TH7111 데이터 시트보기 (PDF) - Melexis Microelectronic Systems

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TH7111

868/915MHz FSK/FM/ASK Receiver

Melexis Microelectronic Systems  

TH7111

868/915MHz

FSK/FM/ASK Receiver

Pin Definition and Description

Pin No. Name

1 VREF

I/O Type

analog

output

Functional Schematic

VREF

1

60k

Description

reference voltage output,

approx. 1.23V

4 OUT_LNA analog

output

42 IN_LNA

analog

input

2 VEE_LNAC ground

3 GAIN_LNA analog

input

5k

IN_LNA

42

GAIN_LNA

3

400Ω

OUT_LNA

4

VEE_LNAC

2

LNA open-collector output,

to be connected to external

LC tank that resonates at RF

LNA input,

approx. 26Ω single-ended

ground of LNA core

(cascode)

LNA gain control (CMOS

input with hysteresis)

5 VEE_LNA ground

6 IN_MIX1

analog

input

IN_MIX1

6

7 CAP_MIX1 analog I/O

CAP_MIX1

7

LNA biasing ground

MIX1 input, approx. 33Ω

13Ω

single-ended

13Ω

500µA

40µA

330Ω

connection for MIX1

blocking capacitor

8 VEE_MIX1 ground

9 IF1P

10 IF1N

analog I/O

IF1P

9

analog I/O

VCC

20p

20p

VEE

2x500µA

VEE

MIX1 ground

open-collector output, to be

IF1N connected to external LC

tank that resonates at first IF

10

open-collector output, to be

connected to external LC

tank that resonates at first IF

TH7111 Data Sheet

3901007111

Page 5 of 20

Nov. 2001

Rev. 005

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