TRF2050

LOW-VOLTAGE 1.2-GHz FRACTIONAL-N/INTEGER-N SYNTHESIZER

SLWS030E– JUNE 1996 – REVISED OCTOBER 2000

7

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

charge-pump current output definitions

I2

I1

I2

I1

Current

Voltage

∆ IOUT REL

∆ IOUT MATCH

ISINK

ISOURCE

∆ IOUT REL

V1

V2

Figure 1. Charge-Pump Output Current Definitions

The relative output current variation is defined as the percent difference between charge-pump current output

at two charge-pump output voltages and the mean charge-pump current output (see Figure 1):

DI

OUT REL

I

OUT MEAN

+ 2

I

2

–I

1

I

2 )

I

1

× 100%; with V

1 +

0.7 V, V

2 +

V

DDA

–0.8 V.

Output current matching is defined as the difference between charge-pump sinking current output and

charge-pump sourcing current output at a given charge-pump output (see Figure 1).

serial-data interface timing

DATA

CLOCK

STROBE

tsu_Data

th_Data

tw_CLKHI

tw_CLKLO

tw_STRBHI

th_Strobe

D0

D1

D30

D31

VH

VL

VH

VL

VH

VL

Valid

Change

tsu_Strobe

Figure 2. Serial-Data Interface Timing