U2893B Datasheet, PDF (8/14 Pages) TEMIC Semiconductors – Modulation PLL for GSM, DCS and PCS Systems

U2893B
VS2
ÏÏÏÏÏÏ _CPC
4
I
I_CPCK /4
gm
1.1 V
2230
ÏÏÏÏ _GND
ref
2
up
ref
2
ÏÏ ₄
VSP
ÏÏ₄
ÏÏ down 2I
CPO
Ï_2I
ÏÏÏÏ _GNDP
= Transistor with an emitter area-factor of n
n
Figure 7. Charge pump
Ï _ND/RD
Ï _2k
ÏÏÏÏ _NND/NRD
ÏÏ_VS2
ÏÏÏ _2k
ÏÏÏÏÏÏÏ _{Vref_div}
GND
ÏÏÏÏÏÏ _{PU, PUMIX}
20k
ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ_GND
Figure 9. Power-up
VS2
MC
GND
ÏÏÏÏÏÏÏÏÏÏÏÏ
Figure 8. Dividers
60 mA
Figure 10. Mode control
N-divider
R-divider
MUX
^
C (U)
2.5 pF @ 2 V
Figure 11. ESD-protection diodes
8 (14)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A1, 29-Jan-76