NTE989 datasheet(2/4 Pages) NTE | Integrated Circuit General Purpose Phase Lock Loop (PLL)

2 page

Electrical Characteristics: (TA = +25°C, VC = ±6V unless otherwise specified)

Parameter

Conditions

Min

Typ

Max

Unit

Power Supply Current

–

8.0

12.5

Input Impedance (Pins 2,3)

–4V

< V2, V3 < 0V

–

Ω

VCO Maximum Operating Frequency

Co = 2.7pF

250

500

–

kHz

Operating Frequency Temperature Coefficient

–

–200

500

ppm/

°C

Frequency Drift with Supply Voltage

–

0.05

0.2

%/V

Triangle Wave Output Voltage

2.4

Vp–p

Triangle Wave Output Linearity

–

0.5

Square Wave Output Level

4.7

5.4

–

Vp–p

Output Impedance (Pin 4)

–

Ω

Square Wave Duty Cycle

Square Wave Rise Time

–

Square Wave Fall Time

–

Output Current Sink (Pin 4)

0.6

–

VCO Sensitivity

fo = 10kHZ

6000

6600

7200

HZ/V

Demodulated Output Voltage (Pin 7)

±10% Frequency Deviation

200

300

400

mVpp

Total Harmonic Distortion

±10% Frequency Deviation

–

0.2

1.5

Output Impedance (Pin 7)

–

3.5

–

Ω

DC Level (Pin 7)

4.0

4.5

5.0

Output Offset Voltage |V7 – V6|

–

200

Temperature Drift of |V7 – V6|

–

500

–

µV/°C

AM Rejection

–

Phase Detector Sensitivity KD

0.55

.68

0.95

V/radian

Applications Information:

In designing with phase locked loops the important parameters of interest are:

FREE RUNNING FREQUENCY

fo ≅

3.7 R0C0

LOOP GAIN:

The Loop Gain relates the amount of phase change between the input signal and the VCO sig-

nal for a shift in input signal frequency (assuming the loop remains in lock). In servo theory,

this is called the “velocity error coefficient”.

radians/sec

volt

Loop gain = KoKD

sec

Ko = oscillator sensitivity

KD = phase detector sensitivity

volts

radian

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