CF8223A datasheet(5/15 Pages) NPC

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SM8223A

NIPPON PRECISION CIRCUITS—5

AC Electrical Characteristics

FSK decoder

VDD = 3.0V ± 0.3V, GND = 0V, fCLK = 3.579545MHz, Ta = −20 to 85°C unless otherwise noted.

DTMF receiver

VDD = 3.0V ± 0.3V, GND = 0V, fCLK = 3.579545MHz, Ta = −20 to 85°C unless otherwise noted.

Input-stage ampliﬁer Characteristics

VDD = 3.0V ± 0.3V, GND = 0V, fCLK = 3.579545MHz, Ta = −20 to 85°C unless otherwise noted.

P arameter

Symbol

Condition

Rating

Unit

min

typ

m a x

Detection sensitivity

Typical application circuit

−40

−37.5

d B m

Noise reduction ratio

M a r k signal and SPA C E

signal are same level.

Noise: Random noise from

200Hz to 3400Hz.

–

d B

P arameter

Symbol

Condition

Rating

Unit

min

typ

m a x

Detection frequency deviation

Typical application circuit

±1.5% ± 2

–

H z

Non-detection frequency deviation

±3.5

–

Detection sensitivity

−32.0

–

0.0

d B m

Non-detection sensitivity

––

−50.0

d B m

Signal level error

Typical application circuit1

1. Input signal is up to V DD level.

––6

d B

High-frequency rejection ratio

–

1 8

–

d B

Noise rejection ratio

–1 2–

d B

Dial tone rejection ratio

–2 0–

d B

P arameter

Symbol

Condition

Rating

Unit

min

typ

m a x

Input leakage current

IIN

––1

µ A

Input resistance

R IN

–1–

Ω

DC open-loop voltage gain

AVOL

–

d B

Unity gain frequency

8 0

–

kHz

Load capacitance

C L

–

100

p F

Load resistance

R L

–

Ω

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