Datasheet > FX818

FX818

更新时间： 2022-04-01 09:21:10

品牌	Logo	应用领域
CMLMICRO		/
页数	文件大小	规格书
26页	672K
描述
CTCSS SIGNALLING PROCESSOR

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数据手册

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FX818 数据手册

CTCSS Signalling Processor

FX818

Notes

Min.

Typ.

Max.

Units

Audio Band-Pass Filter

Passband

300

3000

dBp

kHz

Passband Gain (at 1.0kHz)

Passband Ripple (w.r.t. gain at 1.0kHz)

Stopband Attenuation

Residual Hum and Noise

Alias Frequency

-2

33.0

+0.5

-50.0

Output Impedances

TX SUB-AUDIO OUT and (Enabled)

2.0

500

RX AUDIO OUT

(Disabled)

Rx Amp and Summing Amp

Open Loop Gain

(I/P = 1mV at 100Hz)

70.0

5.0

MHz

Unity Gain Bandwidth

Input Impedance

Output Impedance

(at 100Hz)

(Open Loop)

6.0

Transmitter Modulator Drives:

Mod.1 Attenuator

Attenuation (at 0dB)

-0.2

-1.0

0.2

1.0

Cumulative Attenuation Error

(wrt attenuation at 0dB)

Output Impedance

600

15.0

Input Impedance (at 100Hz)

Mod.2 Attenuator

Attenuation (at 0dB)

Cumulative Attenuation Error

(wrt attenuation at 0dB)

Output Impedance

-0.2

-0.6

0.2

0.6

600

General Purpose Timer

Timing Period Range

Count Interval

242

0.95

Xtal/Clock Input

Pulse Width ('High' or 'Low')

Input Impedance (at 100Hz)

Gain (I/P = 1mVrms at 100Hz)

40.0

10.0

20.0

Notes:

1. At V = 5.0V only. Signal levels or currents are proportional to V

2. Not including any current drawn from the device pins by external circuitry.

3. Small signal impedance, at V = 5.0V and Tamb = 25°C.

4. Timing for an external input to the XTAL/CLOCK pin.

5. With input gain components set as recommended in Figure 2.

6. IRQN pin.

7. From one tone to another tone.

8. See filter response (Figure 3).

9. Measured at MOD1 or MOD2 output.

ã 1997 Consumer Microcircuits Limited

D/818/4

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