LTC6990H View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC6990H

TimerBlox: Voltage Controlled Silicon Oscillator

Linear Technology 

LTC6990

TYPICAL APPLICATIONS

Quadrature Sine Wave Oscillator. Voltage Controlled Frequency Range

from ~5Hz to ~20kHz with 1VP-P Constant Output Amplitude

51.1k

1.18VREF

SINE

COSINE

5.11k

2 N 4 S1

INV1 3 – 5V

+–

124k

+

–

1 BP

14 LP

LTC1059*

8 CLOCK

5 SA 11 AGND 9 50/100

2.5V FOR 5Hz TO 10kHz

10k

5V FOR 10Hz TO 20kHz

2.5V

2k

5V

LT1004-2.5V

1M

VCC

OUT

LTC1440

V–

1.18VREF

HYST

5V

OUT

OE

LTC6990

5V

V+

GND

R1

1M

DIV

SET

RVCO

267k

R2

280k

RSET

49.9k

6990 TA09

*1/2 OF AN LTC1060 FILTER CAN

BE USED IN PLACE OF THE LTC1059

4.12k

0.1µF

FREQ

ADJ

1M

Temperature to Frequency Converter.

3% Linearity from –20°C (fOUT ≈ 20kHz) to 75°C (fOUT ≈ 25kHz)

5V

OE

OUT

LTC6990

GND

V+

60.4k

22k AT 25°C

B = 3964

21.5k

+

SET

DIV

6990 TA10

fOUT

5V

1M

523k

THERMISTOR: VISHAY NTHS120601N2202J

For more information www.linear.com/LTC6990

6990fc

25

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