Datasheet > EVB71101

EVB71101

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
迈来芯 - MELEXIS		/
页数	文件大小	规格书
14页	613K
描述
315/433MHz Receiver Evaluation Board Description

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EVB71101 数据手册

EVB71101

315/433MHz Receiver

Evaluation Board Description

1.3 Block Diagram

11 12

MIX1

OUTP

OUTN

MIX3

IN_LNA

LNA

MIX2

IFA

OAP

OAN

PFD

DIV_16

OUT_OA

BIAS

VCO1

29 LF

26 RO

Fig. 1: TH71101 block diagram

1.4 Mode Configurations

ENRX

Mode

Description

RX disabled

RX enable

RX standby

RX active

Note: ENRX are pulled down internally

1.5 LNA GAIN Control

V_{GAIN_LNA}

< 0.8 V

> 1.4 V

Mode

Description

HIGH GAIN

LOW GAIN

LNA set to high gain

LNA set to low gain

Note: hysteresis between gain modes to ensure stability

1.6 Frequency Planning

Frequency planning is straightforward for single-conversion applications because there is only one IF that

can be chosen, and then the only possible choice is low-side or high-side injection of the LO signal (which is

now the one and only LO signal in the receiver).

The receiver’s single-conversion architecture requires careful frequency planning. Besides the desired RF

input signal, there are a number of spurious signals that may cause an undesired response at the output.

Among them is the image of the RF signal that must be suppressed by the RF front-end filter.

39012 71101 01

Rev. 011

Page 4 of 14

EVB Description

June/07

1 2 345 6 7...14

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