STW81103 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

STW81103

Multi-band RF frequency synthesizer with integrated VCOs

STMicroelectronics 

Prev 21 22 23 24 25 26 27 28 29 30 Next

Circuit description

STW81103

Note:

Table 7. Current value vs. selection

CPSEL2

CPSEL1

CPSEL0

Current

Value for REXT=4.7 KΩ

0

0

0

IMIN

0

0

1

2*IMIN

0

1

0

3*IMIN

0

1

1

4*IMIN

1

0

0

5*IMIN

1

0

1

6*IMIN

1

1

0

7*IMIN

1

1

1

8*IMIN

0.5 mA

1.0 mA

1.5 mA

2.0 mA

2.5 mA

3.0 mA

3.5 mA

4.0 mA

The current is output on pin ICP. During VCO auto-calibration, the ICP and VCTRL pins are

forced to VDD/2.

Figure 18. Loop filter connection

VDD

VCTRL

BUF

C3

R3

Charge

Pump

ICP

R1

C2

C1

BUF

Cal bit

22/53

Share Link: