FX829P4 datasheet(26/34 Pages) CMLMICRO

26 / 34 page

Baseband Signal Processor

FX829

D/829/4

Operating Characteristics

For the following conditions unless otherwise specified:

Xtal Frequency = 4.032MHz, Bit Rate = 1.2k bits/sec, Noise Bandwidth = Bit Rate,

Audio Level 0dB ref = 308mVrms at 1kHz

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

Notes

Min.

Typ.

Max.

Units

DC Parameters

IDD (Powersaved)

(VDD = 5.0V)

0.6

1.5

IDD (Tx or Rx Voice)

(VDD = 5.0V)

5.0

8.0

IDD (Powersaved)

(VDD = 3.3V)

0.3

1.0

IDD (Tx or Rx Voice)

(VDD = 3.3V)

2.7

4.0

"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

Input Sensitivity (for 0dB output)

Tx Audio Input (MIC)

308

mVrms

Rx Audio Input (DEMODFB)

308

mVrms

Output Drive Level

For 60% Deviation

1, 6, 8

291

308

326

mVrms

For 100% Deviation

1, 6, 7, 8

1440

mVpk-pk

Audio Filters

Gain at 1kHz

Passband Ripple

-2.0

0.5

SINAD

5, 14

dBp

Signal Path Noise

-55

Narrrow Audio Bandwidth Setting

Passband Frequencies

300

2550

Stopband Attenuation:

(f = 100Hz)

3.0

(f = 3400Hz)

5.5

(f = 6000Hz)

10.5

(f = 12500Hz)

Wide Audio Bandwidth Setting

Passband Frequencies

300

3000

Stopband Attenuation:

(f = 100Hz)

3.0

(f = 3400Hz)

3.0

(f = 6000Hz)

10.5

(f = 25000Hz)

39.5

FX829P4 Datasheet(PDF) 26 Page - CML Microcircuits

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