta = 25C, Vcpo = VDD / 2
Vcpo : CP pin voltage
Sink / Source current mismatch * 1
1
10
%
Vcpo = VDD / 2, Ta = 25C
Vcpo : CP pin voltage
Icp vs. Vcpo * 2
3
15
%
0.5 ≤ Vcpo ≤ VDD - 0.5
Ta = 25C
VCO
1480
2240 MHz AK1573
Operating Frequency Range
1728
2600 MHz AK1573B
2100
3000 MHz AK1573C
VCO tuning Sensitivity
fvco×0.02
MHz/V fvco : Oscillation Frequency
Phase Noise
@ 1.6GHz (AK1573)
@ 1.8GHz (AK1573B)
@ 2.1GHz (AK1573C)
OUTLV[2:0] bits ≥ “011”
10kHz offset
100kHz offset
1MHz offset
10MHz offset
-86
-112
-133
-151
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
VCOI bit = “1”
VCOI bit = “1”
VCOI bit = “1”
VCOI bit = “1”
Normalized Phase Noise
-223
dBc/Hz Note 3
Output Buffer
6
dBm OUTLV[2:0] bits = “111”
OUTPUT Power @1GHz
3
dBm OUTLV[2:0] bits = “101”
1
dBm OUTLV[2:0] bits = “011”
-5
dBm OUTLV[2:0] bits = “001”
Output Frequency
30
MHz Design guarantee value
Regulator
VREF1 start-up time
10
ms
Note
* 1. Sink/Source current mismatch： [(|Isink|-|Isource|)/{(|Isink|+|Isource|)/2}] * 100 [%]
* 2. Icp v.s.Vcpo：[{1/2*(|I1|-|I2|)}/{1/2*(|I1|+|I2|)}]*100 [%]
* 3. Measured in-band phase noise with the loop locked. Normalized Phase Noise is calculated from
following equation. REFIN frequency = 120MHz, F_PFD = 10MHz.
(PN_total = PN_synth -10 Log F_PFD- 20 Log N)
PN_total : Normalized Phase Noise
PN_synth : In-band Phase Noise
F_PFD : PFD Frequency
015009351-E-00
-8-
2015/8