SA7025 Datasheet, PDF (8/22 Pages) NXP Semiconductors – Low-voltage 1GHz fractional-N synthesizer

Philips Semiconductors
1GHz low-voltage Fractional-N synthesizer
CURRENT
I₂
I₁
Product specification
SA7025
V₁
V₂
VOLTAGE
I₂
I₁
Figure 3. Relative Output Current Variation
SR00602
CLOCK
DATA
STROBE
RF_IN
RF_IN
V_CCP
REF_IN
50
22nF
10K
50
22nF
50
10µF
22nF
22nF
150k
AUX_IN
50
22nF
1 CLOCK
2 DATA
V_DD 20
TEST 19
3 STROBE
LOCK ₁₈
4 _VSS
5 _RFIN
SA7025
RF 17
RN 16
6 RF_IN
V_DDA 15
7 V_CCP
PHP ₁₄
8 REF_IN
PHI ₁₃
9 RA
V_SSA 12
10 AUX_IN
PHA ₁₁
Figure 4. Test Circuit
10µF
22nF
V_DD
TEST
LOCK
RF
150k
150k
RN
10µF
1k
100
22nF
V_DD
A
V_PH
P
V_PHI
1k
V_PH
A
SR00603
1996 Aug 6
8