RF2689 Ver la hoja de datos (PDF) - RF Micro Devices

Número de pieza

componentes Descripción

Lista de partido

RF2689

W-CDMA/GSM/DCS RECEIVE AGC AND DEMODULATOR

RF Micro Devices 

RF2689

Preliminary

Pin Function Description

Interface Schematic

1

VGC1

Analog gain control. Valid control voltage ranges are form 0.5V to 2.5V.

These voltages are valid with a 10kΩ resistor in series with GC pin.

2

GSM IN+ GSM IF balanced input. Input internally DC-biased.

3

GSM IN- Same as pin 2.

4

W-CDMA W-CDMA IF balanced input. Input internally DC-biased.

IN+

BIAS

BIAS

1200 Ω

1200 Ω

W-CDMA IN+

W-CDMA IN-

5

W-CDMA Same as pin 4.

See pin 4.

IN-

6

VCC

Supply

7

MODE A DCS/GSM/GSM RX/W-CDMA mode selection.

8

LO

LO input pin. Input internally DC-biased.

7

9

MODE B Warm-up mode enable. The input LO buffers and divider chains are

enabled.

10

EN RX

Chip enable.

11

Q OUT- Complementary output to Q OUT+.

12

Q OUT+ Balanced baseband output.

VCC

VCC

150 µA

150 µA

Q OUT+

Q OUT-

13

I OUT-

Complementary output to I OUT+.

14

I OUT+ Balanced baseband output.

VCC

VCC

150 µA

150 µA

I OUT+

I OUT-

15

CALEN Calibration enable.

16

FCLK

FCLK clock reference for the automatic calibration circuitry.

20 kΩ

17

18

19

20

Pkg

Base

IF-

IF+

VREF2V

VGC2

Die

Flag

Complementary output to IF+.

IF test point output.

2V voltage reference decouple.

Gain control decouple.

Ground.

7-44

Rev A4 010815

Share Link: