MICRF213 データシートの表示（PDF） - Micrel

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MICRF213

3.3V, QwikRadio® 315MHz Receiver

Micrel 

Micrel, Inc.

MICRF213

Pin Configuration

RO1 1

GNDRF 2

ANT 3

GNDRF 4

VDD 5

SQ 6

SEL0 7

SHDN 8

16 RO2

15 NC

14 RSSI

13 CAGC

12 CTH

11 SEL1

10 DO

9 GND

MICRF213AYQS

Pin Description

16-Pin

QSOP

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

Pin

Name

RO1

GNDRF

ANT

GNDRF

VDD

SQ

SEL0

SHDN

GND

DO

SEL1

CTH

CAGC

RSSI

NC

RO2

Pin Function

Reference resonator input connection to Colpitts oscillator stage. May also be driven by external reference

signal of 1.5V p-p amplitude maximum.

Negative supply connection associated with ANT RF input.

RF signal input from antenna. Internally AC-coupled. It is recommended that a matching network with an

inductor-to-RF ground is used to improve ESD protection.

Negative supply connection associated with ANT RF input.

Positive supply connection for all chip functions.

Squelch control logic input with an active internal pull-up when not shut down.

Logic control input with active internal pull-up. Used in conjunction with SEL1 to control the demodulator low

pass filter bandwidth. (See filter table for SEL0 and SEL1 in application section)

Shutdown logic control input. Active internal pull-up.

Negative supply connection for all chip functions except RF input.

Demodulated data output.

Logic control input with active internal pull-up. Used in conjunction with SEL0 to control the demodulator low

pass filter bandwidth. (See filter table for SEL0 and SEL1 in application subsection)

Demodulation threshold voltage integration capacitor connection. Tie an external capacitor across CTH pin

and GND to set the settling time for the demodulation data slicing level. Values above 1nF are

recommended and should be optimized for data rate and data profile.

AGC filter capacitor connection. CAGC capacitor, normally greater than 0.47uF, is connected from this pin to

GND

Received signal strength indication output. Output is from a buffer with 200 ohms typical output impedance.

Not Connected (Connect to Ground)

Reference resonator input connection to Colpitts oscillator stage, 7pF, in parallel with low resistance MOS

switch-to-GND, during normal operation. Driven by startup excitation circuit during the internal startup control

sequence.

May 2007

2

M9999-052307-A

(408) 944-0800

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