CF8224C View Datasheet(PDF) - Nippon Precision Circuits

Part Name

Description

Manufacturer

CF8224C

Dual-Tone Receiver IC

Nippon Precision Circuits  

SM8224C

AC Electrical Characteristics

Measurement conditions: R1 = 430kΩ, R2 = 34kΩ, R3 = 390kΩ, C1= 0.22µF

FSK decoder

VDD = 2.7 to 5.5V, GND = 0V, fCLK = 3.579545MHz, Ta = −20 to 85°C unless otherwise noted.

Parameter

Symbol

Input sensitivity

S/N ratio1

FSKSNR

Carrier detection sensitivity

Carrier non-detection sensitivity

Oscillator frequency

CD ON

CD OFF

f CLK

1. Mark signal and SPACE signal are same level.

Noise: Random noise from 200Hz to 3400Hz.

Condition

Rating

Unit

min

typ

max

–

−43

CDON

dBm

20

–

–

dB

–

−43

−37.78

dBm

−50

−46

–

dBm

typ − 0.1% 3.579545 typ + 0.1%

MHz

Dual tone detector

VDD = 2.7 to 5.5V, GND = 0V, fCLK = 3.579545MHz, Ta = −20 to 85°C unless otherwise noted.

Parameter

Frequency (low frequency)

Frequency (high frequency)

Detection frequency deviation

Non-detection frequency deviation

Detection sensitivity

Non-detection sensitivity

Signal level deviation

Symbol

fL

fH

Condition

Rating

Unit

min

typ

max

–

2130

–

Hz

–

2750

–

Hz

1.1

–

–

%

3.5

–

–

%

−37.78

–

–

dBm

–

–

−43.78

dBm

–

–

6

dB

Note: (S0, S1, MODE) = (VDD, 0V, 0V)

Input-stage amplifier Characteristics

VDD = 2.7 to 5.5V, GND = 0V, fCLK = 3.579545MHz, Ta = −20 to 85°C unless otherwise noted.

Parameter

Input leakage current

DC open-loop voltage gain

Unity gain frequency

Load capacitance

Load resistance

Symbol

I IN

G OL

fC

CL

RL

Condition

Rating

Unit

min

typ

max

–

–

1

µA

30

–

–

dB

80

–

–

kHz

–

–

100

pF

50

–

–

kΩ

SEIKO NPC CORPORATION —6

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