TH71112(2001) Просмотр технического описания (PDF) - Melexis Microelectronic Systems

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TH71112
(Rev.:2001)

868/915MHz FSK/FM/ASK Receiver

Melexis Microelectronic Systems  

TH71112

868/915MHz

FSK/FM/ASK Receiver

Pin Definition and Description

Pin No. Name

3 OUT_LNA

I/O Type

analog

output

Functional Schematic

OUT_LNA

3

31 IN_LNA

analog

5k

input

IN_LNA

31

1 VEE_LNAC ground

VEE_LNAC

1

2 GAIN_LNA analog

input

GAIN_LNA

2

400Ω

Description

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)

4 IN_MIX1

analog

input

5 VEE_MIX ground

IN_MIX1

4

MIX1 input, approx. 33Ω

13Ω

single-ended

13Ω

500µA

LNA biasing ground

6 IF1P

analog I/O

IF1P

6

VCC

20p

20p

open-collector output, to be

IF1N connected to external LC

tank that resonates at first IF

7

7 IF1N

analog I/O

VEE

2x500µA

VEE

open-collector output, to be

connected to external LC

tank that resonates at first IF

8 VCC_MIX supply

MIX1 and MIX2 positive

supply

9 OUT_MIX2 analog

output

MIX2 output, approx. 330Ω

6.8k

output impedance

OUT_MIX2

130Ω

9

230µA

10 VEE_IF

ground

ground for MIX2, IFA and

DEMOD

TH71112 Data Sheet

3901071112

Page 5 of 20

Nov. 2001

Rev. 005

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