MAX2203 Ver la hoja de datos (PDF) - Maxim Integrated

Número de pieza

componentes Descripción

Lista de partido

MAX2203

RMS Power Detector

Maxim Integrated 

RMS Power Detector

BUMP

A1

A2, B1

B2

C1

C2

Pin Description

NAME

RFIN/ENA

GND

FILT

VCC

OUT

FUNCTION

RF Input and Enable Logic Input. See the Typical Operating Circuit. Drive ENA high to turn on the

device. Drive ENA low to place it in shutdown mode.

Ground. Connect to PCB ground plane.

Intermediate Filtering Node. Bypass FILT with a capacitor as close as possible to the device.

Power Supply. Connect to either a regulated supply or battery. Bypass VCC with a capacitor as close

as possible to the device.

Detector Output. Connect an external lowpass RC filter for filtering.

Detailed Description

The MAX2203 RMS power detector is designed to

operate from 800MHz to 2.0GHz. The device is ideal for

WCDMA, cdma2000, and high-speed downlink/uplink

packet access. The MAX2203 accepts an RF signal at

the input and outputs the same voltage regardless of

the peak-average of the input signal. The output volt-

age and input power is linear in dB. The device has a

-24dBm to +3dBm detection range, and every dB

change in input power gives 35mV (typ) change in out-

put voltage. Table 1 shows the peak to average of the

signals used to test the MAX2203.

Table 1. Peak-to-Average Ratio (PAR*) of Test Signals

MODULATION

DPCCH + 1DPDCH

DPCCH + 5DPDCH

IS95 Reverse

IS95 Forward Pilot

9-Channel Forward

cdma2000 Pilot + DCCH

*PAR of CW is 3dB.

PAR AT DIFFERENT PROBABILITY OF COMPLEMENTARY CUMULATIVE

DISTRIBUTION (dB)

10%

1%

0.1%

0.01%

4.8

5.8

6.2

6.5

6.5

8.4

9.2

9.8

5.5

6.9

7.6

8.1

5.6

7.6

8.8

9.5

7

10.3

12

12.7

6.8

8.3

9.2

9.7

_______________________________________________________________________________________ 5

Share Link: