MMM5063 datasheet(12/20 Pages) FREESCALE

Part #	MMM5063

Description	Tri-Band GSM GPRS 3.5 V Power Amplifier

PDF	20 Pages

Scroll/Zoom	100%

Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

Logo

12 / 20 page

ARCHIVED BY FREESCALE SEMICONDUCTOR, INC. 2005

MMM5063 Advance Information

MOTOROLA

Application Information

R8 and RVapc set Vapc at 0.9 V while R7 sets the Vapc slope. Vapc versus Vdrain is shown in the Figure 20.

Figure 20. Vapc versus Vdrain

It is possible that the Power Control DAC output voltage can be in the 200 mV to 2.0 V range. This raises

a concern for the MMM5063 ramp control voltage (Vramp) which must start at 0 V to get enough output

power dynamic range. To overcome this limitation, a resistor (R6 in Figure 22) is used to set an additional

offset (200 mV with R6 = 39 k

Ω). This residual voltage is then subtracted the DAC output voltage through

the differential Operational Amplifier.

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

drain (V)

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

MMM5063 Datasheet(PDF) 12 Page - Freescale Semiconductor, Inc