FS7140 datasheet(13/17 Pages) ONSEMI

13 / 17 page

FS7140, FS7145

http://onsemi.com

Table 9. DEVICE CONFIGURATION BITS

Name

Description

REFDSRC

Reference divider source

[0] = crystal oscillator / [1] = REF pin

FBKDSRC

Feedback divider source

[0] = VCO output / [1] = post divider output

SHUT1

Shutdown1

[0] = normal / [1] = powered down

SHUT2

Shutdown2

[0] = normal / [1] = powered down

CMOS

CLKP/CLKN output mode

[0] = PECL output / [1] CMOS output

Table 10. MAIN LOOP TUNING BITS

Name

Description

CP[1:0]

Charge pump current

[00]

2.0 mA

[01]

4.5 mA

[10]

11.0 mA

[11]

22.5 mA

LR[1:0]

Loop filter resistor select

[00]

400 KW

[01]

133 KW

[10]

30 KW

[11]

12 KW

Loop filter capacitor select

[0]

185 pF

[1]

500 pF

Table 11. PLL DIVIDER CONTROL BITS

Name

Description

REFDIV[11:0]

Reference divider (NR)

FBKDIV[13:0]

Feedback divider (NR)

Table 12. SYNC CONTROL BITS (FS7145 only)

Name

Description

SYNCEN

Sync enable

[0] = disabled / [1] = enabled

SYNCPOL

Sync polarity

[0] = negative edge / [1] = positive edge

Table 13. POST DIVIDER CONTROL BITS

Name

Description

POST1[3:0]

Post divider #1 (NP1) modulus

[0000]

[0001]

[0010]

[0011]

[0100]

[0101]

[0110]

[0111]

[1000]

[1001]

[1010]

[1011]

[1100]

Do not use

[1101]

[1110]

[1111]

POST2[3:0]

Post divider #2 (NP2) modulus

[0000]

[0001]

[0010]

[0011]

[0100]

[0101]

[0110]

[0111]

[1000]

[1001]

[1010]

[1011]

[1100]

Do not use

[1101]

[1110]

[1111]

POST3[1:0]

Post divider #3 (NP3) modulus

[00]

[01]

[10]

[11]

FS7140 Datasheet(PDF) 13 Page - ON Semiconductor

FS7140 Datasheet(HTML) 13 Page - ON Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Datasheet Download

Link URL