FX828D2 datasheet(28/34 Pages) CMLMICRO

28 / 34 page

CTCSS/DCS/SELCALL Processor

FX828

D/828/4

Operating Characteristics

For the following conditions unless otherwise specified:

Xtal Frequency = 4.032MHz

Audio Level 0dB ref = 308mVrms at 1kHz

VDD = 3.3V to 5.0V, Tamb = -40°C to +85°C.

Composite Signal = 308mVrms at 1kHz + 75mVrms Noise + 31mVrms Sub-Audio Signal

Noise Bandwidth = 5kHz Band Limited Gaussian

Notes

Min.

Typ.

Max.

Units

DC Parameters

At VDD = 3.3V

IDD (all powersaved)

0.5

1.0

IDD (FAST DETECT Enabled)

0.7

2.5

IDD (Rx Operating - DCS, FAST DETECT and

CTCSS or Selcall)

1.0

4.5

IDD (Tx Operating - DCS or Selcall or SUB

AUDIO)

0.7

3.0

IDD (Tx Operating - DCS and Selcall)

0.8

4.0

At VDD = 5V

IDD (all powersaved)

1.0

1.5

IDD (FAST DETECT Enabled)

1.1

4.5

IDD (Rx Operating - DCS, FAST DETECT and

CTCSS or Selcall)

1.7

7.5

IDD (Tx Operating - DCS or Selcall or SUB

AUDIO)

1.2

6.0

IDD (Tx Operating - DCS and Selcall)

1.3

6.5

"C-BUS" Interface

Input Logic "1"

70%

VDD

Input Logic "0"

30%

VDD

Input Leakage Current (Logic "1" or "0")

-1.0

1.0

µA

Input Capacitance

7.5

Output Logic "1" (IOH = 120µA)

90%

VDD

Output Logic "0" (IOL = 360µA)

10%

VDD

"Off" State Leakage Current (Vout = VDD)

µA

AC Parameters

TONE Decoder

Sensitivity

(Pure Tone)

-26.0

CTCSS

Response Time

(Composite Signal)

140

De-response Time

(Composite Signal)

145

Frequency Range

253

SELCALL

Response Time

(Good Signal)

De-response Time

(Good Signal)

Frequency Range

625

3000

DCS Decoder

Bit-Rate Sync Time

edges

Sensitivity

116

mVp-p

FX828D2 Datasheet(PDF) 28 Page - CML Microcircuits

FX828D2 Datasheet(HTML) 28 Page - CML Microcircuits

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