HFA3765IA 查看數據表（PDF） - Intersil

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HFA3765IA

AGC and Quadrature IF Demodulator

Intersil 

Pin Descriptions

PIN NUMBER

NAME

1

BYP+

2

IF_CDMA+

3

IF_CDMA-

4

GND

5

IF_FM+

6

IF_FM-

7

BYP -

8

AGC_CTRL

9

SEL

10

RX_PE

11

GND

12

GND_LO

13

V+_LO

14

LO_IN

15

GND_AMP

16

IOUT-

17

IOUT+

18

GND

19

QOUT-

20

QOUT+

21

V+_AMP

22

DEMOD+

23

DEMOD -

24

GND_AGC

25

GND

26

IF_OUT-

27

IF_OUT+

28

V+_AGC

HFA3765

DESCRIPTION

DC feedback pin for the AGC amplifier. Requires good RF decoupling to a solid ground.

Non-inverting analog input of the AGC amplifier, CDMA channel.Requires a DC blocking

capacitor. A parallel differential DC coupled resistor setting the input impedance with its

complementary input is possible.

Inverting analog input of the AGC amplifier, CDMA channel. Requires a DC blocking ca-

pacitor. A parallel differential DC coupled resistor setting the input impedance with its com-

plementary input is possible. AC couple to ground if the port is to be used single ended.

Ground. Connect to a solid ground plane.

Non-inverting analog input of the AGC amplifier, FM channel. Requires a DC blocking ca-

pacitor. A parallel differential DC coupled resistor setting the input impedance with its com-

plementary input is possible.

Inverting analog input of the AGC amplifier, FM channel. Requires a DC blocking capacitor.

A parallel differential DC coupled resistor setting the input impedance with its complemen-

tary input is possible. AC couple to ground if the port is to be used single ended.

DC feedback pin for the AGC amplifier. Require good RF decoupling to a solid ground.

AGC current control input. Requires a 15K 1% series resistor.

Selects the CDMA or FM AGC Amplifier differential input. HIGH selects the CDMA input;

LOW selects the FM input.

Power enable control input. HIGH for normal operation. LOW for power down.

Ground. Connect to a solid ground plane.

LO_IN input ground return. Ground to Local Oscillator ground plane or transmission line.

LO divider network Power Supply. Use high quality RF decoupling capacitors at the pin.

Current input from the Local Oscillator. Use a 50Ω power to current converter. See appli-

cations diagram. Requires a DC blocking capacitor.

IF output amplifiers ground return.

Negative I channel baseband output. Requires a DC blocking capacitor.

Positive I channel baseband output. Requires a DC blocking capacitor.

Ground. Connect to a solid ground plane.

Negative Q channel baseband output. Requires a DC blocking capacitor.

Positive Q channel baseband output. Requires a DC blocking capacitor.

IF output amplifier Power Supply. Use high quality RF decoupling capacitors at the pin.

Positive input of the quadrature demodulator. Requires a DC blocking capacitor.

Negative input of the quadrature demodulator. Requires a DC blocking capacitor.

AGC amplifier main ground return.

Ground. Connect to a solid ground plane.

Negative output from the AGC amplifier. Requires a DC blocking capacitor.

Positive output from the AGC amplifier. Requires a DC blocking capacitor.

AGC amplifier Power Supply. Use high quality RF decoupling capacitors at the pin.

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