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NTE864

Integrated Circuit Precision Waveform Generator

NTE Electronics 

System Description (Cont’d):

The square wave output is an open collector transistor; output amplitude swing closely approaches

the supply voltage. Triangle output amplitude is typically 1/3 of the supply, and sine wave output

reaches 0.22 of the supply voltage.

Electrical Characteristics: (VS = ±5V to ±15V, TA = +25°C, RL = 1MΩ, RA = RB = 10kΩ, C1 = 3300pF,

S1 closed, unless otherwise specified.)

Parameter

Test Conditions

Min Typ Max Unit

General Characteristics

Supply Voltage, VS

Single Supply

Dual Supplies

Supply Current

VS = ±10V, Note 1

Frequency Characteristics (Measured at Pin9)

10

– 30

V

±5

– ±15

V

–

12 15 mA

Range of Adjustment

Max. Operatring Frequency

Lowest Practical Frequency

Max. Sweep Frequency of

FM Input

FM Sweep Range

RA = RB = 1.5kΩ, C1 = 680pF, RL = 10kΩ

RA = RB = 1MΩ, C1 = 500µF, (Low Leakage Cap)

S1 Open, Note 2, Note 3

FM Linearity 10:1 Ratio

Range of Timing Resistors

Temperature Stability

Power Supply Stability

S1 Open, Note 3

Values of RA and RB

Note 4

200 –

–

kHz

– 0.001 –

Hz

– 100 –

kHz

– 1000: –

–

1

– 0.1 –

%

0.5 – 1000 kΩ

–

50 100 ppm/°C

– 0.05 – %/V

Output Characteristics

Square Wave (Pin9)

Amplitude (Peak–to–Peak)

Saturation Voltage

Rise Time

Fall Time

Duty Cycle Adjust

Triangle/Sawtooth/Ramp (Pin3)

Amplitude (Peak–to–Peak)

Linearity

Output Impedance

Sine–Wave Distortion

Amplitude (Peak–to–Peak)

Unadjusted

Adjusted

RL = 100kΩ

ISINK = 2mA

RL = 4.7kΩ

RL = 4.7kΩ

RL = 100kΩ

IOUT = 5mA

RL = 100kΩ

RL = 1MΩ, Note 5, Note 6

0.9 0.98 – x VSPLY

–

0.2 0.4

V

– 100 –

ns

–

40

–

ns

2

–

98

%

0.3 0.33

– 0.05

– 200

– x VSPLY

–

%

–

Ω

0.2 0.22 – x VSPLY

–

0.7 1.5

%

– 0.5 –

%

Note 1 Currents through RA and RB not included.

Note 2 VSUPPLY = 20V

Note 3 Apply sweep voltage at Pin8. VCC – (1/3 VSUPPLY – 2) ≤ VPIN8 ≤ VCC, VSUPPLY = Total Supply

Voltage across the IC

Note 4 10V ≤ VS ≤ 30V or ±5V ≤ VS ≤ ±15V.

Note 5 82kΩ resistor connected between Pin11 and Pin12.

Note 6 Triangle duty cycle set at 50%, use RA and RB.

Note 7 As RL is decreased distortion will increase, RL min. ≅ 50kΩ.

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